Press release

Koi herpesvirus disease outbreak confirmed in Hampshire

Koi herpesvirus (KHV) disease has been confirmed in koi carp (Cyprinus carpio) in a fishery at Longbridge Lake, Hampshire.

An outbreak of KHV disease has been confirmed at Longbridge Lake, Lee, Romsey, Hampshire.

The site is now subject to statutory controls to prevent or limit the spread of the disease. The Fish Health Inspectorate (FHI) at Cefas, acting on behalf of Defra has issued a confirmed designation prohibiting the movement of fish to, from and within the fishery complex.

Fishery equipment disinfection and movement control measures are also now in place and anglers must ensure that they comply with all biosecurity measures within the designated area.

The fishery owners voluntarily closed the affected water as soon as the disease problems began and reported the problem for further investigation.

KHV has no implications for human health. It is nonetheless, a serious viral disease of fish, and is notifiable in the United Kingdom. KHV affects all varieties of common and ornamental carp (Cyprinus carpio) including carp hybrids and can result in high rates of fish mortalities.

Clinical signs of KHV disease may include white or necrotic patches on the gills, rough patches on the skin, sloughing mucous and sunken eyes. These signs usually appear when water temperatures are between 16 and 28 degrees centigrade. Anyone noting deaths in carp or carp hybrids, with signs of disease similar to those above, or have suspicion of notifiable disease in any aquatic animal, should immediately contact the FHI.

Anyone who imports, keeps, fishes for, or retails carp (common and ornamental) and carp hybrids should take precautions to prevent the spread of KHV.

Fish Health Inspectorate

Additional notes

  1. Cefas is an executive agency of the Department for Environment, Food and Rural Affairs (Defra). The Fish Health Inspectorate (FHI), based at Cefas’ Weymouth laboratory, is dedicated to maintaining and improving fish and shellfish health in England and Wales. Its primary role is to act for Defra and Welsh Government (WG) in undertaking statutory and inspection duties resulting from the EU fish health regime and other national legislation in the area of fish and shellfish health. The FHI is responsible for health certification of fish and shellfish movements from other countries, and runs an enforcement programme aimed at preventing the illegal importation of these animals.
  2. Koi herpesvirus (KHV) is a notifiable disease under The Aquatic Animal Health (England and Wales) Regulations 2009. Outbreaks of this disease have been subject to statutory control in GB since 2007.
  3. CD04/2014, issued under the Aquatic Animal Health, England and Wales Regulations 2009 restricts the movement of any live fish, including their eggs and gametes, into, out of or within the designated area without the prior written consent of the Fish Health Inspectorate at Cefas and applies additional specific biosecurity measures.