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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 101, No. 3, 2006, pp. 295-299
Bioline Code: oc06053
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 101, No. 3, 2006, pp. 295-299

 en Phlebotominae spatial distribution asssociated with a focus of tegumentary leishmaniasis in Las Lomitas, Formosa, Argentina, 2002
Oscar Daniel Salomón; Pablo Wenceslao Orellano; Mario Lamfri; Marcelo Scavuzzo; Lucía Dri; María Isabel Farace & Darío Ozuna Quintana

Abstract

Las Lomitas, Formosa, Argentina, reported 96 cases of tegumentary leishmaniasis during 2002. The urban transmission was suggested although previous outbreaks were related with floods of the Bermejo river (BR) 50 km from the village. Phlebotomine collections were performed during March 2002 to define the spatial distribution of risk, together with satellite imaginery. The phlebotomine/trap obtained was 1679.5 in the southern BR shore, 1.1 in the periruban-rural environment and 2.3 in the northern Pilcomayo river marshes. Lutzomyia neivai check for this species in other resources was the prevalent species (91.1%) among the 2393 phlebotomine captured, and it was only found in the BR traps.

The other species were L. migonei (7.9%), L. cortelezzii (0.9%), and Brumptomyia guimaraesi check for this species in other resources (0.1%). The satellite images analysis indicates that the fishing spots at the BR were significantly overflowed during the transmission peak, consistent with fishermen recollections. This spatial restricted flood might concentrate vectors, reservoirs, and humans in high places. Therefore, both the spatial distribution of vectors and the sensor remoting data suggests that in Las Lomitas area the higher transmission risk it is still related with the gallery forest of the BR, despite of the urban residence of the cases. The surveillance and control implications of these results are discussed

Keywords
leishmaniasis - Lutzomyia neivai - remote sensing - ecoepidemiology

 
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