Infectious Salmon Anemia Virus

A small project about ISAVirus brought to you by a group of Year 2 MBIO students from Ngee Ann Polytechnic.

Click on the pastel orange box on the left for the names of the students involved in this project.

Thank you.

:)

Distribution
Thursday, 26 January 2012 @ 12:33
ISAV outbreaks occur in Norway, Canada, Scotland, Chile, as well as in a limited region of North America shared by the US and Canada. In North America, it only affects the small areas of the Bay of Fundy in New Brunswick, the Cobscook Bay area of Maine, and Passamaquoddy Bay, which is shared by Maine and New Brunswick.


ISAV replicates in Atlantic salmon, which forming a marine reservoir for the virus. Their migration allows distant distribution of the disease to other regions.

The virus can survive in seawater and it is mainly transmitted via the water, virus being shed into it in mucus, faeces, urine, gonadal fluids. It then enters vulnerable fish via the gills or broken skin. It can also be transmitted via crustacean vector.

Transmission of the virus can be done by contact with infected fish or their secretions. Contact with equipment or people who have handled infected fish can also transmit the virus.

ISAV replicates best at the cold temperatures where salmon thrive (5-15°C). The optimal growth temperature for the virus is 10-15°C and it does not replicate in 25°C or higher.

The virus also replicates in other fish species, e.g. rainbow trout, Atlantic cod, chum, coho and Chinook salmon, Arctic Char, but no disease has been observed in these species under aquaculture conditions. However, these species may serve as reservoir hosts for the virus.