Helminthes and protozoan of farmed pirarucu (Arapaima gigas) in eastern Amazon and host-parasite relationship.

The article discusses the results of a study which investigated the pirarucu parasitofauna in the giant Amazon basin. It describes the pirarucu as the largest scaled freshwater fish species in the world which can reach three meters in length. It notes that pirarucu A. gigas has a high parasite diversity in the natural environment, including Myxozoa, Monogenoidea, and Nematoda. The importance of acquiring knowledge of the ecological relationships among parasites is also emphasized.