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Vargas Campos CA, García-Pérez S, Figuerola J, Martínez-de la Puente J, Polo I, Rodríguez-de-Fonseca B, Fernández-Álvarez S, Galván Fraile V, Martín-Rey M, Lacasaña M, Bermúdez-Tamayo C. Comprehensive analysis of West Nile Virus transmission: Environmental, ecological, and individual factors. An umbrella review. One Health 2025; 20:100984. [PMID: 40040921 PMCID: PMC11876902 DOI: 10.1016/j.onehlt.2025.100984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2024] [Revised: 01/24/2025] [Accepted: 01/30/2025] [Indexed: 03/06/2025] Open
Abstract
Background West Nile Virus (WNV) exemplifies the complexities of managing vector-borne diseases, expanding globally due to human activities and ecological changes. Originating from Africa and transmitted by Culex mosquitoes, WNV is now reported across multiple continents. The aim of this study was to identify the environmental, ecological, and individual factors influencing WNV transmission. Methods An umbrella review was conducted. Comprehensive searches were performed in PubMed, Scopus, Web of Science, Embase, and LILACS. Inclusion criteria were reviews involving WNV transmission agents (reservoirs, vectors, hosts) and associative analyses between environmental, ecological, or individual factors and WNV transmission. Data extraction and quality appraisal were performed using templates and the AMSTAR 2 tool. Results From 404 retrieved studies, 23 systematic reviews and meta-analyses were included. Almost 70 % were low or critically low quality. The co-occurrence network highlighted emerging research on climate change and environmental factors. Temperature, precipitation, and land use significantly influence WNV transmission. Warmer temperatures enhance mosquito populations and viral replication, while extreme weather events like droughts increase mosquito-human contact. Climate change significantly contributes to WNV dynamics by altering temperature and precipitation patterns, enhancing vector proliferation, and extending transmission seasons. Ecological factors such as higher avian diversity, vegetation indexes, and distribution of mosquito species can impact WNV transmission significantly. Education and income levels influence preventive behaviors and infection risk, with lower socioeconomic status linked to higher WNV risk. Certain occupational groups are also at elevated risk of WNV infection. Conclusion Environmental factors like temperature and precipitation critically affect WNV transmission by influencing mosquito behavior and avian reservoir dynamics. Socio-economic status and education levels significantly impact individual preventive behaviors and infection risk. Multifactorial influences on infection risk make necessary integrated surveillance systems and public health strategies. Longitudinal studies with One Health approaches are necessary to better understand WNV dynamics and reduce WNV transmission.
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Affiliation(s)
- Carlos Adrián Vargas Campos
- Universidad Complutense de Madrid, Physics, Physics of the Earth and Astrophysics, Ciudad Universitaria, ZIP code 28040 Madrid, Spain
- Universidad de Granada, Av. Del Hospicio, 1, 18012 Granada, Spain
| | - Selene García-Pérez
- Unit of Preventive Medicine and Public Health, Puerto Real University Hospital, Calle Romería, 7, 11510, Puerto Real, Cádiz, Spain
- Andalusian School of Public Health EASP, Cta. del Observatorio, 4, Beiro, 18011 Granada, Spain
| | - Jordi Figuerola
- Department of Conservation Biology and Global Change, Estación Biológica de Doñana (EBD), CSIC, Avda. Américo Vespucio 26, 41092 Sevilla, Spain
- Ciber de Epidemiología y Salud Pública, CIBERESP, Av. Monforte de Lemos, 3-5, Pabellón 11. Planta 0, 28029 Madrid, Spain
| | - Josué Martínez-de la Puente
- Department of Conservation Biology and Global Change, Estación Biológica de Doñana (EBD), CSIC, Avda. Américo Vespucio 26, 41092 Sevilla, Spain
- Ciber de Epidemiología y Salud Pública, CIBERESP, Av. Monforte de Lemos, 3-5, Pabellón 11. Planta 0, 28029 Madrid, Spain
| | - Irene Polo
- Universidad Complutense de Madrid, Physics, Physics of the Earth and Astrophysics, Ciudad Universitaria, ZIP code 28040 Madrid, Spain
| | - Belén Rodríguez-de-Fonseca
- Universidad de Granada, Av. Del Hospicio, 1, 18012 Granada, Spain
- Geosciences Institute IGEO-CSIC, Madrid, Spain
| | - Sofía Fernández-Álvarez
- Universidad Complutense de Madrid, Physics, Physics of the Earth and Astrophysics, Ciudad Universitaria, ZIP code 28040 Madrid, Spain
| | - Víctor Galván Fraile
- Universidad Complutense de Madrid, Physics, Physics of the Earth and Astrophysics, Ciudad Universitaria, ZIP code 28040 Madrid, Spain
| | - Marta Martín-Rey
- Universidad Complutense de Madrid, Physics, Physics of the Earth and Astrophysics, Ciudad Universitaria, ZIP code 28040 Madrid, Spain
| | - Marina Lacasaña
- Andalusian School of Public Health EASP, Cta. del Observatorio, 4, Beiro, 18011 Granada, Spain
- Ciber de Epidemiología y Salud Pública, CIBERESP, Av. Monforte de Lemos, 3-5, Pabellón 11. Planta 0, 28029 Madrid, Spain
- Instituto de Investigación Biosanitaria ibs.GRANADA, Avda. de Madrid, 15, Pabellón de Consultas Externas, 2ª Planta, 18012 Granada, Spain
| | - Clara Bermúdez-Tamayo
- Andalusian School of Public Health EASP, Cta. del Observatorio, 4, Beiro, 18011 Granada, Spain
- Ciber de Epidemiología y Salud Pública, CIBERESP, Av. Monforte de Lemos, 3-5, Pabellón 11. Planta 0, 28029 Madrid, Spain
- Instituto de Investigación Biosanitaria ibs.GRANADA, Avda. de Madrid, 15, Pabellón de Consultas Externas, 2ª Planta, 18012 Granada, Spain
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Lara M, Casimiro-Soriguer CS, Pedrosa-Corral I, Gómez-Camarasa C, Lorusso N, Navarro-Marí JM, Dopazo J, Perez-Florido J, Sanbonmatsu-Gámez S. First autochthonous transmission of West Nile virus (WNV) lineage 2 to humans in Spain. One Health 2025; 20:101036. [PMID: 40276693 PMCID: PMC12018207 DOI: 10.1016/j.onehlt.2025.101036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2025] [Revised: 04/07/2025] [Accepted: 04/10/2025] [Indexed: 04/26/2025] Open
Abstract
West Nile Virus (WNV) lineage 2, primarily endemic to parts of Africa and Europe, has recently emerged as a public health concern in new geographic regions. In 2024, the first autochthonous human case of neuroinvasive disease caused by WNV lineage 2 was identified in Andalusia, Southern Spain. Molecular testing and whole-genome sequencing confirmed WNV lineage 2 as the causative agent. Phylogenetic analysis revealed a close relationship with strains circulating in Central Europe, distinct from previous WNV lineage 2 detections in Spain. Concurrently, WNV lineage 2 RNA was detected in an imperial eagle near the case location, suggesting local viral circulation. This case marks a significant shift in WNV epidemiology in Spain, where lineage 1 has historically been dominant. The findings underscore the expanding range of WNV lineage 2 and the necessity for enhanced vector surveillance, genomic monitoring, and strengthened One Health strategies to mitigate future outbreaks and protect public health.
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Affiliation(s)
- Maria Lara
- Platform of Computational Medicine, Fundación Progreso y Salud (FPS), Hospital Virgen del Rocio, 41013 Sevilla, Spain
| | - Carlos S. Casimiro-Soriguer
- Platform of Computational Medicine, Fundación Progreso y Salud (FPS), Hospital Virgen del Rocio, 41013 Sevilla, Spain
- Institute of Biomedicine of Seville, IBiS, University Hospital Virgen del Rocío/CSIC/University of Sevilla, 41013 Sevilla, Spain
| | - Irene Pedrosa-Corral
- Laboratorio de Referencia de Virus de Andalucía, Servicio de Microbiología, Hospital Virgen de las Nieves, 18014 Granada, Spain
- Instituto de investigación biosanitaria, ibs.GRANADA, 18012 Granada, Spain
| | - Cristina Gómez-Camarasa
- Laboratorio de Referencia de Virus de Andalucía, Servicio de Microbiología, Hospital Virgen de las Nieves, 18014 Granada, Spain
- Instituto de investigación biosanitaria, ibs.GRANADA, 18012 Granada, Spain
| | - Nicola Lorusso
- Dirección General de Salud Pública y Ordenación Farmacéutica, Consejería de Salud y Consumo. Junta de Andalucía, 41020 Sevilla, Spain
| | - Jose M. Navarro-Marí
- Laboratorio de Referencia de Virus de Andalucía, Servicio de Microbiología, Hospital Virgen de las Nieves, 18014 Granada, Spain
- Instituto de investigación biosanitaria, ibs.GRANADA, 18012 Granada, Spain
| | - Joaquin Dopazo
- Platform of Computational Medicine, Fundación Progreso y Salud (FPS), Hospital Virgen del Rocio, 41013 Sevilla, Spain
- Institute of Biomedicine of Seville, IBiS, University Hospital Virgen del Rocío/CSIC/University of Sevilla, 41013 Sevilla, Spain
| | - Javier Perez-Florido
- Platform of Computational Medicine, Fundación Progreso y Salud (FPS), Hospital Virgen del Rocio, 41013 Sevilla, Spain
- Institute of Biomedicine of Seville, IBiS, University Hospital Virgen del Rocío/CSIC/University of Sevilla, 41013 Sevilla, Spain
| | - Sara Sanbonmatsu-Gámez
- Laboratorio de Referencia de Virus de Andalucía, Servicio de Microbiología, Hospital Virgen de las Nieves, 18014 Granada, Spain
- Instituto de investigación biosanitaria, ibs.GRANADA, 18012 Granada, Spain
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Anderson JF, Bransfield A, Misencik MJ, Jones S, Main AJ, Armstrong PM, Andreadis TG, Molaei G. Host-feeding behavior of mosquitoes (Diptera: Culicidae) in North Dakota, 2003 to 2006. JOURNAL OF MEDICAL ENTOMOLOGY 2025; 62:621-632. [PMID: 39982739 DOI: 10.1093/jme/tjaf021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2024] [Revised: 01/16/2025] [Accepted: 01/30/2025] [Indexed: 02/22/2025]
Abstract
Mosquitoes are abundant near temporary, semipermanent, and permanent water in North Dakota and are associated with human and veterinary diseases. Little is known about the feeding habits of mosquitoes as related to the transmission of arboviruses. We report on the identification of vertebrate hosts of 9 species of mosquitoes collected in 2003 to 2006. Blood meals of 1,223 from 9 mosquito species were identified to vertebrate species by PCR assays using the mitochondrial cytochrome b gene. Aedes dorsalis (Diptera: Culicidae) and Culiseta inornata fed only on mammals, and Aedes vexans fed almost exclusively on mammals. Aedes trivittatus fed significantly more on mammals than on birds. Culex tarsalis acquired blood meals from the most diverse group of vertebrates, frequently fed on American Robins, and did not exhibit a seasonal shift of feeding on birds to mammals. The extensive feeding of Cx. tarsalis on passerine birds and the isolation of West Nile virus (WNV) from 2 specimens that had fed on passerines supports their role in horizontal transmission of WNV. This species also transmits western equine encephalitis virus. Host feeding by Ae. trivittatus, Ae. vexans, Cs. inornata, and Ae. dorsalis in relation to their possible importance in transmission of trivittatus virus, Cache Valley virus, Jamestown Canyon virus, Potosi virus, or snowshoe hare virus is presented. The identification of host feeding behavior pattern of specific species of mosquitoes enhances our understanding of the enzootic and epizootic nature of 7 viruses in North Dakota.
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Affiliation(s)
- John F Anderson
- Department of Entomology and Center for Vector Biology & Zoonotic Diseases, The Connecticut Agricultural Experiment Station, New Haven, CT, USA
| | - Angela Bransfield
- Department of Entomology and Center for Vector Biology & Zoonotic Diseases, The Connecticut Agricultural Experiment Station, New Haven, CT, USA
| | - Michael J Misencik
- Department of Entomology and Center for Vector Biology & Zoonotic Diseases, The Connecticut Agricultural Experiment Station, New Haven, CT, USA
| | - Sydney Jones
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, CT, USA
| | - Andy J Main
- Biology Department, American University in Cairo, AUC Avenue, PO Box 74, New Cairo, 11835, Egypt
| | - Philip M Armstrong
- Department of Entomology and Center for Vector Biology & Zoonotic Diseases, The Connecticut Agricultural Experiment Station, New Haven, CT, USA
| | - Theodore G Andreadis
- Department of Entomology and Center for Vector Biology & Zoonotic Diseases, The Connecticut Agricultural Experiment Station, New Haven, CT, USA
| | - Goudarz Molaei
- Department of Entomology and Center for Vector Biology & Zoonotic Diseases, The Connecticut Agricultural Experiment Station, New Haven, CT, USA
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, CT, USA
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Cintra AM, Noda-Nicolau NM, Soman MLDO, Affonso PHDA, Valente GT, Grotto RMT. The Main Arboviruses and Virus Detection Methods in Vectors: Current Approaches and Future Perspectives. Pathogens 2025; 14:416. [PMID: 40430737 PMCID: PMC12114347 DOI: 10.3390/pathogens14050416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2025] [Revised: 04/16/2025] [Accepted: 04/23/2025] [Indexed: 05/29/2025] Open
Abstract
Arthropod-borne viruses (arboviruses) represent a growing concern for global public and veterinary health, with cases reported across all continents. This review presents a broad overview of the geographic distribution of arboviruses transmitted by insect vectors, emphasizing the importance of early viral detection as a cornerstone of surveillance and outbreak preparedness. Special attention is given to the phenomenon of zoonotic spillover, where viruses maintained in natural transmission cycles often involving wildlife reservoirs and arthropod vectors cross into human populations, triggering emergent or re-emergent outbreaks. This article discusses key arboviral families of medical and veterinary significance, including Togaviridae, Flaviviridae, Nairoviridae, Phenuiviridae, Peribunyaviridae, and Orthomyxoviridae, highlighting their molecular and structural characteristics. These features are essential for guiding the development and implementation of specific and sensitive detection strategies. In addition, this work provides a comparative analysis of diverse laboratory methodologies for viral detection in vectors. From serological assays and viral isolation to advanced molecular tools and next-generation sequencing, we explore their principles, practical applications, and context-dependent advantages and limitations. By compiling this information, we aim to support researchers and public health professionals in selecting the most appropriate tools for vector surveillance, ultimately contributing to improved response strategies in the face of arboviral threats.
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Affiliation(s)
- Amanda Montezano Cintra
- Multiuser Central Laboratory, School of Agricultural Sciences, São Paulo State University (UNESP), Botucatu 18618-687, Brazil; (A.M.C.); (N.M.N.-N.); (M.L.d.O.S.); (P.H.d.A.A.)
| | - Nathália Mayumi Noda-Nicolau
- Multiuser Central Laboratory, School of Agricultural Sciences, São Paulo State University (UNESP), Botucatu 18618-687, Brazil; (A.M.C.); (N.M.N.-N.); (M.L.d.O.S.); (P.H.d.A.A.)
| | - Milena Leite de Oliveira Soman
- Multiuser Central Laboratory, School of Agricultural Sciences, São Paulo State University (UNESP), Botucatu 18618-687, Brazil; (A.M.C.); (N.M.N.-N.); (M.L.d.O.S.); (P.H.d.A.A.)
| | - Pedro Henrique de Andrade Affonso
- Multiuser Central Laboratory, School of Agricultural Sciences, São Paulo State University (UNESP), Botucatu 18618-687, Brazil; (A.M.C.); (N.M.N.-N.); (M.L.d.O.S.); (P.H.d.A.A.)
| | - Guilherme Targino Valente
- Clinical Hospital of School Medicine of São Paulo State University, São Paulo State University (UNESP), Botucatu 18618-970, Brazil;
| | - Rejane Maria Tommasini Grotto
- Multiuser Central Laboratory, School of Agricultural Sciences, São Paulo State University (UNESP), Botucatu 18618-687, Brazil; (A.M.C.); (N.M.N.-N.); (M.L.d.O.S.); (P.H.d.A.A.)
- Clinical Hospital of School Medicine of São Paulo State University, São Paulo State University (UNESP), Botucatu 18618-970, Brazil;
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Fay RL, Cruz-Loya M, Maffei JG, Mordecai EA, Ciota AT. Temperature influences West Nile virus evolution and adaptation. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2025:2025.02.28.640855. [PMID: 40093049 PMCID: PMC11908156 DOI: 10.1101/2025.02.28.640855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/19/2025]
Abstract
West Nile virus (WNV), the most common mosquito-borne disease in the continental U.S., is vectored by Culex spp. mosquitoes. Since its introduction to New York State (NYS) in 1999, WNV has become endemic. NYS temperatures have risen by 0.14°C per decade since 1900, with larger increases linked to higher WNV transmission. Using surveillance and sequencing data, we find a significant correlation between rising temperatures, increased WNV genetic diversity, and higher prevalence. Given the experimentally demonstrated role of temperature influencing WNV fitness, we hypothesized that contemporary strains should exhibit greater fitness in mosquitoes at higher temperatures compared to historic strains. To test this, we analyzed genetically distinct WNV strains from mosquitoes collected during recent warm summers (2017 and 2018) and cooler historic summers (2003 and 2004). Assessing Culex pipiens vector competence and calculating the relative R₀ at 20°C, 24°C, and 28°C, we found that contemporary strains exhibit higher transmission potential at increased temperatures. Our results show that contemporary WNV strains possess greater phenotypic and genotypic diversity, facilitating the emergence of strains with enhanced transmission potential in a warming climate.
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Abbasi M, Yousefi S. Assessing insecticide susceptibility of Culex pipiens linnaeus (Diptera: Culicidae) in the Aras River basin: implications for disease control. BMC Infect Dis 2025; 25:247. [PMID: 39984826 PMCID: PMC11844047 DOI: 10.1186/s12879-025-10647-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2024] [Accepted: 02/14/2025] [Indexed: 02/23/2025] Open
Abstract
BACKGROUND Culex pipiens, the common house mosquito, is the main vector of important medical and veterinary diseases including West Nile fever. This disease is a neglected mosquito-borne disease in Iran, where migratory and resident birds act as the main reservoirs and human and horse act as dead-end hosts of the disease. The Aras River basin is identified as a high-risk area for West Nile fever outbreaks. Chemical vector control stands out as a key method for managing mosquito-borne diseases. So, it is necessary to evaluate the susceptibility of Cx. pipiens to insecticides recommended by the World Health Organization (WHO) in this region in order to control possible outbreaks of the diseases. METHODS Specimens were collected from various mosquito larvae breeding places in five villages along the Aras river basin that are politically separated but their agricultural fields are located close to each other. Detailed descriptions of the physical characteristics of each breeding site were recorded and documented. Susceptibility tests were carried out on adult mosquitoes according to WHO guidelines, utilizing five insecticides including DDT 4%, permethrin 0.75%, bendiocarb 0.1%, deltamethrin 0.05%, and malathion 5%. RESULTS The larval habitats were characterized as permanent, sunny areas with algae and vegetation, primarily consisting of muddy substrate and rice fields. The results of susceptibility tests showed that the Cx. pipiens mosquitoes were resistant to bendiocarb 0.1% and DDT 4% but were sensitive to malathion 5%. The results for the pyrethroid insecticides varied, with sensitivity to permethrin 0.75% and resistance to deltamethrin 0.05% (based on WHO guideline, with replicated tests). CONCLUSION Paddy fields serve as suitable biotopes for Cx. pipiens and some species of migratory birds, facilitating cohabitation and breeding. This close proximity of vectors and disease reservoirs increases the likelihood of West Nile fever outbreaks. Mosquito resistance to insecticides can lead to the failure of disease prevention and control programs. It seems that the agrochemical used in agroecosystems is the main cause of these resistances. Regional agricultural departments must regulate the use of agrochemicals to mitigate resistance in mosquito populations.
