Prevalence, intensity, and phylogenetic analysis of Henneguya piaractus and Myxobolus cf. colossomatis from farmed Piaractus mesopotamicus in Brazil.

Henneguya piaractus and Myxobolus colossomatis (Myxosporea: Myxobolidae) are commonly found in the characid Piaractus mesopotamicus, an important fish farm species in Brazil. This paper describes the prevalence, mean intensity, molecular phylogeny, ultrastructure, and histology of H. piaractus and M.