Koi Herpesvirus: What You Need To Know About This Highly Infectious Fish Disease
Koi Herpesvirus is a highly virulent virus. It is found in all varieties of koi and common carp. It's an OIE reportable disease and is found all over the world. The disease is caused by Cyprinid herpesvirirus-3. All koi owners should be aware of the clinical signs of this disease. The most common sign of KHV is multiple deaths. Fish may be lethargic or have a decreased appetite before death. Similar clinical signs can be seen in other viral diseases. A full physical exam of all remaining fish and water quality testing is critical. Carriers of Koi virus are not usually persistent shedders. They are more likely to shed viral particles when they are stressed. There is no cure for the disease. High water temperature up to 86 degrees F (30 C) has been shown to stop the viral infection and help the koi recover. Good water quality, high oxygen saturation in the water and treatment of secondary bacterial infections are important in helping the fish survive. Koi herpes virus is a virus that affects fish. All testing is required to be submitted by a veterinary professional who will discuss positive results with you before bringing your fish home. Incubation time for KHV in humans and most other fish has been reported in goldfish and some goldfish x common carp hybrids. These other species can carry the disease and never show clinical signs. Testing is available to be sure they are not carrying the virus. . . .