Infectious pancreatic necrosis

Infectious pancreatic necrosis (IPN) is a severe viral disease of salmonid fish. It is caused by infectious pancreatic necrosis virus, which is a member of the Birnaviridae family. This disease mainly affects young salmonids, such as trout or salmon, of less than six months, although adult fish may carry the virus without showing symptoms.^[1] Resistance to infection develops more rapidly in warmer water. It is highly contagious and found worldwide, but some regions have managed to eradicate or greatly reduce the incidence of disease. The disease is normally spread horizontally via infected water, but spread also occurs vertically. It is not a zoonosis.

Clinical signs and diagnosis

A sharp rise in mortality is often seen (depending on the virulence of the disease). Other clinical signs include abdominal swelling, anorexia, abnormal swimming, darkening of the skin, and trailing of the feces from the vent. On necropsy, internal damage (viral necrosis) to the pancreas and thick mucus in the intestines often is present.^[1] Surviving fish should recover within one to two weeks.

Diagnostic methods for the detection of the disease include: characteristic histological pancreatic lesion, PCR, indirect fluorescent antibody testing, ELISA, and virus culture. High virus titers can be isolated from carrier animals.

Treatment and control

Currently, no treatment is available.

Good husbandry measures, such as high water quality, low stocking density, and no mixing of batches, help to reduce disease incidence. To eradicate the disease, very strict protocol with regards to movement, water sources and stock replacement must be in place – and still it is difficult to achieve and comes at a high economic cost.

References

1 2 "Fisheries Research Services". Retrieved 2009-07-03.

External links

Infectious pancreatic necrosis – The Scottish Government: Marine and Fisheries
Infectious Pancreatic Necrosis, reviewed and published by Wikivet at http://en.wikivet.net/Infectious_Pancreatic_Necrosis, accessed 09/09/2011.

Fish diseases and parasites

Pathogens	Aeromonas salmonicida Columnaris Enteric redmouth Fin rot Fish dropsy Flavobacterium Hematopoietic necrosis Heterosigma akashiwo Hole in the head Hypodermal and hematopoietic necrosis Infectious pancreatic necrosis Koi herpes virus Mycobacterium marinum Novirhabdovirus Pfiesteria piscicida Photobacterium damselae ssp piscicida Salmon anemia Streptococcus iniae Spring viraemia of carp Taura syndrome UDN VHS White spot Yellowhead

Parasites	Abergasilus Amoebic gill disease Anisakis Carp lice Ceratomyxa shasta Clinostomum marginatum Dactylogyrus vastator Diphyllobothrium Cymothoa exigua Eustrongylidosis Epizootic ulcerative syndrome Flukes Glugea Gyrodactylus salaris Henneguya zschokkei Ich (freshwater) Ich (marine) Kudoa thyrsites Lernaeocera branchialis Microsporidia Monogenea Myxobolus cerebralis Myxosporea Nanophyetus salmincola Pseudorhabdosynochus spp. Salmon lice Saprolegnia Schistocephalus solidus Sea louse Sphaerothecum destruens Swim bladder disease Tetracapsuloides bryosalmonae Velvet Xenoma

Fish groups	Diseases and parasites in cod Diseases and parasites in salmon Disease in ornamental fish List of aquarium diseases

Related topics	Amnesic shellfish poisoning Brevetoxin Ciguatera Diarrheal shellfish poisoning Fish kill Neurotoxic shellfish poisoning Paralytic shellfish poisoning Saxitoxin

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