Rabies in Cats

Rabies is caused by a group of viruses called lyssaviruses, capable of infecting essentially any warm-blooded animal, including humans, which is part of why rabies is one of the most widely recognized viral diseases in the world. It causes inflammation of the brain, and worldwide, it remains a serious public health threat: the World Health Organization estimates roughly one person dies from rabies every 9-10 minutes globally, largely in regions without reliable access to vaccination.

The time between exposure and the first symptoms usually falls between 1 and 3 months, though it can range from under a week to over a year, depending on how far the virus needs to travel through the body to reach the central nervous system.

Rabies spreads almost exclusively through a bite from an infected animal. Rarely, it can also spread through scratches or via infected saliva contacting mucous membranes. Among wildlife, foxes, coyotes, skunks, raccoons, and bats are the most common carriers, and notably, cats have been the most frequently reported rabid domestic animal in the United States every year since 1992, more so than dogs. This is largely tied to lower vaccination rates in cats and their tendency to roam and encounter wildlife.

The virus doesn't survive long outside a host - it remains viable for less than 24 hours in the body of a deceased infected animal. While an infected animal's saliva carries high concentrations of the virus, a bite doesn't guarantee infection in the bitten animal or person.

After infection, a cat may go through several distinct stages. Initial signs often include itchiness at the bite site and fever, as the virus travels slowly along peripheral nerves toward the brain. In cats, the average time from exposure to brain involvement is somewhat shorter than in dogs, typically 2 to 6 weeks. Once the virus reaches the brain, it spreads to the salivary glands, where it becomes transmissible through a bite.

• Prodromal phase

  In cats, this phase is generally shorter than in dogs, lasting only 1 to 2 days. Cats tend to show more pronounced fever spikes and more noticeable behavioral changes during this stage than dogs do.

• Furious phase

  Cats are particularly prone to developing this phase. Affected cats become restless, irritable, and hyper-reactive to sound and visual stimuli, growing progressively more agitated and potentially aggressive as the disease advances. Disorientation and seizures follow, ultimately leading to death.

• Paralytic phase

  Some cats develop this third phase, either after the prodromal or furious stage, typically within 2 to 4 days of the first symptoms. Paralysis develops as the virus affects motor neurons, usually starting with the nerves controlling the head and throat. Affected cats may lose the ability to swallow, leading to drooling. As paralysis spreads to the diaphragm and face, breathing becomes labored, the jaw may hang open, and a choking sound is sometimes produced. Progressive loss of muscle control ultimately leads to respiratory failure.

Currently, rabies can only be confirmed through microscopic examination of brain tissue, meaning definitive diagnosis happens after death. Newer testing methods using skin or blood samples are in development for live animals, but aren't yet in routine clinical use.

If your cat is bitten or scratched by wildlife that isn't available for testing (including bats), treat it as a probable rabies exposure.

• If your cat is unvaccinated

  Current CDC and NASPHV guidance recommends euthanasia as the safest course of action, since no licensed treatment can guarantee an unvaccinated exposed cat won't develop rabies. If the owner declines euthanasia, the recommended protocol is immediate vaccination followed by strict quarantine for 4 months. Individual states can have their own legal requirements that may differ, so confirming your local jurisdiction's specific rule is worthwhile.

• If your cat is currently vaccinated

  The standard protocol is a booster vaccination as soon as possible, followed by a 45-day observation period at home under your control, rather than strict isolation.

If a cat bites a person and rabies is a concern, standard protocol is a 10-day observation period to watch for signs of illness, rather than immediate euthanasia. Specific requirements can vary based on the cat's vaccination status and local regulations.

People bitten by a potentially rabid animal are typically given a series of post-exposure vaccinations along with a rabies immunoglobulin injection. If you're bitten by any animal that might carry rabies, wash the wound thoroughly with soap and water for a full 15 minutes, then seek medical attention immediately.

Vaccination is the only reliable way to prevent rabies. This matters especially for cats: fewer than 10% of pet cats in the U.S. are estimated to be vaccinated against rabies, a major factor behind why cats consistently outnumber dogs in reported domestic rabies cases each year. Some communities legally require cat vaccination for exactly this reason - even indoor-only cats can be exposed if a bat or other wild animal gets into the home.

The standard vaccination protocol is a first dose at 3 to 4 months of age, a follow-up dose one year later, and then a 3-year vaccine after that, which has proven highly effective long-term. Your veterinarian can tailor recommendations to your cat's specific situation and local requirements.