FIRST RECORD OF INFECTION BY Batrachochytrium dendrobatidis AND BY THE NEMATODE OF THE GENUS Capillaria AND THE ABSENCE OF INFECTION BY Ribeiroia ondatrae IN Ambystoma ordinarium

Abstract

Chytridiomycosis caused by Batrachochytrium dendrobatidis (Bd) and trematodiasis originate from Ribeiroia ondatrae are factors causing the decline of amphibians. To assess the coexistence of Bd and this trematode in México, we conducted two visits to 20 streams in the Trans-Mexican Volcanic Belt in Michoacán, obtaining skin swabs from 43 individuals of Ambystoma ordinarium for molecular detection of Bd. Additionally, we collected 100 gastropods of the genus Lymnaea to evaluate the presence of R. ondatrae in the caudate's habitats. The results of Bd detection indicated that 37 salamanders from nine sites showed infection by Bd in levels ranging from 21 to 4,318 genomic equivalent zoospores. However, the analysis of tissue samples from the gastropods did not reveal any infection by R. ondatrae. This study presents the first record of infection by nematodes of genus Capillaria in this salamander