Ecology of phlebotomines (Diptera, Psychodidae) in rural foci of leishmaniasis in tropical Brazil

Revista da Sociedade Brasileira de Medicina Tropical

Clara Maria Lima Silva²  Leandro Santos Moraes¹  Gustavo Almeida Brito¹  Ciro Libio Caldas Dos Santos¹  José Manuel Macário Rebêlo¹ 

[1] ,Universidade Federal do Maranhão Programa de Pós-Graduação em Biodiversidade e Conservação São Luis MA

关键词: Sandflies;    Vector insects;    Leishmaniasis;    Peridomicile;    Amazonia;    Northeast;    Flebotomíneos;    Insetos vetores;    Leishmanioses;    Peridomicílio;    Amazônia;    Nordeste;   

DOI  :  10.1590/S0037-86822012000600008

来源: SciELO

【 摘 要 】

INTRODUCTION: This work aimed to study the community structure of sandflies, with regard to the richness, constancy, abundance, and monthly frequency of the species with a focus on the transmission of leishmaniasis. METHODS: The study was conducted in the rural villages of Bom Jardim and Santa Maria, situated on the edge of a tropical rain forest in the municipality of São Jose de Ribamar, Maranhão, Brazil. The phlebotomines were captured in the intradomiciles and peridomiciles of each village, with Centers for Disease Control (CDC) light traps set in 10 homes in each village, for 1 year, once a month, from 18h to 6h. RESULTS: We collected 1,378 individuals of 16 sandfly species. The capture success rate was higher in Bom Jardim (0.61 specimens/hour/trap) than that of Santa Maria (0.35/specimens/hour/trap). The sandflies were more abundant in the peridomiciles (86.1%) and in the rainy season (77%). Five species were considered constants (occurring in more than 50% of samples), 5 accessory (25%-50%), and 6 accidental (<25%). The most abundant species were Lutzomyia longipalpis (59.7%) and L whitmani (28%). The permutation analysis showed differences between the species composition of the villages and no separation between the intradomicile and peridomicile of each village. The species that most contributed to the dissimilarity between the light traps of the 2 villages were L. longipalpis, L. whitmani, and L. evandroi, contributing to 80.8% of the variation among groups. CONCLUSIONS: The high level of richness and abundance of species and the presence of competent vectors throughout the year and around houses justify the occurrence of leishmaniasis cases reported in the area.

【 授权许可】

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