Ringworm in Dogs
Ringworm is a fungal infection that affects humans and dogs alike. The only difference is dogs cannot kick the infection without some help from their human handlers. Additionally, ringworm is one of the few infections that can be passed from dog to human and vice versa.
Although there are several different types of fungi that cause ringworm, the 3 most common that affects dogs are trichophyton mentagrophytes, microsporum canis, and microsporum gypseum. These fungi are typically found in areas that have hot, humid climates.
How Dogs Become Infected
Adult dogs tend to develop immunity to the fungi, so ringworm mostly affects puppies with underdeveloped immune systems. Dogs can become infected in the same way humans can: coming into contact with the infected fur of other animals, being touched by infected humans, direct contact with objects used by infected animals such as toys and grooming supplies, and spores found in infected soil.
Symptoms of Ringworm
The infection gets into the fur and hair follicles of the dog and produces the following symptoms:
- Lesion on the paws, ears, face, and tail
- Small pustules inside of the lesions that may get larger over time
- Deformed, cracking, or brittle nails
- Bald spots in the fur
- Red, inflamed skin
- The lesions may become scaly
- Scratching or licking to alleviate itching
Ringworm is often misdiagnosed as mange, which is why you should take your dog to the vet for a proper diagnosis. Ringworm in dogs look green under ultraviolet light, so your vet may use a Wood’s light to help him or her diagnose the dog’s condition. Most often, though, the vet will take a culture and have it tested. It can take up to two weeks to get the results.
Treating Ringworm in Dogs
Many dogs will kick the infection after 3 to 4 months without treatment. Because ringworm is so contagious, it is best not to wait that long to treat the condition. The vet will likely recommend regular baths using antifungal shampoos and dips coupled with a topical antifungal cream. Oral medications such as ketoconazole and griseofulvin may also be prescribed if the dog’s condition is severe enough.
Prevention Methods
While there is a vaccine designed to help dogs resist the fungi that causes ringworm, not every vet uses it and its efficacy is in question. The best way to prevent your dog from becoming infected is to keep him or her away from other humans and animals that have ringworm.
The spores that cause ringworm can survive for a long time. Therefore it is best to get rid of the dog’s bedding and sterilize your home with bleach. Wash all bedding, clothing, dog toys, and linens in hot water with an antifungal cleaner. Vacuum carpets on a regular basis to rid your home of infected pet hair.
If your dog has transferred a ringworm infection to you, read our reviews of some effective ringworm remedies that will help you get rid of it quickly and without side effects.