Here we show that (i) CNGV propagates and induces severe cytopathic effects at 3 to 5 days postinfection (p.i.) in fresh koi fin cell (KFC) cultures; (ii) cloned CNGV harvested from KFC cultures induces the same disease upon inoculation of healthy koi and common carp, with a mortality rate of 75 to 95%; (iii) the amounts of CNGV DNA and specific viral antigens in the kidney and blood increase during the first 7 days p.i.; and (iv) the virus induces progressive pathogenic effects in the kidney, liver, and gills, as shown by histological and immunohistochemical examinations. Vol 37:4(1995), pp 159-173. In such cases the disease is likely to cause mortalities in the new naive Koi so the disease progress is not identical in all cases. The gills of the infected fish show serious tissue damage. These types of tests are designed to identify the genetic material of the target virus, and are particularly useful for detecting viruses that are difficult to grow in the lab. The principal host species in which IMNV is known to cause significant disease outbreaks and mortalities in farmed populations is P. Property owners are responsible for fish removal from their own properties.

Although the disease is highly contagious and extremely virulent, morbidity and mortality are restricted to koi and common carp populations (16). Mortality rates in exposed fish can increase to greater than 95 per cent. carpio carpio and C. Dependent on the cell populations targeted by individual herpesviruses, latency may only require genome maintenance when nonproliferative cells such as neurons are infected. ↵*Corresponding author. 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. Additional notes Cefas is an executive agency of the Department for Environment, Food and Rural Affairs (Defra).


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. Stakeholders now receive a more effective and efficient service. A recent addition to this list is the new and emerging condition, Carp Edema Virus. The fish’s gills are pale, the stomach is distended. 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. This review intends to provide a complete overview of the knowledge currently available on CyHV-3. 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.

Whelan says it’s illegal to move live fish from one body of water to another, and it’s just a bad idea. Anyone who imports, keeps, fishes for, or retails carp (common and ornamental) and carp hybrids should take precautions to prevent the spread of KHV. These signs usually appear when water temperatures are between 16 and 28 degrees centigrade. These signs usually appear when water temperatures are between 16 and 28 degrees centigrade. Locations downriver from Lake Havasu may be impacted as this virus runs its course through the river system. The fish were given treatments and the garden did not auction off its infected koi, Schelin said. KHV affects all varieties of common and ornamental carp (Cyprinus carpio) including carp hybrids and can result in high rates of fish mortalities.

KHV affects all varieties of common and ornamental carp (Cyprinus carpio) and can result in high rates of fish mortalities. auratus langsdorfii, nagabuna C. It has also had negative environmental implications by affecting wild carp populations. KHV affects all varieties of common and ornamental carp (Cyprinus carpio) including carp hybrids and can result in high rates of fish mortalities. Virus was enveloped at the nuclear membrane and in cytoplasmic vacuoles, resulting in virions having a diameter of 175 to 200 nm. Due to the long time storage at the nonstandard temperature of smelt virus the biological and genomic analysis of the HVOE1 was hampered. It is nonetheless, a serious viral disease of fish, and is notifiable in the United Kingdom.

A sample was taken from the affected site following reported deaths of fish showing clinical signs associated with this disease. 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. Fishery equipment disinfection and movement control measures are in place and anglers must ensure that they comply with all biosecurity measures within the designated area. Samples taken from the affected site were confirmed as positive for oyster herpesvirus (OsHV-1 µvar), and a Containment Area has been declared in the River Blackwater Estuary, Essex and the River Colne Estuary, Essex.