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Affiliation(s)
- Madineh Abbasi
- Infectious and Tropical Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.
| | - Saideh Yousefi
- Department of Public Health, Sirjan School of Medical Sciences, Sirjan, Iran.
- Student Research Committee, Sirjan School of Medical Sciences, Sirjan, Iran.
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Rochlin I, Kenney J, Little E, Molaei G. Public health significance of the white-tailed deer (Odocoileus virginianus) and its role in the eco-epidemiology of tick- and mosquito-borne diseases in North America. Parasit Vectors 2025; 18:43. [PMID: 39915849 PMCID: PMC11803971 DOI: 10.1186/s13071-025-06674-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2024] [Accepted: 01/17/2025] [Indexed: 02/09/2025] Open
Abstract
White-tailed deer (Odocoileus virginianus) are a ubiquitous species in North America. Their high reproductive potential leads to rapid population growth, and they exhibit a wide range of biological adaptations that influence their interactions with vectors and pathogens. This review aims to characterize the intricate interplay between white-tailed deer and the transmission cycles of various tick- and mosquito-borne pathogens across their range in the eastern United States and southeastern Canada. The first part offers insights into the biological characteristics of white-tailed deer, their population dynamics, and the consequential impacts on both the environment and public health. This contextual backdrop sets the stage for the two subsequent sections, which delve into specific examples of pathogen transmission involving white-tailed deer categorized by tick and mosquito vectors into tick-borne and mosquito-borne diseases. This classification is essential, as ticks and mosquitoes serve as pivotal elements in the eco-epidemiology of vector-borne diseases, intricately linking hosts, the environment, and pathogens. Through elucidating these associations, this paper highlights the crucial role of white-tailed deer in the transmission dynamics of tick- and mosquito-borne diseases. Understanding the interactions between white-tailed deer, vectors, and pathogens is essential for effective disease management and public health interventions.
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Affiliation(s)
| | - Joan Kenney
- Centers for Disease Control and Prevention, Fort Collins, CO, USA
| | - Eliza Little
- Connecticut Department of Public Health, Hartford, CT, USA
| | - Goudarz Molaei
- Connecticut Agricultural Experiment Station, New Haven, CT, USA.
- Yale Uinversity, New Haven, CT, USA.
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Orru' S, Reissinger A, Filomena A, Heitmann A, Funk MB, Schmidt-Chanasit J, Kreß J, Scheiblauer H, Cadar D, Fiedler SA. Assessment of the effectiveness of West Nile virus screening by analysing suspected positive donations among blood donors, Germany, 2020 to 2023. Euro Surveill 2025; 30:2400373. [PMID: 40017391 PMCID: PMC11869365 DOI: 10.2807/1560-7917.es.2025.30.8.2400373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2024] [Accepted: 09/19/2024] [Indexed: 03/01/2025] Open
Abstract
BackgroundThe first autochthonous human West Nile virus (WNV)-positive cases in Germany were confirmed in 2019. Risk minimisation measures (RMM) were introduced in 2020; no WNV transfusion-transmitted infections have been reported to date.AimTo analyse German suspected WNV-positive blood donations during annual seasons 2020-23 to review donor testing requirements.MethodsWNV look-back procedures were initiated as per German regulations and additional donor data were collected. Blood samples were analysed by metagenomic next-generation sequencing (mNGS), individual donor nucleic acid amplification technique (ID-NAT)-based testing and antibody (Ab) testing.ResultsSeventy-four cases were followed up after WNV-positive donor mini-pool screening. Forty-five (83%) of 54 samples tested with the cobas WNV assay and 14 (29%) of 49 samples tested with the RealStar WNV assay showed a reactive ID-NAT-based result; the viral load ranged between 70,251 IU/mL and values below quantification limits. Fifteen (23%) of 64 samples serologically tested were reactive with at least one of the three Ab tests performed; the previous WNV-negative donation was nearly always documented > 28 days before. Of 73 samples sequenced, mNGS detected WNV in 26 (36%) and other flaviviruses in 14 (19%) cases.ConclusionIn some suspected cases where a WNV infection was not confirmed, mNGS demonstrated a cross-reaction with other flaviviruses. Ab testing could only detect WNV in late stages of infection. A NAT-based WNV donor screening with a detection limit of at least 120 IU/mL seems to be a sufficiently effective RMM at present. However, a continuous re-evaluation of test strategy is always required.
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Affiliation(s)
- Stefano Orru'
- Division of Safety of Biomedicines and Diagnostics, Paul-Ehrlich-Institut, Langen, Germany
| | | | - Angela Filomena
- Testing Laboratory for In Vitro Diagnostics, Paul-Ehrlich-Institut, Langen, Germany
| | - Anna Heitmann
- Department of Arbovirology and Entomology, National Reference Center for Tropical Infectious Pathogens, Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany
| | - Markus Benedikt Funk
- Division of Safety of Biomedicines and Diagnostics, Paul-Ehrlich-Institut, Langen, Germany
| | - Jonas Schmidt-Chanasit
- Faculty of Mathematics, Informatics and Natural Sciences, University of Hamburg, Hamburg, Germany
- Department of Arbovirology and Entomology, National Reference Center for Tropical Infectious Pathogens, Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany
| | - Julia Kreß
- Section of Molecular Virology, Paul-Ehrlich-Institut, Langen, Germany
| | - Heinrich Scheiblauer
- Testing Laboratory for In Vitro Diagnostics, Paul-Ehrlich-Institut, Langen, Germany
| | - Dániel Cadar
- Department of Arbovirology and Entomology, National Reference Center for Tropical Infectious Pathogens, Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany
| | - Sarah Anna Fiedler
- Division of Safety of Biomedicines and Diagnostics, Paul-Ehrlich-Institut, Langen, Germany
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Magallanes S, Llorente F, Ruiz-López MJ, la Puente JMD, Ferraguti M, Gutiérrez-López R, Soriguer R, Aguilera-Sepúlveda P, Fernández-Delgado R, Jímenez-Clavero MÁ, Figuerola J. Warm winters are associated to more intense West Nile virus circulation in southern Spain. Emerg Microbes Infect 2024; 13:2348510. [PMID: 38686545 PMCID: PMC11073421 DOI: 10.1080/22221751.2024.2348510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Accepted: 04/23/2024] [Indexed: 05/02/2024]
Abstract
West Nile virus (WNV) is the most widely distributed mosquito-borne flavivirus in the world. This flavivirus can infect humans causing in some cases a fatal neurological disease and birds are the main reservoir hosts. WNV is endemic in Spain, and human cases have been reported since 2004. Although different studies analyse how climatic conditions can affect the dynamics of WNV infection, very few use long-term datasets. Between 2003 and 2020 a total of 2,724 serum samples from 1,707 common coots (Fulica atra) were analysed for the presence of WNV-specific antibodies. Mean (SD) annual seroprevalence was 24.67% (0.28) but showed high year-to-year variations ranging from 5.06% (0.17) to 68.89% (0.29). Significant positive correlations (p < 0.01) were observed between seroprevalence and maximum winter temperature and mean spring temperature. The unprecedented WNV outbreak in humans in the south of Spain in 2020 was preceded by a prolonged period of escalating WNV local circulation. Given current global and local climatic trends, WNV circulation is expected to increase in the next decades. This underscores the necessity of implementing One Health approaches to reduce the risk of future WNV outbreaks in humans. Our results suggest that higher winter and spring temperatures may be used as an early warning signal of more intense WNV circulation among wildlife in Spain, and consequently highlight the need of more intense vector control and surveillance in human inhabited areas.
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Affiliation(s)
- Sergio Magallanes
- Department of Conservation Biology and Global Change, Estación Biológica de Doñana (EBD), CSIC, Seville, Spain
- CIBER of Epidemiology and Public Health (CIBERESP), Madrid, Spain
| | - Francisco Llorente
- Centro de Investigación en Sanidad Animal (CISA-INIA), CSIC, Valdeolmos, Spain
| | - María José Ruiz-López
- Department of Conservation Biology and Global Change, Estación Biológica de Doñana (EBD), CSIC, Seville, Spain
- CIBER of Epidemiology and Public Health (CIBERESP), Madrid, Spain
| | - Josué Martínez-de la Puente
- Department of Conservation Biology and Global Change, Estación Biológica de Doñana (EBD), CSIC, Seville, Spain
- CIBER of Epidemiology and Public Health (CIBERESP), Madrid, Spain
- Department of Parasitology, University of Granada, Granada, Spain
| | - Martina Ferraguti
- Department of Conservation Biology and Global Change, Estación Biológica de Doñana (EBD), CSIC, Seville, Spain
- CIBER of Epidemiology and Public Health (CIBERESP), Madrid, Spain
| | - Rafael Gutiérrez-López
- Centro Nacional de Microbiología, Instituto de Salud Carlos III, Majadahonda, Madrid, Spain
- CIBER of Infectious Diseases (CIBERINFEC), Madrid, Spain
| | - Ramón Soriguer
- Department of Conservation Biology and Global Change, Estación Biológica de Doñana (EBD), CSIC, Seville, Spain
- CIBER of Epidemiology and Public Health (CIBERESP), Madrid, Spain
| | | | | | - Miguel Ángel Jímenez-Clavero
- CIBER of Epidemiology and Public Health (CIBERESP), Madrid, Spain
- Centro de Investigación en Sanidad Animal (CISA-INIA), CSIC, Valdeolmos, Spain
| | - Jordi Figuerola
- Department of Conservation Biology and Global Change, Estación Biológica de Doñana (EBD), CSIC, Seville, Spain
- CIBER of Epidemiology and Public Health (CIBERESP), Madrid, Spain
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10
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Khaledian M, Owliaee I, Sazmand A, Davari B, Zahirnia AH, Jalilian FA. West Nile virus in adults and larvae of Culiseta longiareolata and Culex hortensis (Diptera: Culicidae) captured in Hamedan, western Iran. Acta Trop 2024; 260:107434. [PMID: 39413896 DOI: 10.1016/j.actatropica.2024.107434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2024] [Revised: 09/14/2024] [Accepted: 10/13/2024] [Indexed: 10/18/2024]
Abstract
West Nile virus (WNV) is an emerging arbovirus transmitted by mosquitoes. Although it is considered the most widespread mosquito-borne arbovirus in Iran, vectors of this zoonotic pathogen remain unknown in many regions. This study aimed to assess the presence of WNV in mosquitoes collected in the western city of Hamedan in 2022. Adult mosquitoes were captured using light traps, and mosquito larvae were collected by dipping technique from 45 diverse habitats, including urban, suburban, and rural sites. Specimens were identified and pooled into 69 batches based on their species for viral RNA extraction and Real-Time PCR. In total, 3243 mosquitoes (2209 larvae and 1034 adults) were captured and identified as Culiseta longiareolata, Culex hortensis, Anopheles maculipennis s.l., Culex theileri, Culex pipiens, Anopheles claviger, and Anopheles superpictus s.l. in decreasing order. Molecular screening revealed seven WNV-positive pools of Culiseta longiareolata and Culex hortensis in rural (n = 5) and urban areas (n = 2). Detection of WNV RNA indicates active circulation in mosquitoes and risk of transmission to humans and animals in Hamadan. These findings identify putative vectors in Hamadan, though vectors likely vary regionally in Iran. Further surveillance is needed to elucidate local WNV epidemiology and transmission dynamics fully. Nonetheless, this study provides important baseline evidence of WNV activity to guide prevention strategies in this area.
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Affiliation(s)
- Mehran Khaledian
- Department of Medical Entomology, Faculty of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran.
| | - Iman Owliaee
- Department of Medical Virology, Faculty of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran.
| | - Alireza Sazmand
- Department of Pathobiology, Faculty of Veterinary Medicine, Bu-Ali Sina University, Hamedan 6517658978, Iran.
| | - Behroz Davari
- Department of Medical Entomology, Faculty of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran.
| | - Amir Hossein Zahirnia
- Department of Medical Entomology, Faculty of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran.
| | - Farid Azizi Jalilian
- Department of Medical Virology, Faculty of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran; Molecular Medicine Research Center, Hamadan University of Medical Sciences, Hamadan, Iran.
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11
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Angelou A, Schuh L, Stilianakis NI, Mourelatos S, Kioutsioukis I. Unveiling spatial patterns of West Nile virus emergence in northern Greece, 2010-2023. One Health 2024; 19:100888. [PMID: 39290643 PMCID: PMC11406245 DOI: 10.1016/j.onehlt.2024.100888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2024] [Revised: 09/03/2024] [Accepted: 09/03/2024] [Indexed: 09/19/2024] Open
Abstract
The Region of Central Macedonia (RCM) in Northern Greece recorded the highest number of human West Nile virus (WNV) infections in Greece, despite considerable local mosquito control actions. We examined spatial patterns and associations of mosquito levels, infected mosquito levels, and WNV human cases (WNVhc) across the municipalities of this region over the period 2010-2023 and linked it with climatic characteristics. We combined novel entomological and available epidemiological and climate data for the RCM, aggregated at the municipality level and used Local and Global Moran's I index to assess spatial associations of mosquito levels, infected mosquito levels, and WNVhc. We identified areas with strong interdependencies between adjacent municipalities in the Western part of the region. Furthermore, we employed a Generalized Linear Mixed Model to first, identify the factors driving the observed levels of mosquitoes, infected mosquitoes and WNVhc and second, estimate the influence of climatic features on the observed levels. This modeling approach indicates a strong dependence of the mosquito levels on the temperatures in winter and spring and the total precipitation in early spring, while virus circulation relies on the temperatures of late spring and summer. Our findings highlight the significant influence of climatic factors on mosquito populations (∼60 % explained variance) and the incidence of WNV human cases (∼40 % explained variance), while the unexplained ∼40 % of the variance suggests that targeted interventions and enhanced surveillance in identified hot-spots can enhance public health response.
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Affiliation(s)
| | - Lea Schuh
- European Commission, Joint Research Centre (JRC), Ispra, Italy
| | - Nikolaos I Stilianakis
- European Commission, Joint Research Centre (JRC), Ispra, Italy
- Department of Biometry and Epidemiology, University of Erlangen-Nuremberg, Erlangen, Germany
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12
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Peterson AJ, Hall RA, Harrison JJ, Hobson-Peters J, Hugo LE. Unleashing Nature's Allies: Comparing the Vertical Transmission Dynamics of Insect-Specific and Vertebrate-Infecting Flaviviruses in Mosquitoes. Viruses 2024; 16:1499. [PMID: 39339975 PMCID: PMC11437461 DOI: 10.3390/v16091499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2024] [Revised: 09/13/2024] [Accepted: 09/18/2024] [Indexed: 09/30/2024] Open
Abstract
Insect-specific viruses (ISVs) include viruses that are restricted to the infection of mosquitoes and are spread mostly through transovarial transmission. Despite using a distinct mode of transmission, ISVs are often phylogenetically related to arthropod-borne viruses (arboviruses) that are responsible for human diseases and able to infect both mosquitoes and vertebrates. ISVs can also induce a phenomenon called "superinfection exclusion", whereby a primary ISV infection in an insect inhibits subsequent viral infections of the insect. This has sparked interest in the use of ISVs for the control of pathogenic arboviruses transmitted by mosquitoes. In particular, insect-specific flaviviruses (ISFs) have been shown to inhibit infection of vertebrate-infecting flaviviruses (VIFs) both in vitro and in vivo. This has shown potential as a new and ecologically friendly biological approach to the control of arboviral disease. For this intervention to have lasting impacts for biological control, it is imperative that ISFs are maintained in mosquito populations with high rates of vertical transmission. Therefore, these strategies will need to optimise vertical transmission of ISFs in order to establish persistently infected mosquito lines for sustainable arbovirus control. This review compares recent observations of vertical transmission of arboviral and insect-specific flaviviruses and potential determinants of transovarial transmission rates to understand how the vertical transmission of ISFs may be optimised for effective arboviral control.
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Affiliation(s)
- Alyssa J Peterson
- Mosquito Control Laboratory, QIMR Berghofer Medical Research Institute, Herston, QLD 4006, Australia
- School of Chemistry and Molecular Biosciences, The University of Queensland, St. Lucia, QLD 4072, Australia
| | - Roy A Hall
- School of Chemistry and Molecular Biosciences, The University of Queensland, St. Lucia, QLD 4072, Australia
- Australian Infectious Diseases Research Centre, Brisbane, QLD 4072, Australia
| | - Jessica J Harrison
- School of Chemistry and Molecular Biosciences, The University of Queensland, St. Lucia, QLD 4072, Australia
| | - Jody Hobson-Peters
- School of Chemistry and Molecular Biosciences, The University of Queensland, St. Lucia, QLD 4072, Australia
- Australian Infectious Diseases Research Centre, Brisbane, QLD 4072, Australia
| | - Leon E Hugo
- Mosquito Control Laboratory, QIMR Berghofer Medical Research Institute, Herston, QLD 4006, Australia
- Australian Infectious Diseases Research Centre, Brisbane, QLD 4072, Australia
- School of Biomedical Sciences, The University of Queensland, St. Lucia, QLD 4072, Australia
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13
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Frías M, Caballero-Gómez J, Vázquez A, Madrigal E, Ruiz-Fons F, Gallo M, Herrero L, Jarilla M, García-Bocanegra I, Rivero ARJA. Serosurvey of Blood Donors to Assess West Nile Virus Exposure, South-Central Spain. Emerg Infect Dis 2024; 30:1496-1498. [PMID: 38916587 PMCID: PMC11210648 DOI: 10.3201/eid3007.240450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/26/2024] Open
Abstract
We analyzed West Nile Virus (WNV) exposure from 1,222 blood donors during 2017-2018 from an area of south-central Spain. Results revealed WNV seroprevalence of 0.08% (95% CI 0.004%-0.4%) in this population. Our findings underscore the need for continued surveillance and research to manage WNV infection in this region.
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14
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Koch RT, Erazo D, Folly AJ, Johnson N, Dellicour S, Grubaugh ND, Vogels CB. Genomic epidemiology of West Nile virus in Europe. One Health 2024; 18:100664. [PMID: 38193029 PMCID: PMC10772404 DOI: 10.1016/j.onehlt.2023.100664] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Accepted: 12/12/2023] [Indexed: 01/10/2024] Open
Abstract
West Nile virus is one of the most widespread mosquito-borne zoonotic viruses, with unique transmission dynamics in various parts of the world. Genomic surveillance has provided important insights in the global patterns of West Nile virus emergence and spread. In Europe, multiple West Nile virus lineages have been isolated, with lineage 1a and 2 being the main lineages responsible for human infections. In contrast to North America, where a single introduction of lineage 1a resulted in the virus establishing itself in a new continent, at least 13 introductions of lineages 1a and 2 have occurred into Europe, which is likely a vast underestimation of the true number of introductions. Historically, lineage 1a was the main lineage circulating in Europe, but since the emergence of lineage 2 in the early 2000s, the latter has become the predominant lineage. This shift in West Nile virus lineage prevalence has been broadly linked to the expansion of the virus into northerly temperate regions, where autochthonous cases in animals and humans have been reported in Germany and The Netherlands. Here, we discuss how genomic analysis has increased our understanding of the epidemiology of West Nile virus in Europe, and we present a global Nextstrain build consisting of publicly available West Nile virus genomes (https://nextstrain.org/community/grubaughlab/WNV-Global). Our results elucidate recent insights in West Nile virus lineage dynamics in Europe, and discuss how expanded programs can fill current genomic surveillance gaps.
