Cat Bite Injuries to Humans

By Krista Williams, BSc, DVM; Ernest Ward, DVM

Infectious Diseases, Zoonosis & Human Health, Pet Services

Why do cat bites get infected so easily?


These punctures rapidly seal over, trapping bacteria from the cat's mouth under the skin of the bite victim, where they can easily multiply. A similar type of injury happens with cat scratches: the extremely sharp, curved nails penetrate deep into the skin, essentially injecting bacteria deep into the puncture wound. Depending on the location and depth of the wound, the bacteria can spread in the surrounding tissues causing a condition called cellulitis.

Are cat bites dangerous?

wounds_-_cat_bite_injuries_to_humansCat bites can be dangerous both to other animals and to humans. In their mouths, all cats carry a large number of bacteria that are capable of causing tissue infections in bite wounds. One of the more common is highly pathogenic bacteria known as Pasteurella multocida. An infected cat bite wound will be red, swollen, and painful, and the infection can spread through the surrounding tissues, causing a condition called cellulitis, or through the blood to other areas of the body, causing a condition called septicemia (often called blood poisoning).

Infected people may suffer from fever and flu-like symptoms and, rarely, may die if proper medical treatment is not sought. Children, the elderly, ill, and immunosuppressed individuals are particularly vulnerable to developing severe infections if bitten by a cat.

What immediate action should I take if bitten by a cat?

The wound should immediately be washed under running water. Avoid scrubbing the wounds vigorously, or using strong disinfectants or other chemicals, since this may harm tissue and delay wound healing. You may clean the wound with a mild salt solution, made by mixing 1 teaspoon (5 ml) of table salt in 2 cups (500 ml) of water. Control bleeding by applying direct pressure to the wound using an absorbent dressing or bandage.


Do I really need to see a doctor?

Yes. It is advisable to see a physician as soon as possible in order to have the injury properly treated. Your doctor will likely prescribe antibiotics in order to reduce the risk of infection developing at the site of the bite or elsewhere in the body. Some wounds may need to be sutured (stitched) while others will be left open to heal. A tetanus booster may also be recommended.


What will happen to the cat in this case?



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