Tuberculosis
Lymphosarcoma
Tapeworm Cysts
Lipidosis
Leiomyosarcoma
Nematodal Granulomas
Adult Intestinal
Parasites
Swim Bladder Bloat

Name of Disease	Probable Cause	Appearance	Species of Fish Affected	More Info
Tuberculosis	mycobacterium	multiple white nodule on organs or skin; tubercules can be found in any body tissue; skin may show mulitple ulcers	most freshwater fish; most common in hatchery reared fish
Lymphosarcoma	see	diseases of	skin , muscle	and fins
Tapeworm cysts	see	diseases of	skin, muscle	and fins
Lipidosis	poor nutrition, ongoing disease of other organs, high fat intake	pale yellow or light brown livers sometimes torn or fractures with associated bleeding	rainbow trout; reared in captivity or in wild; other fish can be affected
Leiomyosarcoma	unknown	pale shiny firm round to oval masses attached to or involving the testicles or ovaries	yellow perch; others
Nematodal granulomas	larval stage of roundworms	firm white nodules found in any internal organ	foraging or prey fish
Adult intestinal parasites	parasites in end stage of lifecycle	worms present in intestines	older fish
Swim bladder bloat	sudden change in depth	swollen abdomens; float on back	walleye; any fish brought quickly to surface from deep water