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Diseases of finfish

Viral diseases—Spring viraemia of carp

CLICK ON IMAGE TO ENLARGEspring viraemia of carp

Spring viraemia of carp in European carp. Note characteristic haemorrhagic skin, swollen stomach and exophthalmus ('pop eye')

Source: HJ Schlotfeldt


Signs of disease

Important: animals with disease may show one or more of the signs below, but disease may still be present in the absence of any signs.

Disease signs at the farm level
Disease signs at the tank and pond level
Clinical signs of disease in an infected animal
Gross signs of disease in an infected animal

Disease agent

Spring viraemia of carp (SVC) virus is a rhabdovirus closely related to infectious haematopoietic necrosis virus and viral haemorrhagic septicaemia virus.

Host range

Fish known to be susceptible to SVC:
bighead carp* (Aristichthys nobilis)
common carp and koi carp* (Cyprinus carpio) — species most susceptible
crucian carp* (Carassius carassius)
goldfish* (Carassius auratus)
grass carp* (Ctenopharyngodon idellus)
ide* (Leuciscus idus)
pike* (Esox lucius)
silver carp* (Hypophthalmichthys molitrix)
tench* (Tinca tinca)
wels catfish (sheatfish)* (Silurus glanis)
guppy (Poecilia reticulata)
pumpkinseed (Lepomis gibbosus)
roach (Rutilus rutilus)
zebra danio (Danio rerio)

Nonpiscine carriers include:
heron (Ardea cinerea)
leeches (Piscicola spp)
louse (Argulus foliaceus)

* naturally susceptible (other species have been shown to be experimentally susceptible)

Presence in Asia–Pacific

Map showing presence in Asia–Pacific

SVC has been officially reported from China and Iran.


Differential diagnosis

The differential diagnostic table The differential diagnostic table and the list of similar diseases appearing at the bottom of each disease page refer only to the diseases covered by this field guide. Gross signs observed might well be representative of a wider range of diseases not included here. Therefore, these diagnostic aids should not be read as a guide to a definitive diagnosis, but rather as a tool to help identify the listed diseases that most closely account for the gross signs.

Similar diseases

Enteric septicaemia of catfish

Sample collection

Because of uncertainty in differentiating diseases using only gross signs, and because some aquatic animal disease agents might pose a risk to humans, you should not try to collect samples unless you have been trained. Instead, you should phone your national hotline number and report your observations. If samples have to be collected, the agency taking the call will advise you on what you need to do. Local or district fisheries/veterinary authorities could advise you on sampling.

Emergency disease hotline

For your national emergency disease hotline number, see Whom to contact if you suspect a disease.

Further reading


The currently accepted procedures for a conclusive diagnosis of SVC are summarised at http://www.oie.int/eng/normes/fmanual/A_00021.htm

These hyperlinks were correct and functioning at the time of publication. spring viraemia of carp spring viraemia of carp

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