Cat Scratching Behind Ear

While you may not be familiar with
Bartonella, you’ve probably heard of
cat scratch disease, a human condition caused by one form of this bacteria. As the name suggests, people can get this disease from the scratch or bite of an infected cat. But
dogs and cats can get sick from these bacteria as well, often from exposure to infected
fleas and possibly ticks.

A Risk to Your Family’s Health

Although many animals can carry different forms of the bacteria, including dogs, wild canines, cattle and pocket pets, cats appear to be the main source for human infections with
Bartonella henselae, the cause of
cat scratch disease (or cat scratch fever).

While people usually become infected from the bite or scratch of an infected
cat, they may also become infected when the cat licks an open wound. Symptoms in humans may include a fever and enlarged lymph nodes, but young children or immunocompromised people may experience more severe complications.

How Pets Become Infected

Exposure to infected flea dirt, or droppings, from the cat flea (
Ctenocephalides felis) is believed to be the main way cats are infected with 
Bartonella, but ticks and biting flies may also transmit the bacteria. Cats do not appear to become infected through cat bites, scratches, grooming, sharing litter boxes or food dishes. Dogs may acquire
Bartonella though contact with fleas or possibly ticks or a cat bite or scratch.

The bacteria survive by living in red blood cells and the cells lining internal organs. In this way, the bacteria can hide from the body’s natural immune system and antibiotics directed against them. The bacteria can also infect other types of cells, such as those in the central nervous system and bone marrow as well as in certain types of white blood cells.

Most Cats Show No Signs of Illness

The signs of infection can vary depending on the different species of bacteria. While most
cats show no signs of infection, some may have a transient
fever, lethargy and decreased appetite. If a cat is positive for
feline immunodeficiency virus (FIV) and is also infected with
Bartonella, he may experience inflamed gums and enlarged lymph nodes.

Clinical signs associated with
bartonellosis in dogs can include fever,
weight loss,
decreased appetite, lethargy,
coughing, intermittent joint pain and lameness,
weakness, skin lesions, enlarged lymph nodes and potentially jaundice (yellowing of the skin).

Diagnosis Can Be Difficult

Infected cats may show transient signs or no signs at all, and routine
blood work may not reveal any hints to the infection. But when
dogs or cats become ill, your veterinarian may recommend special blood tests for
Bartonella. Pets that test positive for the infection are generally treated with a four- to six-week course of antibiotics.

Flea and Tick Prevention is a Must

Minimizing your pet’s exposure to fleas and ticks is the most important means of reducing transmission of
Bartonella as well as other disease-causing organisms carried by these pests. Your veterinarian can recommend an effective product that’s right for your cat or dog.


More on VetStreet:

  • Signs Your Pet Is Hiding Illness
  • Tactics to Keep Pets Flea and Tick Free
  • Tips to Avoid Trading Diseases with Your Pet
  • 7 Most Common Cat Grooming Questions
  • Is My Pet Drinking Enough Water?

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