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Affiliation(s)
- R. Tobias Koch
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, CT, USA
| | - Diana Erazo
- Spatial Epidemiology Lab (SpELL), Université Libre de Bruxelles, Brussels, Belgium
| | - Arran J. Folly
- Vector-Borne Diseases, Virology Department, Animal and Plant Health Agency, Woodham Lane, Addlestone, Surrey, UK
| | - Nicholas Johnson
- Vector-Borne Diseases, Virology Department, Animal and Plant Health Agency, Woodham Lane, Addlestone, Surrey, UK
| | - Simon Dellicour
- Spatial Epidemiology Lab (SpELL), Université Libre de Bruxelles, Brussels, Belgium
- Department of Microbiology, Immunology and Transplantation, Rega Institute, Laboratory for Clinical and Epidemiological Virology, KU Leuven, Leuven, Belgium
| | - Nathan D. Grubaugh
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, CT, USA
- Department of Ecology and Evolutionary Biology, Yale University, New Haven, CT, USA
- Yale Institute for Global Health, Yale University, New Haven, CT, USA
- Public Health Modeling Unit, Yale School of Public Health, New Haven, CT, United States of America
| | - Chantal B.F. Vogels
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, CT, USA
- Yale Institute for Global Health, Yale University, New Haven, CT, USA
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15
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Wang HR, Liu T, Gao X, Wang HB, Xiao JH. Impact of climate change on the global circulation of West Nile virus and adaptation responses: a scoping review. Infect Dis Poverty 2024; 13:38. [PMID: 38790027 PMCID: PMC11127377 DOI: 10.1186/s40249-024-01207-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Accepted: 05/17/2024] [Indexed: 05/26/2024] Open
Abstract
BACKGROUND West Nile virus (WNV), the most widely distributed flavivirus causing encephalitis globally, is a vector-borne pathogen of global importance. The changing climate is poised to reshape the landscape of various infectious diseases, particularly vector-borne ones like WNV. Understanding the anticipated geographical and range shifts in disease transmission due to climate change, alongside effective adaptation strategies, is critical for mitigating future public health impacts. This scoping review aims to consolidate evidence on the impact of climate change on WNV and to identify a spectrum of applicable adaptation strategies. MAIN BODY We systematically analyzed research articles from PubMed, Web of Science, Scopus, and EBSCOhost. Our criteria included English-language research articles published between 2007 and 2023, focusing on the impacts of climate change on WNV and related adaptation strategies. We extracted data concerning study objectives, populations, geographical focus, and specific findings. Literature was categorized into two primary themes: 1) climate-WNV associations, and 2) climate change impacts on WNV transmission, providing a clear understanding. Out of 2168 articles reviewed, 120 met our criteria. Most evidence originated from North America (59.2%) and Europe (28.3%), with a primary focus on human cases (31.7%). Studies on climate-WNV correlations (n = 83) highlighted temperature (67.5%) as a pivotal climate factor. In the analysis of climate change impacts on WNV (n = 37), most evidence suggested that climate change may affect the transmission and distribution of WNV, with the extent of the impact depending on local and regional conditions. Although few studies directly addressed the implementation of adaptation strategies for climate-induced disease transmission, the proposed strategies (n = 49) fell into six categories: 1) surveillance and monitoring (38.8%), 2) predictive modeling (18.4%), 3) cross-disciplinary collaboration (16.3%), 4) environmental management (12.2%), 5) public education (8.2%), and 6) health system readiness (6.1%). Additionally, we developed an accessible online platform to summarize the evidence on climate change impacts on WNV transmission ( https://2xzl2o-neaop.shinyapps.io/WNVScopingReview/ ). CONCLUSIONS This review reveals that climate change may affect the transmission and distribution of WNV, but the literature reflects only a small share of the global WNV dynamics. There is an urgent need for adaptive responses to anticipate and respond to the climate-driven spread of WNV. Nevertheless, studies focusing on these adaptation responses are sparse compared to those examining the impacts of climate change. Further research on the impacts of climate change and adaptation strategies for vector-borne diseases, along with more comprehensive evidence synthesis, is needed to inform effective policy responses tailored to local contexts.
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Affiliation(s)
- Hao-Ran Wang
- Department of Veterinary Surgery, Northeast Agricultural University, Harbin, 150030, Heilongjiang, People's Republic of China
- Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, Heilongjiang, People's Republic of China
| | - Tao Liu
- Department of Veterinary Surgery, Northeast Agricultural University, Harbin, 150030, Heilongjiang, People's Republic of China
- Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, Heilongjiang, People's Republic of China
| | - Xiang Gao
- Department of Veterinary Surgery, Northeast Agricultural University, Harbin, 150030, Heilongjiang, People's Republic of China
- Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, Heilongjiang, People's Republic of China
| | - Hong-Bin Wang
- Department of Veterinary Surgery, Northeast Agricultural University, Harbin, 150030, Heilongjiang, People's Republic of China
- Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, Heilongjiang, People's Republic of China
| | - Jian-Hua Xiao
- Department of Veterinary Surgery, Northeast Agricultural University, Harbin, 150030, Heilongjiang, People's Republic of China.
- Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, Heilongjiang, People's Republic of China.
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16
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Girl P, Euringer K, Coroian M, Mihalca AD, Borde JP, Dobler G. Comparison of Five Serological Methods for the Detection of West Nile Virus Antibodies. Viruses 2024; 16:788. [PMID: 38793670 PMCID: PMC11126072 DOI: 10.3390/v16050788] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2024] [Revised: 05/09/2024] [Accepted: 05/14/2024] [Indexed: 05/26/2024] Open
Abstract
The West Nile Virus (WNV), a member of the family Flaviviridae, is an emerging mosquito-borne flavivirus causing potentially severe infections in humans and animals involving the central nervous system (CNS). Due to its emerging tendency, WNV now occurs in many areas where other flaviviruses are co-occurring. Cross-reactive antibodies with flavivirus infections or vaccination (e.g., tick-borne encephalitis virus (TBEV), Usutu virus (USUV), yellow fever virus (YFV), dengue virus (DENV), Japanese encephalitis virus (JEV)) therefore remain a major challenge in diagnosing flavivirus infections. Virus neutralization tests are considered as reference tests for the detection of specific flavivirus antibodies, but are elaborate, time-consuming and need biosafety level 3 facilities. A simple and straightforward assay for the differentiation and detection of specific WNV IgG antibodies for the routine laboratory is urgently needed. In this study, we compared two commercially available enzyme-linked immunosorbent assays (anti-IgG WNV ELISA and anti-NS1-IgG WNV), a commercially available indirect immunofluorescence assay, and a newly developed in-house ELISA for the detection of WNV-NS1-IgG antibodies. All four tests were compared to an in-house NT to determine both the sensitivity and specificity of the four test systems. None of the assays could match the specificity of the NT, although the two NS1-IgG based ELISAs were very close to the specificity of the NT at 97.3% and 94.6%. The in-house WNV-NS1-IgG ELISA had the best performance regarding sensitivity and specificity. The specificities of the ELISA assays and the indirect immunofluorescence assays could not meet the necessary specificity and/or sensitivity.
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Affiliation(s)
- Philipp Girl
- Bundeswehr Institute of Microbiology, 80937 Munich, Germany; (P.G.); (K.E.); (G.D.)
- Central Institute of the Bundeswehr Medical Service Munich, 85748 Garching, Germany
- Institute for Infectious Diseases and Zoonoses, Department of Veterinary Sciences, Faculty of Veterinary Medicine, LMU Munich, 80539 Munich, Germany
| | - Kathrin Euringer
- Bundeswehr Institute of Microbiology, 80937 Munich, Germany; (P.G.); (K.E.); (G.D.)
- Division of Infectious Diseases, Department of Medicine II, University Medical Centre Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg im Breisgau, Germany
| | - Mircea Coroian
- Department of Parasitology and Parasitic Diseases, University of Agricultural Sciences and Veterinary Medicine of Cluj-Napoca, 400372 Cluj-Napoca, Romania; (M.C.); (A.D.M.)
| | - Andrei Daniel Mihalca
- Department of Parasitology and Parasitic Diseases, University of Agricultural Sciences and Veterinary Medicine of Cluj-Napoca, 400372 Cluj-Napoca, Romania; (M.C.); (A.D.M.)
| | - Johannes P. Borde
- Division of Infectious Diseases, Department of Medicine II, University Medical Centre Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg im Breisgau, Germany
- Praxis Prof. Borde and Kollegen, 77704 Oberkirch, Germany
| | - Gerhard Dobler
- Bundeswehr Institute of Microbiology, 80937 Munich, Germany; (P.G.); (K.E.); (G.D.)
- Department of Infectious Diseases and Tropical Medicine, LMU Center of Medicine, 80336 Munich, Germany
- Department of Parasitology, University of Hohenheim, 70599 Stuttgart, Germany
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17
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Fonzo M, Bertoncello C, Tudor L, Miccolis L, Serpentino M, Petta D, Amoruso I, Baldovin T, Trevisan A. Do we protect ourselves against West Nile Virus? A systematic review on knowledge, attitudes, and practices and their determinants. J Infect Public Health 2024; 17:868-880. [PMID: 38555655 DOI: 10.1016/j.jiph.2024.03.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 03/01/2024] [Accepted: 03/11/2024] [Indexed: 04/02/2024] Open
Abstract
BACKGROUND West Nile virus (WNV) is a mosquito-borne flavivirus. In humans, 80% of infections are asymptomatic, while approximately 20% experience influenza-like symptoms. Fewer than 1% develop the neuroinvasive form which can lead to encephalitis, meningitis, acute flaccid paralysis, and even death. The global spread of the virus to areas where it was not previously present has become a growing concern. Since the 2000 s, there have been numerous outbreaks affecting local and travelling populations worldwide. Given the lack of a vaccine, preventative measures are primarily focused on surveillance, vector control, and the use of personal protective behaviours (PPBs). The importance of PPBs is central to public health recommendations. However, translating these messages into coherent action by the public can prove challenging, as the uptake of such measures is inevitably influenced by socio-economic factors, awareness, knowledge, and risk perception. METHODS A PRISMA-based systematic research was conducted on EMBASE, PubMed/MEDLINE, and Web of Science databases. PROSPERO registration number CRD42023459714. Quality of studies included in the final stage was evaluated using the Critical Appraisal Checklist for Cross-Sectional Study (CEBMa). RESULTS 2963 articles were screened, and 17 studies were included in the final round. Out of these, six were deemed of high quality, ten were of medium quality, and one was of low quality. In almost all studies considered, both awareness and knowledge of WNV transmission were above 90%, while concern about WNV ranged from 50% to 80%. Concern about the safety of repellents, either with or without DEET, ranged from 27% to 70%. The percentage of people actually using repellents ranged from 30% to 75%, with the lowest usage reported among individuals over 60 years old (29%) and pregnant women (33%), and the highest among students aged 9-11 (75%). Concern for West Nile Virus (WNV) was consistently linked to an increase in taking preventative measures, including the use of repellents, by two to four times across studies. The school-based intervention was effective in increasing the practice of removing standing water (AOR=4.6; 2.7-8.0) and wearing long clothing (AOR=2.4; 95%CI: 1.3-4.3), but did not have a significant impact on the use of repellents. CONCLUSIONS The present systematic review provides an overview of the knowledge, attitudes, and practices (KAP) of WNV and their determinants. While concern about West Nile Virus (WNV) and its effects can be a significant motivator, it is important to promote evidence-based personal protective behaviours (PPBs) to counter unwarranted fears. For example, the use of repellents among the most vulnerable age groups. Given the geographical expansion of WNV, it is necessary to target the entire population preventively, including those who are difficult to reach and areas not yet endemic. The findings of this investigation could have significant implications for public health and support well-informed and effective communication strategies and interventions.
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Affiliation(s)
- Marco Fonzo
- Hygiene and Public Health Unit, Department of Cardiac Thoracic Vascular Sciences and Public Health, University of Padova, Padova, Italy
| | - Chiara Bertoncello
- Hygiene and Public Health Unit, Department of Cardiac Thoracic Vascular Sciences and Public Health, University of Padova, Padova, Italy.
| | - Liliana Tudor
- Hygiene and Public Health Unit, Department of Cardiac Thoracic Vascular Sciences and Public Health, University of Padova, Padova, Italy
| | - Liana Miccolis
- Hygiene and Public Health Unit, Department of Cardiac Thoracic Vascular Sciences and Public Health, University of Padova, Padova, Italy
| | - Michele Serpentino
- Hygiene and Public Health Unit, Department of Cardiac Thoracic Vascular Sciences and Public Health, University of Padova, Padova, Italy
| | - Daniele Petta
- Hygiene and Public Health Unit, Department of Cardiac Thoracic Vascular Sciences and Public Health, University of Padova, Padova, Italy
| | - Irene Amoruso
- Hygiene and Public Health Unit, Department of Cardiac Thoracic Vascular Sciences and Public Health, University of Padova, Padova, Italy
| | - Tatjana Baldovin
- Hygiene and Public Health Unit, Department of Cardiac Thoracic Vascular Sciences and Public Health, University of Padova, Padova, Italy
| | - Andrea Trevisan
- Hygiene and Public Health Unit, Department of Cardiac Thoracic Vascular Sciences and Public Health, University of Padova, Padova, Italy
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18
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Bohers C, Vazeille M, Bernaoui L, Pascalin L, Meignan K, Mousson L, Jakerian G, Karch A, de Lamballerie X, Failloux AB. Aedes albopictus is a competent vector of five arboviruses affecting human health, greater Paris, France, 2023. Euro Surveill 2024; 29:2400271. [PMID: 38757289 PMCID: PMC11100294 DOI: 10.2807/1560-7917.es.2024.29.20.2400271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2024] [Accepted: 05/16/2024] [Indexed: 05/18/2024] Open
Abstract
Aedes albopictus collected in 2023 in the greater Paris area (Île-de-France) were experimentally able to transmit five arboviruses: West Nile virus from 3 days post-infection (dpi), chikungunya virus and Usutu virus from 7 dpi, dengue virus and Zika virus from 21 dpi. Given the growing number of imported dengue cases reported in early 2024 in France, surveillance of Ae. albopictus should be reinforced during the Paris Olympic Games in July, when many international visitors including from endemic countries are expected.
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Affiliation(s)
- Chloé Bohers
- Institut Pasteur, Université Paris Cité, Arboviruses and Insect Vectors, Paris, France
| | - Marie Vazeille
- Institut Pasteur, Université Paris Cité, Arboviruses and Insect Vectors, Paris, France
| | - Lydia Bernaoui
- Institut Pasteur, Université Paris Cité, Arboviruses and Insect Vectors, Paris, France
| | | | - Kevin Meignan
- Agence Régionale de Démoustication, Rosny-sous-Bois, France
| | - Laurence Mousson
- Institut Pasteur, Université Paris Cité, Arboviruses and Insect Vectors, Paris, France
| | | | - Anaïs Karch
- Agence Régionale de Démoustication, Rosny-sous-Bois, France
| | - Xavier de Lamballerie
- National Reference Center for Arboviruses, Inserm-IRBA, Marseille, France
- Unité des Virus Émergents (UVE: Aix-Marseille Univ, Università di Corsica, IRD 190, Inserm 1207, IRBA), Marseille, France
| | - Anna-Bella Failloux
- Institut Pasteur, Université Paris Cité, Arboviruses and Insect Vectors, Paris, France
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19
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Windah ALL, Tallei TE, AlShehail BM, Suoth EJ, Fatimawali, Alhashem YN, Halwani MA, AlShakhal MM, Aljeldah M, Alissa M, Alsuwat MA, Almanaa TN, Alshehri AA, Rabaan AA. Immunoinformatics-Driven Strategies for Advancing Epitope-Based Vaccine Design for West Nile Virus. J Pharm Sci 2024; 113:906-917. [PMID: 38042341 DOI: 10.1016/j.xphs.2023.11.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Revised: 11/26/2023] [Accepted: 11/27/2023] [Indexed: 12/04/2023]
Abstract
The West Nile virus (WNV) is the causative agent of West Nile disease (WND), which poses a potential risk of meningitis or encephalitis. The aim of the study was to design an epitope-based vaccine for WNV by utilizing computational analyses. The epitope-based vaccine design process encompassed WNV sequence collection, phylogenetic tree construction, and sequence alignment. Computational models identified B-cell and T-cell epitopes, followed by immunological property analysis. Epitopes were then modeled and docked with B-cell receptors, MHC I, and MHC II. Molecular dynamics simulations further explored dynamic interactions between epitopes and receptors. The findings indicated that the B-cell epitope QINHHWHKSGSSIG, along with three T-cell epitopes (FLVHREWFM for MHC I, NPFVSVATANAKVLI for MHC II, and NAYYVMTVGTKTFLV for MHC II), successfully passed the immunological evaluations. These four epitopes were further subjected to docking and molecular dynamics simulation studies. Although each demonstrated favorable affinities with their respective receptors, only NAYYVMTVGTKTFLV displayed a stable interaction with MHC II during MDS analysis, hence emerging as a potential candidate for a WNV epitope-based vaccine. This study demonstrates a comprehensive approach to epitope vaccine design, combining computational analyses, molecular modeling, and simulation techniques to identify potential vaccine candidates for WNV.
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Affiliation(s)
- Axl Laurens Lukas Windah
- Department of Chemistry, Faculty of Science and Technology, Universitas Airlangga, Surabaya 60115, East Java, Indonesia
| | - Trina Ekawati Tallei
- Department of Biology, Faculty of Mathematics and Natural Sciences, Sam Ratulangi University, Manado 95115, North Sulawesi, Indonesia.
| | - Bashayer M AlShehail
- Pharmacy Practice Department, College of Clinical Pharmacy, Imam Abdulrahman Bin Faisal University, Dammam 31441, Saudi Arabia
| | - Elly Juliana Suoth
- Pharmacy Study Program, Faculty of Mathematics and Natural Sciences, Sam Ratulangi University, Mana-do 95115, North Sulawesi, Indonesia
| | - Fatimawali
- Pharmacy Study Program, Faculty of Mathematics and Natural Sciences, Sam Ratulangi University, Mana-do 95115, North Sulawesi, Indonesia
| | - Yousef N Alhashem
- Clinical Laboratory Science Department, Mohammed Al-Mana College for Medical Sciences, Dammam 34222, Saudi Arabia
| | - Muhammad A Halwani
- Department of Medical Microbiology, Faculty of Medicine, Al Baha University. Al Baha 4781, Saudi Arabia
| | - Mouayd M AlShakhal
- Internal Medicine Department, Qatif Central Hospital, Qatif 32654, Saudi Arabia
| | - Mohammed Aljeldah
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, University of Hafr Al Batin, Hafr Al Batin 39831, Saudi Arabia
| | - Mohammed Alissa
- Department of Medical Laboratory Sciences, College of Applied Medical Sciences, Prince Sattam bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia
| | - Meshari A Alsuwat
- Clinical Laboratory Sciences Department, College of Applied Medical Sciences, Taif University, Al-Taif 21974, Saudi Arabia
| | - Taghreed N Almanaa
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Ahmad A Alshehri
- Department of Clinical Laboratory Sciences, Faculty of Applied Medical Sciences, Najran University, Najran 61441, Saudi Arabia
| | - Ali A Rabaan
- Molecular Diagnostic Laboratory, Johns Hopkins Aramco Healthcare, Dhahran 31311, Saudi Arabia; College of Medicine, Alfaisal University, Riyadh 11533, Saudi Arabia; Department of Public Health and Nutrition, The University of Haripur, Haripur 22610, Pakistan
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20
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Wan G, Allen J, Ge W, Rawlani S, Uelmen J, Mainzer LS, Smith RL. Two-step light gradient boosted model to identify human west nile virus infection risk factor in Chicago. PLoS One 2024; 19:e0296283. [PMID: 38181002 PMCID: PMC10769082 DOI: 10.1371/journal.pone.0296283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Accepted: 12/08/2023] [Indexed: 01/07/2024] Open
Abstract
West Nile virus (WNV), a flavivirus transmitted by mosquito bites, causes primarily mild symptoms but can also be fatal. Therefore, predicting and controlling the spread of West Nile virus is essential for public health in endemic areas. We hypothesized that socioeconomic factors may influence human risk from WNV. We analyzed a list of weather, land use, mosquito surveillance, and socioeconomic variables for predicting WNV cases in 1-km hexagonal grids across the Chicago metropolitan area. We used a two-stage lightGBM approach to perform the analysis and found that hexagons with incomes above and below the median are influenced by the same top characteristics. We found that weather factors and mosquito infection rates were the strongest common factors. Land use and socioeconomic variables had relatively small contributions in predicting WNV cases. The Light GBM handles unbalanced data sets well and provides meaningful predictions of the risk of epidemic disease outbreaks.
