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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 104, No. 1, 2009, pp. 56-61
Bioline Code: oc09009
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 104, No. 1, 2009, pp. 56-61

 en Phlebotominae distribution in Janaúba, an area of transmission for visceral leishmaniasis in Brazil
Michalsky, Érika Monteiro; França-Silva, João Carlos; Barata, Ricardo Andrade; Silva, Fabiana de Oliveira Lara e; Loureiro, Angélica Marciano Fernandes; Fortes-Dias, Consuelo Latorre & Dias, Edelberto Santos

Abstract

In Brazil, visceral leishmaniasis (VL) is caused by Leishmania chagasi check for this species in other resources 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.

Keywords
Lutzomyia longipalpis - visceral leishmaniasis - eco-epidemiology - Janaúba

 
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