Tavares-Dias et al. (2001) described a Trichodina sp. Prevalence at fee fishings from Southeast Brazil. The authors also observed that Leporinus macrocephalus, P. mesopotamicus and Cyprinus carpio were the most susceptible species to the protozoa infestation, if compared to tambacu (P. mesopotamicus × Colossoma macropomum),Brycon cephalus, Tilapia rendalli and O. niloticus.
In Brazil, recent studies described the occurrence of fish infections by exotic trichodinid species . Thus, it is important to implement clear and rigid sanitary protocols to be followed by farmers importing fish that will be used to populate national aquaculture.