Outbreak of spring viraemia of carp – Fishupdate.com

Outbreak of spring viraemia of carp Fish Farming Today Published:  26 May, 2004

DEFRA has issued an Order under the Diseases of Fish Act 1937, banning the movement of fish to and from Gwinear Pools, Gwinear Farm,Cubert,Newquay, Cornwall comprising the Gwinear Pool, and the Windsor Pool,following an outbreak of a contagious viral disease in common carp.

The outbreak of spring viraemia of carp (SVC) has no implications for

human health, but SVC is a serious viral disease affecting common and

ornamental carp as well as a variety of other species including

tench, roach, rudd, goldfish, pike and wels catfish.

The Order was issued after tests at the CEFAS Weymouth laboratory

confirmed the presence of SVC, a notifiable disease under the

Diseases of Fish Act 1937. Fish Health Inspectors are investigating

the source of the outbreak and tracing any fish that may have been in

contact with fish at the infected site. Before the Order can be

lifted, the site must test negative for SVC for three consecutive

years. Alternatively, the Order could be lifted sooner if the

infected site underwent an approved clearance and disinfection


The clinical signs of SVC can include darkening of the skin, swollen

eyes, abdominal swelling, pale gills, trailing faecal casts and

protrusion of the anus. Infected fish may be lethargic and show areas

of bleeding in the gills and skin.

Anyone noting deaths of carp or any other species susceptible to SVC,

should immediately contact the Centre for Environment, Fisheries and

Aquaculture Science (CEFAS), Weymouth Laboratory.

Anyone who imports, keeps or retails carp or other susceptible fish

should take strict precautions to prevent the spread of SVC and

follow the advice set out in Defra’s advisory booklet “Combating Fish