Symptoms and Signs of Ringworm in Dogs


Dermatophytosis is the medical term for a parasitic fungal infection that impacts the skin, hair, and/or nails (claws). The most commonly separated fungal organisms are Microsporum canis (more commonly referred to as ringworm), Trichophyton mentagrophytes, and Microsporum gypseum. This disease happens in dogs, cats, and other mammals. It is identified more commonly in young animals than in old.

The condition or disease described in this medical post can impact both dogs and cats.

Symptoms and Types of Ringworm in Dogs

Symptoms of ringworm in dogs include accumulations of surface skin cells, such as seen in dandruff (scales); poor hair coat; reddened skin (erythema); darkened skin (hyperpigmentation); irritation (pruritus); and hair loss (alopecia), which may be irregular or circular. Other signs of ringworm in dogs that are readily evident on the skin are raised, rounded, knotty (nodular) lesions referred to as granulomatous sores, or boils, and raised nodular lesions that frequently exude (kerions), the result of ringworm infection. There might also be swelling of the claw folds– the folds of skin bordering the nail, and medically described as paronychia.

Periodically, dogs are classified as inapparent providers– harboring the disease-causing fungus, but providing no visible signs of the condition. However, even these dogs are contagious to human beings and other animals.

Causes of Ringworm in Dogs

Dogs most frequently establish ringworm due to the fact that of infections with the fungi Microsporum canis, Microsporum gypseum, and Trichophyton mentagrophytes. The occurrence of each fungus differs according to your geographical area.

Diseases or medications that reduce the body’s capability to establish a typical immune response (known as immunocompromising diseases, or immunosuppressive medications, respectively) can increase the possibility that your dog will be prone to a fungal infection of the skin, hair, and/or nails, in addition to increase the capacity for a more severe infection. Environments that are largely occupied with animals (for instance, in an animal shelter or kennel), or where there is poor nutrition, poor management practices, and lack of appropriate quarantine duration, will likewise increase risk of infection.

Medical diagnosis

Your vet will perform a fungal culture of skin clippings, a tiny examination of a sample of hair, and possibly a skin biopsy.

Treatment for Ringworm in Dogs

A lot of dogs can be treated on an outpatient basis, however quarantine treatments need to be thought about due to the infective and zoonotic (infectious to people) nature of some types of dermatophytosis. If your vet has to recommend antifungal medications, using an Elizabethan collar (a broad collar positioned around the neck) is suggested to prevent intake of antifungal medications applied to the dog’s skin.

Living and Management

A fungal culture is the only means of genuinely monitoring your dog’s reaction to treatment. Numerous animals will enhance clinically, but remain fungal culture favorable. It is advisable to duplicate fungal cultures towards the end of treatment, and continue treatment up until at least one culture result is negative. In resistant cases, fungal cultures may be repeated on a weekly basis, and treatment continued until two to three consecutive unfavorable results are acquired. Complete blood counts should be carried out weekly or biweekly for animals getting griseofulvin, an anti-fungous antibiotic. Likewise, blood work to keep an eye on the liver might be suggested for dogs receiving ketoconazole or itraconazole, two types of anti-fungal medications.


To prevent reinfection from other animals, using a quarantine period, and fungal (dermatophyte) cultures of all animals living in the home are required. Treatment of exposed animals ought to be considered to avoid repetitive development of infection. The possibility of rodents assisting in the spread of the disease should be considered. If you believe that your dog has access to rodents, or that rodents are in your instant environment, it is extremely encouraged that you take the essential steps to eliminate the pests.


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