Phlebotominae distribution in Janaúba, an area of transmission for visceral leishmaniasis in Brazil

Memórias do Instituto Oswaldo Cruz

Érika Monteiro Michalsky²  João Carlos França-silva¹  Ricardo Andrade Barata²  Fabiana De Oliveira Lara E Silva²  Angélica Marciano Fernandes Loureiro¹  Consuelo Latorre Fortes-dias¹  Edelberto Santos Dias² 

[1] ,FIOCRUZ Instituto René Rachou Belo Horizonte MG ,Brasil

关键词: Lutzomyia longipalpis;    visceral leishmaniasis;    eco-epidemiology;    Janaúba;   

DOI  :  10.1590/S0074-02762009000100009

来源: SciELO

【 摘 要 】

In Brazil, visceral leishmaniasis (VL) is caused by Leishmania chagasi parasites that are transmitted to man through the bites of infected females of Lutzomyia longipalpis sand flies. In order to evaluate transmission risk and to clarify the epidemiology of this tropical disease, studies focused on the vector and favorable environmental conditions are of fundamental importance. In this work, we surveyed the phlebotomine sand fly fauna in Janaúba, a Brazilian municipality that is endemic for VL. During a two-year period, entomological captures were performed monthly in 15 districts with high, moderate and low profiles of VL transmission. A total of 14,591 phlebotomine sand flies were captured (92% L. longipalpis), with a predominance of males. Most specimens were captured in the peri-domicile setting, although the number of specimens captured in the intra-domicile setting emphasises the anthropophilic behaviour of this insect. The population density of L. longipalpis was modulated by climate variations, particularly with clear increases immediately after the rainy season. However, the pattern of distribution did not coincide with the occurrence of human or canine cases of VL. This suggests that the eco-epidemiology of VL is particular to each area of transmission and must be taken into account during the design of public health control actions.

【 授权许可】

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