2026-05-11T15:08:15Zhttps://repisalud.isciii.es/rest/oai/request

oai:repisalud.isciii.es:20.500.12105/265982025-12-18T13:01:38Zcom_20.500.12105_2052com_20.500.12105_2051col_20.500.12105_19609

00925njm 22002777a 4500 dc Gómez-Bravo, Andrea author Cirignoli, Sebastián author Wehrendt, Diana author Schijman, Alejandro author León, Cielo M author Flores-Chavez, Maria author Nieto Martinez, Francisco Javier author Kieran, Troy J author Abril, Marcelo author Guhl, Felipe author 2024-06-25 Trypanosoma cruzi, the causative agent of Chagas disease (American trypanosomiasis), is a highly complex zoonosis that is present throughout South America, Central America, and Mexico. The transmission of this disease is influenced by various factors, including human activities like deforestation and land use changes, which may have altered the natural transmission cycles and their connection to the environment. In this study conducted in the Argentine Chaco region, we examined the transmission dynamics of T. cruzi by collecting blood samples from wild and domestic animals, as well as triatomine bugs from human dwellings, across five sites of varying anthropic intervention. Samples were analyzed for T. cruzi infection via qPCR, and we additionally examined triatomines for bloodmeal analysis via NGS amplicon sequencing. Our analysis revealed a 15.3% infection rate among 20 wild species (n = 123) and no T. cruzi presence in 9 species of domestic animals (n = 1359) or collected triatomines via qPCR. Additionally, we found chicken (34.28%), human (21.59%), and goat (19.36%) as the predominant bloodmeal sources across all sites. These findings suggest that anthropic intervention and other variables analyzed may have directly impacted the spillover dynamics of T. cruzi's sylvatic cycle and potentially reduced its prevalence in human habitats. Gómez-Bravo A, Cirignoli S, Wehrendt D, Schijman A, León CM, Flores-Chaves M, Nieto J, Kieran TJ, Abril M, Guhl F. Zoonotic Cycle of American Trypanosomiasis in an Endemic Region of the Argentine Chaco, Factors That Influenced a Paradigm Shift. Insects. 2024 Jun 25;15(7):471. 10.3390/insects15070471 2075-4450 Insects 39057204 https://hdl.handle.net/20.500.12105/26598 Chagas disease Trypanosoma cruzi Human intervention Spillover Triatomines Vector control Zoonosis Zoonotic Cycle of American Trypanosomiasis in an Endemic Region of the Argentine Chaco, Factors That Influenced a Paradigm Shift