Le Pont, F2026-03-222026-03-221983https://andeanlibrary.org/handle/123456789/16858Summary. The epidemiological study of kala-azar in the "Yungas" focus shows that L. longipalpis, a predominant phlebotomine sandfly in peridomestic areas (96% of catches) is the main vector, Dissections of L. longipalpis performed at the end of the rainy season allowed to separate 5 stocks which proved close to L. donovani complex, considering their isozymic profile. The infection rate of L. longipalpis populations found around isolated houses, in rural areas, varies from 1 to 4.2%. Transmission is likely to be more active in the warmer bottoms of valleys.esLEISHMANIASISBOLIVIALUTZOMYIA LONGIPALPISYUNGAS, BOLIVIAArticle