What is the likelihood of contracting rabies after being scratched by a cat that causes bleeding?

Mar 01, 2021 Source: Cainiu Health
Dr. Wang Jihong
Introduction
What is the likelihood of contracting rabies after being scratched by a cat and bleeding? The risk of developing rabies following a cat scratch is relatively low, as dogs are the primary reservoir for rabies virus, with cats being the second most common source. Following a bite from a rabid dog, the probability of human rabies infection is approximately 15%–30%; the risk following a scratch from a rabid cat is lower than that associated with dog bites.

Rabies is a contagious disease transmitted to healthy individuals through scratches or bites from dogs or cats. After being scratched or bitten, the rabies virus can directly invade the body and subsequently cause illness.

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What is the likelihood of contracting rabies after being scratched by a cat that draws blood?

The risk of contracting rabies after being scratched by a cat is relatively low. This is because dogs are the primary reservoir for rabies virus, followed by cats. If a person is bitten by a rabid dog, the probability of developing rabies is approximately 15–30%; the risk following a scratch from a rabid cat is lower than that from a dog bite. After being scratched by a cat, prompt wound management is essential: thoroughly rinse the wound with soap and running water, then disinfect it with hydrogen peroxide and iodine tincture (or povidone-iodine). If the cat’s health status cannot be confirmed, vaccination with rabies vaccine—and possibly rabies immunoglobulin—should be considered, especially if the scratch causes bleeding. Additionally, deep wounds require professional medical evaluation and treatment at a hospital to prevent tetanus infection. Rabies vaccination is unnecessary only if one can confidently confirm the cat’s complete health—for instance, if the cat has received a documented rabies vaccination, or has lived exclusively indoors since birth and never had contact with other animals outdoors. In all other cases, vaccination decisions should be made based on individual risk assessment.

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Knowledge Extension: How is the rabies vaccine administered?

1. A standard rabies vaccination course consists of five doses, administered intramuscularly on Days 0, 3, 7, 14, and 30. “Day 0” refers to the day of the first vaccination; subsequent doses follow accordingly.

2. Rabies vaccination should be initiated as soon as possible—ideally within 24 hours of exposure. Earlier administration yields better protection; however, vaccination remains effective even if initiated beyond 24 hours. The vaccine is typically administered via intramuscular injection in the upper arm.

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The above outlines the likelihood of contracting rabies after being scratched by a cat that draws blood. We hope this information is helpful to you.