Pyoderma in Cats (Bacterial Skin Infection, Pus in the Skin)

Pyoderma in Cats (Bacterial Skin Infection, Pus in the Skin)

By: Dr. Mark Thompson

Section: Overview

Pyoderma is a bacterial infection of the skin. Pyoderma can be divided into surface pyodermas (infection on the skin surface), superficial pyoderma (infection within the skin) or deep pyoderma (infection under the skin).

The health impact from pyoderma can range from mild with superficial pyoderma to severe with deep pyoderma. Superficial and surface pyodermas can cause intense itching leading to discomfort. The underlying cause of the pyoderma may also have a negative health impact on the cat, depending on the disease.

What to Watch For

Any of these should trigger a visit to your veterinarian:

  • Red, itchy and painful skin lesions
  • Pustules (pimples)
  • Draining sores

    Diagnosis

    Diagnostic tests may include:

  • A detailed medical history. Expect to be asked about how long the lesions have been present, what they looked like initially, and whether itching preceded the lesions or appeared after the lesions.


  • A complete exam of all body systems with particular attention paid to the type and location of lesions present in the skin.

  • Cytology. A pustule may be opened and the contents examined under a microscope. With a pyoderma, bacteria and neutrophils (a type of white blood cell) are usually seen. Neutrophils without bacteria may suggest another disease.

  • Culture. Deep pyodermas are typically cultured to identify the exact bacteria that are present and to help select the best medication. Superficial pyoderma lesions are rarely cultured since they almost always grow the same bacteria (Staphylococcus intermedius).

  • Other tests, such as skin scrapes, allergy tests, complete blood count or blood chemistry analysis, to determine the underlying cause of the pyoderma, especially if the pyoderma recurs after treatment.

    Treatment

    Treatment may include:

  • Antibiotics to help kill the bacteria infection

  • Antibacterial shampoos and creams containing benzoyl peroxide, ethyl alcohol or chlorhexidine

  • Treatment to prevent underlying itchy skin diseases or diseases that suppress the immune system for long-term success

    Home Care and Prevention

    Give all medications as instructed. Even if lesions clear up early, antibiotics should be given until all medications are finished. Observe your cat for draining lesions.

    Some causes of pyoderma are not preventable, but the presence of fleas can worsen pyoderma. The best prevention is to follow a complete flea control program as recommended by your veterinarian. In addition, keep your cat clean and brushed free of mats.

     
    Printable Version
     
    Have a Pet Question?
    Send Your Pet Question to Dr. Jon
    and His Staff of Veterinarians Ask Dr. Jon
    Dr. Jon's Newsletter
    Yes! Send Me the Latest Health Information, Pet Tips, Pet Stories and more...
     
     

    Related Articles

    • 1 Miliary Dermatitis

      Miliary dermatitis is a papular, crusting skin disease accompanied by varying degrees of pruritis. Cats with miliary dermatitis have multiple, small bumps on their skin that are usually associated with...

      Read MoreRead More
    • 2 Flea Allergy Dermatitis in Cats

      Flea allergy dermatitis is the most common allergy in cats and is caused by flea bites, specifically the saliva of the flea. It is a very itchy disease and predisposes to the development of secondary skin...

      Read MoreRead More
    • 3 Pruritus (Itchiness) in Cats

      How pruritus affects your dog’s health depends on the degree of the pruritus. Severe pruritus leads to intense scratching, which may result in painful skin lesions that may become infected.

      Read MoreRead More
    • 4 Acute Moist Dermatitis

      A hot spot starts because something irritates the skin, and the body either itches or becomes inflamed. The itching then causes the dog to lick or chew the area, which further damages the skin, creating...

      Read MoreRead More
    • 5 Atopy in Cats

      Atopy is a pruritic (itchy) skin disease of animals that is caused by an allergy to substances in the environment. It can be difficult to diagnose in cats and, therefore, is probably under-diagnosed.

      Read MoreRead More
    • 6 Skin Lesion or Sore in Cats

      There are many different types of skin lesions that can occur in the skin of cats, and each lesion or combination of lesions can be caused by multiple diseases and conditions.

      Read MoreRead More
  • Related Articles
    • 1 Acute Moist Dermatitis

      A hot spot starts because something irritates the skin, and the body either itches or becomes inflamed. The itching then causes the dog to lick or chew the area, which further damages the skin, creating...

      Read MoreRead More
    • 2 Atopy in Cats

      Atopy is a pruritic (itchy) skin disease of animals that is caused by an allergy to substances in the environment. It can be difficult to diagnose in cats and, therefore, is probably under-diagnosed.

      Read MoreRead More
    • 3 Miliary Dermatitis

      Miliary dermatitis is a papular, crusting skin disease accompanied by varying degrees of pruritis. Cats with miliary dermatitis have multiple, small bumps on their skin that are usually associated with...

      Read MoreRead More
    • 4 Flea Allergy Dermatitis in Cats

      Flea allergy dermatitis is the most common allergy in cats and is caused by flea bites, specifically the saliva of the flea. It is a very itchy disease and predisposes to the development of secondary skin...

      Read MoreRead More
    • 5 Pruritus (Itchiness) in Cats

      How pruritus affects your dog’s health depends on the degree of the pruritus. Severe pruritus leads to intense scratching, which may result in painful skin lesions that may become infected.

      Read MoreRead More
    • 6 Skin Lesion or Sore in Cats

      There are many different types of skin lesions that can occur in the skin of cats, and each lesion or combination of lesions can be caused by multiple diseases and conditions.

      Read MoreRead More
     

    Over 10,000 Veterinarian Approved Articles

    Related Articles
    • 1 Acute Moist Dermatitis

      A hot spot starts because something irritates the skin, and the body either itches or becomes inflamed. The itching then causes the dog to lick or chew the area, which further damages the skin, creating...

      Read MoreRead More
    • 2 Atopy in Cats

      Atopy is a pruritic (itchy) skin disease of animals that is caused by an allergy to substances in the environment. It can be difficult to diagnose in cats and, therefore, is probably under-diagnosed.

      Read MoreRead More
    • 3 Miliary Dermatitis

      Miliary dermatitis is a papular, crusting skin disease accompanied by varying degrees of pruritis. Cats with miliary dermatitis have multiple, small bumps on their skin that are usually associated with...

      Read MoreRead More
    • 4 Flea Allergy Dermatitis in Cats

      Flea allergy dermatitis is the most common allergy in cats and is caused by flea bites, specifically the saliva of the flea. It is a very itchy disease and predisposes to the development of secondary skin...

      Read MoreRead More
    • 5 Pruritus (Itchiness) in Cats

      How pruritus affects your dog’s health depends on the degree of the pruritus. Severe pruritus leads to intense scratching, which may result in painful skin lesions that may become infected.

      Read MoreRead More
    • 6 Skin Lesion or Sore in Cats

      There are many different types of skin lesions that can occur in the skin of cats, and each lesion or combination of lesions can be caused by multiple diseases and conditions.

      Read MoreRead More
    Advertisement
    Advertisement