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CCVD-affected channel catfish fingerling. Note swollen CCVD-affected channel catfish fingerling. ‘pop eye’ stomach and L Hanson Source: ) Aquatic Animal Diseases Significant to Asia-Pacific: Identification Asia-Pacific: Animal Diseases Significant to Aquatic ) © Commonwealth of Australia 2007 © Commonwealth of ) acknowledgment of the source and no commercial usage or sale. 1) . Australian Government Department of Agriculture, Fisheries and Forestry. Canberra. Fisheries and Forestry. Agriculture, Australian Government Department of . Ictaluris catus Ictaluris punctatus Ictaluris furcatus ( ( ( Field Guide This work is copyright. It may to the be reproduced in whole or in part subject This work is copyright. Sourced from AGDAFF–NACA (2007) Sourced from

Channel catfish virus disease catfish virus Channel Ictalurid herpesvirus extensive necrosis of renal tubules and extensive necrosis of renal tubules interstitial tissues of the kidney haemorrhaging of muscle haemorrhaging exophthalmus (pop eye) of fins haemorrhaging ascites (swollen abdomen from accumulated ascites (swollen abdomen from accumulated fluid) mortality high mortality in fryhigh mortality in and juvenile catfish * naturally susceptible (other species have been shown to be experimentally susceptible) blue catfish* channel catfish* white catfish Host range Fish known to be susceptible to CCVD: Channel catfish virus disease (CCVD) is caused by a herpesvirus ( Disease agent • Gross signs of disease in an infected animal Gross signs of disease in an infected • • • • Clinical signs of disease in an infected animal Clinical signs of disease in an infected Disease signs at level the tank and pond • Disease signs at the farm level • present in the absence of any signs. present in the absence Signs of disease Signs of with disease may show one or Important: animals be but disease may still below, more of the signs Diseases of finfish of Diseases Viral diseases— exotic exotic exotic exotic exotic exotic exotic exotic exotic exotic exotic PAGE 2 PAGE inclusion of an

C, but decreases with temperature and C, but decreases with temperature ° Aquatic Animal Diseases Significant to Asia-Pacific: Identification Asia-Pacific: Animal Diseases Significant to Aquatic © Commonwealth of Australia 2007 © Commonwealth of acknowledgment of the source and no commercial usage or sale. . Australian Government Department of Agriculture, Fisheries and Forestry. Canberra. Fisheries and Forestry. Agriculture, Australian Government Department of . Field Guide This work is copyright. It may to the be reproduced in whole or in part subject This work is copyright. Sourced from AGDAFF–NACA (2007) Sourced from C. ° ceases at 18 fish that are less than one year old, and generally in fish less than four months old. fish that are less than one year old, exceeds 27 Mortality is highest where water temperature Susceptibility appears to vary according to the strain of channel catfish. in to outbreaks of the CCVD, the disease occurs almost exclusively Although older fish are susceptible Vertical transmission is believed to be common. However, because no infectious virus has been found because no infectious virus However, is believed to be common. transmission Vertical spawning, this mechanism has not been proven. on the skin or sexual products at Survivors of CCVD remain covert carriers of the virus. er, and from virus carried by animate and from virus carried shed in water, occurs directly from virus Horizontal transmission vectors and on fomites. For your national emergency disease hotline number, see Whom to contact if you suspect a disease. For your national emergency disease hotline number, Emergency disease hotline Emergency been trained. Instead, you should phone your national hotline number and report your observations. If samples have to be collected, the agency taking the call will advise you on what you need to do. Local or district fisheries/veterinary could advise you on sampling. authorities Because of uncertainty in differentiating diseases using only gross signs, and because some aquatic animal disease agents might pose a risk to humans, you should not try have to collect samples unless you Enteric septicaemia of catfish Sample collection Similar diseases Therefore, these diagnostic aids should diseases not included here. Therefore, these diagnostic aids representative of a wider range of diagnosis, but rather as a tool to help identify the listed diseases not be read as a guide to a definitive gross signs. that most closely account for the ses appearing at the bottom of each and the list of similar diseases appearing at the bottom of each The differential diagnostic table covered by this field guide. Gross signs observeddisease page refer only to the diseases might well be Differential diagnosis • • • • • • Epidemiology Presence in Asia–Pacific Presence Asia–Pacific region under the NACA–FAO–OIE not been officially reported in the EXOTIC — has animal disease reporting program. quarterly aquatic Channel catfish virus disease continued disease virus catfish Channel exotic exotic exotic exotic exotic exotic exotic exotic exotic exotic exotic PAGE 3 PAGE

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Aquatic Animal Diseases Significant to Asia-Pacific: Identification Asia-Pacific: Animal Diseases Significant to Aquatic m © Commonwealth of Australia 2007 © Commonwealth of acknowledgment of the source and no commercial usage or sale. . Australian Government Department of Agriculture, Fisheries and Forestry. Canberra. Fisheries and Forestry. Agriculture, Australian Government Department of . Field Guide This work is copyright. It may to the be reproduced in whole or in part subject This work is copyright. Sourced from AGDAFF–NACA (2007) Sourced from These hyperlinks were correct and functioning at the time of publication. were correct and functioning at These hyperlinks CCVD are summarised at diagnosis of CCVD are summarised procedures for a conclusive The currently accepted http://www.oie.int/eng/normes/fmanual/A_00023.ht Further reading http://www.oie.int/aac/eng/cards/en_diseasecard.htm Channel catfish virus disease continued disease virus catfish Channel