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Escobar D, González-Olvera G, Gómez-Rivera ÁS, Navarrete-Carballo J, Mis-Ávila P, Baack-Valle R, Escalante G, Reyes-Cabrera G, Correa-Morales F, Che-Mendoza A, Vazquez-Prokopec G, Lenhart A, Manrique-Saide P. Insecticide susceptibility status of Anopheles albimanus populations in historical malaria foci in Quintana Roo, Mexico. Malar J 2024; 23:165. [PMID: 38796456 PMCID: PMC11128101 DOI: 10.1186/s12936-024-04993-0] [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: 02/14/2024] [Accepted: 05/21/2024] [Indexed: 05/28/2024] Open
Abstract
BACKGROUND Mexico has experienced a significant reduction in malaria cases over the past two decades. Certification of localities as malaria-free areas (MFAs) has been proposed as a steppingstone before elimination is achieved throughout the country. The Mexican state of Quintana Roo is a candidate for MFA certification. Monitoring the status of insecticide susceptibility of major vectors is crucial for MFA certification. This study describes the susceptibility status of Anopheles albimanus, main malaria vector, from historically important malaria foci in Quintana Roo, using both phenotypic and genotypic approaches. METHODS Adult mosquito collections were carried out at three localities: Palmar (Municipality of Othon P. Blanco), Buenavista (Bacalar) and Puerto Morelos (Puerto Morelos). Outdoor human-landing catches were performed by pairs of trained staff from 18:00 to 22:00 during 3-night periods at each locality during the rainy season of 2022. Wild-caught female mosquitoes were exposed to diagnostic doses of deltamethrin, permethrin, malathion, pirimiphos-methyl or bendiocarb using CDC bottle bioassays. Mortality was registered at the diagnostic time and recovery was assessed 24 h after exposure. Molecular analyses targeting the Voltage-Gated Sodium Channel (vgsc) gene and acetylcholinesterase (ace-1) gene were used to screen for target site polymorphisms. An SNP analysis was carried out to identify mutations at position 995 in the vgsc gene and at position 280 in the ace-1 gene. RESULTS A total of 2828 anophelines were collected. The main species identified were Anopheles albimanus (82%) and Anopheles vestitipennis (16%). Mortalities in the CDC bottle bioassay ranged from 99% to 100% for all the insecticides and mosquito species. Sequence analysis was performed on 35 An. albimanus across the three localities; of those, 25 were analysed for vgsc and 10 for ace-1 mutations. All individuals showed wild type alleles. CONCLUSION The results demonstrated that An. albimanus populations from historical malaria foci in Quintana Roo are susceptible to the main insecticides used by the Ministry of Health.
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Affiliation(s)
- Denis Escobar
- Unidad Colaborativa de Bioensayos Entomológicos, Campus de Ciencias Biológicas y Agropecuarias, Universidad Autónoma de Yucatán, Mérida, Yucatán, Mexico
- Instituto de Investigaciones en Microbiología, Facultad de Ciencias, Universidad Nacional Autónoma de Honduras, Tegucigalpa, Honduras
| | - Gabriela González-Olvera
- Unidad Colaborativa de Bioensayos Entomológicos, Campus de Ciencias Biológicas y Agropecuarias, Universidad Autónoma de Yucatán, Mérida, Yucatán, Mexico
| | | | - Juan Navarrete-Carballo
- Unidad Colaborativa de Bioensayos Entomológicos, Campus de Ciencias Biológicas y Agropecuarias, Universidad Autónoma de Yucatán, Mérida, Yucatán, Mexico
| | - Pedro Mis-Ávila
- Servicios Estatales de Salud de Quintana Roo, Chetumal, Quintana Roo, Mexico
| | - Raquel Baack-Valle
- Servicios Estatales de Salud de Quintana Roo, Chetumal, Quintana Roo, Mexico
| | - Guillermo Escalante
- Servicios Estatales de Salud de Quintana Roo, Chetumal, Quintana Roo, Mexico
| | - Gerardo Reyes-Cabrera
- Centro Nacional de Programas Preventivos y Control de Enfermedades, Secretaría de Salud, Ciudad de México, Mexico
| | - Fabian Correa-Morales
- Centro Nacional de Programas Preventivos y Control de Enfermedades, Secretaría de Salud, Ciudad de México, Mexico
| | - Azael Che-Mendoza
- Unidad Colaborativa de Bioensayos Entomológicos, Campus de Ciencias Biológicas y Agropecuarias, Universidad Autónoma de Yucatán, Mérida, Yucatán, Mexico
| | | | - Audrey Lenhart
- Entomology Branch, Division of Parasitic Diseases and Malaria, U.S. Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Pablo Manrique-Saide
- Unidad Colaborativa de Bioensayos Entomológicos, Campus de Ciencias Biológicas y Agropecuarias, Universidad Autónoma de Yucatán, Mérida, Yucatán, Mexico.
