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Loshouarn H, Guarneri AA. The interplay between temperature, Trypanosoma cruzi parasite load, and nutrition: Their effects on the development and life-cycle of the Chagas disease vector Rhodnius prolixus. PLoS Negl Trop Dis 2024; 18:e0011937. [PMID: 38306403 PMCID: PMC10866482 DOI: 10.1371/journal.pntd.0011937] [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: 06/20/2023] [Revised: 02/14/2024] [Accepted: 01/23/2024] [Indexed: 02/04/2024] Open
Abstract
Chagas disease, caused by the protozoan parasite Trypanosoma cruzi transmitted by blood-sucking insects of the subfamily Triatominae, is a major neglected tropical disease affecting 6 to 7 million of people worldwide. Rhodnius prolixus, one of the most important vectors of Chagas disease in Latin America, is known to be highly sensitive to environmental factors, including temperature. This study aimed to investigate the effects of different temperatures on R. prolixus development and life-cycle, its relationship with T. cruzi, and to gather information about the nutritional habits and energy consumption of R. prolixus. We exposed uninfected and infected R. prolixus to four different temperatures ranging from 24°C to 30°C, and monitored their survival, developmental rate, body and blood meal masses, urine production, and the temporal dynamics of parasite concentration in the excreted urine of the triatomines over the course of their development. Our results demonstrate that temperature significantly impacts R. prolixus development, life-cycle and their relationship with T. cruzi, as R. prolixus exposed to higher temperatures had a shorter developmental time and a higher mortality rate compared to those exposed to lower temperatures, as well as a lower ability to retain weight between blood meals. Infection also decreased the capacity of the triatomines to retain weight gained by blood-feeding to the next developmental stage, and this effect was proportional to parasite concentration in excreted urine. We also showed that T. cruzi multiplication varied depending on temperature, with the lowest temperature having the lowest parasite load. Our findings provide important insights into the potential impact of climate change on the epidemiology of Chagas disease, and can contribute to efforts to model the future distribution of this disease. Our study also raises new questions, highlighting the need for further research in order to understand the complex interactions between temperature, vector biology, and parasite transmission.
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Affiliation(s)
- Henri Loshouarn
- Vector Behavior and Pathogen Interaction Group, Instituto René Rachou, Fundação Oswaldo Cruz-FIOCRUZ, Belo Horizonte, Brazil
| | - Alessandra A. Guarneri
- Vector Behavior and Pathogen Interaction Group, Instituto René Rachou, Fundação Oswaldo Cruz-FIOCRUZ, Belo Horizonte, Brazil
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Testai R, Ferreira de Siqueira M, Rocha DSB, Roque ALR, Jansen AM, Xavier SCDC. Space-environment relationship in the identification of potential areas of expansion of Trypanosoma cruzi infection in Didelphis aurita in the Atlantic Rainforest. PLoS One 2023; 18:e0288595. [PMID: 37506103 PMCID: PMC10381050 DOI: 10.1371/journal.pone.0288595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Accepted: 06/29/2023] [Indexed: 07/30/2023] Open
Abstract
Ecological Niche Modeling is widely used for animals, but rarely for understanding the parasite ecology. Trypanosoma cruzi is a heterogeneous and widely dispersed multi-host parasite. Didelphis aurita is a generalist species, both in terms of diet and environments. We modeled the D. aurita niche and T. cruzi infection in the Brazilian Atlantic Rainforest, using the models of two common vector species (Triatoma vitticeps and Panstrongylus megistus) as biotic variables, predicting their occurrence. Records of T. cruzi infected and non-infected D. aurita were analyzed through climate and landscape approaches by the Ecoland method. Models for each triatomine species and infected and noninfected D. aurita were produced considering climate and landscape: resolution of ~1km2 selected by Pearson's correlation [-0.7≤α≤0.7]. For modeling, seven algorithms available in ModleR package were used. True Skill Statistic was used to evaluate the models' performance (≥ 0.7). T. vitticeps indicates that there is a spatial dependence with warm areas in the southeastern region while P. megistus presented a distribution with high environmental suitability concentrated in the Southeast. High values of climatic suitability, landscape and potential presence of T. vitticeps and P. megistus were considered necessary, but not sufficient for the presence of D. aurita infected by T. cruzi. Climate models showed an ecological niche with suitability variations homogeneous, and landscape models showed a distribution of habitat conditions along the biome, with a fragmented profile and heterogeneous between locations. Ecoland demonstrated that D. aurita has different degrees of impact on its role in the enzootic cycle in different locations of the Atlantic Rainforest. Associating the models with the Ecoland method allowed the recognition of areas where D. aurita are important T. cruzi reservoirs. Areas of high suitability for the presence of marsupials are a necessary, but not sufficient for D. aurita to act as a reservoir for T. cruzi.
