Outbreaks of Koi herpesvirus (KHV) disease in 2017

KHV is a serious viral disease of fish, and is notifiable in the United Kingdom. It affects all varieties of common and ornamental carp (Cyprinus carpio), and can result in large scale mortalities.

Fish with KHV disease may show the following signs, especially when water temperatures are between 16 to 28 degree centigrade:

  • necrotic (white or brown) patches on the gills
  • rough patches on the skin and sloughing mucous
  • sunken eyes

You must contact the FHI if you suspect an outbreak of KHV. This includes fish with the above signs, or deaths of carp or carp hybrids.

There is no risk to public health.

New outbreaks

When laboratory testing confirms KHV disease at a site, the FHI place statutory controls to limit the spread of the disease. These controls restrict movement of aquatic animals and ensure equipment is disinfected.

Disease controls have been applied at:

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