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Salas-Rojas M, de Oliveira-Filho EF, Almazán-Marín C, Rodas-Martínez AZ, Aguilar-Setién Á, Drexler JF. Serological evidence for potential yellow fever virus infection in non-human primates, southeastern Mexico. ONE HEALTH OUTLOOK 2023; 5:14. [PMID: 37876014 PMCID: PMC10594671 DOI: 10.1186/s42522-023-00090-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Accepted: 10/09/2023] [Indexed: 10/26/2023]
Abstract
BACKGROUND Arthropod-borne flaviviruses like dengue virus (DENV) and yellow fever virus (YFV) are major human pathogens. In Latin America, YFV is maintained in sylvatic cycles involving non-human primates (NHP) and forest-dwelling mosquitos. YFV supposedly does not circulate north of Panama. METHODS We conducted a serologic study for flaviviruses and other emerging viruses in NHP from southeastern Mexico. A total of thirty sera of black-handed spider monkeys (Ateles geoffroyi, n = 25), black howler monkeys (Alouatta pigra, n = 3), and mantled howler monkeys (Al. palliata, n = 2) sampled in 2012 and 2018 were screened by an indirect immunofluorescence assay (IFA) to detected IgG antibodies against DENV, YFV, Zika virus (ZIKV), West Nile virus (WNV), Rift Valley fever virus, Crimean-Congo hemorrhagic fever virus, Middle East respiratory syndrome coronavirus, and Zaire Ebola virus, and confirmed by plaque reduction neutralization tests (PRNT90) representing all mosquito-borne flavivirus serocomplexes circulating in the Americas. RESULTS A total of 16 sera (53.3%; 95% CI, 34.3-71.7) showed IFA reactivity to at least one tested flavivirus with end-point titers ranging from 1:100 to 1:1000. No serum reacted with other viruses. Monotypic and high mean PRNT90 endpoint YFV titers of 1:246 were found in 3 black-handed spider monkey sera (10.0%; 95% CI, 2.1-26.5) sampled in 2018 in Tabasco, compared to all other flaviviruses tested. Monotypic endpoint PRNT90 titers of 1:28 for Ilheus virus and 1:22 for WNV in serum of black howler monkeys sampled in 2018 in Tabasco suggested additional flavivirus exposure. CONCLUSIONS Our findings may suggest unnoticed YFV circulation. Intensification of YFV surveillance in NHP and vectors is warranted in Mexico and potentially other areas considered free of yellow fever.
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Affiliation(s)
- Mónica Salas-Rojas
- UIM en Inmunología, UMAE Hospital de Pediatría, Centro Médico Nacional "Siglo XXI", Instituto Mexicano del Seguro Social, Ciudad de Mexico, México
| | - Edmilson Ferreira de Oliveira-Filho
- Institute of Virology, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität Zu Berlin, Charitéplatz 1, 10117, Berlin, Germany
| | - Cenia Almazán-Marín
- UIM en Inmunología, UMAE Hospital de Pediatría, Centro Médico Nacional "Siglo XXI", Instituto Mexicano del Seguro Social, Ciudad de Mexico, México
| | - Alba Zulema Rodas-Martínez
- División Académica de Ciencias Biológicas, Universidad Juárez Autónoma de Tabasco, Villahermosa, Tabasco, México
| | - Álvaro Aguilar-Setién
- UIM en Inmunología, UMAE Hospital de Pediatría, Centro Médico Nacional "Siglo XXI", Instituto Mexicano del Seguro Social, Ciudad de Mexico, México
| | - Jan Felix Drexler
- Institute of Virology, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität Zu Berlin, Charitéplatz 1, 10117, Berlin, Germany.
