They show that Kudoa species are distinct from other myxozoans analyzed (Myxidium sp., Myxobolus sp., and Henneguya zschokkei).

[1] Kudoa thyrsites is an interesting member of this group in that apparently has very broad host specificity, infecting many fish species around the world (Table 1).

Members of the genus Kudoa primarily infect muscle tissue of marine fishes, where they form nodules or pseudocysts containing a great number of individual spores.

The intensity of K. thyrsites infection is positively correlated with the severity of flesh softening in Atlantic salmon fillets.

Experiments have shown direct transmission of the marine myxosporean Myxidium leei in sea bream.