The Furry Critter Network

Sporotrichosis - Issue Description

Back to Canine Health Issues Menu


Issue Name


Other Names

Issue Description

Canine sporotrichosis can be transmitted in dogs when the sporothrix schenckii fungus entered any part of the body that has been wounded or punctured. This open wound that can be a result of a dogfight, thorn, or a stick, can lead to the spread of the infection in the dog's body.


Affected animals have multiple nodules of infection in the skin and tissues underlying the skin. These nodules may be ulcerated, crusted, and have a draining discharge. If a limb is affected, the infection may spread upward toward the body and may cause inflammation and infection to occur in the lymphatic vessels and lymph nodes nearest the affected limb. Secondary bacterial infections can occur. Sporotrichosis should always be suspected in cats with fight abscesses or wounds that do not heal with proper treatment.


Diagnosing this disease is usually much easier in cats than in dogs. At body temperature, Sporothrix schenckii lives as a yeast form that can be seen on cytology when present. These yeast forms exist in high numbers in the infected nodules of affected cats and are usually identified with relative ease. If cytology is unhelpful in diagnosing sporotrichosis, other testing is available. Fungal culture is probably the next most commonly successful diagnostic tool in the diagnosis of feline sporotrichosis; however, results may take several days to a couple of weeks before they are available. Submission of a sample of tissue for histopathology is another method of diagnosis.


Treatment of Sporothrix schenckii infections may be accomplished with the use of a supersaturated solution of potassium iodide (SSKI) at about half the dosage used in dogs. This solution should be given orally and then continued for at least one month after the nodules completely subside (usually 4-8 weeks). Recurrence of infection is common when treatment has not been administered for a long enough period of time. Side effects of SSKI include vomiting, lethargy, weakness, twitching, and a drop in body temperature. If side effects are severe, alternative therapy may be offered. Such therapy includes ketoconazole or itraconazole, which are general antifungal drugs. Cats have an increased sensitivity to these drugs, however, and may not tolerate their use. Antibiotics for secondary bacterial infections should always be a part of therapeutic plans for sporotrichosis.

Public Health Concerns

Transmission of sporotrichosis from cats to humans is a risk that should not be overlooked. Human contact with the discharge or wound infected with Sporothrix schenckii in a cat may produce pustules, nodules, or painful inflamed growths in the skin of humans. This risk does not appear to occur with canine sporotrichosis, probably because there are so few fungal organisms found in the nodules and discharge of dogs. Veterinarians and veterinary clinic staff, as well as owners of infected cats, are at higher risk. Consultation with a physician is recommended for human sporotrichosis.

Back to Canine Health Issues Menu

Featured Rescues

"Don't Shop ... Please Adopt"

laptop pro


The American Society for the Prevention of Cruelty to Animals® (ASPCA®) was the first humane society to be established in North America and is, today, one of the largest in the world.

Our organization was founded on the belief that animals are entitled to kind and respectful treatment at the hands of humans and must be protected under the law. Headquartered in New York City, the ASPCA maintains a strong local presence, and with programs that extend our anti-cruelty mission across the country, we are recognized as a national animal welfare organization. We are a privately funded 501(c)(3) not-for-profit corporation, and are proud to boast more than 2 million supporters across the country.

The ASPCA’s mission, as stated by founder Henry Bergh in 1866, is “to provide effective means for the prevention of cruelty to animals throughout the United States.”

laptop pro


If you can’t find the pet you’re looking for on Petfinder, don’t give up. Some shelters maintain waiting lists for specific breeds, so don’t be afraid to ask! There are also breed-specific rescues for just about every breed, and most of them post their pets on Petfinder. (Petfinder can even e-mail you when a pet that fits your criteria is posted — just click “Save this Search” at the top of your search results page.)

laptop pro

Rescue Me

Jeff Gold, Founder, Rescue Me! Animal Rescue Network

Jeff Gold lives in Watkinsville, Georgia on the same property as Rescue Me's Animal Rehabilitation Center, with 18 rescue animals. Shown with him in the photo to the left are Maggie, Izzie and Cortez. In 2003, after learning there was nobody doing boxer rescue work in Georgia, Gold founded Boxertown, an organization which helped find homes for over 500 boxers during its first two years. Based upon this success, Gold came up with the vision for Rescue Me! ― a network which helps all breeds of dogs, cats and other animals find good homes, anywhere in the world. is also a free service of Rescue Me! and provides the world's largest and most up-to-date directory of animal rescue organizations for all breeds of dogs, cats and other animals, including a comprehensive directory of wildlife rehabilitators in over 150 countries.