- German Centre for Infection Research (DZIF), Associated Partner Site Charité, Berlin, Germany.
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Lippi CA, Mundis SJ, Sippy R, Flenniken JM, Chaudhary A, Hecht G, Carlson CJ, Ryan SJ. Trends in mosquito species distribution modeling: insights for vector surveillance and disease control. Parasit Vectors 2023; 16:302. [PMID: 37641089 PMCID: PMC10463544 DOI: 10.1186/s13071-023-05912-z] [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: 03/17/2023] [Accepted: 08/04/2023] [Indexed: 08/31/2023] Open
Abstract
Species distribution modeling (SDM) has become an increasingly common approach to explore questions about ecology, geography, outbreak risk, and global change as they relate to infectious disease vectors. Here, we conducted a systematic review of the scientific literature, screening 563 abstracts and identifying 204 studies that used SDMs to produce distribution estimates for mosquito species. While the number of studies employing SDM methods has increased markedly over the past decade, the overwhelming majority used a single method (maximum entropy modeling; MaxEnt) and focused on human infectious disease vectors or their close relatives. The majority of regional models were developed for areas in Africa and Asia, while more localized modeling efforts were most common for North America and Europe. Findings from this study highlight gaps in taxonomic, geographic, and methodological foci of current SDM literature for mosquitoes that can guide future efforts to study the geography of mosquito-borne disease risk.
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Affiliation(s)
- Catherine A Lippi
- Quantitative Disease Ecology and Conservation (QDEC) Lab, Department of Geography, University of Florida, Gainesville, FL, 32601, USA.
- Emerging Pathogens Institute, University of Florida, Gainesville, FL, 32601, USA.
| | - Stephanie J Mundis
- Quantitative Disease Ecology and Conservation (QDEC) Lab, Department of Geography, University of Florida, Gainesville, FL, 32601, USA
| | - Rachel Sippy
- Quantitative Disease Ecology and Conservation (QDEC) Lab, Department of Geography, University of Florida, Gainesville, FL, 32601, USA
- School of Mathematics and Statistics, University of St Andrews, St Andrews, KY16 9SS, UK
| | - J Matthew Flenniken
- Quantitative Disease Ecology and Conservation (QDEC) Lab, Department of Geography, University of Florida, Gainesville, FL, 32601, USA
| | - Anusha Chaudhary
- Quantitative Disease Ecology and Conservation (QDEC) Lab, Department of Geography, University of Florida, Gainesville, FL, 32601, USA
| | - Gavriella Hecht
- Quantitative Disease Ecology and Conservation (QDEC) Lab, Department of Geography, University of Florida, Gainesville, FL, 32601, USA
- Emerging Pathogens Institute, University of Florida, Gainesville, FL, 32601, USA
| | - Colin J Carlson
- Center for Global Health Science and Security, Georgetown University Medical Center, Georgetown University, Washington, DC, USA
| | - Sadie J Ryan
- Quantitative Disease Ecology and Conservation (QDEC) Lab, Department of Geography, University of Florida, Gainesville, FL, 32601, USA.
- Emerging Pathogens Institute, University of Florida, Gainesville, FL, 32601, USA.
