Natural infections with Leishmania promastigotes in Lutzomyia ayacuchensis (Diptera: Psychodidae) in an Andean focus of Ecuador.

In the Andean town of Paute, Ecuador, 2 of 97 (2%) Lutzomyia ayacuchensis Caceres and Bianchi were found to be naturally infected with Leishmania promastigotes. The parasites were confined to the midgut of the sand fly, indicating they did not belong to the subgenus Leishmania (Viannia ).