scab. 1  An incrustation over a sore, wound, vesicle, or pustule, formed during healing. 2  The mange, especially when it appears on sheep. 3  Any of several different diseases of potatoes producing pits and other damage on their surface, caused by streptomyces bacteria (but formerly believed to be caused by a fungus).
Diabetes complications from fungus infections in the toenails and fingernails can lead to amputations of the entire limbs. To understand how serious fungal toenails can be to a diabetic, you must first understand how diabetes affects the body.
Plant Health Problems. Diseases caused by Fungi: Dutch elm disease, Ophiostoma novo-ulmi. This disease has important historical significance, especially here in Connecticut. The causal fungus is carried in the mouth and on the bodies of the elm bark beetle, and trees are inoculated during feeding in the early spring.