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Lopez-Solis AD, Solis-Santoyo F, Saavedra-Rodriguez K, Sanchez-Guillen D, Castillo-Vera A, Gonzalez-Gomez R, Rodriguez AD, Penilla-Navarro P. Aedes aegypti, Ae. albopictus and Culex quinquefasciatus Adults Found Coexisting in Urban and Semiurban Dwellings of Southern Chiapas, Mexico. INSECTS 2023; 14:565. [PMID: 37367381 PMCID: PMC10299218 DOI: 10.3390/insects14060565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 06/10/2023] [Accepted: 06/14/2023] [Indexed: 06/28/2023]
Abstract
Tapachula, Mexico, a tropical city, is an endemic area for dengue, in addition to several outbreaks in the last decade with chikungunya and zika. As part of the migratory corridor from Central to North America and the risks of scattered infectious diseases that this implies, the identification and distribution of potential disease vectors in and around residential areas are essential in terms of entomological surveillance for the prevention of disease outbreaks. The identification of mosquito species of medical importance coexisting in houses and cemeteries in Tapachula and two semiurban sites in southern Chiapas was investigated. Adult mosquitoes were collected from May to December 2018, resting inside and outside houses and in the tombstones and fallen tree leaves in cemeteries. A total of 10,883 mosquitoes belonging to three vector species were collected across 20 sites; 6738 were from neighborhood houses, of which 55.4% were Culex quinquefasciatus, 41.6% Aedes aegypti, and 2.9% Ae. albopictus. Aedes aegypti was the most common mosquito resting inside houses (56.7%), while Ae. albopictus and Cx. quinquefasciatus were mostly found resting outside houses (75.7%). In the cemeteries, Cx. quinquefasciatus (60.8%) and Ae. albopictus (37.3%) were the most abundant, while Ae. aegypti (1.9%) was the least abundant. This is the first report to identify adults of three major disease vector species coexisting in the domestic environment of urban and semiurban sites and Ae. albopictus adult resting inside of urban houses in Mexico. It would be opportune to consider comprehensive strategies that can be applied in this region to control the three species at the same time and avoid outbreaks of the diseases they transmit.
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Affiliation(s)
- Alma D. Lopez-Solis
- Centro Regional de Investigación en Salud Pública, Instituto Nacional de Salud Pública, Cuarta Norte y 19 Calle Poniente S/N Colonia Centro, Tapachula 30700, Mexico; (A.D.L.-S.); (A.D.R.)
- El Colegio de la Frontera Sur, Unidad Tapachula. Carretera Antiguo Aeropuerto Km. 2.5, Centro, Tapachula Chiapas 30700, Mexico; (D.S.-G.); (A.C.-V.); (R.G.-G.)
| | - Francisco Solis-Santoyo
- Centro Regional de Investigación en Salud Pública, Instituto Nacional de Salud Pública, Cuarta Norte y 19 Calle Poniente S/N Colonia Centro, Tapachula 30700, Mexico; (A.D.L.-S.); (A.D.R.)
| | - Karla Saavedra-Rodriguez
- Arthropod-Borne and Infectious Diseases Laboratory, Department of Microbiology, Immunology, and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, 1692 Campus Delivery, Fort Collins, CO 80523-1692, USA;
| | - Daniel Sanchez-Guillen
- El Colegio de la Frontera Sur, Unidad Tapachula. Carretera Antiguo Aeropuerto Km. 2.5, Centro, Tapachula Chiapas 30700, Mexico; (D.S.-G.); (A.C.-V.); (R.G.-G.)
| | - Alfredo Castillo-Vera
- El Colegio de la Frontera Sur, Unidad Tapachula. Carretera Antiguo Aeropuerto Km. 2.5, Centro, Tapachula Chiapas 30700, Mexico; (D.S.-G.); (A.C.-V.); (R.G.-G.)
| | - Rebeca Gonzalez-Gomez
- El Colegio de la Frontera Sur, Unidad Tapachula. Carretera Antiguo Aeropuerto Km. 2.5, Centro, Tapachula Chiapas 30700, Mexico; (D.S.-G.); (A.C.-V.); (R.G.-G.)
- Investigadora por México, Consejo Nacional de Humanidades, Ciencias y Tecnologías, Av. Insurgentes Sur 1582, Benito Juárez 03940, Mexico
| | - Americo D. Rodriguez
- Centro Regional de Investigación en Salud Pública, Instituto Nacional de Salud Pública, Cuarta Norte y 19 Calle Poniente S/N Colonia Centro, Tapachula 30700, Mexico; (A.D.L.-S.); (A.D.R.)
| | - Patricia Penilla-Navarro
- Centro Regional de Investigación en Salud Pública, Instituto Nacional de Salud Pública, Cuarta Norte y 19 Calle Poniente S/N Colonia Centro, Tapachula 30700, Mexico; (A.D.L.-S.); (A.D.R.)