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Affiliation(s)
- Guangya Wan
- National Center for Supercomputing Applications, University of Illinois, Urbana-Champaign, Illinois, United States of America
- Department of Statistics, University of Illinois, Urbana-Champaign, Illinois, United States of America
| | - Joshua Allen
- National Center for Supercomputing Applications, University of Illinois, Urbana-Champaign, Illinois, United States of America
| | - Weihao Ge
- National Center for Supercomputing Applications, University of Illinois, Urbana-Champaign, Illinois, United States of America
| | - Shubham Rawlani
- National Center for Supercomputing Applications, University of Illinois, Urbana-Champaign, Illinois, United States of America
- Information School, University of Illinois, Urbana-Champaign, Illinois, United States of America
| | - John Uelmen
- Department of Pathobiology, University of Illinois, Urbana-Champaign, Illinois, United States of America
| | - Liudmila Sergeevna Mainzer
- National Center for Supercomputing Applications, University of Illinois, Urbana-Champaign, Illinois, United States of America
- Car R. Woese Institute for Genomic Biology, University of Illinois, Urbana-Champaign, Illinois, United States of America
| | - Rebecca Lee Smith
- National Center for Supercomputing Applications, University of Illinois, Urbana-Champaign, Illinois, United States of America
- Department of Pathobiology, University of Illinois, Urbana-Champaign, Illinois, United States of America
- Car R. Woese Institute for Genomic Biology, University of Illinois, Urbana-Champaign, Illinois, United States of America
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21
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Athanasakopoulou Z, Sofia M, Skampardonis V, Giannakopoulos A, Birtsas P, Tsolakos K, Spyrou V, Chatzopoulos DC, Satra M, Diamantopoulos V, Mpellou S, Galamatis D, G. Papatsiros V, Billinis C. Indication of West Nile Virus (WNV) Lineage 2 Overwintering among Wild Birds in the Regions of Peloponnese and Western Greece. Vet Sci 2023; 10:661. [PMID: 37999484 PMCID: PMC10674244 DOI: 10.3390/vetsci10110661] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2023] [Revised: 11/05/2023] [Accepted: 11/08/2023] [Indexed: 11/25/2023] Open
Abstract
West Nile virus (WNV), a zoonotic mosquito-borne virus, has recently caused human outbreaks in Europe, including Greece. Its transmission cycle in nature includes wild birds as amplifying hosts and ornithophilic mosquito vectors. The aim of this study was to assess WNV circulation among wild birds from two regions of Greece, Peloponnese and Western Greece, during 2022. To this end, a total of 511 birds belonging to 37 different species were sampled and molecularly screened. WNV RNA was detected from February to November in a total of 71 wild birds of nine species originating from both investigated regions. The first eight positive samples were sequenced on a part of NS3 and, according to the phylogenetic analysis, they belonged to evolutionary lineage 2 and presented similarity to previous outbreak-causing Greek strains (Argolis 2017, Macedonia 2010 and 2012). It was more likely to identify a PCR positive bird as the population density and the distance from water sources decreased. The present report provides evidence of WNV occurrence in both Peloponnese and Western Greece during 2022 and underlines its possible overwintering, highlighting the need for avian species surveillance to be conducted annually and throughout the year. Magpies are proposed as sentinels for WNV monitoring.
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Affiliation(s)
- Zoi Athanasakopoulou
- Faculty of Veterinary Science, University of Thessaly, 43100 Karditsa, Greece; (Z.A.); (M.S.); (V.S.); (A.G.)
| | - Marina Sofia
- Faculty of Veterinary Science, University of Thessaly, 43100 Karditsa, Greece; (Z.A.); (M.S.); (V.S.); (A.G.)
| | - Vassilis Skampardonis
- Faculty of Veterinary Science, University of Thessaly, 43100 Karditsa, Greece; (Z.A.); (M.S.); (V.S.); (A.G.)
| | - Alexios Giannakopoulos
- Faculty of Veterinary Science, University of Thessaly, 43100 Karditsa, Greece; (Z.A.); (M.S.); (V.S.); (A.G.)
| | - Periklis Birtsas
- Faculty of Forestry, Wood Science and Design, 43100 Karditsa, Greece;
| | | | - Vassiliki Spyrou
- Faculty of Animal Science, University of Thessaly, 41110 Larissa, Greece; (V.S.); (D.G.)
| | - Dimitris C. Chatzopoulos
- Faculty of Public and One Health, University of Thessaly, 43100 Karditsa, Greece; (D.C.C.); (M.S.)
| | - Maria Satra
- Faculty of Public and One Health, University of Thessaly, 43100 Karditsa, Greece; (D.C.C.); (M.S.)
| | | | - Spyridoula Mpellou
- Bioefarmoges Eleftheriou LP-Integrated Mosquito Control, 19007 Marathon, Greece;
| | - Dimitrios Galamatis
- Faculty of Animal Science, University of Thessaly, 41110 Larissa, Greece; (V.S.); (D.G.)
| | - Vasileios G. Papatsiros
- Clinic of Medicine, Faculty of Veterinary Medicine, University of Thessaly, 43100 Karditsa, Greece;
| | - Charalambos Billinis
- Faculty of Veterinary Science, University of Thessaly, 43100 Karditsa, Greece; (Z.A.); (M.S.); (V.S.); (A.G.)
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22
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Kobayashi S, Kawakami R, Takeda C, Maezono K, Thammahakin P, Eguchi H, Hang'ombe BM, Orba Y, Sawa H, Yoshii K, Kariwa H. Ubiquitin accumulation induced by the finger and palm sub-domains of NS5 modulates the replication of West Nile virus. Virology 2023; 588:109902. [PMID: 37856911 DOI: 10.1016/j.virol.2023.109902] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 09/26/2023] [Accepted: 10/02/2023] [Indexed: 10/21/2023]
Abstract
West Nile virus (WNV) causes encephalitis in human and animals. WNV is phylogenetically classified into at least five distinct genetic lineages with different pathogenicity. The pathogenesis of West Nile encephalitis is affected by ubiquitin accumulation in infected cells, but the mechanism is unknown. In this study, the association between ubiquitin accumulation and WNV pathogenicity was investigated. Ubiquitin accumulation was detected in cells infected with NY99 strain belonging to lineage-1, but not FCG and Zmq16 strains belonging to lineage-2. Substitution of the Finger and Palm sub-domains of NS5 from lineage-1 to -2 decreased ubiquitin accumulation and viral replication. Furthermore, the survival rate was increased, and viral replication and ubiquitin accumulation in the brain were attenuated, in mice inoculated with the substituted WNV compared with lineage-1 WNV. Therefore, the intracellular ubiquitin accumulation induced by the Finger and Palm sub-domains of NS5 is linked to the differences in pathogenicity among WNV lineages.
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Affiliation(s)
- Shintaro Kobayashi
- Laboratory of Public Health, Hokkaido University, N18, W9, Kita-ku, Sapporo, 060-0818, Japan; Institute for Vaccine Research and Development (HU-IVReD), Hokkaido University, Hokkaido, Japan.
| | - Ryoko Kawakami
- Laboratory of Public Health, Hokkaido University, N18, W9, Kita-ku, Sapporo, 060-0818, Japan
| | - Chisaki Takeda
- Laboratory of Public Health, Hokkaido University, N18, W9, Kita-ku, Sapporo, 060-0818, Japan
| | - Keisuke Maezono
- Laboratory of Public Health, Hokkaido University, N18, W9, Kita-ku, Sapporo, 060-0818, Japan
| | - Passawat Thammahakin
- Laboratory of Public Health, Hokkaido University, N18, W9, Kita-ku, Sapporo, 060-0818, Japan
| | - Haruto Eguchi
- Laboratory of Public Health, Hokkaido University, N18, W9, Kita-ku, Sapporo, 060-0818, Japan
| | - Bernard M Hang'ombe
- Department of Para-Clinical Studies, School of Veterinary Medicine, The University of Zambia, P.O. Box 32379, Lusaka, 10101, Zambia; Africa Center of Excellence for Infectious Diseases of Humans and Animals, The University of Zambia, P.O. Box 32379, Lusaka, 10101, Zambia
| | - Yasuko Orba
- Institute for Vaccine Research and Development (HU-IVReD), Hokkaido University, Hokkaido, Japan; Division of Molecular Pathobiology, International Institute for Zoonosis Control, N20, W10, Kita-ku, Sapporo, 001-0020, Japan; One Health Research Center, Hokkaido University, Hokkaido, Japan; International Collaboration Unit, International Institute for Zoonosis Control, Hokkaido University, Hokkaido, Japan
| | - Hirofumi Sawa
- Institute for Vaccine Research and Development (HU-IVReD), Hokkaido University, Hokkaido, Japan; Division of Molecular Pathobiology, International Institute for Zoonosis Control, N20, W10, Kita-ku, Sapporo, 001-0020, Japan; One Health Research Center, Hokkaido University, Hokkaido, Japan; International Collaboration Unit, International Institute for Zoonosis Control, Hokkaido University, Hokkaido, Japan; Global Virus Network, Baltimore, MD, USA
| | - Kentaro Yoshii
- Laboratory of Public Health, Hokkaido University, N18, W9, Kita-ku, Sapporo, 060-0818, Japan; National Research Center for the Control and Prevention of Infectious diseases (CCPID), Nagasaki University, Nagasaki, Japan
| | - Hiroaki Kariwa
- Laboratory of Public Health, Hokkaido University, N18, W9, Kita-ku, Sapporo, 060-0818, Japan
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23
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Holcomb KM, Nguyen C, Komar N, Foy BD, Panella NA, Baskett ML, Barker CM. Predicted reduction in transmission from deployment of ivermectin-treated birdfeeders for local control of West Nile virus. Epidemics 2023; 44:100697. [PMID: 37348378 PMCID: PMC10529638 DOI: 10.1016/j.epidem.2023.100697] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Revised: 05/01/2023] [Accepted: 06/12/2023] [Indexed: 06/24/2023] Open
Abstract
Ivermectin (IVM)-treated birds provide the potential for targeted control of Culex mosquitoes to reduce West Nile virus (WNV) transmission. Ingestion of IVM increases mosquito mortality, which could reduce WNV transmission from birds to humans and in enzootic maintenance cycles affecting predominantly bird-feeding mosquitoes and from birds to humans. This strategy might also provide an alternative method for WNV control that is less hampered by insecticide resistance and the logistics of large-scale pesticide applications. Through a combination of field studies and modeling, we assessed the feasibility and impact of deploying IVM-treated birdfeed in residential neighborhoods to reduce WNV transmission. We first tracked 105 birds using radio telemetry and radio frequency identification to monitor their feeder usage and locations of nocturnal roosts in relation to five feeder sites in a neighborhood in Fort Collins, Colorado. Using these results, we then modified a compartmental model of WNV transmission to account for the impact of IVM on mosquito mortality and spatial movement of birds and mosquitoes on the neighborhood level. We found that, while the number of treated lots in a neighborhood strongly influenced the total transmission potential, the arrangement of treated lots in a neighborhood had little effect. Increasing the proportion of treated birds, regardless of the WNV competency status, resulted in a larger reduction in infection dynamics than only treating competent birds. Taken together, model results indicate that deployment of IVM-treated feeders could reduce local transmission throughout the WNV season, including reducing the enzootic transmission prior to the onset of human infections, with high spatial coverage and rates of IVM-induced mortality in mosquitoes. To improve predictions, more work is needed to refine estimates of daily mosquito movement in urban areas and rates of IVM-induced mortality. Our results can guide future field trials of this control strategy.
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Affiliation(s)
- Karen M Holcomb
- Davis Arbovirus Research and Training Laboratory, Department of Pathology, Microbiology, and Immunology, School of Veterinary Medicine, University of California, Davis, CA, United States.
| | - Chilinh Nguyen
- Center for Vector-Borne Infectious Diseases, Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, CO, United States; Arboviral Diseases Branch, Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, Fort Collins, CO, United States
| | - Nicholas Komar
- Arboviral Diseases Branch, Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, Fort Collins, CO, United States
| | - Brian D Foy
- Center for Vector-Borne Infectious Diseases, Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, CO, United States
| | - Nicholas A Panella
- Arboviral Diseases Branch, Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, Fort Collins, CO, United States
| | - Marissa L Baskett
- Department of Environmental Science and Policy, University of California, Davis, CA, United States
| | - Christopher M Barker
- Davis Arbovirus Research and Training Laboratory, Department of Pathology, Microbiology, and Immunology, School of Veterinary Medicine, University of California, Davis, CA, United States.
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24
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Caldwell HS, Kuo L, Pata JD, Dupuis AP, Arnold JJ, Yeager C, Stout J, Koetzner CA, Payne AF, Bialosuknia SM, Banker EM, Nolen TA, Cameron CE, Ciota AT. Maintenance of a host-specific minority mutation in the West Nile virus NS3. iScience 2023; 26:107468. [PMID: 37593454 PMCID: PMC10428113 DOI: 10.1016/j.isci.2023.107468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 06/22/2023] [Accepted: 07/21/2023] [Indexed: 08/19/2023] Open
Abstract
West Nile virus (WNV), the most prevalent arthropod-borne virus (arbovirus) in the United States, is maintained in a cycle between Culex spp. mosquitoes and birds. Arboviruses exist within hosts and vectors as a diverse set of closely related genotypes. In theory, this genetic diversity can facilitate adaptation to distinct environments during host cycling, yet host-specific fitness of minority genotypes has not been assessed. Utilizing WNV deep-sequencing data, we previously identified a naturally occurring, mosquito-biased substitution, NS3 P319L. Using both cell culture and experimental infection in natural hosts, we demonstrated that this substitution confers attenuation in vertebrate hosts and increased transmissibility by mosquitoes. Biochemical assays demonstrated temperature-sensitive ATPase activity consistent with host-specific phenotypes. Together these data confirm the maintenance of host-specific minority variants in arbovirus mutant swarms, suggest a unique role for NS3 in viral fitness, and demonstrate that intrahost sequence data can inform mechanisms of host-specific adaptation.
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Affiliation(s)
- Haley S. Caldwell
- The Arbovirus Laboratory, Wadsworth Center, New York State Department of Health, Slingerlands, NY 12159, USA
- Department of Biomedical Sciences, State University of New York at Albany, School of Public Health, Rensselaer, NY 12144, USA
| | - Lili Kuo
- The Arbovirus Laboratory, Wadsworth Center, New York State Department of Health, Slingerlands, NY 12159, USA
| | - Janice D. Pata
- Department of Biomedical Sciences, State University of New York at Albany, School of Public Health, Rensselaer, NY 12144, USA
- Wadsworth Center, New York State Department of Health, Albany, NY 12208, USA
| | - Alan P. Dupuis
- The Arbovirus Laboratory, Wadsworth Center, New York State Department of Health, Slingerlands, NY 12159, USA
| | - Jamie J. Arnold
- Department of Microbiology and Immunology, University of North Carolina School of Medicine, Chapel Hill, NC 27599, USA
| | - Calvin Yeager
- Department of Microbiology and Immunology, University of North Carolina School of Medicine, Chapel Hill, NC 27599, USA
| | - Jessica Stout
- The Arbovirus Laboratory, Wadsworth Center, New York State Department of Health, Slingerlands, NY 12159, USA
| | - Cheri A. Koetzner
- The Arbovirus Laboratory, Wadsworth Center, New York State Department of Health, Slingerlands, NY 12159, USA
| | - Anne F. Payne
- The Arbovirus Laboratory, Wadsworth Center, New York State Department of Health, Slingerlands, NY 12159, USA
| | - Sean M. Bialosuknia
- The Arbovirus Laboratory, Wadsworth Center, New York State Department of Health, Slingerlands, NY 12159, USA
| | - Elyse M. Banker
- The Arbovirus Laboratory, Wadsworth Center, New York State Department of Health, Slingerlands, NY 12159, USA
| | - Taylor A. Nolen
- The Arbovirus Laboratory, Wadsworth Center, New York State Department of Health, Slingerlands, NY 12159, USA
| | - Craig E. Cameron
- Department of Microbiology and Immunology, University of North Carolina School of Medicine, Chapel Hill, NC 27599, USA
| | - Alexander T. Ciota
- The Arbovirus Laboratory, Wadsworth Center, New York State Department of Health, Slingerlands, NY 12159, USA
- Department of Biomedical Sciences, State University of New York at Albany, School of Public Health, Rensselaer, NY 12144, USA
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25
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Niczyporuk JS, Kozdrun W, Czujkowska A, Blanchard Y, Helle M, Dheilly NM, Gonzalez G. West Nile Virus Lineage 2 in Free-Living Corvus cornix Birds in Poland. Trop Med Infect Dis 2023; 8:417. [PMID: 37624355 PMCID: PMC10459098 DOI: 10.3390/tropicalmed8080417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Revised: 08/10/2023] [Accepted: 08/11/2023] [Indexed: 08/26/2023] Open
Abstract
The summer temperatures recorded in Poland in 2022 were among the highest in over 30 years and, combined with higher-than-expected rainfall, gave the impression of an almost tropical climate. Such climatic conditions were ideal for the transmission of vector-borne zoonotic diseases such as West Nile fever. In northeastern Poland, in the Mazowieckie region, the Polish event-based surveillance network reported increased fatalities of free-living hooded crows (Corvus corone cornix). West Nile virus (WNV) lineage 2 was identified for the first time as the etiological agent responsible for the death of the birds. WNV was detected in 17 out of the 99 (17.17%) free-living birds tested in this study. All the WNV-infected dead birds were collected in the same area and were diagnosed in September by the NVRI and confirmed by the EURL for equine diseases, ANSES, in October 2022. Unnaturally high temperatures recorded in Poland in 2022 likely favored the infection and spread of the virus in the avian population. A nationwide alert and awareness raising of blood transfusion centers and hospitals was carried out to prevent human infections by WNV.
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Affiliation(s)
- Jowita S. Niczyporuk
- National Veterinary Research Institute Pulawy (NVRI), Department of Poultry Diseases, Al. Partyzantow 57, 24-100 Pulawy, Poland
| | - Wojciech Kozdrun
- National Veterinary Research Institute Pulawy (NVRI), Department of Poultry Diseases, Al. Partyzantow 57, 24-100 Pulawy, Poland
| | - Agnieszka Czujkowska
- Rehabilitation Center for Protected National Birds “Bird Asylum”, Av. Ratuszowa 1/3, 03-461 Warszawa, Poland;
| | - Yannick Blanchard
- Génétique Virale et Biosécurité, French Agency for Food, Environmental and Occupational Health & Safety (ANSES), Laboratoire de Ploufragan-Plouzané-Niort, Université de Rennes 1, 22440 Ploufragan, France;
| | - Mariteragi Helle
- ANSES, INRAE, Ecole Nationale Vétérinaire d’Alfort, UMR VIROLOGIE, Laboratoire de Santé Animale, 14 rue Pierre et Marie Curie, 94701 Maisons-Alfort, France (N.M.D.)
| | - Nolwenn M. Dheilly
- ANSES, INRAE, Ecole Nationale Vétérinaire d’Alfort, UMR VIROLOGIE, Laboratoire de Santé Animale, 14 rue Pierre et Marie Curie, 94701 Maisons-Alfort, France (N.M.D.)
| | - Gaelle Gonzalez
- ANSES, INRAE, Ecole Nationale Vétérinaire d’Alfort, UMR VIROLOGIE, Laboratoire de Santé Animale, 14 rue Pierre et Marie Curie, 94701 Maisons-Alfort, France (N.M.D.)
