A kind of attenuated strain of muscovy duck C subtype avian metapneumovirus and its preparation and application
Patent Information
- Authority / Receiving Office
- CN Β· China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- WENS FOODSTUFF GRP CO LTD
- Publication Date
- 2021-07-30
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Abstract
Description
technical field
[0001] The invention belongs to the field of microbial animal viruses, and in particular relates to an attenuated strain of muscovy duck subtype C avian metapneumovirus and its preparation and application. Background technique
[0002] Avian metapneumovirus is one of the acute and highly contagious diseases of upper respiratory tract infection caused by avian metapneumovirus (aMPV). Avian lung disease was first isolated in young turkeys, accompanied by clinical symptoms such as sneezing, tracheal rales, sticky secretions in the nose and eyes, and conjunctivitis. Therefore it is called turkey rhinotracheitis. In South Africa in 1978, aMPV was first isolated and subsequently reported in Europe, Asia and South America. In 1998, my country first reported the isolation of avian pneumovirus A subtype in chickens with swollen head syndrome, and in 2012, B and C subtypes were successively isolated in chickens. In July 2010, in a duck farm in Guangdong Province, a ...