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Moo-Llanes DA, Sánchez-Montes S, López-Ordoñez T, Dzul-Rosado K, Segura-Trejo D, Salceda-Sánchez B, Danis-Lozano R. Comparison of Climate Change Scenarios of Rhipicephalus sanguineus sensu lato (Latreille 1806) from México and the Boarders with Central America and the United States. Trop Med Infect Dis 2023; 8:307. [PMID: 37368725 DOI: 10.3390/tropicalmed8060307] [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: 04/03/2023] [Revised: 05/29/2023] [Accepted: 06/01/2023] [Indexed: 06/29/2023] Open
Abstract
In America, the presence of Rhipicephalus sanguineus sensu stricto and Rhipicephalus linnaei has been confirmed. Both species are found in sympatry in the southern United States, northern Mexico, southern Brazil, and Argentina. The objective of this work is to evaluate the projection of the potential distribution of the ecological niche of Rhipicephalus sanguineus sensu lato in two climate change scenarios in Mexico and the border with Central America and the United States. Initially, a database of personal collections of the authors, GBIF, Institute of Epidemiological Diagnosis and Reference, and scientific articles was built. The ENMs were projected for the current period and two future scenarios: RCP and SSP used for the kuenm R package, the ecological niche of R. sanguineus s.l. It is distributed throughout the Mexico and Texas (United States), along with the border areas between Central America, Mexico, and the United States. Finally, it is observed that the ecological niche of R. sanguineus s.l. in the current period coincides in three degrees with the routes of human migration. Based on this information, and mainly on the flow of migrants from Central America to the United States, the risk of a greater gene flow in this area increases, so the risk relating to this border is a latent point that must be analyzed.
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Affiliation(s)
- David A Moo-Llanes
- Centro Regional de Investigación en Salud Pública, Instituto Nacional de Salud Pública, Tapachula 30700, Mexico
| | - Sokani Sánchez-Montes
- Centro de Medicina Tropical, Unidad de Investigación en Medicina Experimental, Universidad Nacional Autónoma de México, Ciudad de México 04510, Mexico
- Facultad de Ciencias Biológicas y Agropecuarias Región Tuxpán, Universidad Veracruzana, Tuxpán de Rodríguez Cano 92870, Mexico
| | - Teresa López-Ordoñez
- Centro Regional de Investigación en Salud Pública, Instituto Nacional de Salud Pública, Tapachula 30700, Mexico
| | - Karla Dzul-Rosado
- Centro de Investigaciones Regionales Dr. Hideyo Noguchi, Universidad Autónoma de Yucatan, Merida 97000, Mexico
| | - Daniela Segura-Trejo
- Centro de Medicina Tropical, Unidad de Investigación en Medicina Experimental, Universidad Nacional Autónoma de México, Ciudad de México 04510, Mexico
| | - Beatriz Salceda-Sánchez
- Laboratorio de Entomología, Instituto de Diagnóstico y Referencia Epidemiológicos, Secretaría de Salud, Ciudad de México 01480, Mexico
| | - Rogelio Danis-Lozano
- Centro Regional de Investigación en Salud Pública, Instituto Nacional de Salud Pública, Tapachula 30700, Mexico
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Moo-Llanes DA, López-Ordóñez T, Torres-Monzón JA, Mosso-González C, Casas-Martínez M, Samy AM. Assessing the Potential Distributions of the Invasive Mosquito Vector Aedes albopictus and Its Natural Wolbachia Infections in México. INSECTS 2021; 12:insects12020143. [PMID: 33562305 PMCID: PMC7914640 DOI: 10.3390/insects12020143] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 01/27/2021] [Accepted: 01/29/2021] [Indexed: 12/11/2022]
Abstract
The Asian tiger mosquito Aedes albopictus is currently the most invasive vector species, with a widespread global distribution. Aedes albopictus is the potential vector of diverse arboviruses, including Zika and dengue. This study updated the ecological niche model of Ae. albopictus and inferred the potential distribution of natural Wolbachia infections in Ae. albopictus in México. The ecological niche models were constructed based on diverse model settings to better estimate the potential distributions and uncertainty indices of both Ae. albopictus and its natural Wolbachia infections in México. The distribution of Ae. albopictus covered the states across Northern México, the Gulf of México, the Pacific Coast of México, Central México, and the southeast of México. The ecological niche model of the natural Wolbachia infections in Ae. albopictus populations anticipated the occurrence of natural Wolbachia infections in the southeast of México, the Chiapas border with Guatemala, and Veracruz. These results can be used to prioritize vector surveillance and control programs in México for strategic and future decision-making; however, it is still necessary to establish active surveillance programs to assess model predictions based on the independent sampling of Ae. albopictus from different invasion zones in México. Finally, vector surveillance should also screen the natural Wolbachia infections in Ae. albopictus to validate Wolbachia predictions across México, particularly in the southeast of México.
