Cat fungal infections can affect different parts of the body, from the skin to the respiratory system and even internal organs. These infections happen when cats are exposed to fungal spores in the environment, which can enter the body through inhalation, ingestion, or wounds on the skin.

While many fungi live harmlessly in the environment, certain types can cause serious infections in cats, especially those with weakened immune systems. In this blog, we’ll discover all about it and know how to treat fungal infections in cats.

There are a ton of cat fungal diseases because of how many species there are. We’ve narrowed it down to some of the most common ones. 

1. Ringworm 

Ringworm is one of the most common types of cat fungal infections. Despite its misleading name, this is not caused by worms, but by fungi called dermatophytes. This fungal disease mainly affects the cat’s skin, hair, and nails. Plus, it’s also highly contagious. 

This means cats can easily get ringworm by touching infected animals and contaminated spaces. The signs of ringworm include:

• Circular patches of hair loss

• Red, scaly, and inflamed skin

• Brittle nails

• Itching and discomfort

The treatment for this cat fungal infection will revolve around antifungal creams, ointments, and shampoos. Since it’s contagious, home cleaning is crucial. 

2. Cryptococcosis

Another dangerous type of fungal infection in cats is cryptococcosis. This is a respiratory infection that can also lead to eye, skin, and nervous system damage. 

The main causes of this cat fungal disease are Cryptococcus neoformans and Cryptococcus gattii. They can generally be found in decaying wood, soil, and bird droppings. Common signs are: 

• Persistent sneezing with discharge

• Swelling around the nose or face

• Weight loss, lethargy, and reduced appetite

• Breathing difficulties

Cryptococcosis is treated with long-term antifungal medication like fluconazole and itraconazole. Sometimes, surgical removal of lesions and affected tissues will be required. 

3. Aspergillosis

Aspergillosis is a cat fungal disease caused by fungi from the Aspergillus family. This disease mostly affects the nasal passageways and sinuses. However, it can also spread to other organs like the lungs.

Cats typically contract aspergillosis by inhaling fungal spores from contaminated environments. The signs are: 

• Chronic sneezing and nasal discharge

• Swelling or pain around the nose and face

• Lethargy and fever

• Respiratory, gastrointestinal, and neurological issues

The primary treatment for aspergillosis in cats is antifungal medication. In some cases, surgery may be needed to remove the fungal growths blocking the airways. 

4. Histoplasmosis

Another type of fungal infection in cats is histoplasmosis, caused by Histoplasma capsulatum. It typically begins in the lungs but can spread to other organs, such as the liver, spleen, and bone marrow.

This fungal disease gets into cats when they inhale or ingest the spores from soil contaminated with bird or bat droppings. The signs include: 

• Fever, lethargy, and weight loss

• Coughing, difficulty breathing, and discharge

• Vomiting and diarrhea

• Enlarged lymph nodes

Treatment will usually last 6 months to a year, and will involve antifungal medications, oxygen therapy, and IV fluids. 

5. Sporotrichosis

Sporotrichosis is caused by the fungus Sporothrix schenckii. It primarily affects the cat’s skin, but can also spread to the lymph nodes and internal organs in severe cases. What’s worse is that this fungal disease is zoonotic, meaning cats can spread this disease to humans. 

Cats usually contract sporotrichosis from contaminated soil, plants, and organic matter. The fungus enters through open wounds and scratches on the skin, but can also spread through inhalation. Common signs are: 

• Small, firm bumps or nodules on the skin

• Crusty or ulcerated skin lesions

• Fever, lethargy, and anorexia

• Respiratory problems

Sporotrichosis is usually treated with long-term antifungal therapy, with itraconazole as the common option. In severe cases, potassium iodide will be used. The whole course of treatment can span several months.