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Affiliation(s)
- Raphael Testai
- Laboratory of Tripanosomatid Biology, Oswaldo Cruz Institute, Oswaldo Cruz Foundation (FIOCRUZ), Rio de Janeiro, Brazil
- The Graduate Program in Computational and Systems Biology of the Instituto Oswaldo Cruz (PGBCS/IOC/Fiocruz), Rio de Janeiro/RJ, Brazil
| | | | | | - Andre Luiz Rodrigues Roque
- Laboratory of Tripanosomatid Biology, Oswaldo Cruz Institute, Oswaldo Cruz Foundation (FIOCRUZ), Rio de Janeiro, Brazil
| | - Ana Maria Jansen
- Laboratory of Tripanosomatid Biology, Oswaldo Cruz Institute, Oswaldo Cruz Foundation (FIOCRUZ), Rio de Janeiro, Brazil
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Méndez-Cardona S, Ortiz MI, Carrasquilla MC, Fuya P, Guhl F, González C. Altitudinal distribution and species richness of triatomines (Hemiptera:Reduviidae) in Colombia. Parasit Vectors 2022; 15:450. [PMID: 36463194 PMCID: PMC9719156 DOI: 10.1186/s13071-022-05574-3] [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: 06/28/2022] [Accepted: 10/05/2022] [Indexed: 12/04/2022] Open
Abstract
BACKGROUND Chagas disease is considered to be endemic in up to 40% of the territory of Colombia, and to date 27 triatomine species have been reported the country. The purpose of this study was to update the geographical distribution of triatomine species in Colombia and assess the species richness patterns and their altitudinal distribution. METHODS Occurrence data were compiled between 2007 and 2020, including from reports of entomological surveillance from the Instituto Nacional de Salud (INS), the Centro de Investigaciones en Microbiología y Parasitología Tropical (CIMPAT) at Universidad de Los Andes and a review of the literature. Geographic Information Systems (GIS) were used to describe general species richness patterns of the Triatominae subfamily. To establish the altitudinal distribution of the triatomine species, ranges were obtained from reports with unique elevation values. A generalized linear model was fitted, based on a Poisson distribution, to test the relation between triatomine species richness and Chagas disease cases (2012-2019). RESULTS An updated geographical and altitudinal distribution for triatomine species in Colombia was established, with 507 municipalities added to the previously known distributions. The greatest triatomine richness in Colombia was found to be concentrated in the northeastern region of the country, extending towards the center to the departments of Arauca, Casanare and Meta. Regarding the altitudinal distribution, the study revealed that the species Rhodnius prolixus and Triatoma dimidiata have the greatest altitudinal ranges. The data also suggest a positive relation between species richness and number of Chagas disease cases reported per department. CONCLUSIONS Altitudinal ranges for 17 triatomine species found in Colombia are presented. Species richness and species composition patterns are also described, and areas with a higher risk of transmission based on the relation found with Chagas disease cases are highlighted. This updated distribution reveals that Panstrongylus geniculatus is the triatomine with the largest presence by municipalities in Colombia, being reported in 284 municipalities, followed by Rhodnius prolixus in 277 municipalities.
