Rare term; the more common synonym is 鳥インフルエンザ. Used in technical or formal contexts.
See also: 鳥インフルエンザ
鳥類インフルエンザ refers to the same disease as 鳥インフルエンザ, but is not commonly used.
Compound of 鳥類 (birds, avian) and インフルエンザ (influenza), a direct calque of English 'avian influenza'.