top of page

Koi herpesvirus (KHV)

This virus is highly infectious and causes severe gill disease and high mortality when water temperatures are over 16°C. Originally identified in 1999, it primarily affects carp and is present in many countries around the world. The virus, cyprinid herpesvirus 3, is similar to that which causes carp pox. It spreads through direct contact with infected fish or contaminated water and equipment. The disease may be triggered by overstocking or poor water quality. Clinical signs of the disease include sunken eyes, lethargy, loss of appetite and sudden death. There is no treatment and mortality is often between 70-100%. It is a notifiable disease in the UK and cases must be reported to the relevant authorities (eg Cefas). 

Click here for further information.

bottom of page