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Affiliation(s)
- Sergio Méndez-Cardona
- grid.419226.a0000 0004 0614 5067Grupo de Entomología, Instituto Nacional de Salud, Bogotá, Colombia ,grid.7247.60000000419370714Centro de Investigaciones en Microbiología Y Parasitología Tropical, Universidad de los Andes, Bogotá, Colombia
| | - Mario I. Ortiz
- grid.7247.60000000419370714Centro de Investigaciones en Microbiología Y Parasitología Tropical, Universidad de los Andes, Bogotá, Colombia
| | - María Cristina Carrasquilla
- grid.7247.60000000419370714Centro de Investigaciones en Microbiología Y Parasitología Tropical, Universidad de los Andes, Bogotá, Colombia
| | - Patricia Fuya
- grid.419226.a0000 0004 0614 5067Grupo de Entomología, Instituto Nacional de Salud, Bogotá, Colombia
| | - Felipe Guhl
- grid.7247.60000000419370714Centro de Investigaciones en Microbiología Y Parasitología Tropical, Universidad de los Andes, Bogotá, Colombia
| | - Camila González
- grid.7247.60000000419370714Centro de Investigaciones en Microbiología Y Parasitología Tropical, Universidad de los Andes, Bogotá, Colombia
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Gual-Gonzalez L, Medina M, Valverde-Castro C, Beltrán V, Caro R, Triana-Chávez O, Nolan MS, Cantillo-Barraza O. Laboratory Evaluation and Field Feasibility of Micro-Encapsulated Insecticide Effect on Rhodnius prolixus and Triatoma dimidiata Mortality in Rural Households in Boyacá, Colombia. INSECTS 2022; 13:insects13111061. [PMID: 36421964 PMCID: PMC9697714 DOI: 10.3390/insects13111061] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 11/02/2022] [Accepted: 11/03/2022] [Indexed: 06/02/2023]
Abstract
Chagas disease is a neglected vector-borne zoonosis caused by the parasite Trypanosoma cruzi that is primarily transmitted by insects of the subfamily Triatominae. Although control efforts targeting domestic infestations of Rhodnius prolixus have been largely successful, with several regions in Boyacá department certified free of T. cruzi transmission by intradomicile R. prolixus, novel native species are emerging, increasing the risk of disease. Triatoma dimidiata is the second most important species in Colombia, and conventional control methods seem to be less effective. In this study we evaluated the efficacy and usefulness of micro-encapsulated insecticide paints in laboratory conditions and its applicability in rural communities to avoid triatomine domiciliation. Laboratory conditions measured mortality at 6 months and 12 months, with an average mortality between 93-100% for T. dimidiata and 100% for R. prolixus. Evaluation of triatomine infestation in rural households was measured after one year, with an overall perception of effectiveness in reducing household domiciliation. Although triatomines were still spotted inside and around the homes, our findings demonstrate the ability of micro-encapsulated insecticide to prevent colonization inside the households when comparing infestation rates from previous years. Current control measures suggest insecticide spraying every six months, which implies great economic cost and logistical effort. Complementary triatomine control measures with insecticide spraying and micro-encapsulated insecticide paint would make public health efforts more efficient and reduce the frequency of treatment.
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Affiliation(s)
- Lídia Gual-Gonzalez
- Arnold School of Public Health, University of South Carolina, Columbia, SC 29208, USA
| | - Manuel Medina
- Unidad de Control de Enfermedades Transmitidas por Vectores, Secretaría de Salud Boyacá, Tunja 150001, Colombia
| | - César Valverde-Castro
- Grupo de Investigación en Medicina Tropical, Universidad del Magdalena, Santa Marta 470003, Colombia
- Grupo Biología y Control Enfermedades Infecciosas, Universidad Antioquia, Medellín 050010, Colombia
| | - Virgilio Beltrán
- Unidad de Control de Enfermedades Transmitidas por Vectores, Secretaría de Salud Boyacá, Tunja 150001, Colombia
| | - Rodrigo Caro
- Unidad de Control de Enfermedades Transmitidas por Vectores, Secretaría de Salud Boyacá, Tunja 150001, Colombia
| | - Omar Triana-Chávez
- Grupo Biología y Control Enfermedades Infecciosas, Universidad Antioquia, Medellín 050010, Colombia
| | - Melissa S. Nolan
- Arnold School of Public Health, University of South Carolina, Columbia, SC 29208, USA
| | - Omar Cantillo-Barraza
- Grupo Biología y Control Enfermedades Infecciosas, Universidad Antioquia, Medellín 050010, Colombia
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Ledien J, Cucunubá ZM, Parra-Henao G, Rodríguez-Monguí E, Dobson AP, Basáñez MG, Nouvellet P. Spatiotemporal variations in exposure: Chagas disease in Colombia as a case study. BMC Med Res Methodol 2022; 22:13. [PMID: 35027002 PMCID: PMC8759231 DOI: 10.1186/s12874-021-01477-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Accepted: 11/15/2021] [Indexed: 11/29/2022] Open
Abstract
