51茶馆

颁辞苍迟别苍迟蝉听

1. How to spot KHV
2. How KHV is spread
3. Preventing and controlling KHV
4. Further information on KHV
5. Legislation relating to KHV
6. Who to contact if you suspect KHV

Koi herpesvirus (KHV) is a highly contagious viral disease, causing serious disease outbreaks in all varieties of common carp (Cyrinus carpio) including mirror carp, leather carp, koi carp and ghost carp. It can cause mortality rates of up to 100%.听

More information on susceptible and vector species can be found here: Susceptible and vector species - 51茶馆 (www.gov.uk)

KHV is present in Great Britain and is a 鈥楲颈蝉迟别诲鈥� (also referred to as 鈥榥otifiable鈥�) disease which you are legally obligated to report immediately to the Fish Health Inspectorate (FHI), Cefas.

KHV was first recorded in Israel in 1998 following large scale mortalities of farmed carp. It is known to occur in over 28 countries including Great Britain.听

In Great Britain (England and Wales) outbreaks occur every summer in carp populations in recreational fisheries, and on occasion in ornamental koi carp. Disease outbreaks are subject to official controls to prevent further spread. These controls vary according to the water(s) or type of facilities affected and the potential risk of disease spread.听

It does not affect humans.听

How to spot KHV听

The disease occurs in water temperatures between 16掳C and 29掳C. Stress events can trigger an outbreak. Fish often become lethargic and gather at water inlets or in the shallows.听听

Signs of the disease can include:听

• Patches of dead (necrotic) tissue in the gills, often with secondary fungal or bacterial infection. Gills may also appear pale听听
• Sunken eyes听
• Over or under production of mucus听
• Rough, dry patches of skin听
• Sloughing of mucus听
• Appearance of bleeding on skin and base of fins听
• Patchy pale colouration or reddening of the skin听

How KHV is spread听

KHV is spread through contact with infected fish or water. Virus is released via faeces, urine, gills and skin.听听

KHV can be spread through movements of infected fish, contaminated water, and contaminated equipment such as husbandry, angling and fish transport equipment.听

Infected fish do not have to be sick or diseased to spread the virus.听

Preventing and controlling KHV听

There is no treatment for KHV.听听

Prevention is the best approach to disease control. You can protect your fish by being aware of the signs of KHV and other serious diseases and checking stock health regularly.听听

Implement good husbandry and biosecurity practises. Further information on biosecurity measures plans, guidance and templates can be found here: Biosecurity Measure Plans - Information and Templates - 51茶馆 (www.gov.uk)听

Do not buy fish of unknown origin. Follow the rules on importing, exporting or moving aquatic animals: Aquatic animal health and movements guides - 51茶馆 (www.gov.uk)听

You must report it to the FHI immediately if you notice or become aware of fish showing any of the signs of KHV. The FHI will investigate and apply disease control measures if required.听

Further information on KHV听

KHV.听

Legislation relating to KHV听

2009听听

The listed diseases are in and .听

Who to contact if you suspect KHV听

If you suspect or know of a listed disease of fish or shellfish in England and Wales, you must report it immediately to the Fish Health Inspectorate (FHI), Cefas. You must also tell the FHI immediately if you know or suspect that increased mortality has occurred.听听

Under the Aquatic Animal Health (England and Wales) Regulations 2009 it is a legal obligation to report suspicion of KHV in any farmed or wild fish to the FHI. It is an offence under the Regulations to fail to inform the FHI of suspicion of KHV.听听听

• 贰尘补颈濒:鈥�fhi@cefas.gov.uk听
• Telephone: 01305 206700听- Monday to Thursday - 9:00 am to 5:00 pm, Friday 9:00 am to 4:30 pm听
• For emergencies out of hours telephone: 01305 206630听