title: Spatial distribution of triatomines in domiciles of an urban area of the Brazilian Southeast Region.
abstract: 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, 25 Panstrongylus 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 and T. 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.
authors.affiliation: Laboratório de Triatomíneos e Epidemiologia da Doença de Chagas, Centro de Pesquisas René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, MG, Brasil.
authors.forename: João Victor Leite
authors.initials: JV
authors.lastname: Dias
authors.affiliation: Laboratório de Doenças Parasitárias, Departamento de Farmácia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina, MG, Brasil.
authors.forename: Dimas Ramon Mota
authors.initials: DR
authors.lastname: Queiroz
authors.affiliation: Laboratório de Doenças Parasitárias, Departamento de Farmácia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina, MG, Brasil.
authors.forename: Helen Rodrigues
authors.initials: HR
authors.lastname: Martins
authors.affiliation: Instituto Multidisciplinario de Biología Vegetal, Consejo Nacional de Investigaciones Científicas y Técnicas, Córdoba, Argentina.
authors.forename: David Eladio
authors.initials: DE
authors.lastname: Gorla
authors.affiliation: Laboratório de Doenças Parasitárias, Departamento de Farmácia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina, MG, Brasil.
authors.forename: Herton Helder Rocha
authors.initials: HH
authors.lastname: Pires
authors.affiliation: Laboratório de Triatomíneos e Epidemiologia da Doença de Chagas, Centro de Pesquisas René Rachou, Fundação Oswaldo Cruz, Belo Horizonte, MG, Brasil.
authors.forename: Liléia
authors.initials: L
authors.lastname: Diotaiuti
mesh_terms: D000818:Animals; D001938:Brazil; D014355:Chagas Disease / Q000635:transmission; D006798:Housing; D006801:Humans; D007303:Insect Vectors / Q000145:classification*; D011156:Population Density; D062206:Spatial Analysis; D014225:Triatominae / Q000145:classification*; D014505:Urban Population
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