Age-stratified serosurvey data are often used to understand spatiotemporal trends in disease incidence and exposure through estimating the Force-of-Infection (FoI). Typically, median or mean FoI estimates are used as the response variable in predictive models, often overlooking the uncertainty in estimated FoI values when fitting models and evaluating their predictive ability. To assess how this uncertainty impact predictions, we compared three approaches with three levels of uncertainty integration. We propose a performance indicator to assess how predictions reflect initial uncertainty. In Colombia, 76 serosurveys (1980–2014) conducted at municipality level provided age-stratified Chagas disease prevalence data. The yearly FoI was estimated at the serosurvey level using a time-varying catalytic model. Environmental, demographic and entomological predictors were used to fit and predict the FoI at municipality level from 1980 to 2010 across Colombia. A stratified bootstrap method was used to fit the models without temporal autocorrelation at the serosurvey level. The predictive ability of each model was evaluated to select the best-fit models within urban, rural and (Amerindian) indigenous settings. Model averaging, with the 10 best-fit models identified, was used to generate predictions. Our analysis shows a risk of overconfidence in model predictions when median estimates of FoI alone are used to fit and evaluate models, failing to account for uncertainty in FoI estimates. Our proposed methodology fully propagates uncertainty in the estimated FoI onto the generated predictions, providing realistic assessments of both central tendency and current uncertainty surrounding exposure to Chagas disease.
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Affiliation(s)
- Julia Ledien
- School of Life Sciences, University of Sussex, Brighton, UK.
| | - Zulma M Cucunubá
- London Centre for Neglected Tropical Disease Research & MRC Centre for Global Infectious Disease Analysis, Imperial College London, London, UK.,Departamento de Epidemiología Clínica y Bioestadística, Facultad de Medicina, Universidad Javeriana, Bogotá, Colombia
| | - Gabriel Parra-Henao
- Centro de Investigación en Salud para el Trópico, Universidad Cooperativa de Colombia, Santa Marta, Colombia.,National Institute of Health, Bogotá, Colombia
| | - Eliana Rodríguez-Monguí
- Neglected, Tropical and Vector Borne Diseases Program, Pan American Health Organization (PAHO), Bogotá, Colombia
| | - Andrew P Dobson
- Ecology & Evolutionary Biology, Princeton University, Princeton, USA
| | - María-Gloria Basáñez
- London Centre for Neglected Tropical Disease Research & MRC Centre for Global Infectious Disease Analysis, Imperial College London, London, UK
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Dario MA, Maranhão PHC, Dos Santos GQ, Rocha MDM, Falqueto A, Da Silva LFCF, Jansen AM, Das Chagas Xavier SC. Environmental influence on <em>Triatoma vitticeps</em> occurrence and <em>Trypanosoma cruzi</em> infection in the Atlantic Forest of south-eastern Brazil. GEOSPATIAL HEALTH 2021; 16. [PMID: 34726032 DOI: 10.4081/gh.2021.997] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Accepted: 05/26/2021] [Indexed: 06/13/2023]
Abstract
Trypanosoma cruzi requires a triatomine insect vector for its life cycle, which can be complex in different enzootic scenarios, one of which is the unique transmission network in the Atlantic Forest of south-eastern Brazil. In Espírito Santo (ES) State, highly infected Triatoma vitticeps are frequently reported invading domiciles. However, triatomines were not found colonizing residences and mammals in the surrounding areas did not present T. cruzi infection. To date, the biotic and abiotic variables that modulate T. vitticeps occurrence and T. cruzi infection in ES State are still unknown. The aim of this study was to identify the environmental variables that modulate their occurrence. Local thematic maps were generated for two response variables: T. vitticeps occurrence and T. cruzi infection. The following explanatory variables were tested: climate (temperature, relative air humidity and rainfall), altitude elevation, mammalian species richness as well as soil and vegetation types. Spatiotemporal distribution patterns and correlation levels between response and explanatory variables were assessed through spatial statistics and map algebra modelling. The central and southern mesoregions presented higher T. vitticeps and T. cruzi distributions and can be considered transmission hotspots. The explanatory variables that can explain these phenomena were relative air humidity, average temperature, soil type, altitude elevation and mammalian species richness. Algebra map modelling demonstrated that central and southern mesoregions presented the environmental conditions needed for T. vitticeps occurrence and T. cruzi infection. The consideration of environmental variables is essential for understanding the T. cruzi transmission cycle. Cartographic and statistical methodologies used in parasitology have been demonstrated to be reliable and enlightening tools that should be incorporated routinely to expand the understanding of vector-borne parasite transmission.