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26
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Russell MC, Rappazzo KM, Hoffman JC. Ecological Degradation and the Risk of Mosquito-Borne Disease in the Great Lakes Basin. ECOHEALTH 2023; 20:150-155. [PMID: 37488439 PMCID: PMC11236328 DOI: 10.1007/s10393-023-01646-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 04/26/2023] [Accepted: 04/27/2023] [Indexed: 07/26/2023]
Affiliation(s)
- Marie C Russell
- Oak Ridge Institute for Science and Education (ORISE) hosted by Center for Public Health & Environmental Assessment, Office of Research and Development, US Environmental Protection Agency, Research Triangle Park, NC 27711, 104 Mason Farm Road, Chapel Hill, NC, 27514, USA.
| | - Kristen M Rappazzo
- Center for Public Health and Environmental Assessment, Office of Research and Development, US Environmental Protection Agency, Research Triangle Park, NC, 27711, USA
| | - Joel C Hoffman
- Center for Computational Toxicology and Exposure, Office of Research and Development, US Environmental Protection Agency, Duluth, MN, 55804, USA
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27
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Diagne MM, Ndione MHD, Mencattelli G, Diallo A, Ndiaye EH, Di Domenico M, Diallo D, Kane M, Curini V, Top NM, Marcacci M, Mbanne M, Ancora M, Secondini B, Di Lollo V, Teodori L, Leone A, Puglia I, Gaye A, Sall AA, Loucoubar C, Rosà R, Diallo M, Monaco F, Faye O, Cammà C, Rizzoli A, Savini G, Faye O. Novel Amplicon-Based Sequencing Approach to West Nile Virus. Viruses 2023; 15:1261. [PMID: 37376561 DOI: 10.3390/v15061261] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 05/14/2023] [Accepted: 05/17/2023] [Indexed: 06/29/2023] Open
Abstract
West Nile virus is a re-emerging arbovirus whose impact on public health is increasingly important as more and more epidemics and epizootics occur, particularly in America and Europe, with evidence of active circulation in Africa. Because birds constitute the main reservoirs, migratory movements allow the diffusion of various lineages in the world. It is therefore crucial to properly control the dispersion of these lineages, especially because some have a greater health impact on public health than others. This work describes the development and validation of a novel whole-genome amplicon-based sequencing approach to West Nile virus. This study was carried out on different strains from lineage 1 and 2 from Senegal and Italy. The presented protocol/approach showed good coverage using samples derived from several vertebrate hosts and may be valuable for West Nile genomic surveillance.
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Affiliation(s)
| | | | - Giulia Mencattelli
- Istituto Zooprofilattico Sperimentale dell'Abruzzo e del Molise, 64100 Teramo, Italy
- Centre Agriculture Food Environment, University of Trento, 38010 San Michele all'Adige, Italy
- Research and Innovation Centre, Fondazione Edmund Mach, 38010 San Michele all'Adige, Italy
| | - Amadou Diallo
- Epidemiology, Clinical Research and Data Science Department, Institut Pasteur de Dakar, Dakar BP220, Senegal
| | - El Hadji Ndiaye
- Medical Zoology Department, Institut Pasteur de Dakar, Dakar BP220, Senegal
| | - Marco Di Domenico
- Istituto Zooprofilattico Sperimentale dell'Abruzzo e del Molise, 64100 Teramo, Italy
| | - Diawo Diallo
- Medical Zoology Department, Institut Pasteur de Dakar, Dakar BP220, Senegal
| | - Mouhamed Kane
- Virology Department, Institut Pasteur de Dakar, Dakar BP220, Senegal
| | - Valentina Curini
- Istituto Zooprofilattico Sperimentale dell'Abruzzo e del Molise, 64100 Teramo, Italy
| | - Ndeye Marieme Top
- Epidemiology, Clinical Research and Data Science Department, Institut Pasteur de Dakar, Dakar BP220, Senegal
| | - Maurilia Marcacci
- Istituto Zooprofilattico Sperimentale dell'Abruzzo e del Molise, 64100 Teramo, Italy
| | - Maïmouna Mbanne
- Virology Department, Institut Pasteur de Dakar, Dakar BP220, Senegal
| | - Massimo Ancora
- Istituto Zooprofilattico Sperimentale dell'Abruzzo e del Molise, 64100 Teramo, Italy
| | - Barbara Secondini
- Istituto Zooprofilattico Sperimentale dell'Abruzzo e del Molise, 64100 Teramo, Italy
| | - Valeria Di Lollo
- Istituto Zooprofilattico Sperimentale dell'Abruzzo e del Molise, 64100 Teramo, Italy
| | - Liana Teodori
- Istituto Zooprofilattico Sperimentale dell'Abruzzo e del Molise, 64100 Teramo, Italy
| | - Alessandra Leone
- Istituto Zooprofilattico Sperimentale dell'Abruzzo e del Molise, 64100 Teramo, Italy
| | - Ilaria Puglia
- Istituto Zooprofilattico Sperimentale dell'Abruzzo e del Molise, 64100 Teramo, Italy
| | - Alioune Gaye
- Medical Zoology Department, Institut Pasteur de Dakar, Dakar BP220, Senegal
| | - Amadou Alpha Sall
- Virology Department, Institut Pasteur de Dakar, Dakar BP220, Senegal
| | - Cheikh Loucoubar
- Epidemiology, Clinical Research and Data Science Department, Institut Pasteur de Dakar, Dakar BP220, Senegal
| | - Roberto Rosà
- Centre Agriculture Food Environment, University of Trento, 38010 San Michele all'Adige, Italy
| | - Mawlouth Diallo
- Medical Zoology Department, Institut Pasteur de Dakar, Dakar BP220, Senegal
| | - Federica Monaco
- Istituto Zooprofilattico Sperimentale dell'Abruzzo e del Molise, 64100 Teramo, Italy
| | - Ousmane Faye
- Virology Department, Institut Pasteur de Dakar, Dakar BP220, Senegal
| | - Cesare Cammà
- Istituto Zooprofilattico Sperimentale dell'Abruzzo e del Molise, 64100 Teramo, Italy
| | - Annapaola Rizzoli
- Research and Innovation Centre, Fondazione Edmund Mach, 38010 San Michele all'Adige, Italy
| | - Giovanni Savini
- Istituto Zooprofilattico Sperimentale dell'Abruzzo e del Molise, 64100 Teramo, Italy
| | - Oumar Faye
- Virology Department, Institut Pasteur de Dakar, Dakar BP220, Senegal
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Bakran-Lebl K, Kjær LJ, Conrady B. Predicting Culex pipiens/restuans Population Dynamics Using a Weather-Driven Dynamic Compartmental Population Model. INSECTS 2023; 14:293. [PMID: 36975978 PMCID: PMC10056620 DOI: 10.3390/insects14030293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 03/14/2023] [Accepted: 03/15/2023] [Indexed: 06/18/2023]
Abstract
Mosquitoes of the genus Culex are important vectors of a variety of arthropod-borne viral infections. In most of the northern parts of the USA, Cx. pipiens/restuans is the predominant representative of this genus. As vectors, they play a key role in the spreading of arboviruses and thus, knowledge of the population dynamic of mosquitoes is important to understand the disease ecology of these viruses. As poikilotherm animals, the vital rates of mosquitoes are highly dependent on ambient temperature, and also on precipitation. We present a compartmental model for the population dynamics of Cx. pipiens/restuans. The model is driven by temperature, precipitation, and daytime length (which can be calculated from the geographic latitude). For model evaluation, we used long-term mosquito capture data, which were averaged from multiple sites in Cook County, Illinois. The model fitted the observation data and was able to reproduce between-year differences in the abundance of the Cx. pipiens/restuans mosquitoes, as well as the different seasonal trends. Using this model, we evaluated the effectiveness of targeting different vital rates for mosquito control strategies. The final model is able to reproduce the weekly mean Cx. pipiens/restuans abundance for Cook County with a high accuracy, and over a long time period of 20 years.
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Affiliation(s)
- Karin Bakran-Lebl
- Institute for Medical Microbiology and Hygiene, AGES—Austrian Agency for Health and Food Safety, 1090 Vienna, Austria
| | - Lene Jung Kjær
- Department of Veterinary and Animal Sciences, University of Copenhagen, Frederiksberg Campus, 1870 Copenhagen, Denmark
| | - Beate Conrady
- Department of Veterinary and Animal Sciences, University of Copenhagen, Frederiksberg Campus, 1870 Copenhagen, Denmark
- Complexity Science Hub Vienna, 1080 Vienna, Austria
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Bergmann F, Fischer D, Fischer L, Maisch H, Risch T, Dreyer S, Sadeghi B, Geelhaar D, Grund L, Merz S, Groschup MH, Ziegler U. Vaccination of Zoo Birds against West Nile Virus-A Field Study. Vaccines (Basel) 2023; 11:652. [PMID: 36992236 PMCID: PMC10058624 DOI: 10.3390/vaccines11030652] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 03/07/2023] [Accepted: 03/10/2023] [Indexed: 03/16/2023] Open
Abstract
West Nile virus (WNV) is known to cause disease and death in humans and various animals worldwide. WNV has circulated in Germany since 2018. In 2020, four birds tested positive for the WNV genome at Zoopark Erfurt (Thuringia). Moreover, virus neutralization assays detected neutralizing antibodies (nAb) against WNV in 28 birds. In addition, nAb against WNV and Usutu virus (USUV) were found in 14 birds. To protect valuable animals and to reduce the risk of viral transmission from birds to humans, we performed a field study on WNV vaccination at the zoo. To conduct the study, 61 birds from the zoo were categorized into three groups and subjected to a vaccination regimen, where each bird received either 1.0 mL, 0.5 mL, or 0.3 mL of a commercial inactivated WNV vaccine three times. The vaccinations were administered at three-week intervals, or as per modified vaccination schedules. Furthermore, 52 birds served as non-vaccinated controls. Adverse vaccination reactions were absent. The greatest increase in nAb titres was observed in birds that received 1.0 mL of vaccine. However, pre-existing antibodies to WNV and USUV appeared to have a major effect on antibody development in all groups and in all bird species, whereas sex and age had no effect. After vaccination, no death was detected in vaccinated birds for more than 1 year.
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Affiliation(s)
- Felicitas Bergmann
- Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Institute of Novel and Emerging Infectious Diseases, 17493 Greifswald-Insel Riems, Germany
| | - Dominik Fischer
- Der Gruene Zoo Wuppertal, Hubertusallee 30, 42117 Wuppertal, Germany
| | - Luisa Fischer
- Wildlife Research Institute, State Agency for Nature, Environment and Consumer Protection North Rhine-Westphalia, Puetzchens Chaussee 228, 53229 Bonn, Germany
| | - Heike Maisch
- Thueringer Zoopark Erfurt, Am Zoopark 1, 99087 Erfurt, Germany
| | - Tina Risch
- Thueringer Zoopark Erfurt, Am Zoopark 1, 99087 Erfurt, Germany
| | - Saskia Dreyer
- Der Gruene Zoo Wuppertal, Hubertusallee 30, 42117 Wuppertal, Germany
| | - Balal Sadeghi
- Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Institute of Novel and Emerging Infectious Diseases, 17493 Greifswald-Insel Riems, Germany
| | | | - Lisa Grund
- Der Gruene Zoo Wuppertal, Hubertusallee 30, 42117 Wuppertal, Germany
| | - Sabine Merz
- Thueringer Zoopark Erfurt, Am Zoopark 1, 99087 Erfurt, Germany
| | - Martin H. Groschup
- Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Institute of Novel and Emerging Infectious Diseases, 17493 Greifswald-Insel Riems, Germany
| | - Ute Ziegler
- Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Institute of Novel and Emerging Infectious Diseases, 17493 Greifswald-Insel Riems, Germany
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Laabassi F, Dheilly N, Beck C, Amaral R, Gonzalez G, Gaudaire D, Madeline A, Lecouturier F, Lecollinet S, Zientara S, Hans A, Valle-Casuso JC. Serological evidence of circulation of West Nile virus in equids in Algerian eastern drylands and its epidemiological risk factors. Comp Immunol Microbiol Infect Dis 2023; 94:101947. [PMID: 36638646 DOI: 10.1016/j.cimid.2023.101947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2022] [Revised: 01/07/2023] [Accepted: 01/09/2023] [Indexed: 01/12/2023]
Abstract
In order to determine the prevalence of equine infectious anemia virus (EIAV), Usutu virus (USUV), and West Nile virus (WNV) in eastern Algerian drylands, 340 sera from distinct equids have been collected from 2015 to 2017. Serological analysis for the presence of antibodies against EIAV and flaviviruses was performed using commercially available ELISAs. Sera detected positive, doubtful, or negative close to the doubtful threshold in flavivirus ELISA were tested by the virus neutralization test (VNT), using WNV and USUV strains. The prevalence of WNV antibodies with ELISA was 11.47% (39/340) against 13.53% (46/340) by WNV VNT. EIAV antibodies were not detected in any samples. WNV seroprevalence varies with species, breed and location of horses. Only, one equid was positive for both WNV and USUV neutralizing antibodies. This is the first screening on equids sera of EIAV and USUV in Algeria. This study indicate that WNV and possibly USUV have circulated/are circulating in the Algerian equine population, unlike EIAV does not seem to be present.
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Affiliation(s)
- Farouk Laabassi
- PIAD Research Team, ESPA Laboratory, Department of Veterinary, Institute of Veterinary Sciences and Agronomics Sciences, University of Batna-1, 05000 Batna, Algeria.
| | - Nolwenn Dheilly
- Anses, INRAE, Ecole Nationale Vétérinaire d'Alfort, UMR VIROLOGIE, Animal Health Laboratory, Maisons-Alfort, France.
| | - Cécile Beck
- Anses, INRAE, Ecole Nationale Vétérinaire d'Alfort, UMR VIROLOGIE, Animal Health Laboratory, Maisons-Alfort, France.
| | - Rayane Amaral
- Anses, INRAE, Ecole Nationale Vétérinaire d'Alfort, UMR VIROLOGIE, Animal Health Laboratory, Maisons-Alfort, France.
| | - Gaëlle Gonzalez
- Anses, INRAE, Ecole Nationale Vétérinaire d'Alfort, UMR VIROLOGIE, Animal Health Laboratory, Maisons-Alfort, France.
| | - Delphine Gaudaire
- ANSES-Laboratory for Animal Health in Normandy, Physiopathology and Epidemiology of Equine Diseases Unit, Goustranville, France.
| | - Anthony Madeline
- ANSES-Laboratory for Animal Health in Normandy, Physiopathology and Epidemiology of Equine Diseases Unit, Goustranville, France.
| | - Fanny Lecouturier
- ANSES-Laboratory for Animal Health in Normandy, Physiopathology and Epidemiology of Equine Diseases Unit, Goustranville, France.
| | - Sylvie Lecollinet
- Anses, INRAE, Ecole Nationale Vétérinaire d'Alfort, UMR VIROLOGIE, Animal Health Laboratory, Maisons-Alfort, France.
| | - Stéphan Zientara
- Anses, INRAE, Ecole Nationale Vétérinaire d'Alfort, UMR VIROLOGIE, Animal Health Laboratory, Maisons-Alfort, France.
| | - Aymeric Hans
- ANSES-Laboratory for Animal Health in Normandy, Physiopathology and Epidemiology of Equine Diseases Unit, Goustranville, France.
| | - José-Carlos Valle-Casuso
- ANSES-Laboratory for Animal Health in Normandy, Physiopathology and Epidemiology of Equine Diseases Unit, Goustranville, France.
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Holcomb KM, Mathis S, Staples JE, Fischer M, Barker CM, Beard CB, Nett RJ, Keyel AC, Marcantonio M, Childs ML, Gorris ME, Rochlin I, Hamins-Puértolas M, Ray EL, Uelmen JA, DeFelice N, Freedman AS, Hollingsworth BD, Das P, Osthus D, Humphreys JM, Nova N, Mordecai EA, Cohnstaedt LW, Kirk D, Kramer LD, Harris MJ, Kain MP, Reed EMX, Johansson MA. Evaluation of an open forecasting challenge to assess skill of West Nile virus neuroinvasive disease prediction. Parasit Vectors 2023; 16:11. [PMID: 36635782 PMCID: PMC9834680 DOI: 10.1186/s13071-022-05630-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Accepted: 12/20/2022] [Indexed: 01/13/2023] Open
Abstract
BACKGROUND West Nile virus (WNV) is the leading cause of mosquito-borne illness in the continental USA. WNV occurrence has high spatiotemporal variation, and current approaches to targeted control of the virus are limited, making forecasting a public health priority. However, little research has been done to compare strengths and weaknesses of WNV disease forecasting approaches on the national scale. We used forecasts submitted to the 2020 WNV Forecasting Challenge, an open challenge organized by the Centers for Disease Control and Prevention, to assess the status of WNV neuroinvasive disease (WNND) prediction and identify avenues for improvement. METHODS We performed a multi-model comparative assessment of probabilistic forecasts submitted by 15 teams for annual WNND cases in US counties for 2020 and assessed forecast accuracy, calibration, and discriminatory power. In the evaluation, we included forecasts produced by comparison models of varying complexity as benchmarks of forecast performance. We also used regression analysis to identify modeling approaches and contextual factors that were associated with forecast skill. RESULTS Simple models based on historical WNND cases generally scored better than more complex models and combined higher discriminatory power with better calibration of uncertainty. Forecast skill improved across updated forecast submissions submitted during the 2020 season. Among models using additional data, inclusion of climate or human demographic data was associated with higher skill, while inclusion of mosquito or land use data was associated with lower skill. We also identified population size, extreme minimum winter temperature, and interannual variation in WNND cases as county-level characteristics associated with variation in forecast skill. CONCLUSIONS Historical WNND cases were strong predictors of future cases with minimal increase in skill achieved by models that included other factors. Although opportunities might exist to specifically improve predictions for areas with large populations and low or high winter temperatures, areas with high case-count variability are intrinsically more difficult to predict. Also, the prediction of outbreaks, which are outliers relative to typical case numbers, remains difficult. Further improvements to prediction could be obtained with improved calibration of forecast uncertainty and access to real-time data streams (e.g. current weather and preliminary human cases).
