The lesions are located on the head, neck, tail, and perineum. The typical lesion is a round, whitish crust. Multiple lesions may coalesce in "map-like" appearance. Clinical dermatophytosis is also diagnosed in sheep, dogs, cats, and horses. Causative agents, besides Trichophyton verrucosum, are T. mentagrophytes, T. equinum, Microsporum gypseum, M. canis, and M. nanum.Dermatophytosis may also be present in the holotype of the Cretaceous eutriconodont mammal Spinolestes, suggesting a Mesozoic origin for this disease. Diagnosis
Ringworm in pets may often be asymptomatic, resulting in a carrier condition which infects other pets. In some cases, the disease only appears when the animal develops an immunodeficiency condition. Circular bare patches on the skin suggest the diagnosis, but no lesion is truly specific to the fungus. Similar patches may result from allergies, sarcoptic mange, and other conditions. Three species of fungi cause 95% of dermatophytosis in pets: these are Microsporum canis, Microsporum gypseum, and Trichophyton mentagrophytes. Veterinarians have several tests to identify ringworm infection and identify the fungal species that cause it:
Woods test: This is an ultraviolet light with a magnifying lens. Only 50% of M. canis will show up as an apple-green fluorescence on hair shafts, under the UV light. The other fungi do not show. The fluorescent material is not the fungus itself (which does not fluoresce), but rather an excretory product of the fungus which sticks to hairs. Infected skin does not fluoresce. Microscopic test: The veterinarian takes hairs from around the infected area and places them in a staining solution to view under the microscope.
The disease patterns below identify the type of fungus that causes them only in the cases listed:

Dermatophytosis
Tinea pedis (athletes foot): fungal infection of the feet
Tinea unguium: fungal infection of the fingernails and toenails, and the nail bed
Tinea corporis: fungal infection of the arms, legs, and trunk
Tinea cruris (jock itch): fungal infection of the groin area
Tinea manuum: fungal infection of the hands and palm area
Tinea capitis: fungal infection of the scalp and hair
Tinea faciei (face fungus): fungal infection of the face
Tinea barbae: fungal infestation of facial hair
Other superficial mycoses (not classic ringworm, since not caused by dermatophytes)
Tinea versicolor: caused by Malassezia furfur
Tinea nigra: caused by Hortaea werneckii

Prevention
Advice often given includes:

Avoid sharing clothing, sports equipment, towels, or sheets. Wash clothes in hot water with fungicidal soap after suspected exposure to ringworm. Avoid walking barefoot; instead wear appropriate protective shoes in locker rooms and sandals at the beach. Avoid touching pets with bald spots, as they are often carriers of the fungus. Vaccination
As of 2016, no approved human vaccine exist against Dermatophytosis. For horses, dogs and cats there is available an approved inactivated vaccine called Insol Dermatophyton (Boehringer Ingelheim) which provides time-limited protection against several trichophyton and microsporum fungal strains. With cattle, systemic vaccination has achieved effective control of ringworm. Since 1979 a Russian live vaccine (LFT 130) and later on a Czechoslovakian live vaccine against bovine ringworm has been used. In Scandinavian countries vaccination programmes against ringworm are used as a preventive measure to improve the hide quality.