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Affiliation(s)
- Maria Augusta Dario
- Laboratory of Trypanosomatid Biology, Oswaldo Cruz Institute, Oswaldo Cruz Foundation, Rio de Janeiro, Rio de Janeiro.
| | | | | | - Marcos de Meneses Rocha
- Department of Cartographic Engineering, Military Institute of Engineering, Rio de Janeiro, Rio de Janeiro.
| | - Aloísio Falqueto
- Tropical Medicine Unit, Federal University of Espírito Santo, Vitória, Espírito Santo; Department of Pathology, Federal University of Espírito Santo, Vitória, Espírito Santo.
| | | | - Ana Maria Jansen
- Laboratory of Trypanosomatid Biology, Oswaldo Cruz Institute, Oswaldo Cruz Foundation, Rio de Janeiro, Rio de Janeiro.
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Guzmán-Gómez D, Salas-González G, López-Monteon A, Welsh-Rodríguez CM, Torres-Montero J, Dumonteil E, Waleckx E, Ramos-Ligonio A. Risk factors for infestation by Triatoma dimidiata in a rural locality of Veracruz, Mexico, with active transmission of Trypanosoma cruzi: weather and rain as factors. Trop Med Int Health 2021; 26:916-926. [PMID: 33860616 DOI: 10.1111/tmi.13589] [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] [Indexed: 11/30/2022]
Abstract
OBJECTIVE To analyse the ecological and social factors involved in infestation of houses by Triatoma dimidiata in a rural locality of Veracruz, Mexico, where active transmission of the parasite is occurring. METHODS A survey was applied to the households of the locality to obtain sociodemographic data. In parallel, T. dimidiata insects were collected during one year through community participation. Using PCR, the insects were genotyped, their infection status was assessed, and parasite genotypes infecting the insects were identified. The vector's blood meal sources were identified using a polymerase-heteroduplex chain reaction assay. RESULTS Seasonal variations in the patterns of infestation by T. dimidiata were observed. An overall infestation rate of 19.46%, a colonisation index of 9.09%, a dispersion rate of 22.15% and a synanthropy index of 80.6% were found. The collected insects were identified as ITS-2 group 2 insects, and a natural infection with T. cruzi of 54.35% was found. TcI and no-TcI genotypes of T. cruzi were found in infected insects. Factors such as rain (P = 0.0006) and temperature (P < 0.0001) were associated with infestation. Analysis of the blood meal sources indicated frequent feeding upon humans and mice. Furthermore, house materials and peridomiciles were found to play an important role in the dynamics of infestation. CONCLUSIONS The contribution of this study is important for understanding the epidemiology of Chagas disease in rural areas of the state of Veracruz and will help to the establishment of an entomological surveillance system and implementation of prevention and control measures in accordance with the reality of the area.
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Affiliation(s)
- Daniel Guzmán-Gómez
- LADISER Inmunología y Biología Molecular, Facultad de Ciencias Químicas, Universidad Veracruzana, Veracruz, México
| | | | - Aracely López-Monteon
- LADISER Inmunología y Biología Molecular, Facultad de Ciencias Químicas, Universidad Veracruzana, Veracruz, México
| | | | - Jesús Torres-Montero
- LADISER Inmunología y Biología Molecular, Facultad de Ciencias Químicas, Universidad Veracruzana, Veracruz, México
| | - Eric Dumonteil
- Department of Tropical Medicine, Tulane University, New Orleans, USA
| | - Etienne Waleckx
- Institut de Recherche pour le Développement, UMR INTERTRYP IRD, CIRAD, Université de Montpellier, Montpellier, France.,Laboratorio de Parasitología, Centro de Investigaciones Regionales "Dr. Hideyo Noguchi", Universidad Autónoma de Yucatán, Mérida, México
| | - Angel Ramos-Ligonio
- LADISER Inmunología y Biología Molecular, Facultad de Ciencias Químicas, Universidad Veracruzana, Veracruz, México
