Governments Fish Health Inspectorate have detected multiple outbreaks of fish related herpes in the south of England and Wales.

Koi herpesvirus (KHV) is a viral disease which is common in many varieties of carp (common, Koi, Ghost etc) during warmer weather (+16°C). The virus is particularly nasty and infected bodies of water can see 100% mortality in carp stock. Infected fish spread the virus in faeces, urine, mucus from the gills and skin.

Dead carp in a fishery lake

This summer, the FHI applied ‘disease controls’ to fisheries in Essex, Oxfordshire and Warwickshire; and also to a ‘Tropical fish supplier‘ in West Sussex. Disease controls are used to monitor sites while owners try and get control of the virus; However, sites can also choose to ‘cull and disinfect’ their fish stocks which avoids the need for monitoring.

Cases of Fish with KHV occur when the water temperature is between 16 and 28 °C; Infected fish can be identified by necrotic (white or brown) patches on the gills, rough patches on the skin and sunken eyes.

If you suspect an outbreak of fish herpes, contact the FHI.

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