Article
Spatial distribution of triatomines in domiciles of an urban area of the Brazilian Southeast Region.
Registro en:
DIAS, João Victor Leite et al. Spatial distribution of triatomines in domiciles of an urban area of the Brazilian Southeast Region. Mem. Inst. Oswaldo Cruz, v. 111, n. 1, p. 43-50,2016
0074-0276
10.1590/0074-02760150352
Autor
Dias, João Victor Leite
Queiroz, Dimas Ramon Mota
Martins, Helen Rodrigues
Gorla, David Eladio
Pires, Herton Helder Rocha
Diotaiuti, Liléia Gonçalves
Resumen
Reports of triatomine infestation in urban areas have increased. We analysed the spatial distribution of infestation by triatomines in the urban area of Diamantina, in the state of Minas Gerais, Brazil. Triatomines were obtained by community-based entomological surveillance. Spatial patterns of infestation were analysed by Ripley’s K function and Kernel density estimator. Normalised difference vegetation index (NDVI) and land cover derived from satellite imagery were compared between infested and uninfested areas. A total of 140 adults of four species were captured (100 Triatoma vitticeps, 25Panstrongylus geniculatus, 8 Panstrongylus megistus, and 7 Triatoma arthurneivai specimens). In total, 87.9% were captured within domiciles. Infection by trypanosomes was observed in 19.6% of 107 examined insects. The spatial distributions ofT. vitticeps, P. geniculatus, T. arthurneivai, and trypanosome-positive triatomines were clustered, occurring mainly in peripheral areas. NDVI values were statistically higher in areas infested by T. vitticeps and P. geniculatus. Buildings infested by these species were located closer to open fields, whereas infestations of P. megistus andT. arthurneivai were closer to bare soil. Human occupation and modification of natural areas may be involved in triatomine invasion, exposing the population to these vectors