Ichthyophonus, a systemic mesomycetozoan pathogen of fish (revised)

Ichthyophonus has low host specificity, with records from over 80 species of fish. Mainly marine fish are infected, but freshwater species are also affected. It occurs commonly in haddock, Melanogrammus aegelfinus (L.); plaice, Pleuronectes platessa L.; and Atlantic herring, Clupea harengus L. The apparent rarity of Ichthyophonus in elasmobranchs may be related to limited surveillance in this group. Infection with a morphologically  similar  agent,  now  referred  to  as  Amphibiocystidium,  has  been  reported from amphibians.

Revision and update of the original Identification Leaflet 3, by A. H. McVicar.