Diseases of poultry; their etiology, Diseases of poultry; their etiology, diagnosis, treatment, and prevention diseasesofpoultr00pear Year: 1915 CHAPTER XVI Diseases of the Skin Favifs (Baldness or White Comb) This disease of the skin attacks poultry as well as man and the domestic mammals. In mammals it is called tinea favosa or favus. Diagnosis. — The disease usually appears first as small gray white spots on the comb, wattles, eyelids and around ' '''-v the ears, that is, on the un- , iz feathered parts of the head. The spots enlarge and run to- gether forming a scaly crust which become
Diseases of poultry; their etiology, Diseases of poultry; their etiology, diagnosis, treatment, and prevention diseasesofpoultr00pear Year: 1915 CHAPTER XVI Diseases of the Skin Favifs (Baldness or White Comb) This disease of the skin attacks poultry as well as man and the domestic mammals. In mammals it is called tinea favosa or favus. Diagnosis. — The disease usually appears first as small gray white spots on the comb, wattles, eyelids and around ' '''-v the ears, that is, on the un- , iz feathered parts of the head. The spots enlarge and run to- gether forming a scaly crust which becomes thicker until in three or four weeks it may be as much as 8 millimeters ( inch) thick. The scales which make up the crust are often formed in concentric rings, the margins raised and the centers depressed, so that the scale is somewhat cup shaped. When the crust is removed the skin y,-,. :,_>. —Head and neck of a appears irritated and in places fol affected with generalized ., „ . , , favus. (After Pearson.) the surface is somewhat raw. The disease spreads to the feathered parts of the head, the neck and the region around the vent. The base of the 233
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