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Parra-Henao G, Garzón-Jiménez SP, Bernal-Rosas Y, Olivera MJ, Salgado M, Torres-García OA. Risk factors for triatominae infestation in a municipality of Colombia. Ther Adv Infect Dis 2021; 8:20499361211030068. [PMID: 34290865 PMCID: PMC8274114 DOI: 10.1177/20499361211030068] [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: 12/12/2020] [Accepted: 06/16/2021] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Identifying risk factors for Triatominae infestation is essential for the development of vector control interventions. METHODS To determine the intra- and peridomiciliary risk factors associated with triatomine infestation, a cross-sectional analytical study was carried out with random cluster sampling in two stages, which included the identification of risk factors by survey and direct observation, as well as the search and capture of triatomines. The detection of trypanosomes in triatomines was carried out by observing the rectal content and then by conventional polymerase chain reaction (PCR). RESULTS In 21 of the 207 houses inspected, 13 specimens of R. colombiensis and 19 specimens of P. geniculatus were found. Entomological indices included: dispersion 36%, infestation 10%, infection 65%, colonization 4.7%, density 15%, and concentration 152%. An association was found between the presence of Triatominae and the existence of branches and fissures in the floors, as well as with the presence of accumulated objects and with knowledge about Chagas disease. The risk of having triatomines in urban homes is 5.7 times higher than the risk in rural areas [confidence interval (CI) 0.508-67.567]; 6.6 times in houses with cracked soil (CI 0.555-81.994), 6 times in houses located near caneys (CI 0.820-44.781), and 6.16 times with accumulated objects (CI 1.542-39.238). CONCLUSION Chagas disease is a complex problem that requires control based on the vector's elimination or surveillance, which implies identifying species and their distribution, generating alerts, knowledge, and awareness in the population. It is necessary to intensify surveillance activities for the event, especially in changing aspects of Chagas diseases' transmission dynamics, such as urbanization and the type of housing associated with the vector's presence.
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Affiliation(s)
- Gabriel Parra-Henao
- Instituto Nacional de Salud, Bogotá, Colombia
- Centro de Investigación en Salud para el Trópico, Universidad Cooperativa de Colombia, Santa Marta, Magdalena, Colombia
| | - Sandra P. Garzón-Jiménez
- Facultad de Medicina Veterinaria, Universidad Antonio Nariño, Sede Circunvalar - Bogotá, Colombia
| | - Yuly Bernal-Rosas
- Facultad de Ciencias, Universidad Antonio Nariño, Sede Circunvalar - Bogotá, Colombia
| | - Mario J. Olivera
- Grupo de Parasitología, Instituto Nacional de Salud, Bogotá, Colombia
| | - Marlon Salgado
- Alcaldía Municipal de La Mesa – La Mesa, Cundinamarca, Colombia
| | - Orlando A. Torres-García
- Facultad de Medicina Veterinaria, Universidad Antonio Nariño, Sede Circunvalar - Bogotá, Colombia
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Moo-Llanes DA, Montes de Oca-Aguilar AC, Rodríguez-Rojas JJ. Pattern of climate connectivity and equivalent niche of Triatominae species of the Phyllosoma complex. MEDICAL AND VETERINARY ENTOMOLOGY 2020; 34:440-451. [PMID: 32697402 DOI: 10.1111/mve.12461] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 06/03/2020] [Accepted: 06/17/2020] [Indexed: 06/11/2023]
Abstract
The Phyllosoma complex is a Triatominae (Hemiptera: Reduviidae) group of medical importance involved in Trypanosoma cruzi (Kinetoplastida: Trypanosomatidae) transmission. Most of the members of this group are endemic and sympatric species with distribution in Mexico and the southern U.S.A. We employed MaxEnt to construct ecological niche models of nine species of Triatominae to test three hypothesis: (a) whether species with a broad climatic niche breadth occupy a broader geographical range than species with a narrow climatic breadth, (b) whether species with broad distribution present high degree of climatic fragmentation/isolation, which was tested through landscape metrics; and (c) whether the species share the same climatic niche space (niche conservatism) considered through an equivalence test implemented in ENMtools. Overall, our results suggest that the geographical distribution of this complex is influenced mainly by temperature seasonality where all suitable areas are places of current and potential transmission of T. cruzi. Niche breadth in the Phyllosoma complex is associated with the geographical distribution range, and the geographical range affects the climatic connectivity. We found no strong evidence of niche climatic divergence in members of this complex. We discuss the epidemiological implications of these results.