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Affiliation(s)
- Karen M. Holcomb
- Global Systems Laboratory, National Atmospheric and Oceanic Administration, Boulder, CO USA
- Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, Fort Collins, CO USA
| | - Sarabeth Mathis
- Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, Fort Collins, CO USA
| | - J. Erin Staples
- Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, Fort Collins, CO USA
| | - Marc Fischer
- Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, Fort Collins, CO USA
| | - Christopher M. Barker
- Department of Pathology, Microbiology, and Immunology, School of Veterinary Medicine, University of California, Davis, CA USA
| | - Charles B. Beard
- Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, Fort Collins, CO USA
| | - Randall J. Nett
- Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, Fort Collins, CO USA
| | - Alexander C. Keyel
- Division of Infectious Diseases, Wadsworth Center, New York State Department of Health, Albany, NY USA
- Department of Atmospheric and Environmental Sciences, University at Albany, Albany, NY USA
| | - Matteo Marcantonio
- Department of Pathology, Microbiology, and Immunology, School of Veterinary Medicine, University of California, Davis, CA USA
- Evolutionary Ecology and Genetics Group, Earth & Life Institute-UCLouvain, Louvain-La-Neuve, Belgium
| | - Marissa L. Childs
- Emmett Interdisciplinary Program in Environment and Resources, Stanford University, Stanford, CA USA
| | - Morgan E. Gorris
- Information Systems and Modeling, Los Alamos National Laboratory, Los Alamos, NM USA
| | - Ilia Rochlin
- Center for Vector Biology, Rutgers University, New Brunswick, NJ USA
| | | | - Evan L. Ray
- Department of Mathematics and Statistics, Mount Holyoke College, South Hadley, MA USA
| | - Johnny A. Uelmen
- Department of Pathobiology, University of Illinois at Urbana-Champaign, Urbana, IL USA
| | - Nicholas DeFelice
- Department of Environmental Medicine and Public Health, Icahn School of Medicine at Mount Sinai, New York, NY USA
- Department of Global Health, Icahn School of Medicine at Mount Sinai, New York, NY USA
| | - Andrew S. Freedman
- Biomathematics Graduate Program, North Carolina State University, Raleigh, NC USA
| | | | - Praachi Das
- Biomathematics Graduate Program, North Carolina State University, Raleigh, NC USA
| | - Dave Osthus
- Statistical Sciences Group, Los Alamos National Laboratory, Los Alamos, NM USA
| | - John M. Humphreys
- Agricultural Research Service, United States Department of Agriculture, Sidney, MT USA
| | - Nicole Nova
- Department of Biology, Stanford University, Stanford, CA USA
| | | | - Lee W. Cohnstaedt
- National Bio- and Agro-Defense Facility, Agricultural Research Service, United States Department of Agriculture, Manhattan, KS USA
| | - Devin Kirk
- Department of Biology, Stanford University, Stanford, CA USA
| | - Laura D. Kramer
- Division of Infectious Diseases, Wadsworth Center, New York State Department of Health, Albany, NY USA
| | | | - Morgan P. Kain
- Department of Biology, Stanford University, Stanford, CA USA
| | - Emily M. X. Reed
- Invasive Species Working Group, Global Change Center, Fralin Life Sciences Institute, Virginia Tech, Blacksburg, NC USA
| | - Michael A. Johansson
- Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, San Juan, PR USA
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32
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Uelmen JA, Lamcyzk B, Irwin P, Bartlett D, Stone C, Mackay A, Arsenault-Benoit A, Ryan SJ, Mutebi JP, Hamer GL, Fritz M, Smith RL. Human biting mosquitoes and implications for West Nile virus transmission. Parasit Vectors 2023; 16:2. [PMID: 36593496 PMCID: PMC9806905 DOI: 10.1186/s13071-022-05603-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Accepted: 11/30/2022] [Indexed: 01/03/2023] Open
Abstract
BACKGROUND West Nile virus (WNV), primarily vectored by mosquitoes of the genus Culex, is the most important mosquito-borne pathogen in North America, having infected thousands of humans and countless wildlife since its arrival in the USA in 1999. In locations with dedicated mosquito control programs, surveillance methods often rely on frequent testing of mosquitoes collected in a network of gravid traps (GTs) and CO2-baited light traps (LTs). Traps specifically targeting oviposition-seeking (e.g. GTs) and host-seeking (e.g. LTs) mosquitoes are vulnerable to trap bias, and captured specimens are often damaged, making morphological identification difficult. METHODS This study leverages an alternative mosquito collection method, the human landing catch (HLC), as a means to compare sampling of potential WNV vectors to traditional trapping methods. Human collectors exposed one limb for 15 min at crepuscular periods (5:00-8:30 am and 6:00-9:30 pm daily, the time when Culex species are most actively host-seeking) at each of 55 study sites in suburban Chicago, Illinois, for two summers (2018 and 2019). RESULTS A total of 223 human-seeking mosquitoes were caught by HLC, of which 46 (20.6%) were mosquitoes of genus Culex. Of these 46 collected Culex specimens, 34 (73.9%) were Cx. salinarius, a potential WNV vector species not thought to be highly abundant in upper Midwest USA. Per trapping effort, GTs and LTs collected > 7.5-fold the number of individual Culex specimens than HLC efforts. CONCLUSIONS The less commonly used HLC method provides important insight into the complement of human-biting mosquitoes in a region with consistent WNV epidemics. This study underscores the value of the HLC collection method as a complementary tool for surveillance to aid in WNV vector species characterization. However, given the added risk to the collector, novel mitigation methods or alternative approaches must be explored to incorporate HLC collections safely and strategically into control programs.
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Affiliation(s)
- Johnny A. Uelmen
- Department of Pathobiology, College of Veterinary Medicine, University of Illinois at Urbana-Champaign, 3505 Veterinary Medicine Basic Sciences Building, 2001 S. Lincoln Ave, Urbana, IL 61802 USA
| | - Bennett Lamcyzk
- Department of Pathobiology, College of Veterinary Medicine, University of Illinois at Urbana-Champaign, 3505 Veterinary Medicine Basic Sciences Building, 2001 S. Lincoln Ave, Urbana, IL 61802 USA
| | - Patrick Irwin
- Northwest Mosquito Abatement District, 147 W. Hintz Rd, Wheeling, IL 60090 USA
| | - Dan Bartlett
- Northwest Mosquito Abatement District, 147 W. Hintz Rd, Wheeling, IL 60090 USA
| | - Chris Stone
- Illinois Natural History Survey, Prairie Research Institute, University of Illinois at Urbana-Champaign, Forbes Natural History Building, 1816 S. Oak Street, M/C 652, Champaign, IL 61820 USA
| | - Andrew Mackay
- Illinois Natural History Survey, Prairie Research Institute, University of Illinois at Urbana-Champaign, Forbes Natural History Building, 1816 S. Oak Street, M/C 652, Champaign, IL 61820 USA
| | - Arielle Arsenault-Benoit
- Department of Entomology, College of Computer, Mathematical, and Natural Sciences, University of Maryland, 4112 Plant Sciences Building, College Park, MD 20742 USA
| | - Sadie J. Ryan
- Department of Geography, College of Liberal Arts and Sciences, University of Florida, 3141 Turlington Hall, 330 Newell Dr, Gainesville, FL 32611 USA
| | - John-Paul Mutebi
- Division of Vector-Borne Diseases, Arboviral Disease Branch, US Centers for Disease Control and Prevention, 3156 Rampart Rd., Fort Collins, CO 80521 USA
| | - Gabriel L. Hamer
- Department of Entomology. College of Agriculture & Life Sciences, Texas A&M University, TAMU 2475, College Station, TX 77843 USA
| | - Megan Fritz
- Department of Entomology, College of Computer, Mathematical, and Natural Sciences, University of Maryland, 4112 Plant Sciences Building, College Park, MD 20742 USA
| | - Rebecca L. Smith
- Department of Pathobiology, College of Veterinary Medicine, University of Illinois at Urbana-Champaign, 3505 Veterinary Medicine Basic Sciences Building, 2001 S. Lincoln Ave, Urbana, IL 61802 USA
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Abstract
Identifying the mosquitoes responsible for transmitting human disease-causing pathogens is of critical importance for effective control of mosquito-borne outbreaks. West Nile virus is often transferred by adult female mosquitoes in the genus Culex, which deposit eggs in a variety of aquatic habitats throughout the world. Herein we describe several methodological approaches to monitor these species in nature, as well as offering details for data collection and analysis.
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Affiliation(s)
- Donald A Yee
- School of Biological, Environmental, & Earth Sciences, University of Southern Mississippi, Hattiesburg, MS, USA.
| | - Ary Faraji
- Salt Lake City Mosquito Abatement District, Salt Lake City, UT, USA
| | - Ilia Rochlin
- Center for Vector Biology, Rutgers University, New Brunswick, NJ, USA
- Department of Microbiology and Immunology, Center for Infectious Diseases, Stony Brook University, Stony Brook, NY, USA
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Bondo KJ, Montecino‐Latorre D, Williams L, Helwig M, Duren K, Hutchinson ML, Walter WD. Spatial modeling of two mosquito vectors of West Nile virus using integrated nested Laplace approximations. Ecosphere 2023. [DOI: 10.1002/ecs2.4346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Affiliation(s)
- Kristin J. Bondo
- Pennsylvania Cooperative Fish and Wildlife Research Unit The Pennsylvania State University University Park Pennsylvania USA
| | - Diego Montecino‐Latorre
- Pennsylvania Cooperative Fish and Wildlife Research Unit The Pennsylvania State University University Park Pennsylvania USA
| | - Lisa Williams
- Pennsylvania Game Commission, Bureau of Wildlife Management Harrisburg Pennsylvania USA
| | - Matt Helwig
- Pennsylvania Department of Environmental Protection Harrisburg Pennsylvania USA
| | - Kenneth Duren
- Pennsylvania Game Commission, Bureau of Wildlife Management Harrisburg Pennsylvania USA
| | | | - W. David Walter
- U.S. Geological Survey, Pennsylvania Cooperative Fish and Wildlife Research Unit The Pennsylvania State University University Park Pennsylvania USA
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Molchanova EV, Luchinin DN, Machneva AY, Gerasimova AD, Nesgovorova AV, Boroday NV, Plehanova NG, Baturin AА. Competence of mosquitoes <i>Culex pipiens f.</i> molestus as carriers of West Nile virus under various temperature conditions. JOURNAL OF MICROBIOLOGY, EPIDEMIOLOGY AND IMMUNOBIOLOGY 2022. [DOI: 10.36233/0372-9311-287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Introduction. The Culex pipiens mosquito is one of the proven vectors of the West Nile virus (WNV). Culex pipiens f. molestus (Cx. p. f. molestus) is a synanthropic, autogenous, widespread form of the species that can feed on a broad range of hosts, including humans. The temperature of the habitat of insects affects the potential for virus transmission, which determines the likelihood of them carrying the pathogen of West Nile fever.
The goal is an experimental study of the temperature of the habitat of larvae on the competence of mosquitoes Cx. p. f. molestus as carriers of WNV.
Materials and methods. We used a strain of the WNV (WNV_Volg601/18 genotype 2) and a laboratory culture of mosquitoes Cx. p. f. molestus. The concentration of the virus was detected by plaque formation using Vero cells. Insects were infected orally at the larval stage, with subsequent incubation at 20, 22 or 28C. 72 hours after the emergence of all adults from the pupae, the mosquitoes were immobilized by cold, the sex of imago was determined, the salivary glands were isolated from the females, and the presence of WNV in glandes and its titer were detected.
Results. The titer of WNV sufficient to transmit the pathogen through the insect biting was observed in the salivary glands of insects kept at a temperature of 22 and 28C, with the virus titer rising with the temperature increasing. No virus was detected in the salivary glands of female insects kept at a temperature of 20C.
Conclusion. Thus, it appears that the habitat temperature is an important factor limiting the replication and content of WNV in the salivary glands of Cx. p. f. molestus.
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Ndione MHD, Ndiaye EH, Faye M, Diagne MM, Diallo D, Diallo A, Sall AA, Loucoubar C, Faye O, Diallo M, Faye O, Barry MA, Fall G. Re-Introduction of West Nile Virus Lineage 1 in Senegal from Europe and Subsequent Circulation in Human and Mosquito Populations between 2012 and 2021. Viruses 2022; 14:2720. [PMID: 36560724 PMCID: PMC9785585 DOI: 10.3390/v14122720] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Revised: 11/23/2022] [Accepted: 11/25/2022] [Indexed: 12/12/2022] Open
Abstract
West Nile virus (WNV) is a virus of the Japanese encephalitis antigenic complex and belongs to the family Flaviviridae of the genus flavivirus. The virus can cause infection in humans which in most cases is asymptomatic, however symptomatic cases exist and the disease can be severe causing encephalitis and meningoencephalitis. The virus is maintained in an enzootic cycle involving mosquitoes and birds, humans and other mammals such as horses can be accidental hosts. A mosquito-based arbovirus surveillance system and the sentinel syndromic surveillance network (4S) have been in place since 1988 and 2015 respectively, to better understand the transmission dynamics of arboviruses including WNV in Senegal. Arthropod and human samples have been collected from the field and analysed at Institut Pasteur de Dakar using different methods including RT-PCR, ELISA, plaque reduction neutralization test and viral isolation. RT-PCR positive samples have been analysed by Next Generation Sequencing. From 2012 to 2021, 7912 samples have been analysed and WNV positive cases have been detected, 20 human cases (19 IgM and 1 RT-PCR positive cases) and 41 mosquito pools. Phylogenetic analyzes of the sequences of complete genomes obtained showed the circulation of lineage 1a, with all these recent strains from Senegal identical to each other and very close to strains isolated from horse in France in 2015, Italy and Spain. Our data showed lineage 1a endemicity in Senegal as previously described, with circulation of WNV in humans and mosquitoes. Phylogenetic analyzes carried out with the genome sequences obtained also revealed exchanges of WNV strains between Europe and Senegal which could be possible via migratory birds. The surveillance systems that have enabled the detection of WNV in humans and arthropods should be extended to animals in a one-health approach to better prepare for global health threats.
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Affiliation(s)
| | - El Hadji Ndiaye
- Zoology Medical Department, Institut Pasteur de Dakar, Dakar 220, Senegal
| | - Martin Faye
- Virology Department, Institut Pasteur de Dakar, Dakar 220, Senegal
| | | | - Diawo Diallo
- Zoology Medical Department, Institut Pasteur de Dakar, Dakar 220, Senegal
| | - Amadou Diallo
- Epidemiology, Clinical Research and Data Science Department, Institut Pasteur de Dakar, Dakar 220, Senegal
| | | | - Cheikh Loucoubar
- Epidemiology, Clinical Research and Data Science Department, Institut Pasteur de Dakar, Dakar 220, Senegal
| | - Oumar Faye
- Virology Department, Institut Pasteur de Dakar, Dakar 220, Senegal
| | - Mawlouth Diallo
- Zoology Medical Department, Institut Pasteur de Dakar, Dakar 220, Senegal
| | - Ousmane Faye
- Virology Department, Institut Pasteur de Dakar, Dakar 220, Senegal
| | - Mamadou Aliou Barry
- Epidemiology, Clinical Research and Data Science Department, Institut Pasteur de Dakar, Dakar 220, Senegal
| | - Gamou Fall
- Virology Department, Institut Pasteur de Dakar, Dakar 220, Senegal
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Lorenz C, de Azevedo TS, Chiaravalloti-Neto F. Impact of climate change on West Nile virus distribution in South America. Trans R Soc Trop Med Hyg 2022; 116:1043-1053. [PMID: 35640005 DOI: 10.1093/trstmh/trac044] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 02/14/2022] [Accepted: 04/22/2022] [Indexed: 01/19/2023] Open
Abstract
BACKGROUND West Nile virus (WNV) is a vector-borne pathogen of global relevance and is currently the most widely distributed flavivirus causing encephalitis worldwide. Climate conditions have direct and indirect impacts on vector abundance and virus dynamics within the mosquito. The significance of environmental variables as drivers in WNV epidemiology is increasing under the current climate change scenario. In this study we used a machine learning algorithm to model WNV distributions in South America. METHODS Our model evaluated eight environmental variables for their contribution to the occurrence of WNV since its introduction in South America in 2004. RESULTS Our results showed that environmental variables can directly alter the occurrence of WNV, with lower precipitation and higher temperatures associated with increased virus incidence. High-risk areas may be modified in the coming years, becoming more evident with high greenhouse gas emission levels. Countries such as Bolivia, Paraguay and several Brazilian areas, mainly in the northeast and midwest regions and the Pantanal biome, will be greatly affected, drastically changing the current WNV distribution. CONCLUSIONS Understanding the linkages between climatological and ecological change as determinants of disease emergence and redistribution will help optimize preventive strategies. Increased virus surveillance, integrated modelling and the use of geographically based data systems will provide more anticipatory measures by the scientific community.
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Affiliation(s)
- Camila Lorenz
- Department of Epidemiology, School of Public Health, University of Sao Paulo, Av. Dr Arnaldo, 715, São Paulo CEP 05509-300, Brazil
| | - Thiago Salomão de Azevedo
- Secretary of Health, Municipality of Santa Barbara d'Oeste - CEP 13450-021, Sao Paulo, Brazil.,Laboratory of Entomology and Molecular Systematic, School of Public Health, University of Sao Paulo, Av. Dr Arnaldo, 715, São Paulo CEP 05509-300, Brazil
| | - Francisco Chiaravalloti-Neto
- Department of Epidemiology, School of Public Health, University of Sao Paulo, Av. Dr Arnaldo, 715, São Paulo CEP 05509-300, Brazil
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Adelman JS, Tokarz RE, Euken AE, Field EN, Russell MC, Smith RC. Relative Influence of Land Use, Mosquito Abundance, and Bird Communities in Defining West Nile Virus Infection Rates in Culex Mosquito Populations. INSECTS 2022; 13:758. [PMID: 36135459 PMCID: PMC9502061 DOI: 10.3390/insects13090758] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 08/16/2022] [Accepted: 08/21/2022] [Indexed: 06/16/2023]
Abstract
Since its introduction to North America in 1999, the West Nile virus (WNV) has resulted in over 50,000 human cases and 2400 deaths. WNV transmission is maintained via mosquito vectors and avian reservoir hosts, yet mosquito and avian infections are not uniform across ecological landscapes. As a result, it remains unclear whether the ecological communities of the vectors or reservoir hosts are more predictive of zoonotic risk at the microhabitat level. We examined this question in central Iowa, representative of the midwestern United States, across a land use gradient consisting of suburban interfaces with natural and agricultural habitats. At eight sites, we captured mosquito abundance data using New Jersey light traps and monitored bird communities using visual and auditory point count surveys. We found that the mosquito minimum infection rate (MIR) was better predicted by metrics of the mosquito community than metrics of the bird community, where sites with higher proportions of Culex pipiens group mosquitoes during late summer (after late July) showed higher MIRs. Bird community metrics did not significantly influence mosquito MIRs across sites. Together, these data suggest that the microhabitat suitability of Culex vector species is of greater importance than avian community composition in driving WNV infection dynamics at the urban and agricultural interface.
