Abstract

TINEO V, Edwin et al. Distribución  geográfica y comportamiento estacional de la picadura del Anopheles (Nyssorhynchus) darlingi Root 1926 en  localidades de la frontera Perú-Bolivia, Madre de Dios, Perú. Rev. perú. med. exp. salud publica [online]. 2003, vol.20, n.2, pp.78-83. ISSN 1726-4634.

Objectives: To determine the geographical distribution and the seasonal behavior of Anopheles darlingi in San Pedro, La Novia, Shiringayoc and Mavila sites in Madre de Dios Department. Materials and methods: Between June 2001 and April 2002, the inspection of breeding places, the collection of acuatic stages of Anopheles darlingi using the ladle method and the collection of adult mosquitoes with indoor and outdoor human baits (intra and peridomiciliary), Shannon trap and animal shelter (extradomiciliary), were performed monthly in the four sites. A map of the geographical location of the vectors calculating the indicators: positive breeding place, larva density by ladle, human night bite index (HNBI), human hour bite index (HHBI) and parity rate, was elaborated. Results: The presence of Anopheles darlingi in San Pedro, La Novia and Mavila sites was demonstrated. Inmature stages represented less than 12% of the larvae of Anopheles found in permanent breeding places. HHBI for the three sites was higher in the rainy season (December-April), The bite of Anoph-eles darlingi showed an unimodal behavior, with the highest HHBI between 20:00 and 23:00 hours in San Pedro and La Novia; and between 20:00 and 22:00 hours in Mavila. Conclusions: The highest population density for Anopheles darlingi is shown during the rainy season, this vector presented an unimodal bite behavior with greatest hematophagical activity between 22:00 and 23:00 hours.

Keywords : Malaria; Anopheles darlingi; Vector; Entomologic indicators; Distribution; Seasonal behavior; Peru.

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