These pigs had acquired lungworm infestations presumably containing masked influenza virus under natural conditions.
这些猪在自然条件下已受到含有隐蔽流感毒的肺丝
。
These pigs had acquired lungworm infestations presumably containing masked influenza virus under natural conditions.
这些猪在自然条件下已受到含有隐蔽流感毒的肺丝
。
As a rule the swine infested with the lungworms carrying the "masked virus" did not develop swine influenza immediately upon infestation with the lungworm.
通常,受到携带了“隐蔽毒”的肺丝
侵袭的猪,
肺丝
的侵袭立即发
流感。
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