Fungal Infection (Malassezia pachydermatis) of the Skin Average Cost

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What is Fungal Infection (Malassezia pachydermatis) of the Skin?

Malassezia pachydermatis is a fungus that is frequently found on the skin and in the mucosa, and ear canals and of dogs. In small numbers, it is asymptomatic, but the fungus can take advantage of a weakened immune system or another disease to multiply and cause an opportunistic infection. This is called malassezia or yeast dermatitis. Most dogs with this infection have patches of itchy, flaky or crusted skin. The fungus flourishes in conditions of humidity, so symptoms will develop around moist areas such as the eyes or groin, or in between the claws. Malassezia can also cause ear infections, usually otitis externa. Yeast dermatitis often develops due to excess oil in the skin and is more common in dogs with folding or pouched skin. A fungal infection may be caused by allergies that make the skin oily, or it can be a sign of more serious disease such a staph infection or an endocrine imbalance. Dogs taking immunosuppressant drugs are particularly at risk. Most cases will clear up with antifungal treatment, but dogs with recurrent symptoms may need continuous treatment. This type of fungal infection is not contagious so it will not spread to other dogs.

Malassezia pachydermatis is a fungus that is found naturally in small numbers on most dogs. It can multiply and cause skin infection in dogs that weak or unhealthy, or have oily skin from allergies. This is called malassezia dermatitis or yeast dermatitis. It usually clears up with antifungal treatment.

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Symptoms of Fungal Infection (Malassezia pachydermatis) of the Skin in Dogs

Take your dog to see a veterinarian if you notice any of the following symptoms.

  • Thickened skin
  • Hyperpigmentation (areas of darkened skin)
  • Red areas
  • Dry flaky skin (seborrhea sicca)
  • Oily skin (seborrhea oleosa)
  • Crusted skin
  • Itching
  • Musky odor
  • Chronic or recurrent ear infection (otitis externa)

Types

A malassezia infection can take several forms.

  • Localized – small patches of infected areas
  • Generalized – infection that covers the entire body
  • Otitis – ear infection, usually otitis externa, but occasionally otitis media (middle ear infection) in very severe cases

Causes of Fungal Infection (Malassezia pachydermatis) of the Skin in Dogs

Fungal skin infections are frequently associated with excess oil in the skin as well as a weakened immune system. These conditions can put your dog at risk.

  • Allergies
  • Seborrhea oleosa from another condition
  • Weakened immune system
  • Endocrine disease (Cushing’s disease or hypothyroidism)
  • Immunosuppressive drugs
  • Pyoderma infection of staphylococcus bacteria
  • Breeds that tend to be predisposed are West Highland White Terrier, Basset Hound, Cocker Spaniel, Springer Spaniel, Silky Terrier, Australian Terrier, Maltese Terrier, Chihuahua, Poodle, Shetland Sheepdog, Lhasa Apso, Dachshund, Chinese Shar Pei

Diagnosis of Fungal Infection (Malassezia pachydermatis) of the Skin in Dogs

The veterinarian will examine your dog’s symptoms. The fungus is diagnosed by taking a sample from the skin and examining it under a microscope. A stain may be added to make the malassezia fungi more visible. Several fungi cells are normal, but high numbers suggest an infection. Some dogs respond more drastically to a lower concentration of fungi, so diagnosis will also be based on symptoms. The veterinarian will need to check for the presence of staphylococcus bacteria as well, since the two are frequently found together and can cause similar skin infections.

The veterinarian will also diagnose the underlying condition that is causing the fungus to proliferate. This could include testing for allergies, hormone imbalance, or other skin parasites such as scabies. Bloodwork and urine tests will be done to evaluate the overall state of your dog’s health. Other medications your dogs is taking, particularly immunosuppressant drugs, are also relevant.

Treatment of Fungal Infection (Malassezia pachydermatis) of the Skin in Dogs

Treatment will depend on the severity of the condition. Shampoos containing selenium sulfide or benzoyl peroxide will help to remove excess oil from the skin and treat generalized infection in cases that are mild. Antifungal creams containing miconazole, ketoconazole, or clotrimazole can be applied locally. Dogs with otitis externa will need their ears cleaned, preferably with an antifungal cleaner, and antifungal drops or cream will need to be applied in the ear also. Any topical treatment will need to be repeated several times a week for at least two weeks and possibly as long as three months.

