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| Turkey viral hepatitis ： ウィキペディア英語版 |
Turkey viral hepatitis
The aetiological agent of turkey viral hepatitis is a virus from the Picornaviridae family.
The disease is restricted to turkeys and is highly contagious but usually subclinical. It usually present in young birds under the age of 6 weeks.
It has been seen in Canada, Italy, the US and the UK.
Transmission is thought to be via the faeces and vertical transmission may also occur.
==Clinical signs and diagnosis==
Affected turkeys may show systemic signs such as anorexia, lethargy and death. Hepatic encephalopathy occurs secondary to liver involvement.
Egg hatching and production can be affected.
Diagnosis relies on isolation of the virus from samples of internal organs or the faeces inoculated into embryonated chicken eggs.
The main necropsy findings are multiple necrotic lesions on the liver and sometimes the spleen.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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