VPP 322: Aquatic Animal Diseases, Health Care and Management (1+1)

FUNGAL DISEASES

Epizootic ulcerative disease in fish	Saprolegnia infection in a fish egg	Brachiyomycosis in gills of fish

Source: unmultimedia.org, shutterbug.ucsc.edu

Fungal disease	Causative agent	Symptoms
Saprolegniasis	Saprolegnia sp.	Appearance of cotton wool like tufts on the skin and gills of host fish or eggs which spreads over the entire surface. Saprelogniasis is mainly a secondary infection seen after damage to the fish integument caused by parasites, viruses, bacterial infection and other skin damage and this infection is common in eggs
Branchiomycosis	Branchiomyces sanguinis  B. demigrans	Causes acute, often high, mortality in several freshwater fishes. Gills may be mottled in appearance because of areas of thrombosis and ischemia, which cause alternating area of light and dark discolouration.
Epizootic ulcerative syndrome (EUS)	Aphanomyces invadans	Severe liquefactive necrosis of muscle tissue as it invades the body; in some cases the hyphae extend in to the visceral organs. Mass mortality associated with distinct dermal lesions including ulcers. Red-spots, blackish burn-like marks, or deeper ulcers with red centres and white rims.