Circulation of Trypanosoma cruzi in triatomines and Didelphis sp. in urban areas: Transmission risk assessment in the Metropolitan Region.

The presence of Trypanosoma cruzi vectors in urban areas has been frequent, with colonization of homes and associated with reservoir animals that increase risk to humans, with simultaneous circulation of vectors and T. cruzi. The study aimed to describe the circulation of triatomines and T. cruzi in the Metropolitan Region of São Paulo, as well as evaluate risk situations. For analysis purposes, the triatomine notification information from January 2016 to July 2023 was used. While for Didelphis sp. collection with the aid of traps, notification information used was from 2019 to 2023. Information about triatomines came from spontaneous demand by the population and notification services were carried out by state field teams following defined protocols. 202 notifications were received with the capture of 448 triatomines. The positivity for T. cruzi observed was 60.5%. Regarding Didelphis sp., 416 animals were collected, 5.3% of which were positive for T. cruzi. There was overlapping areas of presence of infected triatomines and Didelphis sp., whose Discrete Typing Unit (DTU) was T. cruzi I. This work indicates the presence of infected vectors in urban areas, and the presence of a wild cycle of T. cruzi in didelphiids, reaffirming the need for and importance of vector surveillance work, through actions that can prevent the transmission of Chagas disease.

Colonization of Panstrongylus megistus (Hemiptera:Reduvidae:Triatominae) in an urban area and its association with Didelphis marsupialis in the metropolitan region of São Paulo.

INTRODUCTION: This communication reports the colonization of Panstrongylus megistus in an urban area of the municipality of Taboão da Serra in the metropolitan region of São Paulo. METHODS: After receiving a notification from the population, entomological research comprising active search, collection, identification, and examination of triatomines was conducted. Wild animals were captured and examined. RESULTS: A colony of triatomines was found to be associated with dogs in the backyard of the property. CONCLUSIONS: The colonization of P. megistus shows the potential for their occupation of artificial ecotopes, which may pose a risk to the human population.

Colonization by Panstrongylus megistus (Hemiptera, Reduviidae, Triatominae) in an urban park in the city of São Paulo

Abstract INTRODUCTION: This communication reports on the occurrence of colonization by Panstrongylus megistus in an urban park in the municipality of São Paulo, Brazil. METHODS: Entomological research includes active search for vectors based on notifications by the population and identification and examination of insects. RESULTS: A colony of triatomines was found to be associated with enclosed birds. CONCLUSIONS: The occurrence of P. megistus has already been reported in the city of São Paulo; however, reports of colonization by this species provide evidence of its potential for the occupation of artificial ecotopes, which may pose a risk to the human population.

Colonization of Panstrongylus megistus (Hemiptera: Reduvidae:Triatominae) in an urban area and its association with Didelphis marsupialis in the metropolitan region of São Paulo

Abstract INTRODUCTION: This communication reports the colonization of Panstrongylus megistus in an urban area of the municipality of Taboão da Serra in the metropolitan region of São Paulo. METHODS: After receiving a notification from the population, entomological research comprising active search, collection, identification, and examination of triatomines was conducted. Wild animals were captured and examined. RESULTS: A colony of triatomines was found to be associated with dogs in the backyard of the property. CONCLUSIONS: The colonization of P. megistus shows the potential for their occupation of artificial ecotopes, which may pose a risk to the human population.

Colonization by Panstrongylus megistus (Hemiptera, Reduviidae, Triatominae) in an urban park in the city of São Paulo.

INTRODUCTION: This communication reports on the occurrence of colonization by Panstrongylus megistus in an urban park in the municipality of São Paulo, Brazil. METHODS: Entomological research includes active search for vectors based on notifications by the population and identification and examination of insects. RESULTS: A colony of triatomines was found to be associated with enclosed birds. CONCLUSIONS: The occurrence of P. megistus has already been reported in the city of São Paulo; however, reports of colonization by this species provide evidence of its potential for the occupation of artificial ecotopes, which may pose a risk to the human population.