On the identity of the so-called filamentous forms of influenza and fowl pest viruses.
D000818:Animals; D001717:Birds; D006801:Humans; D005585:Influenza in Birds; D007251:Influenza, Human; D009521:Newcastle Disease; D009975:Orthomyxoviridae
FOWL PLAGUE; INFLUENZA VIRUSES; NEWCASTLE DISEASE