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
| Autor: | Daniel Guzmán-Gómez, Eric Dumonteil, Etienne Waleckx, Carlos Welsh-Rodriguez, Jesús Torres-Montero, Gerardo Salas-González, Aracely López-Monteon, Angel Ramos-Ligonio |
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| Rok vydání: | 2021 |
| Předmět: |
Chagas disease
Male Rural Population Veterinary medicine Trypanosoma cruzi 030231 tropical medicine medicine.disease_cause law.invention 03 medical and health sciences 0302 clinical medicine law Risk Factors Surveys and Questionnaires parasitic diseases Infestation medicine Animals Humans Chagas Disease Triatoma dimidiata Triatoma Mexico Weather Family Characteristics biology Public Health Environmental and Occupational Health Blood meal biology.organism_classification medicine.disease Insect Vectors Colonisation Infectious Diseases Transmission (mechanics) Vector (epidemiology) Housing Parasitology Female Seasons Rural area Water Microbiology |
| Zdroj: | Tropical medicineinternational health : TMIHReferences. 26(8) |
| ISSN: | 1365-3156 |
| Popis: | 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 |
| Databáze: | OpenAIRE |
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