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Affiliation(s)
- David A. Moo-Llanes
- Centro Regional de Investigación en Salud Pública (CRISP), Instituto Nacional de Salud Pública (INSP), Tapachula, Chiapas 30700, Mexico; (D.A.M.-L.); (T.L.-O.); (J.A.T.-M.); (C.M.-G.)
| | - Teresa López-Ordóñez
- Centro Regional de Investigación en Salud Pública (CRISP), Instituto Nacional de Salud Pública (INSP), Tapachula, Chiapas 30700, Mexico; (D.A.M.-L.); (T.L.-O.); (J.A.T.-M.); (C.M.-G.)
| | - Jorge A. Torres-Monzón
- Centro Regional de Investigación en Salud Pública (CRISP), Instituto Nacional de Salud Pública (INSP), Tapachula, Chiapas 30700, Mexico; (D.A.M.-L.); (T.L.-O.); (J.A.T.-M.); (C.M.-G.)
| | - Clemente Mosso-González
- Centro Regional de Investigación en Salud Pública (CRISP), Instituto Nacional de Salud Pública (INSP), Tapachula, Chiapas 30700, Mexico; (D.A.M.-L.); (T.L.-O.); (J.A.T.-M.); (C.M.-G.)
| | - Mauricio Casas-Martínez
- Centro Regional de Investigación en Salud Pública (CRISP), Instituto Nacional de Salud Pública (INSP), Tapachula, Chiapas 30700, Mexico; (D.A.M.-L.); (T.L.-O.); (J.A.T.-M.); (C.M.-G.)
- Correspondence: (M.C.-M.); (A.M.S.)
| | - Abdallah M. Samy
- Entomology Department, Faculty of Science, Ain Shams University, Abbassia, Cairo 11566, Egypt
- Correspondence: (M.C.-M.); (A.M.S.)