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Affiliation(s)
- D A Moo-Llanes
- Centro Regional de Investigación en Salud Pública (CRISP), Instituto Nacional de Salud Pública (INSP), 19 Poniente, Tapachula, Chiapas, 30700, Mexico
| | | | - J J Rodríguez-Rojas
- Universidad Autónoma de Nuevo León (UANL), Centro de Investigación y Desarrollo en Ciencias de la Salud (CIDICS), Unidad de Patógenos Emergentes y Vectores, Monterrey, Nuevo León, 64460, Mexico
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10
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Ingenloff K, Peterson AT. Incorporating time into the traditional correlational distributional modelling framework: A proof‐of‐concept using the Wood Thrush
Hylocichla mustelina. Methods Ecol Evol 2020. [DOI: 10.1111/2041-210x.13523] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kate Ingenloff
- University of Kansas Biodiversity Institute Lawrence KS USA
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11
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Biogeographical factors determining Triatoma recurva distribution in Chihuahua, México, 2014. BIOMÉDICA 2020; 40:516-527. [PMID: 33030830 PMCID: PMC7666858 DOI: 10.7705/biomedica.5076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Indexed: 11/21/2022]
Abstract
Introduction: Triatoma recurva is a Trypanosoma cruzi vector whose distribution and biological development are determined by factors that may influence the transmission of trypanosomiasis to humans.Objective: To identify the potential spatial distribution of Triatoma recurve, as well as social factors determining its presence.Materials and methods: We used the MaxEnt software to construct ecological niche models while bioclimatic variables (WorldClim) were derived from the monthly values of temperature and precipitation to generate biologically significant variables. The resulting cartography was interpreted as suitable areas for T. recurva presence.Results: Our results showed that the precipitation during the driest month (Bio 14), the maximum temperature during the warmest month (Bio 5), and the altitude (Alt) and mean temperature during the driest quarter (Bio 9) determined T. recurva distribution area at a higher percentage evidencing its strong relationship with domestic and surrounding structures.Conclusions. This methodology can be used in other geographical contexts to locate potential sampling sites where these triatomines occur.
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Eduardo AA, Santos LABO, Rebouças MC, Martinez PA. Patterns of vector species richness and species composition as drivers of Chagas disease occurrence in Brazil. INTERNATIONAL JOURNAL OF ENVIRONMENTAL HEALTH RESEARCH 2018; 28:590-598. [PMID: 30063379 DOI: 10.1080/09603123.2018.1497776] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2017] [Accepted: 07/02/2018] [Indexed: 06/08/2023]
Abstract
Chagas disease represents one of the major health issue in Latin America. Epidemiological control is focused on disease vectors, so studies on the ecology of triatomine vectors constitute a central strategy. Recently, research at large spatial scale has been produced, and authors commonly rely on the assumption that geographical regions presenting good environmental conditions for most vector species are also those with high risk of infection. In the present work, we provide an explicit evaluation for this assumption. Employing species distribution models and epidemiological data for Chagas disease in Brazilian territory, our results show that species richness is a poor predictor for the observed pattern of Chagas disease occurrence. Species composition proved to be a better predictor. We stress that research on macroecology of infectious diseases should go beyond the analysis of biodiversity patterns and consider human infections as a central part of the focal ecological systems.
