UK confirms outbreak of deadly Koi herpesvirus in Milton Keynes

The United Kingdom has confirmed an outbreak of Koi herpesvirus at a fish farm in Aspley Guise, Milton Keynes, on September 10, according to a statement by the UK Government. Koi herpesvirus, or KHV, is a highly contagious viral infection that primarily affects carp species, including common carp and ornamental carp. The virus can cause significant fish mortality, particularly when water temperatures range between 16 and 28 degrees Celsius.

Symptoms of infection include white or brown patches on gills, roughened skin, excessive mucus loss, and sunken eyes. However, the UK authorities have emphasized that KHV poses no threat to human health. In response to the outbreak, movement controls have been implemented to prevent the spread of the virus. Live aquatic animals, including fish eggs and reproductive materials, cannot be moved within or outside the affected area without written authorization from the UK Fish Health Inspectorate.

Dead fish and other aquatic animals must be disposed of using approved methods that comply with environmental health requirements. Facilities impacted by the outbreak are required to enter a formal monitoring program, with regular inspections to detect the disease and ensure compliance with imposed restrictions. Fish owners and operators are obligated to report any further deaths or suspected virus transmission to the inspectorate and seek approval before making any physical alterations to their facilities.

Since 2007, the UK has had statutory controls in place to manage KHV outbreaks, and a surveillance program is also in operation to monitor the disease. Control measures may include restricting fish movement, strengthening biosecurity, removing infected fish, and cleaning and disinfecting affected facilities. Koi herpesvirus is listed under the Aquatic Animal Health (England and Wales) Regulations 2009.

Authorities have advised fish owners and operators to take measures to prevent the introduction and spread of the virus.