VIGILÂNCIA ENTOMOLÓGICA DE TRIATOMINAE (HEMIPTERA: REDUVIIDAE) DE 2016 A 2025 EM MATO GROSSO DO SUL, BRASIL.

Abstract

Chagas disease, caused by the protozoan Trypanosoma cruzi, is a neglected disease whose main route of transmission involves contact with feces contaminated by hematophagous triatomines. Transmission dynamics involve different cycles: sylvatic, peridomestic, and domestic. Changes in vegetation cover, housing construction, and the presence of domestic animals have favored the occurrence of synanthropic habits in these vectors, especially in rural areas. In this context, entomological surveillance plays a fundamental role in controlling transmission, carried out through active and passive strategies. Correct identification and disposal of these vectors enables the implementation of control measures, contributing to the prevention and control of the disease. The present study aims to identify the evolutionary phase and species of triatomines collected in the rural environment of Campo Grande, as well as to carry out direct parasitological research of trypanosomatid forms by optical microscopy (OM), identify the presence of T. cruzi DNA by polymerase chain reaction (PCR) technique, review secondary data from the state database of the Vector Control Coordination (CCV) of triatomines captured and examined by MO, both by active and passive surveillance, between 2016 and 2024 and calculate entomological indicators to support the preparation of an epidemiological bulletin. A total of 261 triatomines were collected at 6 of the 27 sampling points, between 2024 and 2025, comprising 21.45% males, 7.28% females, and 71.26% nymphs. The only species collected was Triatoma sordida No trypanosomatid forms were detected by OM, nor was T. cruzi DNA detected by PCR. Regarding secondary data from the CCV, 3.483 triatomines were collected in Mato Grosso do Sul between 2016 and 2024, 2.657 through active surveillance and 826 through passive surveillance. A total of 1.510 adults and 1.662 nymphs were examined, and only one triatomine tested positive. The species identified throughout the historical series were: Triatoma costalimai, Triatoma sordida, Triatoma matogrossensis, Rhodnius neglectus, Rhodnius pictipes, Panstrongylus diasi and Panstrongylus geniculatus. The data refer to entomological surveillance activities carried out by 38 of the state's 79 municipalities.