Ringworm in a Cow

Identification

• Cattle with ringworm will have gray-white areas of skin that are flaky. These spots are usually circular and slightly raised. The size can range from very small to very large. Calves will usually exhibit ringworm around the eyes and back, while adult cattle show it on their chest and legs.

Infection

• Ringworm is a fungus that is spread only through direct contact. Some calves may be infected but have a natural immunity that keeps them from developing lesions. These calves can still be a source of infection.

Treatment

• Treatment is a topical anti-fungal treatment applied directly to the lesion. Any crust on the lesion should be removed by scraping or brushing. The scabs should be collected and burned to prevent contamination of the ground. There are oral treatments, such as Griseofulvin, but the treatment procedure and expense limits this to very valuable animals, such as show cattle.

Reasons to Treat

• Because ringworm causes no serious problems and will heal on its own, it can often be argued that there is no reason to treat cattle for ringworm. However, the fungal infection can easily spread to people, especially children. Further, infected cattle are often not allowed at sales or shows, and interstate travel may also be prohibited.

Prevention

• Whenever in contact with infected cattle, it is important to wear gloves. All contact surfaces (bedding, halters, grooming equipment, pens, squeeze chutes and barn surfaces) should be pressure washed or scrubbed with soap and water to remove any organic materials. They should then be sprayed with one part bleach to three parts water.