Tularemia in Rabbits: Serious Bacterial Infection and Human Health Risk

Tularemia is a serious bacterial infection caused by Francisella tularensis. It is often called "rabbit fever" because wild rabbits and hares are well-known hosts, but the disease can affect many animal species and people too. In rabbits, the illness may cause sudden severe infection, blood poisoning, swollen lymph nodes, liver and spleen changes, pneumonia, or sudden death.

This is not a routine pet rabbit illness, but it is important because it is both life-threatening and zoonotic. That means a sick rabbit may pose a human health risk, especially if someone handles body fluids, tissues, or a carcass without protection. Pet parents should avoid direct contact with suspicious wounds, discharge, or deceased wildlife and should call your vet promptly if exposure is possible.

Some rabbits become critically ill very quickly, while others may show vague signs at first, such as lethargy, poor appetite, or fever. Because the signs can overlap with other rabbit emergencies, tularemia cannot be confirmed at home. Your vet will need to assess the rabbit and decide which tests and safety precautions make sense.

Tularemia is caused by infection with Francisella tularensis, a highly infectious bacterium found in wildlife and certain outdoor environments. Wild rabbits, hares, and rodents are important reservoirs. Rabbits may become infected after a bite from an infected tick or deer fly, through contact with infected animal tissues, or by exposure to contaminated food, water, soil, or bedding.

Outdoor rabbits and rabbits with access to yards, brushy areas, or places visited by wildlife may have higher exposure risk. Hunting dogs, cats that bring home prey, and pet parents who handle wild rabbits or carcasses can also bring contaminated material into the environment. Even though pet rabbit cases are not common, the disease deserves caution because only a small number of bacteria may be enough to cause infection.

Human infection is also possible. People can become infected by handling sick or dead animals, getting contaminated material into the eyes or broken skin, inhaling contaminated particles, or being bitten by infected ticks or deer flies. If tularemia is suspected in your rabbit, use gloves, keep children and immunocompromised family members away, and ask your vet what cleaning and handling steps are safest.

Diagnosis starts with history and exam findings. Your vet will ask about outdoor access, tick exposure, contact with wildlife, recent sudden illness, and whether anyone in the household handled a dead rabbit or other wild animal. Because tularemia can mimic sepsis, pneumonia, abscess disease, or other infectious problems, your vet may first focus on stabilizing your rabbit.

Testing may include a complete blood count, chemistry panel, and imaging such as radiographs if breathing problems or internal disease are suspected. Confirmatory testing can involve PCR, bacterial culture, or serology, depending on the sample available and the stage of disease. In some cases, tissue samples from enlarged lymph nodes or affected organs may be needed.

Tularemia testing requires extra caution. Your vet may alert the diagnostic laboratory before samples are submitted because F. tularensis can pose a risk to laboratory staff. Serology can help, but antibodies may not be detectable early in the course of infection, so a negative early test does not always rule it out. That is one reason your vet may recommend treatment and isolation steps before every result is back.

Prevention focuses on reducing exposure to infected wildlife, biting insects, and contaminated outdoor environments. Keep pet rabbits indoors or in secure housing that limits contact with wild rabbits, rodents, and predators. Check outdoor areas for ticks, remove brush and standing debris where possible, and ask your vet which parasite-prevention strategies are appropriate for your rabbit and household.

Do not let your rabbit investigate or share space with dead wildlife. Wear gloves if you must move a carcass, and wash hands well afterward. Keep hay, pellets, and bedding stored in ways that reduce contamination from wild animals and insects. Fresh water should come from a clean source, not outdoor puddles or containers accessible to wildlife.

If your rabbit spends time outside, inspect the body and ears for ticks after each outing and contact your vet if you find one. Also be cautious if dogs or cats in the home hunt or bring in prey. Tularemia is uncommon, but because it can be severe and can infect people, prevention is really about thoughtful exposure control and early action when something seems off.