Ringworm in cattle is usually associated with enclosed housing. Turning cattle out may lessen the severity and duration of disease. Treatment of cattle is often unrewarding and prevention is unlikely in herds where the disease is established. Ringworm in Humans Ringworm in humans usually develops in 1-2 weeks after contact with infected cattle skin or hair. The spot may be dry or moist.
Affected hair becomes brittle and breaks.
Lesions may or may not itch or be uncomfortable. Without treatment the lesions can linger for weeks to months. Wash your hands after using the restroom. Do not eat, drink, use tobacco products, take or apply medicine, store human food, handle contact lenses or apply cosmetics in animal facilities and laboratories. Wash your hands before engaging in these activities.