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 (original) (raw)

Tropical Medicine & International Health, 2021

Abstract

ObjectiveTo 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.MethodsA 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.ResultsSeasonal 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 ...

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