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Marina CF, Bond JG, Hernández-Arriaga K, Valle J, Ulloa A, Fernández-Salas I, Carvalho DO, Bourtzis K, Dor A, Williams T, Liedo P. Population Dynamics of Aedes aegypti and Aedes albopictus in Two Rural Villages in Southern Mexico: Baseline Data for an Evaluation of the Sterile Insect Technique. INSECTS 2021; 12:58. [PMID: 33440870 PMCID: PMC7827525 DOI: 10.3390/insects12010058] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 01/06/2021] [Accepted: 01/07/2021] [Indexed: 12/11/2022]
Abstract
Indoor and outdoor ovitraps were placed in 15 randomly selected houses in two rural villages in Chiapas, southern Mexico. In addition, ovitraps were placed in five transects surrounding each village, with three traps per transect, one at the edge, one at 50 m, and another at 100 m from the edge of the village. All traps were inspected weekly. A transect with eight traps along a road between the two villages was also included. Population fluctuations of Aedes aegypti and Ae. albopictus were examined during 2016-2018 by counting egg numbers. A higher number of Aedes spp. eggs was recorded at Hidalgo village with 257,712 eggs (60.9%), of which 58.1% were present in outdoor ovitraps and 41.9% in indoor ovitraps, compared with 165,623 eggs (39.1%) collected in the village of Río Florido, 49.0% in outdoor and 51.0% in indoor ovitraps. A total of 84,047 eggs was collected from ovitraps placed along transects around Río Florido, compared to 67,542 eggs recorded from transects around Hidalgo. Fluctuations in egg counts were associated with annual variation in precipitation, with 2.3 to 3.2-fold more eggs collected from ovitraps placed in houses and 4.8 to 5.1-fold more eggs in ovitraps from the surrounding transects during the rainy season than in the dry season, respectively. Aedes aegypti was the dominant species during the dry season and at the start of the rainy season in both villages. Aedes albopictus populations were lower for most of the dry season, but increased during the rainy season and predominated at the end of the rainy season in both villages. Aedes albopictus was also the dominant species in the zones surrounding both villages. The numbers of eggs collected from intradomiciliary ovitraps were strongly correlated with the numbers of eggs in peridomiciliary ovitraps in both Río Florido (R2 adj = 0.92) and Hidalgo (R2 adj = 0.94), suggesting that peridomiciliary sampling could provide an accurate estimate of intradomiciliary oviposition by Aedes spp. in future studies in these villages. We conclude that the feasibility of sterile insect technique (SIT)-based program of vector control could be evaluated in the isolated Ae. aegypti populations in the rural villages of our baseline study.
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Affiliation(s)
- Carlos F. Marina
- Centro Regional de Investigación en Salud Pública-INSP, Tapachula, Chiapas 30700, Mexico; (J.G.B.); (K.H.-A.); (A.U.); (I.F.-S.)
| | - J. Guillermo Bond
- Centro Regional de Investigación en Salud Pública-INSP, Tapachula, Chiapas 30700, Mexico; (J.G.B.); (K.H.-A.); (A.U.); (I.F.-S.)
| | - Kenia Hernández-Arriaga
- Centro Regional de Investigación en Salud Pública-INSP, Tapachula, Chiapas 30700, Mexico; (J.G.B.); (K.H.-A.); (A.U.); (I.F.-S.)
| | - Javier Valle
- El Colegio de la Frontera Sur (ECOSUR), Tapachula, Chiapas 30700, Mexico; (J.V.); (A.D.); (P.L.)
| | - Armando Ulloa
- Centro Regional de Investigación en Salud Pública-INSP, Tapachula, Chiapas 30700, Mexico; (J.G.B.); (K.H.-A.); (A.U.); (I.F.-S.)
- Facultad de Ciencias Químicas, Universidad Autónoma de Chiapas (UNACH), Tapachula, Chiapas 30700, Mexico
| | - Ildefonso Fernández-Salas
- Centro Regional de Investigación en Salud Pública-INSP, Tapachula, Chiapas 30700, Mexico; (J.G.B.); (K.H.-A.); (A.U.); (I.F.-S.)
- Facultad de Ciencias Biológicas, Universidad Autónoma de Nuevo León (UANL), San Nicolás de los Garza, Nuevo León 66450, Mexico
| | - Danilo O. Carvalho
- Insect Pest Control Laboratory, Joint FAO/IAEA Programme of Nuclear Techniques in Food and Agriculture, IAEA Laboratories, 2444 Seibersdorf, Austria; (D.O.C.); (K.B.)
| | - Kostas Bourtzis
- Insect Pest Control Laboratory, Joint FAO/IAEA Programme of Nuclear Techniques in Food and Agriculture, IAEA Laboratories, 2444 Seibersdorf, Austria; (D.O.C.); (K.B.)
| | - Ariane Dor
- El Colegio de la Frontera Sur (ECOSUR), Tapachula, Chiapas 30700, Mexico; (J.V.); (A.D.); (P.L.)
| | - Trevor Williams
- Instituto de Ecología AC (INECOL), Xalapa, Veracruz 91073, Mexico;
| | - Pablo Liedo
- El Colegio de la Frontera Sur (ECOSUR), Tapachula, Chiapas 30700, Mexico; (J.V.); (A.D.); (P.L.)
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