Development of Colombian isolates of Leishmania (Viannia) panamensis, Le. (V.) guyanensis and Le. (V.) braziliensis in the sandfly Lutzomyia intermedia (Lutz & Neiva, 1912) under experimental conditions

Abstract

The development of Colombian Leishmania species of the subgenus Viannia in Lutzomyia intermedia was similar to that observed with Brazilian Le. (V.) braziliensis: colonization of the pylorus by paramastigotes; promastigotes in the midgut and massive infection of stomodeal valve. Difference was observed in the number of paramastigotes colonizing the pylorus, which was smaller in Colombian Leishmania species than Brazilian Le. braziliensis.

Single and concomitant experimental infectionsby Endotrypanum spp. and Leishmania (Viannia) guyanensis (Kinetoplastida: Trypanosomatidae) in the Neotropical sand fly Lutzomyia longipalpis (Diptera: Psychodidae)

“…(Rangel et al 1992(Rangel et al , 1993. In the present work, not only were flagellates found in a large percentage of susceptible females, but they were also seen to be abundantly infecting the stomodeal valve.…”

Nyssomyia intermedia (Lutz & Neiva, 1912) and Nyssomyia neivai (Pinto, 1926) (Diptera: Psychodidae: Phlebotominae) geographical distribution and epidemiological importance

“…Experiments have shown that these species may be easily infected with several strains and species of Leishmania (Chagas 1940, Coelho et al 1967, Rangel et al 1992, 1993, Silva & Gomes 2001, which shows that these species are susceptible to infection by Leishmania. In the light of these data, there seems to be little doubt as to the vectorial capacity of N. intermedia and N. neivai.…”

Host-biting rate and susceptibility of some suspected vectors to Leishmania braziliensis

“…The median value of 6.2% found for wild females of Ny. intermedia was much lower than the infection rates observed for females of the laboratory colony (39 th generation) whose forebears came from Rio de Janeiro state [49,50]. They observed an infection rate above 30% for females fed on an infected hamster or artificially on chicken-skin membrane.…”