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Affiliation(s)
- Anderson A Eduardo
- a Laboratory of Integrative Research on Biodiversity (PIBi-Lab), Centro de Ciências Biológicas e da Saúde, Departamento de Biologia , Universidade Federal de Sergipe (UFS) , Aracaju , SE , Brazil
| | - Lucas A B O Santos
- b Laboratory of Molecular Biology , Hospital Universitário da Universidade Federal de Sergipe (HU-UFS) , Aracaju , SE , Brazil
| | - Mônica C Rebouças
- a Laboratory of Integrative Research on Biodiversity (PIBi-Lab), Centro de Ciências Biológicas e da Saúde, Departamento de Biologia , Universidade Federal de Sergipe (UFS) , Aracaju , SE , Brazil
| | - Pablo A Martinez
- a Laboratory of Integrative Research on Biodiversity (PIBi-Lab), Centro de Ciências Biológicas e da Saúde, Departamento de Biologia , Universidade Federal de Sergipe (UFS) , Aracaju , SE , Brazil
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López MS, Müller GV, Sione WF. Analysis of the spatial distribution of scientific publications regarding vector-borne diseases related to climate variability in South America. Spat Spatiotemporal Epidemiol 2018; 26:35-93. [PMID: 30390933 DOI: 10.1016/j.sste.2018.04.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Revised: 01/11/2018] [Accepted: 04/25/2018] [Indexed: 12/13/2022]
Abstract
Most vector-borne diseases exhibit a distinct seasonal pattern, which clearly suggests that they are weather sensitive. Rainfall, temperature, and other climate variables affect in many ways both the vectors and the pathogens they transmit. Likewise, climate can be determinant in outbreaks incidence. A growing number of studies have provided evidence indicating the effects of climate variability on vector-borne diseases. However, oftentimes, the different diseases and regions are not uniformly represented, scarcity or lack of publications in some countries is common. The objectives of this work were to analyze the distribution and abundance of publications on vector-borne diseases associated with climate variability in South America, identify those works that conducted a geographic analysis and detect the countries where outbreaks occurred and the climate variables with which they were associated. A systematic review of the literature published on vector-borne diseases linked to climate variability in South America was conducted, identifying, evaluating and summarizing scientific papers. The distribution of the study areas and disease type in the publications were represented on maps. Dengue and leishmaniasis were the most studied and widely represented diseases in South America. The country with the largest number of published papers and presence of all disease types was Brazil. Outbreaks of disease were related to different climate variables. Most diseases from the publications under study occurred in equatorial and tropical climates. The disease represented by the largest number of different types of climates was dengue. The technique used in this work allowed us to determine the status of knowledge of the main diseases associated with climate variability in South America. This methodology could be improved in the future by incorporating other bibliographic sources as well as other diseases related to climate variability.
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Affiliation(s)
- María S López
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Av. Rivadavia 1917, C1033AAJ, Ciudad Autónoma de Buenos Aires, Argentina; Facultad de Ingeniería y Ciencias Hídricas, Centro de Estudios de Variabilidad y Cambio Climático (CEVARCAM), Universidad Nacional del Litoral (UNL), Ruta Nacional N° 168-Km 472.4, CC 217, Ciudad Universitaria, CP 3000 Santa Fe, Argentina.
| | - Gabriela V Müller
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Av. Rivadavia 1917, C1033AAJ, Ciudad Autónoma de Buenos Aires, Argentina; Facultad de Ingeniería y Ciencias Hídricas, Centro de Estudios de Variabilidad y Cambio Climático (CEVARCAM), Universidad Nacional del Litoral (UNL), Ruta Nacional N° 168-Km 472.4, CC 217, Ciudad Universitaria, CP 3000 Santa Fe, Argentina
| | - Walter F Sione
- Centro Regional de Geomática (CEREGeo), Universidad Autónoma de Entre Ríos (UADER), Km 10,5, RP11, CP3100, Oro Verde, Entre Ríos, Argentina
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Triatoma dimidiata in Colombia. Distribution, ecology and its epidemiological importance. BIOMEDICA 2017; 37:274-285. [DOI: 10.7705/biomedica.v37i2.2893] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2015] [Indexed: 11/21/2022]
Abstract
Triatoma dimidiata es un importante vector de la enfermedad de Chagas en Centro América y países del norte de Suramérica. En Colombia tiene una amplia dispersión con reportes de presencia en 14 departamentos de las regiones Andina, Caribe, Llanos Orientales y Alto Magdalena, áreas en las cuales ocupa diferentes ecotopos naturales y artificiales. La especie está clasificada como secundaria para la transmisión de Trypanosoma cruzi sin embargo su presencia en el ambiente silvestre, peridoméstico e intradoméstico en la región Andina, y su capacidad de movilizarse entre estos escenarios lo facultan para escapar del control basado en aspersión con piretroides resaltando su importancia en el mantenimiento de la transmisión del parásito a través de la potencial re-infestación de las viviendas. La comprensión de las conexiones establecidas por T. dimidiata, entre los escenarios, y el trabajo con la comunidad en actividades de empoderamiento permitirá contribuir en el desarrollo de sistemas de control efectivos y perdurables en el tiempo. El propósito de esta revisión es describir la distribución, factores de riesgo, ecología, características entomológicas y escenarios de las poblaciones de T. dimidiata en Colombia, así como proponer alternativas de intervención acorde a las exigencias particulares que esta especie demanda.
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