appears to be a fungus, maybe Favus. from the Merck Veterinary Manual: Favus, or ringworm, also known as white comb, is a fungal disease caused by Microsporum gallinae, which is of minor importance in all fowl, especially chickens and turkeys. Affected birds have small, white, chalky deposits on the comb, which can enlarge and coalesce to form a dull white, moldy layer that could be several millimeters thick. The disease is self-limiting, and the comb heals after several months. Typically, if the disease is limited to the comb, the health of the bird is not affected, but if feathered portions are involved, the bird may become emaciated and die. Favus is a public health concern. Have you cleaned the area to see what's underneath?
Thank you so much! I will clean the area. Is there something I can treat it with. Is it contagious to me?
