Treatment and Symptoms of Fungal Infections in Dogs

 

Treatment and Symptoms of Fungal Infections in Dogs



What are fungal infections? 

🔹Although fungal infections are less common than either bacterial or viral infections, these infections can be just as serious. 

🔹Fungal infections may occur due to contact with other animals, from the environment, or as a result of the overgrowth of fungi (yeast) that are naturally present in and on your dog's own body.

🔹There are two main categories of fungal infections that your dog could be diagnosed with, systematic fungal infections which affect your dog's major body systems, and localized fungal infections that are typically seen on your dog's skin or external features. 

What are systematic fungal infections in dogs?

Systematic fungal infections reach beyond the skin and invade the inner body systems of your dog.

 These infections can be seen in your dog's lungs, nasal passages, bone or eyes. Below is a list of a few of the most common systematic fungal infections seen in dogs.


Aspergillosis

Aspergillosis is a fungal infection in dogs that is caused by a number of different Aspergillus species which are found in soil all around the world. This fungus is responsible for two main types of infection in dogs:


  • Nasal Apergillosis is typically limited to a dog’s nasal passages and sinuses, although it can go on to spread to the bony nasal structures and occasionally the orbit of the eye and skull. This systematic fungal infection is most often seen in dogs with long narrow heads such as greyhounds and collies. 
  • Symptoms include lethargy, bloody nasal discharge or nosebleeds, nasal pain, sneezing, or pain around the nose area. Treatment typically involves infusing the affected dog's nasal passages with a liquid anti-fungal medication, although a second treatment may be necessary in some cases. Most dogs recover well following treatment.
  • Disseminated Aspergillosis is a more generalized, and deadly fungal infection most commonly seen in German shepherds. In the case of disseminated aspergillosis the fungus enters the respiratory tract of the dog then makes its way into the bloodstream and throughout the dog's body. This fungal infection can affect the dog's organs, muscles or bones. Slow to develop, 
  • symptoms of this infection can include back pain, lameness, loss of appetite, muscle wasting, weakness, vomiting, blood in urine, urinary accidents, swollen lymph nodes and even paralysis. Sadly, the prognosis for dogs with disseminated aspergillosis is poor although in rare cases treatment has been successful. 

  • Cryptococcosis

The fungus Cryptococcus is found in soil around the world but is most abundant in areas where pigeons or other birds gather in large numbers. Dogs generally inhale the fungus, which then leads to lung infection. 

This fungal disease initially affects the dog's respiratory tract, but can go on to affect the central nervous system, eyes, and skin. Symptoms of cryptococcosis in dogs range from lethargy, coughing, nasal discharge, eye problems, and skin lesions, to seizures and other neurologic abnormalities. 



Treating cryptococosis can be challenging. While the most common treatment is an oral antifungal medication, it may need to be administered for a year or longer. Sadly, many dogs are unable to recover from this fungal infection.

Blastomycosis

Caused by the fungus Blastomyces dermatitidis, blastomycosis most commonly takes the form of a lung infection that is typically diagnosed in young male hunting dogs that have spent time in Mississippi, Ohio, Missouri, Tennessee, the St. Lawrence River valley, the mid-Atlantic, and around the Great Lakes. This fungus thrives near beaver dams and other areas where moist acidic soil rich in decaying vegetation exists, although it is also found in pigeon and bat feces. Hunting dogs that spend a lot of time sniffing around in the soil are at the highest risk for inhaling fungal spores. 

Symptoms of blastomycosis in the lungs include coughing, fever, lethargy, loss of appetite, and weight loss, however, if the infection reaches other areas of your dog's body symptoms such as lameness, blood in urine, eye problems, skin lesions (particularly around the toenails), and fever may be evident. When diagnosed and treated early treatment with an oral anti-fungal medication can be curative.

What are localized skin fungal infections in dogs?

Fungal infections that affect your dog's skin can be difficult for pet parents to recognize since the itching and scratching that goes hand-in-hand with these infections is often thought to be the result of dry skin or flea bites. There are two common forms of skin fungal infections that our Bartlett vets commonly see in dogs.


Ringworm

Dermatophytes in dogs, more commonly known as ringworm, is caused by a collection of pathogenic fungi.

 Ringworm in dogs is extremely contagious and is spread through direct contact with the fungus. This can happen when a dog comes in direct contact with an infected animal,  person, or object such as a couch, comb, bowl, bedding, or carpet. Ringworm can affect your dog’s skin, fur, or nails. 

Symptoms of this common fungal infection include hair loss, itching, flaky or crusty skin, and misshapen or brittle nails. Early detection and treatment is essential for preventing the spread of ringworm to other household pets or people! 



Treatment for ringworm in dogs will depend upon the severity of the infection but may include a combination of medicated baths and dips and/or oral antifungal medications. Vacuuming and disinfecting the house frequently is also a necessary step in preventing the spread of ringworm to others in the home.


Fungal Dermatitis

Fungal dermatitis, also called yeast dermatitis or Malessezia dermatitis is a fungal infection in dogs caused by the Malessezia pachydermatis fungus. This relatively common inflammatory skin condition can occur when the yeast that normally lives in your pet’s ears, mucocutaneous areas and skin, reproduces uncontrollably and overpopulates these areas.

 Symptoms of this fungal infection include intense itchiness, flaky or crusty skin particularly around your dog's nails, skin folds, armpits and anal area but can also include ear infections.

 Treatment can include antibiotics, along with topical anti-fungal treatments such as shampoos, or ear ointments.

Treatment of fungal dermatitis can be a long-term effort. If your dog has an underlying issue such as a compromised immune system or allergy, how well these conditions can be treated and controlled will determine the outcome. Some dogs will experience secondary yeast or bacterial skin infections along with severe skin allergies, in many cases two to three times each year. If this is the case, your veterinarian can develop a custom treatment plan for your dog to help manage the condition.

Yeast Infections

Most of us are relatively common with yeast infections, which are caused when the naturally-occurring yeast on our bodies begins to multiply uncontrollably. Dogs are just as prone to yeast infections as humans are, although some canines suffer from chronic, repetitive cases. 


Typical characteristics of a yeast infection include:

  • Chronic ear infections
  • Dry, flaky skin
  • Itching
  • Musty odor from the area
  • Redness
  • Thickened areas of skin

Again, yeast infections are completely treatable, and your vet will probably recommend a combination of topical medications including ointments and shampoos. In some instances, oral medication may also be necessary. 

 

If you think that your dog might be suffering from a fungal infection, you should make an appointment with veterinarian who can assess your pet’s condition and get him started with the most relevant treatment. 

Thank you🙂


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