Transmission
Reservoirs of IHNV are clinically infected fish and covert carriers among cultured, feral or wild fish. Virus is shed via urine, sexual fluids and from external mucus, whereas kidney, spleen and other internal organs are the sites in which virus is most abundant during the course of overt infection. Insect, annelids and crustaceans may act as viral vectors. The potential for epizootics is highest at 10°C and the disease does not occur naturally above 15°C.
Read more about this topic: Infectious Hematopoietic Necrosis Virus
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