Cases that are more severe will require oral antifungal treatment as well. Daily medication containing ketoconazole, itraconazole, or fluconazole will be prescribed for 2-3 weeks. You will need to return for a check-up so the veterinarian can retest your dog to see if the medication is working. Topical treatment will be necessary at the same time. Oral antifungal medications can cause side-effects, so these drugs will only be prescribed for severe symptoms, or cases that do not respond to topical treatment. The oral dose will be discontinued as soon as possible.

Other treatments will focus on the cause of the problem. Dogs with allergies may be put on a special diet. Endocrine imbalance will be treated with medication. Antibiotics may be given for simultaneous staph infection. If scabies are present, medication will be given to kill this parasite.

Recovery of Fungal Infection (Malassezia pachydermatis) of the Skin in Dogs

The chances of your dog making a full recovery from yeast dermatitis is good. Most infections clear up with antifungal treatment. Recurrence will depend on identifying and treating the underlying cause that has weakened your dog’s health. Long term medication could be needed to rectify an endocrine imbalance, but most bacteria and parasite infections will clear up with treatment. Life-long diet modification might be necessary to reduce allergic reactions.

If your dog has an unidentifiable allergy, or is very sensitive to the presence of a few malassezia fungi, continuous topical treatment might be necessary to manage the problem. This could also be true for dogs with a suppressed immune system from chemotherapy, or from treatment for an autoimmune disorder. Regular bathing with an antifungal shampoo and frequent application of creams or ear-drops can usually keep symptoms under control. Very severe cases might need oral medication administered intermittently.

Fungal Infection (Malassezia pachydermatis) of the Skin Questions and Advice from Veterinary Professionals

Murphy
Labrador
5 Years
Critical condition
0 found helpful
Critical condition

Has Symptoms

red skin, Loss of weight, Vomiting

My 5 year old Labrador is suffering from skin disease almost since birth, tried ketazole shampoo, vinegar baths, now she was on gudcef 100 antibiotic tablets for past 6 months, but no improvement. she has totally lost weight and has a little fur left only on head and back, she keeps puking if she eats anything, i have lost complete hope can you help

Dr. Michele King, DVM
Dr. Michele King, DVM
1079 Recommendations
Some dogs have underlying health conditions that predispose them to skin diseases. Fungal infections of the skin are usually secondary to another problem, such as allergies, or a low thyroid. If Murphy has not had blood testing done to assess her thyroid, that would be a good idea. I hope that things improve for her.

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Marley
Labrador Retriever
8 Months
Serious condition
0 found helpful
Serious condition

Marley is a 8 month old lab.. He seems to have skin issues since I got him. But don't know exactly what is wrong.. recently he got extreme hair fall. I doubt whether it's yeast infection or ringworm. How do I differ both.

Dr. Callum Turner, DVM
Dr. Callum Turner, DVM
2499 Recommendations
There are various causes for hair loss which include infection (bacterial, parasitic, fungal), hormonal issues (Cushing’s Disease among others), physical trauma from over itching, contact dermatitis, food and environmental allergies as well as other causes; you should visit your Veterinarian for an examination and a skin scraping to check for parasites as well as Marley’s general health. Regards Dr Callum Turner DVM

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Coco
Maltese mix with Yorkie
7
Critical condition
0 found helpful
Critical condition

Has Symptoms

Itching and Licking

My 7 yr old Maltese has been on Simplicef for the last 2 months due to a staph skin infection. She suffers from yeast infections as well and the itching is unbearable. Have tried Apoquel and Atopica with very little relief. Have tried every food available for allergies to no avail. Has had both ear drums removed due to multiple ear infections and hematoma in both ears.

Can she be on both Simplicef (for the open sores and wounds scratched raw) and Itraconazole (recommended treatment for Malassezia Pachydermatis) at the same time?

Thank you for your input,
Susan

Dr. Callum Turner, DVM
Dr. Callum Turner, DVM
2499 Recommendations

I cannot give the recommendation for using a prescription medication with another, you should consult your prescribing Veterinarian before giving anything to Coco; a simple phone call is enough as they have already examined Coco and will have her on file. I haven’t examined Coco and cannot legally approve the use of prescription medicines without first performing a physical examination; plus Coco would be under her Veterinarian’s duty of care. Regards Dr Callum Turner DVM

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