bird disease fowlpox diphtheria, fowl pox, Bird A poxvirus infection of poultry and other birds characterized by the formation of wart-like nodules on the skin and diphtheritic necrotic masses (cankers) in the upper digestive and respiratory tracts. Birdpox Bird pox epithelioma contagiosum MESH:D005586 fowl pox Diphtherias, fowl Variola avium pox, fowl MONDO:0025417 fowl diphtheria fowl Diphtherias