INVESTIGADORES
STEIN Marina
congresos y reuniones científicas
Título:
Phlebotominae associated with leishmaniasis foci in argentina
Autor/es:
SALOMON, D.; QUINTANA, M.G.; ORELLANO, P.; STEIN, M.; ROSA, J.; ACARDI, S.; LAMFRI, M.; SCAVUZZO, M.
Lugar:
Tunez
Reunión:
Simposio; Fifth international symposium on Phlebotomine sandflies; 2005
Institución organizadora:
Institut Pasteur de Tunis
Resumen:
Tegumentary leishmaniasis (TL) transmission in Argentina is endemic above 28°
latitude south. The área (~450000km2) involves three ecological regions: western
(Yungas), eastern (Paranaense) subtropical forests, and a xeric savannah
between them (Chaco). Standardized phlebotomine captures with CDC light traps
were performed from 1990 to 2004 in leishmaniasis foci thorough 9 endemic
provinces. The results with the aid of satellite imagery are being used to support
outbreak origin hypotheses, and to build maps of risk:
Region Sites Spp. N Prevalent species
Yungas 18 4 51419 L. neivai 98.0%; L. miqonei
1.2%
Paranaense 15 13 18581 L. neivai 86.8%; L.
whitmani 8.7%
Chaco a 13 5 267 L migonei 69.0%; L.
cortelezzii 15.7%;
Chaco b 4 5 6792 L. nevai 96.3%; L. migonei
3.1%
Yungas is a "Hot spots" within gallery forest and the peridomestic captures were
performed near woods and animal dwellings. Paranaense: the peridomestic
captures were done close to great patches of woods with high species diversity.
Chaco a is a xeric environment and the results were similar to captures reported
up to 1950. Chaco b is a main rivers and the results were similar to those of the
Yungas region. The distribution of species with vector capacity suggests the
probability of peridomestic transmission overlapped with a sylvatic cycle of lower
intensity. The pert-urban foci in most of the cases are still related to phiebotominae
source of populations from less disturbed environments. The factors that
contributed to each LT outbreak were analyzed for the three regions.