Bordetella in Guinea Pigs: Symptoms, Contagion & Treatment
- See your vet immediately if your guinea pig has labored breathing, stops eating, seems weak, or has nasal or eye discharge.
- Bordetella bronchiseptica is a highly contagious bacterial respiratory infection in guinea pigs and can progress to pneumonia or sudden death.
- Rabbits can carry Bordetella without looking sick, so rabbits and guinea pigs should not be housed together.
- Your vet may recommend antibiotics that are considered safer for guinea pigs, plus supportive care such as fluids, oxygen, syringe feeding, and vitamin C support when needed.
- Typical US cost range for diagnosis and treatment is about $150-$900+, depending on severity, imaging, hospitalization, and whether oxygen or intensive care is needed.
What Is Bordetella in Guinea Pigs?
Bordetella in guinea pigs usually refers to infection with Bordetella bronchiseptica, a bacteria that targets the respiratory tract. In guinea pigs, it can cause sneezing, nasal and eye discharge, breathing trouble, conjunctivitis, ear disease, and pneumonia. Some guinea pigs may carry the bacteria without obvious signs, while others become critically ill very quickly.
This infection matters because guinea pigs are especially vulnerable to respiratory disease. Merck notes that B. bronchiseptica is an aggressive pathogen in guinea pigs and may cause pneumonia, conjunctivitis, otitis media, abortions, and stillbirths. In group settings, outbreaks can spread fast, and some affected guinea pigs may decline before treatment has much time to work.
For pet parents, the biggest takeaway is urgency. Guinea pigs often hide illness until they are quite sick. If your guinea pig is quieter than usual, eating less, losing weight, or breathing harder, that is not a wait-and-see situation. Early veterinary care gives your vet more treatment options and may improve the outlook.
Symptoms of Bordetella in Guinea Pigs
- Sneezing
- Nasal discharge
- Eye discharge or red, inflamed eyes
- Labored or fast breathing
- Loss of appetite or not eating hay/pellets
- Weight loss
- Lethargy, dullness, or hiding
- Coughing or wheezy breathing
- Sudden death
Mild sneezing by itself may not always mean Bordetella, but respiratory signs in guinea pigs should never be brushed off. When discharge, appetite changes, weight loss, or noisy breathing appear together, your vet should see your guinea pig as soon as possible.
See your vet immediately if your guinea pig is breathing with effort, sitting puffed up, refusing food, acting weak, or losing weight. Guinea pigs can move from "a little off" to critically ill in a short time, especially if pneumonia develops.
What Causes Bordetella in Guinea Pigs?
Bordetella is caused by infection with the bacteria Bordetella bronchiseptica. It usually spreads through respiratory droplets from sneezing or coughing, and close contact makes transmission easier. PetMD also notes a genital form of infection, so sexual contact can be another route in breeding animals.
Some guinea pigs may carry the bacteria without obvious illness, which makes outbreaks harder to predict. Stress, crowding, poor ventilation, sudden temperature changes, pregnancy, young age, older age, and other illnesses may make a guinea pig more likely to become sick once exposed.
One especially important risk factor is contact with rabbits. Merck states that rabbits may harbor B. bronchiseptica in their respiratory tracts without developing disease, but the same organism can be much more dangerous in guinea pigs. Because of that, rabbits and guinea pigs should not live together or share airspace, supplies, or handling routines without careful hygiene.
How Is Bordetella in Guinea Pigs Diagnosed?
Your vet will start with a physical exam and a careful history. That usually includes questions about new guinea pigs in the home, exposure to rabbits or other small mammals, recent breeding, appetite changes, weight loss, and how long the breathing signs have been present.
Diagnosis often involves more than listening to the chest. Depending on how sick your guinea pig is, your vet may recommend bloodwork, swabs or samples from nasal or eye discharge for culture or other testing, and chest imaging such as radiographs to look for pneumonia, fluid, or changes in the lungs. Imaging can also help your vet judge how aggressive treatment needs to be.
Because several infections can look similar in guinea pigs, your vet may also consider other causes of respiratory disease, including Streptococcus pneumoniae, Streptococcus zooepidemicus, and viral disease. Confirming the likely cause helps your vet choose the safest and most appropriate treatment plan for your individual pet.
Treatment Options for Bordetella in Guinea Pigs
Spectrum of Care means you have options. Here are treatment tiers at different price points.
Budget-Conscious Care
- Exotic or small mammal exam
- Weight check and respiratory assessment
- Safer oral antibiotic selected by your vet when appropriate
- Home nursing plan with cage rest, warmth, hydration support, and close appetite monitoring
- Isolation from other guinea pigs and strict cleaning guidance
Recommended Standard Treatment
- Exam with same-day reassessment of hydration and body weight
- Chest radiographs to check for pneumonia or lung changes
- Targeted antibiotic plan using medications considered safer for guinea pigs
- Supportive care such as subcutaneous fluids, syringe feeding guidance, probiotic discussion, and vitamin C support when indicated
- Follow-up visit in 3-7 days or sooner if signs worsen
Advanced / Critical Care
- Emergency exam and hospitalization
- Oxygen therapy or oxygen cage support
- Injectable medications and fluid therapy
- Advanced imaging, repeat radiographs, and laboratory testing such as culture or bloodwork
- Assisted feeding, temperature support, and intensive monitoring for pneumonia, dehydration, or sepsis
Cost estimates as of 2026-03. Actual costs vary by location, clinic, and individual case.
Questions to Ask Your Vet About Bordetella in Guinea Pigs
Bring these questions to your vet appointment to get the most out of your visit.
- Does my guinea pig likely have an upper respiratory infection, pneumonia, or another condition that looks similar?
- Which antibiotics are considered safest for guinea pigs in this situation, and what side effects should I watch for at home?
- Does my guinea pig need chest radiographs or other testing today, or can we start with a more conservative plan?
- What signs mean I should bring my guinea pig back the same day or go to an emergency clinic?
- Should I separate my other guinea pigs, and for how long?
- Could exposure to rabbits or other pets in my home be part of the problem?
- How should I support eating and hydration safely while my guinea pig recovers?
- What follow-up timeline do you recommend to make sure the lungs are improving?
How to Prevent Bordetella in Guinea Pigs
Prevention starts with reducing exposure. Do not house guinea pigs with rabbits, and avoid shared cages, play areas, bedding tools, food bowls, or close-contact handling between species. If you have multiple guinea pigs, quarantine new arrivals before introducing them, and keep any pig with sneezing, discharge, or appetite changes away from the group until your vet advises otherwise.
Good husbandry also matters. Keep the enclosure clean and dry, remove soiled bedding promptly, and make sure ventilation is good without chilling drafts. Stress can make respiratory disease more likely, so aim for a stable environment with consistent temperature, quality hay, balanced nutrition, and enough space.
Because some animals may carry Bordetella without obvious signs, prevention is not perfect. That is why early recognition is so important. Weigh your guinea pig regularly, watch for subtle appetite changes, and contact your vet promptly if you notice sneezing, discharge, or quieter-than-normal behavior.