Agent
Edwardsallia ictaluri
Ichthyobodo spp.
Ichthyophthirius multifiliis
Mycobacterium spp.
Myxidium streisingeri
Picornavirus (RNA virus)
Piscinoodinium spp.
Pleistophora hyphessobryconis
Pseudocapillaria tomentosa
Pseudoloma neurophila
Tetrahymena spp.