Category: Aquaculture | Fish Disease and Health

Fish pox: a skin disease of fishes

Fish pox, or carp pox, is one of the oldest known diseases of fish, recorded as early as 1563. Fish pox is a chronic skin disease that occurs among several species of propagated cyprinids. It is also called carp pox, epithelioma papillosum, and papillosum cyprini.

Etiology: The etiological agent, of this disease is Herpesvirus cyprini which was first reported by B. Hofer in 1904.


Icosahedral DNA virus with …read more

Category: Aquaculture | Fish Disease and Health

VHS: a vesceroptropic disease of young fishes

An acute to chronic vesceroptropic disease of young (fingerling to yearling) rainbow trout at 100C or lower. Also in adult trouts and salmonids, but not usual.

Etiology: VHSV (Viral Haemorrhagic Septicemia Virus)

Viral characteristics:

Bullet-shaped rhabdovirus, enveloped. Length- 180 nm, width- 70-85 nm, apical end rounded, other end flat. ss RNA, replication in cytoplasm. Sensitive to lipid solvents, detergents and proteolytic enzymes.


Trouts farms in European countries: Denmark, …read more

Category: Aquaculture | Fish Disease and Health

Vibriosis: an enzootic disease of fishes

Definition: Vibriosis is an enzootic disease of fish, recorded from all over the world. It is almost exclusively caused by halophilic vibrios of the species Vibrio anguillarum and rarely by Vibrio parahaemolyticus. It occurs among various fish species, predominantly in marine and brackish waters, and occasionally in fresh water. First described as red pest disease of eels. Now described as hemorrhagic lesions on the body surface of many marine fishes.

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