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Affiliation(s)
- James S. Adelman
- Department of Natural Resource Ecology and Management, Iowa State University, Ames, IA 50011, USA
- Department of Biological Sciences, The University of Memphis, Memphis, TN 38152, USA
| | - Ryan E. Tokarz
- Department of Entomology, Iowa State University, Ames, IA 50011, USA
- Department of International and Global Health, Mercer University, Macon, GA 31207, USA
| | - Alec E. Euken
- Department of Natural Resource Ecology and Management, Iowa State University, Ames, IA 50011, USA
| | - Eleanor N. Field
- Department of Entomology, Iowa State University, Ames, IA 50011, USA
| | - Marie C. Russell
- Department of Entomology, Iowa State University, Ames, IA 50011, USA
| | - Ryan C. Smith
- Department of Entomology, Iowa State University, Ames, IA 50011, USA
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Aardema ML, Campana MG, Wagner NE, Ferreira FC, Fonseca DM. A gene-based capture assay for surveying patterns of genetic diversity and insecticide resistance in a worldwide group of invasive mosquitoes. PLoS Negl Trop Dis 2022; 16:e0010689. [PMID: 35939523 PMCID: PMC9387926 DOI: 10.1371/journal.pntd.0010689] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Revised: 08/18/2022] [Accepted: 07/20/2022] [Indexed: 12/30/2022] Open
Abstract
Understanding patterns of diversification, genetic exchange, and pesticide resistance in arthropod disease vectors is necessary for effective population management. With the availability of next-generation sequencing technologies, one of the best approaches for surveying such patterns involves the simultaneous genotyping of many samples for a large number of genetic markers. To this end, the targeting of gene sequences of known function can be a cost-effective strategy. One insect group of substantial health concern are the mosquito taxa that make up the Culex pipiens complex. Members of this complex transmit damaging arboviruses and filariae worms to humans, as well as other pathogens such as avian malaria parasites that are detrimental to birds. Here we describe the development of a targeted, gene-based assay for surveying genetic diversity and population structure in this mosquito complex. To test the utility of this assay, we sequenced samples from several members of the complex, as well as from distinct populations of the relatively under-studied Culex quinquefasciatus. The data generated was then used to examine taxonomic divergence and population clustering between and within these mosquitoes. We also used this data to investigate genetic variants present in our samples that had previously been shown to correlate with insecticide-resistance. Broadly, our gene capture approach successfully enriched the genomic regions of interest, and proved effective for facilitating examinations of taxonomic divergence and geographic clustering within the Cx. pipiens complex. It also allowed us to successfully survey genetic variation associated with insecticide resistance in Culex mosquitoes. This enrichment protocol will be useful for future studies that aim to understand the genetic mechanisms underlying the evolution of these ubiquitous and increasingly damaging disease vectors. The mosquito taxa that make up the Culex pipiens complex are important vectors of the agents of several human diseases such as West Nile and St. Louis encephalitides, and lymphatic filariasis. They are also important vectors of avian malaria, which impacts livestock and wildlife. The development of effective strategies for the control of these mosquitoes requires knowledge of their origins, distribution, dispersal patterns, and the extent to which discreet taxonomic entities within the complex interbreed. To achieve these objectives, it is necessary to compare patterns of genetic diversity across many mosquito samples, which can be cost-prohibitive. To address this limitation, we developed a targeted, gene-based assay that allowed us to cost-effectively genotype a large number of genetic variants from a representative global sampling of individual Cx. pipiens complex mosquitoes. We show that this assay is a powerful tool for examining genetic structure and hybridization among populations. We also explore its utility for surveying alleles previously shown to be associated with insecticide resistance. Future use of this enrichment assay and the bioinformatics methods described here will allow researchers to study evolutionary patterns across the Cx. pipiens complex as well as monitor the presence of genetic variation that could affect control efforts.
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Affiliation(s)
- Matthew L. Aardema
- Department of Biology, Montclair State University, Montclair, New Jersey, United States of America
- Sackler Institute for Comparative Genomics, American Museum of Natural History, New York, New York, United States of America
- * E-mail: (MLA); (DMF)
| | - Michael G. Campana
- Center for Conservation Genomics, Smithsonian’s National Zoo and Conservation Biology Institute, Washington, DC, United States of America
| | - Nicole E. Wagner
- Center for Vector Biology, Rutgers University, New Brunswick, New Jersey, United States of America
| | - Francisco C. Ferreira
- Center for Conservation Genomics, Smithsonian’s National Zoo and Conservation Biology Institute, Washington, DC, United States of America
- Center for Vector Biology, Rutgers University, New Brunswick, New Jersey, United States of America
| | - Dina M. Fonseca
- Center for Vector Biology, Rutgers University, New Brunswick, New Jersey, United States of America
- * E-mail: (MLA); (DMF)
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Wimberly MC, Davis JK, Hildreth MB, Clayton JL. Integrated Forecasts Based on Public Health Surveillance and Meteorological Data Predict West Nile Virus in a High-Risk Region of North America. ENVIRONMENTAL HEALTH PERSPECTIVES 2022; 130:87006. [PMID: 35972761 PMCID: PMC9380861 DOI: 10.1289/ehp10287] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Revised: 07/29/2022] [Accepted: 08/01/2022] [Indexed: 06/09/2023]
Abstract
BACKGROUND West Nile virus (WNV), a global arbovirus, is the most prevalent mosquito-transmitted infection in the United States. Forecasts of WNV risk during the upcoming transmission season could provide the basis for targeted mosquito control and disease prevention efforts. We developed the Arbovirus Mapping and Prediction (ArboMAP) WNV forecasting system and used it in South Dakota from 2016 to 2019. This study reports a post hoc forecast validation and model comparison. OBJECTIVES Our objective was to validate historical predictions of WNV cases with independent data that were not used for model calibration. We tested the hypothesis that predictive models based on mosquito surveillance data combined with meteorological variables were more accurate than models based on mosquito or meteorological data alone. METHODS The ArboMAP system incorporated models that predicted the weekly probability of observing one or more human WNV cases in each county. We compared alternative models with different predictors including a) a baseline model based only on historical WNV cases, b) mosquito models based on seasonal patterns of infection rates, c) environmental models based on lagged meteorological variables, including temperature and vapor pressure deficit, d) combined models with mosquito infection rates and lagged meteorological variables, and e) ensembles of two or more combined models. During the WNV season, models were calibrated using data from previous years and weekly predictions were made using data from the current year. Forecasts were compared with observed cases to calculate the area under the receiver operating characteristic curve (AUC) and other metrics of spatial and temporal prediction error. RESULTS Mosquito and environmental models outperformed the baseline model that included county-level averages and seasonal trends of WNV cases. Combined models were more accurate than models based only on meteorological or mosquito infection variables. The most accurate model was a simple ensemble mean of the two best combined models. Forecast accuracy increased rapidly from early June through early July and was stable thereafter, with a maximum AUC of 0.85. The model predictions captured the seasonal pattern of WNV as well as year-to-year variation in case numbers and the geographic pattern of cases. DISCUSSION The predictions reached maximum accuracy early enough in the WNV season to allow public health responses before the peak of human cases in August. This early warning is necessary because other indicators of WNV risk, including early reports of human cases and mosquito abundance, are poor predictors of case numbers later in the season. https://doi.org/10.1289/EHP10287.
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Affiliation(s)
- Michael C. Wimberly
- Department of Geography and Environmental Sustainability, University of Oklahoma, Norman, Oklahoma, USA
| | - Justin K. Davis
- Department of Geography and Environmental Sustainability, University of Oklahoma, Norman, Oklahoma, USA
| | - Michael B. Hildreth
- Department of Biology and Microbiology, South Dakota State University, Brookings, South Dakota, USA
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Caldwell HS, Pata JD, Ciota AT. The Role of the Flavivirus Replicase in Viral Diversity and Adaptation. Viruses 2022; 14:1076. [PMID: 35632818 PMCID: PMC9143365 DOI: 10.3390/v14051076] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 05/03/2022] [Accepted: 05/06/2022] [Indexed: 02/04/2023] Open
Abstract
Flaviviruses include several emerging and re-emerging arboviruses which cause millions of infections each year. Although relatively well-studied, much remains unknown regarding the mechanisms and means by which these viruses readily alternate and adapt to different hosts and environments. Here, we review a subset of the different aspects of flaviviral biology which impact host switching and viral fitness. These include the mechanism of replication and structural biology of the NS3 and NS5 proteins, which reproduce the viral genome; rates of mutation resulting from this replication and the role of mutational frequency in viral fitness; and the theory of quasispecies evolution and how it contributes to our understanding of genetic and phenotypic plasticity.
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Affiliation(s)
- Haley S. Caldwell
- The Arbovirus Laboratory, Wadsworth Center, New York State Department of Health, Slingerlands, NY 12159, USA;
- Department of Biomedical Sciences, State University of New York at Albany, School of Public Health, Rensselaer, NY 12144, USA;
| | - Janice D. Pata
- Department of Biomedical Sciences, State University of New York at Albany, School of Public Health, Rensselaer, NY 12144, USA;
- Wadsworth Center, New York State Department of Health, Albany, NY 12208, USA
| | - Alexander T. Ciota
- The Arbovirus Laboratory, Wadsworth Center, New York State Department of Health, Slingerlands, NY 12159, USA;
- Department of Biomedical Sciences, State University of New York at Albany, School of Public Health, Rensselaer, NY 12144, USA;
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The value of West Nile virus RNA detection by real-time RT-PCR in urine samples from patients with neuroinvasive forms. Arch Microbiol 2022; 204:238. [DOI: 10.1007/s00203-022-02829-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Accepted: 03/08/2022] [Indexed: 11/26/2022]
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Holcomb KM, Nguyen C, Foy BD, Ahn M, Cramer K, Lonstrup ET, Mete A, Tell LA, Barker CM. Effects of ivermectin treatment of backyard chickens on mosquito dynamics and West Nile virus transmission. PLoS Negl Trop Dis 2022; 16:e0010260. [PMID: 35333866 PMCID: PMC9012369 DOI: 10.1371/journal.pntd.0010260] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Revised: 04/15/2022] [Accepted: 02/14/2022] [Indexed: 11/18/2022] Open
Abstract
Background Vector control strategies typically rely on pesticides to target mosquitoes involved in enzootic and zoonotic transmission of West Nile virus (WNV). Nevertheless, increasing insecticide resistance and a desire to reduce pesticide usage provide the impetus for developing alternative strategies. Ivermectin (IVM), an antiparasitic drug which is widely used in human and veterinary medicine, is a potential alternative for targeted control because Culex mosquitoes experience increased mortality following ingestion of IVM in bloodmeals. Methodology/Principal findings We conducted a randomized field trial to investigate the impact of treating backyard chicken flocks with IVM in urban neighborhoods across Davis, California on mosquito populations and WNV transmission dynamics. We observed a significant reduction in WNV seroconversions in treated vs. untreated chickens, suggesting a reduction in WNV transmission intensity around treated flocks. We also detected a reduction in parity rates of Cx. tarsalis near treated vs. untreated flocks and increased mortality in wild mosquitoes following a bloodmeal on treated chickens (IVM serum concentration > 5ng/mL) vs. chickens with IVM serum concentrations < 5 ng/mL. However, we did not find a significant difference in abundance or infection prevalence in mosquitoes between treatment groups associated with the reductions in seroconversions. Mosquito immigration from surrounding larval habitat, relatively low WNV activity in the study area, and variable IVM serum concentrations likely contributed to uncertainty about the impact. Conclusions/Significance Taken together, our results point to a reduction in WNV transmission due to the impact of IVM on Culex mosquito populations and support the ongoing investigation of oral administration of IVM to wild birds for local control of WNV transmission, although further work is needed to optimize dosing and understand effects on entomological endpoints. Current mosquito control strategies aimed to prevent pathogen transmission to humans have limited ability to target mosquitoes involved in amplification and spillover transmission of pathogens like West Nile virus (WNV). Additionally, growing prevalence of insecticide resistance in mosquito populations limit the efficacy of these insecticide-based control strategies. Ivermectin (IVM) provides an alternative avenue for control by increasing the mortality of mosquitoes that ingest this drug in bloodmeals. Therefore, IVM treatment of avian species that account for the majority of mosquito bloodmeals during the WNV transmission season could be an effective control strategy. Building on pilot studies indicating the efficacy and feasibility of IVM-deployment for WNV control, we performed a randomized field trial to investigate the impact of IVM-treatment of backyard chickens on local population dynamics of Culex mosquitoes and WNV transmission. We were able to link changes in mosquito populations to reduction in WNV transmission, as measured by chicken seroconversions, through IVM-induced mortality in mosquitoes. However, further work is needed to identify the impact of treatment on mosquito abundance and infection prevalence to fully attribute observed changes to IVM administration. Overall, our results support IVM treatment as a potentially effective alternative to insecticide-based vector control strategies and one that can be used to target WNV transmission on the local scale.
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Affiliation(s)
- Karen M. Holcomb
- Davis Arbovirus Research and Training Laboratory, Department of Pathology, Microbiology, and Immunology, School of Veterinary Medicine, University of California, Davis, California, United States of America
| | - Chilinh Nguyen
- Center for Vector-borne Infectious Diseases, Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, Colorado, United States of America
| | - Brian D. Foy
- Center for Vector-borne Infectious Diseases, Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, Colorado, United States of America
| | - Michelle Ahn
- Davis Arbovirus Research and Training Laboratory, Department of Pathology, Microbiology, and Immunology, School of Veterinary Medicine, University of California, Davis, California, United States of America
| | - Kurt Cramer
- Davis Arbovirus Research and Training Laboratory, Department of Pathology, Microbiology, and Immunology, School of Veterinary Medicine, University of California, Davis, California, United States of America
| | - Emma T. Lonstrup
- Davis Arbovirus Research and Training Laboratory, Department of Pathology, Microbiology, and Immunology, School of Veterinary Medicine, University of California, Davis, California, United States of America
| | - Asli Mete
- California Animal Health and Food Safety Lab, Department of Pathology, Microbiology & Immunology, University of California, Davis, California, United States of America
| | - Lisa A. Tell
- Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California, Davis, California, United States of America
| | - Christopher M. Barker
- Davis Arbovirus Research and Training Laboratory, Department of Pathology, Microbiology, and Immunology, School of Veterinary Medicine, University of California, Davis, California, United States of America
- * E-mail:
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Rakotoarinia MR, Blanchet FG, Gravel D, Lapen DR, Leighton PA, Ogden NH, Ludwig A. Effects of land use and weather on the presence and abundance of mosquito-borne disease vectors in a urban and agricultural landscape in Eastern Ontario, Canada. PLoS One 2022; 17:e0262376. [PMID: 35271575 PMCID: PMC8912203 DOI: 10.1371/journal.pone.0262376] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Accepted: 02/21/2022] [Indexed: 11/19/2022] Open
Abstract
Weather and land use can significantly impact mosquito abundance and presence, and by consequence, mosquito-borne disease (MBD) dynamics. Knowledge of vector ecology and mosquito species response to these drivers will help us better predict risk from MBD. In this study, we evaluated and compared the independent and combined effects of weather and land use on mosquito species occurrence and abundance in Eastern Ontario, Canada. Data on occurrence and abundance (245,591 individuals) of 30 mosquito species were obtained from mosquito capture at 85 field sites in 2017 and 2018. Environmental variables were extracted from weather and land use datasets in a 1-km buffer around trapping sites. The relative importance of weather and land use on mosquito abundance (for common species) or occurrence (for all species) was evaluated using multivariate hierarchical statistical models. Models incorporating both weather and land use performed better than models that include weather only for approximately half of species (59% for occurrence model and 50% for abundance model). Mosquito occurrence was mainly associated with temperature whereas abundance was associated with precipitation and temperature combined. Land use was more often associated with abundance than occurrence. For most species, occurrence and abundance were positively associated with forest cover but for some there was a negative association. Occurrence and abundance of some species (47% for occurrence model and 88% for abundance model) were positively associated with wetlands, but negatively associated with urban (Culiseta melanura and Anopheles walkeri) and agriculture (An. quadrimaculatus, Cs. minnesotae and An. walkeri) environments. This study provides predictive relationships between weather, land use and mosquito occurrence and abundance for a wide range of species including those that are currently uncommon, yet known as arboviruses vectors. Elucidation of these relationships has the potential to contribute to better prediction of MBD risk, and thus more efficiently targeted prevention and control measures.
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Affiliation(s)
- Miarisoa Rindra Rakotoarinia
- Département de Pathologie et Microbiologie, Faculté de Médecine Vétérinaire, Université de Montréal, Saint-Hyacinthe, Québec, Canada
- Groupe de Recherche en Épidémiologie des Zoonoses et Santé Publique (GREZOSP), Faculté de Médecine Vétérinaire, Université de Montréal, Saint-Hyacinthe, Québec, Canada
| | - F. Guillaume Blanchet
- Département de Biologie, Université de Sherbrooke, Sherbrooke, Canada
- Département de Mathématique, Université de Sherbrooke, Sherbrooke, Canada
- Département des Sciences de la Santé Communautaire, Université de Sherbrooke, Sherbrooke, Canada
| | - Dominique Gravel
- Département de Biologie, Université de Sherbrooke, Sherbrooke, Canada
| | - David R. Lapen
- Eastern Cereal and Oilseed Research Center, Agriculture and Agrifood Canada, Ottawa, Canada
| | - Patrick A. Leighton
- Département de Pathologie et Microbiologie, Faculté de Médecine Vétérinaire, Université de Montréal, Saint-Hyacinthe, Québec, Canada
- Groupe de Recherche en Épidémiologie des Zoonoses et Santé Publique (GREZOSP), Faculté de Médecine Vétérinaire, Université de Montréal, Saint-Hyacinthe, Québec, Canada
| | - Nicholas H. Ogden
- Groupe de Recherche en Épidémiologie des Zoonoses et Santé Publique (GREZOSP), Faculté de Médecine Vétérinaire, Université de Montréal, Saint-Hyacinthe, Québec, Canada
- Public Health Sciences Division, National Microbiology Laboratory, Public Health Agency of Canada, St-Hyacinthe, Canada
| | - Antoinette Ludwig
- Groupe de Recherche en Épidémiologie des Zoonoses et Santé Publique (GREZOSP), Faculté de Médecine Vétérinaire, Université de Montréal, Saint-Hyacinthe, Québec, Canada
- Public Health Sciences Division, National Microbiology Laboratory, Public Health Agency of Canada, St-Hyacinthe, Canada
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Russell MC, Herzog CM, Gajewski Z, Ramsay C, El Moustaid F, Evans MV, Desai T, Gottdenker NL, Hermann SL, Power AG, McCall AC. Both consumptive and non-consumptive effects of predators impact mosquito populations and have implications for disease transmission. eLife 2022; 11:e71503. [PMID: 35044908 PMCID: PMC8769645 DOI: 10.7554/elife.71503] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Accepted: 12/01/2021] [Indexed: 11/13/2022] Open
Abstract
Predator-prey interactions influence prey traits through both consumptive and non-consumptive effects, and variation in these traits can shape vector-borne disease dynamics. Meta-analysis methods were employed to generate predation effect sizes by different categories of predators and mosquito prey. This analysis showed that multiple families of aquatic predators are effective in consumptively reducing mosquito survival, and that the survival of Aedes, Anopheles, and Culex mosquitoes is negatively impacted by consumptive effects of predators. Mosquito larval size was found to play a more important role in explaining the heterogeneity of consumptive effects from predators than mosquito genus. Mosquito survival and body size were reduced by non-consumptive effects of predators, but development time was not significantly impacted. In addition, Culex vectors demonstrated predator avoidance behavior during oviposition. The results of this meta-analysis suggest that predators limit disease transmission by reducing both vector survival and vector size, and that associations between drought and human West Nile virus cases could be driven by the vector behavior of predator avoidance during oviposition. These findings are likely to be useful to infectious disease modelers who rely on vector traits as predictors of transmission.
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Affiliation(s)
- Marie C Russell
- Department of Life Sciences, Imperial College London, Silwood Park CampusAscotUnited Kingdom
| | - Catherine M Herzog
- Center for Infectious Disease Dynamics, Pennsylvania State UniversityUniversity ParkUnited States
| | - Zachary Gajewski
- Department of Biological Sciences, Virginia Polytechnic Institute and State UniversityBlacksburgUnited States
| | - Chloe Ramsay
- Department of Biological Sciences, University of Notre DameNotre DameUnited States
| | - Fadoua El Moustaid
- Department of Biological Sciences, Virginia Polytechnic Institute and State UniversityBlacksburgUnited States
| | - Michelle V Evans
- Odum School of Ecology & Center for Ecology of Infectious Diseases, University of GeorgiaAthensUnited States
- MIVEGEC, IRD, CNRS, Université MontpellierMontpellierFrance
| | - Trishna Desai
- Nuffield Department of Population Health, University of OxfordOxfordUnited Kingdom
| | - Nicole L Gottdenker
- Odum School of Ecology & Center for Ecology of Infectious Diseases, University of GeorgiaAthensUnited States
- Department of Veterinary Pathology, University of Georgia College of Veterinary MedicineAthensUnited States
| | - Sara L Hermann
- Department of Entomology, Pennsylvania State UniversityUniversity ParkUnited States
| | - Alison G Power
- Department of Ecology & Evolutionary Biology, Cornell UniversityIthacaUnited States
| | - Andrew C McCall
- Biology Department, Denison UniversityGranvilleUnited States
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46
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Aguilera-Sepúlveda P, Gómez-Martín B, Agüero M, Jiménez-Clavero MÁ, Fernández-Pinero J. A new cluster of West Nile virus lineage 1 isolated from a northern goshawk in Spain. Transbound Emerg Dis 2021; 69:3121-3127. [PMID: 34812592 DOI: 10.1111/tbed.14399] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 10/28/2021] [Accepted: 11/07/2021] [Indexed: 12/21/2022]
Abstract
West Nile Virus (WNV; family Flaviviridae, genus flavivirus) is a zoonotic arbovirus worldwide spread. Its genetic diversity has allowed the definition of at least seven lineages, being lineages 1 and 2 the most widely distributed. Western Mediterranean region has been affected by WNV since decades. In Spain, WNV is actively circulating, provoking annual outbreaks in birds, horses and lately in humans. Lineage 1 is responsible for outbreaks that occurred in central and southern regions, while lineage 2 has been recently described in wild birds in north-eastern part of the country. During 2017 season, a disease outbreak in captive raptors was reported in southern Spain and WNV was isolated from a dead northern goshawk. Full genome sequencing was followed by phylogenetic analyses and analyses of the amino acidic substitutions. This strain, named Spain/2017/NG-b, highly differs from those which have been circulating both in Spain and in the neighbouring Mediterranean countries, constituting a new distinct group, tentatively classified in a newly defined cluster 7 within the WNV clade 1a, supporting a new, independent introduction of the virus in the Western Mediterranean region from an unknown origin. Besides, circumstantial evidence indicates that this emerging WNV strain could be behind the subsequent outbreak occurred nearby in horses. Overall, the reinforcement of surveillance programs, especially in wild birds, is essential to early detect the circulation of WNV and other related flaviviruses that could cause outbreaks in wild or domestic birds, equine and human populations.
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Affiliation(s)
- Pilar Aguilera-Sepúlveda
- Departamento de enfermedades infecciosas y salud global, Centro de Investigación en Sanidad Animal (CISA), Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA-CSIC), Valdeolmos, Madrid, Spain
| | | | | | - Miguel Ángel Jiménez-Clavero
- Departamento de enfermedades infecciosas y salud global, Centro de Investigación en Sanidad Animal (CISA), Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA-CSIC), Valdeolmos, Madrid, Spain.,CIBER of Epidemiology and Public Health (CIBERESP), Madrid, Madrid, Spain
| | - Jovita Fernández-Pinero
- Departamento de enfermedades infecciosas y salud global, Centro de Investigación en Sanidad Animal (CISA), Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA-CSIC), Valdeolmos, Madrid, Spain
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47
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Two Interferon-Stimulated Response Elements Cooperatively Regulate Interferon-Stimulated Gene Expression in West Nile Virus-Infected IFNAR -/- Mouse Embryo Fibroblasts. J Virol 2021; 95:e0104021. [PMID: 34495694 DOI: 10.1128/jvi.01040-21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
We previously identified a subset of interferon-stimulated genes (ISGs) upregulated by West Nile virus (WNV) infection in wild-type mouse embryo fibroblasts (MEFs) after viral proteins had inhibited type I interferon (IFN)-mediated JAK-STAT signaling and also in WNV-infected RIG-I-/-, MDA5-/-, STAT1-/-, STAT2-/-, IFNAR-/-, IRF3-/-, IRF7-/-, and IRF3/7-/- MEFs. In this study, ISG upregulation by WNV infection in IFNAR-/- MEFs was confirmed by transcriptome sequencing (RNA-seq). ISG upregulation by WNV infection was inhibited in RIG-I/MDA5-/- MEFs. ISGs were upregulated in IRF1-/- and IRF5-/- MEFs but only minimally upregulated in IRF3/5/7-/- MEFs, suggesting redundant IRF involvement. We previously showed that a single proximal interferon-stimulated response element (ISRE) in the Oas1a and Oas1b promoters bound the ISGF3 complex after type I IFN treatment. In this study, we used wild-type and mutant promoter luciferase reporter constructs to identify critical regions in the Oas1b and Ifit1 promoters for gene activation in infected IFNAR-/- MEFs. Two ISREs were required in both promoters. Mutation of these ISREs in an Ifit1 promoter DNA probe reduced in vitro complex formation with infected nuclear extracts. An NF-κB inhibitor decreased Ifit1 promoter activity in cells and in vitro complex formation. IRF3 and p50 promoter binding was detected by chromatin immunoprecipitation (ChIP) for upregulated ISGs with two proximal ISREs. The data indicate that ISREs function cooperatively to upregulate the expression of some ISGs when type I IFN signaling is absent, with the binding complex consisting of IRF3, IRF5, and/or IRF7 and an NF-κB component(s) as well as other, as-yet-unknown factors. IMPORTANCE Type I IFN signaling in mammalian cells induces formation of the ISGF3 transcription factor complex, which binds to interferon stimulated response elements (ISREs) in the promoters of interferon-stimulated genes (ISGs) in the cell nucleus. Flavivirus proteins counteract type I IFN signaling by preventing either the formation or nuclear localization of ISGF3. A subset of ISRE-regulated ISGs was still induced in West Nile virus (WNV)-infected mouse embryo fibroblasts (MEFs), indicating that cells have an alternative mechanism for activating these ISGs. In this study, cellular components involved in this ISG upregulation mechanism were identified using gene knockout MEFs and ChIP, and critical promoter regions for gene activation were mapped using reporter assays. The data indicate a cooperative function between two ISREs and required binding of IRF3, IRF5, and/or IRF7 and an NF-κB component(s). Moreover, type I IFN signaling-independent ISG activation requires different additional promoter activation regions than type I IFN-dependent activation.
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48
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Ilahi I, Yousafzai AM, Attaullah M, Haq TU, Rahim A, Khan W, Khan AA, Ullah S, Jan T, Khan MM, Rahim G, Zaman N. Mosquitocidal activities of Chenopodium botrys whole plant n-hexane extract against Culex quinquefasciatus. BRAZ J BIOL 2021; 83:e240842. [PMID: 34550279 DOI: 10.1590/1519-6984.240842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2020] [Accepted: 12/21/2020] [Indexed: 11/22/2022] Open
Abstract
This research aimed to investigate various mosquitocidal activities of Chenopodium botrys whole- plant n-hexane extract against Culex quinquefasciatus. The extract showed remarkable larvicidal, pupicidal, adulticidal, oviposition deterrent and adult emergence inhibitory activities against Cx. quinquefasciatus. During the larvicidal and pupicidal activities, the 24-hour lethal concentration (LC50) of extract against 2nd instar larvae, 4th instar larvae and pupae were 324.6, 495.6 and 950.8 ppm, respectively. During the CDC (Centers for Disease Control and Prevention) bottle bioassay for adulticidal activity, the median knockdown times (KDT50) at 1.25% concentration was 123.4 minutes. During the filter paper impregnation bioassay for adulticidal activity, the KDT50 value at 0.138 mg/cm2 concentration was 48.6 minutes. The extract was fractionated into 14 fractions through silica gel column chromatography which were then combined into six fractions on the basis of similar retention factor (Rf) value. These fractions were screened for adulticidal activity by applying CDC bottle bioassay. The fraction obtained through 60:40 to 50:50% n-hexanes-chloroform mobile phase with 0.5 Rf value showed 100% adulticidal activity at 0.2% concentration. During oviposition deterrent activity, the highest concentration (1000 ppm) showed 71.3 ± 4.4% effective repellence and 0.6 ± 0.1 oviposition activity index. During adult emergence inhibition activity, the median emergence inhibition (EI50) value was 312.3 ppm. From the outcome of the present investigation, it is concluded that the n-hexane extract of C. botrys whole- plant possesses strong larvicidal, pupicidal, adulticidal, oviposition deterrent and adult emergence inhibitory activities against Cx. quinquefasciatus.
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Affiliation(s)
- I Ilahi
- University of Malakand, Department of Zoology, Chakdara, Dir Lower, Khyber Pakhtunkhwa, Pakistan.,Islamia College Peshawar, Department of Zoology, Peshawar, Khyber Pakhtunkhwa, Pakistan
| | - A M Yousafzai
- Islamia College Peshawar, Department of Zoology, Peshawar, Khyber Pakhtunkhwa, Pakistan
| | - M Attaullah
- University of Malakand, Department of Zoology, Chakdara, Dir Lower, Khyber Pakhtunkhwa, Pakistan
| | - T U Haq
- University of Malakand, Department of Biotechnology, Chakdara, Dir Lower, Khyber Pakhtunkhwa, Pakistan
| | - A Rahim
- University of Malakand, Department of Zoology, Chakdara, Dir Lower, Khyber Pakhtunkhwa, Pakistan
| | - W Khan
- University of Malakand, Department of Zoology, Chakdara, Dir Lower, Khyber Pakhtunkhwa, Pakistan
| | - A A Khan
- University of Malakand, Department of Biotechnology, Chakdara, Dir Lower, Khyber Pakhtunkhwa, Pakistan
| | - S Ullah
- University of Malakand, Department of Botany, Chakdara, Dir Lower, Khyber Pakhtunkhwa, Pakistan
| | - T Jan
- University of Malakand, Department of Botany, Chakdara, Dir Lower, Khyber Pakhtunkhwa, Pakistan
| | - M M Khan
- The University of Haripur, Department of Microbiology, Haripur, Khyber Pakhtunkhwa, Pakistan
| | - G Rahim
- University of Malakand, Department of Botany, Chakdara, Dir Lower, Khyber Pakhtunkhwa, Pakistan
| | - N Zaman
- University of Swat, Centre for Biotechnology and Microbiology, Swat, Khyber Pakhtunkhwa, Pakistan
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49
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Phylogenetic analysis of West Nile virus: first report of lineage 1 in donkey in Turkey. Trop Anim Health Prod 2021; 53:453. [PMID: 34536145 DOI: 10.1007/s11250-021-02892-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2021] [Accepted: 09/10/2021] [Indexed: 10/20/2022]
Abstract
West Nile virus (WNV), a member of the Flaviviridae, is a major arbovirus that causes West Nile fever. Previous data showed the prevalence of the WNV serologically and molecular in Turkey, and the presence of lineage 1 in horses and humans has been reported. This is the first notification of partial phylogeny of WNV detected in donkeys in the northeast of Turkey (on the Iranian border). Blood serum samples collected from 25 donkeys without clinical symptoms were tested by RT-PCR. Sequence analysis of the sample detected as positive was performed. Multiple sequence alignments of reference sequences taken from GenBank were performed using the ClustalW method using the MEGA6 program. Partial nucleotide sequences of the capsid gene coding region revealed that the strains are closely related to viruses of lineage 1, clade 1a. According to the phylogenetic tree, the TUR/Igdir/donkey strain was included in the same cluster as the strain (KJ958922) previously obtained from horses in Turkey and the strain (GQ851658) from the Central African Republic. This study is the first report to show the circulation of WNV lineage 1 in donkeys in Turkey.
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50
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Trogu T, Canziani S, Salvato S, Tolini C, Grilli G, Chiari M, Farioli M, Alborali L, Gaffuri A, Sala G, Bianchi A, Rosignoli C, Prati P, Gradassi M, Sozzi E, Lelli D, Lavazza A, Moreno A. Survey on the Presence of Viruses of Economic and Zoonotic Importance in Avifauna in Northern Italy. Microorganisms 2021; 9:1957. [PMID: 34576852 PMCID: PMC8471648 DOI: 10.3390/microorganisms9091957] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 09/01/2021] [Accepted: 09/08/2021] [Indexed: 11/21/2022] Open
Abstract
Wild birds play an important role in the circulation and spread of pathogens that are potentially zoonotic or of high economic impact on zootechnical production. They include, for example, West Nile virus (WNV), Usutu virus (USUV), avian influenza virus (AIV), and Newcastle disease virus (NDV), which, despite having mostly an asymptomatic course in wild birds, have a strong impact on public health and zootechnical production. This study investigated the presence of these viruses in several wild bird species from North Italy during the biennium 2019-2020. Wild birds derived from 76 different species belonging to 20 orders. Out of 679 birds, 27 were positive for WNV (lineage 2) with a prevalence of 4%; all birds were negative for USUV; one gull was positive for H13N6 influenza virus, and 12 samples were positive for NDV with a prevalence of 2%. Despite the low prevalence observed, the analyses performed on these species provide further data, allowing a better understanding of the diffusion and evolution of diseases of both economic and zoonotic importance.
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Affiliation(s)
- Tiziana Trogu
- Istituto Zooprofilattico Sperimentale della Lombardia e dell’Emilia Romagna “Bruno Ubertini” (IZSLER), Via Antonio Bianchi 7/9, 25124 Brescia, Italy; (T.T.); (S.S.); (C.T.); (L.A.); (A.G.); (G.S.); (A.B.); (C.R.); (P.P.); (M.G.); (E.S.); (D.L.); (A.L.); (A.M.)
| | - Sabrina Canziani
- Istituto Zooprofilattico Sperimentale della Lombardia e dell’Emilia Romagna “Bruno Ubertini” (IZSLER), Via Antonio Bianchi 7/9, 25124 Brescia, Italy; (T.T.); (S.S.); (C.T.); (L.A.); (A.G.); (G.S.); (A.B.); (C.R.); (P.P.); (M.G.); (E.S.); (D.L.); (A.L.); (A.M.)
| | - Sara Salvato
- Istituto Zooprofilattico Sperimentale della Lombardia e dell’Emilia Romagna “Bruno Ubertini” (IZSLER), Via Antonio Bianchi 7/9, 25124 Brescia, Italy; (T.T.); (S.S.); (C.T.); (L.A.); (A.G.); (G.S.); (A.B.); (C.R.); (P.P.); (M.G.); (E.S.); (D.L.); (A.L.); (A.M.)
| | - Clara Tolini
- Istituto Zooprofilattico Sperimentale della Lombardia e dell’Emilia Romagna “Bruno Ubertini” (IZSLER), Via Antonio Bianchi 7/9, 25124 Brescia, Italy; (T.T.); (S.S.); (C.T.); (L.A.); (A.G.); (G.S.); (A.B.); (C.R.); (P.P.); (M.G.); (E.S.); (D.L.); (A.L.); (A.M.)
| | - Guido Grilli
- Dipartimento di Medicina Veterinaria, Università degli Studi di Milano, Via dell’Università 6, 26900 Lodi, Italy;
| | - Mario Chiari
- Direzione Generale Welfare, Regional Health Authority of Lombardy, 20124 Milan, Italy; (M.C.); (M.F.)
| | - Marco Farioli
- Direzione Generale Welfare, Regional Health Authority of Lombardy, 20124 Milan, Italy; (M.C.); (M.F.)
| | - Loris Alborali
- Istituto Zooprofilattico Sperimentale della Lombardia e dell’Emilia Romagna “Bruno Ubertini” (IZSLER), Via Antonio Bianchi 7/9, 25124 Brescia, Italy; (T.T.); (S.S.); (C.T.); (L.A.); (A.G.); (G.S.); (A.B.); (C.R.); (P.P.); (M.G.); (E.S.); (D.L.); (A.L.); (A.M.)
| | - Alessandra Gaffuri
- Istituto Zooprofilattico Sperimentale della Lombardia e dell’Emilia Romagna “Bruno Ubertini” (IZSLER), Via Antonio Bianchi 7/9, 25124 Brescia, Italy; (T.T.); (S.S.); (C.T.); (L.A.); (A.G.); (G.S.); (A.B.); (C.R.); (P.P.); (M.G.); (E.S.); (D.L.); (A.L.); (A.M.)
| | - Giovanni Sala
- Istituto Zooprofilattico Sperimentale della Lombardia e dell’Emilia Romagna “Bruno Ubertini” (IZSLER), Via Antonio Bianchi 7/9, 25124 Brescia, Italy; (T.T.); (S.S.); (C.T.); (L.A.); (A.G.); (G.S.); (A.B.); (C.R.); (P.P.); (M.G.); (E.S.); (D.L.); (A.L.); (A.M.)
| | - Alessandro Bianchi
- Istituto Zooprofilattico Sperimentale della Lombardia e dell’Emilia Romagna “Bruno Ubertini” (IZSLER), Via Antonio Bianchi 7/9, 25124 Brescia, Italy; (T.T.); (S.S.); (C.T.); (L.A.); (A.G.); (G.S.); (A.B.); (C.R.); (P.P.); (M.G.); (E.S.); (D.L.); (A.L.); (A.M.)
| | - Carlo Rosignoli
- Istituto Zooprofilattico Sperimentale della Lombardia e dell’Emilia Romagna “Bruno Ubertini” (IZSLER), Via Antonio Bianchi 7/9, 25124 Brescia, Italy; (T.T.); (S.S.); (C.T.); (L.A.); (A.G.); (G.S.); (A.B.); (C.R.); (P.P.); (M.G.); (E.S.); (D.L.); (A.L.); (A.M.)
| | - Paola Prati
- Istituto Zooprofilattico Sperimentale della Lombardia e dell’Emilia Romagna “Bruno Ubertini” (IZSLER), Via Antonio Bianchi 7/9, 25124 Brescia, Italy; (T.T.); (S.S.); (C.T.); (L.A.); (A.G.); (G.S.); (A.B.); (C.R.); (P.P.); (M.G.); (E.S.); (D.L.); (A.L.); (A.M.)
| | - Matteo Gradassi
- Istituto Zooprofilattico Sperimentale della Lombardia e dell’Emilia Romagna “Bruno Ubertini” (IZSLER), Via Antonio Bianchi 7/9, 25124 Brescia, Italy; (T.T.); (S.S.); (C.T.); (L.A.); (A.G.); (G.S.); (A.B.); (C.R.); (P.P.); (M.G.); (E.S.); (D.L.); (A.L.); (A.M.)
| | - Enrica Sozzi
- Istituto Zooprofilattico Sperimentale della Lombardia e dell’Emilia Romagna “Bruno Ubertini” (IZSLER), Via Antonio Bianchi 7/9, 25124 Brescia, Italy; (T.T.); (S.S.); (C.T.); (L.A.); (A.G.); (G.S.); (A.B.); (C.R.); (P.P.); (M.G.); (E.S.); (D.L.); (A.L.); (A.M.)
| | - Davide Lelli
- Istituto Zooprofilattico Sperimentale della Lombardia e dell’Emilia Romagna “Bruno Ubertini” (IZSLER), Via Antonio Bianchi 7/9, 25124 Brescia, Italy; (T.T.); (S.S.); (C.T.); (L.A.); (A.G.); (G.S.); (A.B.); (C.R.); (P.P.); (M.G.); (E.S.); (D.L.); (A.L.); (A.M.)
| | - Antonio Lavazza
- Istituto Zooprofilattico Sperimentale della Lombardia e dell’Emilia Romagna “Bruno Ubertini” (IZSLER), Via Antonio Bianchi 7/9, 25124 Brescia, Italy; (T.T.); (S.S.); (C.T.); (L.A.); (A.G.); (G.S.); (A.B.); (C.R.); (P.P.); (M.G.); (E.S.); (D.L.); (A.L.); (A.M.)
| | - Ana Moreno
- Istituto Zooprofilattico Sperimentale della Lombardia e dell’Emilia Romagna “Bruno Ubertini” (IZSLER), Via Antonio Bianchi 7/9, 25124 Brescia, Italy; (T.T.); (S.S.); (C.T.); (L.A.); (A.G.); (G.S.); (A.B.); (C.R.); (P.P.); (M.G.); (E.S.); (D.L.); (A.L.); (A.M.)
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