# Is Salmonella in Cats Contagious? Risks to Pets and People Is salmonella in cats contagious? Yes. Cats can pass Salmonella bacteria to people and to other animals in the home, and the reverse is also true, so an infected cat can pick it up from you or from shared food and water. The risk is highest in households with young children, older adults, pregnant women, and anyone with a weakened immune system. This article is educational and is not a substitute for veterinary diagnosis or treatment. ## Quick Answer - Salmonella in cats is contagious to humans and other pets, mainly through contact with infected feces, saliva, or contaminated food and water [1][2]. - Many infected cats show no signs at all and still shed the bacteria, so a healthy-looking cat can be a source of infection [3]. - Outdoor cats that hunt birds or rodents face a much higher risk, and outdoor-owned cats are 3 to 5 times more likely to carry zoonotic pathogens than indoor-only cats [4]. - Most otherwise healthy adult cats recover with supportive care, and antibiotics are usually reserved for severe cases or cats that could infect people [1]. - Hand washing after litter box duty, scooping daily, and keeping raw meat away from your cat are the simplest ways to lower risk. ## What Is Salmonella in Cats? Salmonella is a group of bacteria that live in the intestines of many animals, including cats, birds, reptiles, and people. When these bacteria cause illness, the condition is called salmonellosis. Salmonella is a Gram-negative enteric bacterium and a leading cause of foodborne and waterborne disease worldwide [2]. In cats, the infection often targets the lower small intestine and the junction where the small and large intestines meet, called the ileocecocolic junction [5]. Some cats get mild stomach upset. Others get severe diarrhea, and a few become very sick. Many cats carry the bacteria without any signs at all, which is part of why the infection spreads so easily in multi-pet homes. ## Signs of Salmonella Infection in Cats The signs owners notice most often include: - Diarrhea, sometimes with blood or mucus - Vomiting - Loss of appetite - Lethargy or weakness - Fever - Weight loss over days to weeks - Dehydration, seen as dry gums or skin that stays tented when gently pinched Some cats have only soft stool for a day or two. Others develop persistent diarrhea that does not improve on its own. Young kittens, senior cats, and cats with other illnesses tend to get sicker. Because the signs overlap with many other gut problems, you cannot tell salmonella from other causes just by looking at your cat. ## How Cats Get Salmonella ### Salmonella spp in Cats: Common Routes Cats usually pick up Salmonella by eating or licking something contaminated. The most common routes include: - Raw or undercooked meat, poultry, eggs, and unpasteurized dairy [1] - Contact with the feces of an infected animal [1] - Contaminated water, including outdoor puddles and bird baths [1] - Hunting or eating wild birds and rodents [6] - Living with an infected pet or person in the same home [2] A household outbreak in Italy linked a human infant, a dog, a cat, and ten birds to the same Salmonella strain, and genetic testing confirmed the human and animal isolates were closely related [2]. That is a clear example of how the bacteria move between species under one roof. ### Salmonella Bacteria in Cats: Who Is Most at Risk Not every cat exposed to Salmonella gets sick. Risk factors that raise the odds include: - Unsupervised outdoor access, which increases exposure to wildlife, contaminated soil, and water [4] - A raw food diet or frequent table scraps of raw meat [1] - Living in a home with many animals [2] - Being very young, very old, or already ill - Recent antibiotic use or immune-suppressing medication Outdoor-owned cats were 3 to 5 times more likely to carry zoonotic pathogens than indoor-only cats in a global review of more than 174,000 cats [4]. If your cat roams, assume some level of exposure is possible. ## How Salmonella Spreads to People and Other Pets Salmonella spreads through the fecal-oral route. That means the bacteria leave an infected animal in stool and enter the next host through the mouth. In practice, this happens when: - You clean a litter box and then touch your face or food without washing your hands - An infected cat walks on kitchen counters after using the box - A cat's saliva or stool contaminates a shared water bowl or food dish - A person handles raw meat and then pets the cat People most at risk of serious illness include children under 5, adults over 65, pregnant women, and anyone with a weakened immune system. An outbreak in Norway found that 73% of human cases reported contact with cats or passerine birds before getting sick, and the outbreak strain was found in a cat from one affected household [6]. That does not prove the cat started the outbreak, but it shows how closely human and cat infections can be linked. If you are immunocompromised, you may also want to read about [Toxoplasma in Cats: Zoonotic Risk and Immunocompromised Owners](/knowledge/veterinary-medicine/parasite-control/toxoplasma-in-cats-zoonotic-risk-and-immunocompromised-owners), since several cat-borne infections deserve extra care in that group. ## How Veterinarians Diagnose Salmonella in Cats Diagnosis starts with a physical exam and a detailed history. Your vet will ask about diet, outdoor access, other pets, and any recent diarrhea in the household. The main test is a fecal culture or a stool PCR test, which looks for Salmonella DNA in the stool. Because shedding can come and go, a single negative test does not always rule out infection, and repeat testing may be needed. Blood work helps assess dehydration, organ function, and how sick the cat is. Abdominal ultrasound can be useful. In one study of 100 cats with gastrointestinal signs, 70 tested positive for Salmonella, and those cats showed a thickened ileum wall, focal hyperechoic mesenteric fat, and in 23% of cases a small amount of fluid near the ileocecocolic junction [5]. These findings support the diagnosis but do not replace stool testing. ## Treatment Options for Salmonella in Cats Treatment depends on how sick your cat is. ### Supportive Care Most cats with mild illness need fluids, a bland diet, and time. Your vet may give subcutaneous or intravenous fluids to correct dehydration. Anti-nausea medication and probiotics are sometimes used. Never give human anti-diarrheal drugs to a cat unless your vet prescribes them. ### Antibiotics Antibiotics are not automatic. Veterinarians usually reserve them for cats that are young, severely affected, or a potential source of human infection [1]. This is because antibiotic treatment is often not fully effective and some cats remain carriers after treatment [1]. When antibiotics are needed, your vet chooses the drug based on culture results and the cat's weight and health. The dose is calculated for your cat, so do not use leftover medication from another pet or a previous illness. ### Managing the Home If your cat tests positive, clean litter boxes daily, disinfect surfaces, and wash bedding in hot water. Keep the cat away from people who are immunocompromised until your vet clears the infection. If you feed raw meat, review the risks with your vet and consider [Is Raw Food Safe for Dogs and Cats?](/knowledge/veterinary-medicine/toxicology-and-food-safety/is-raw-food-safe-for-dogs-and-cats). | Situation | Typical Approach | |---|---| | Healthy adult cat, mild diarrhea | Fluids, bland diet, monitoring at home | | Kitten, senior, or very sick cat | Fluids, possible hospitalization, antibiotics based on testing | | Cat living with immunocompromised person | Antibiotics often considered, strict hygiene, repeat stool testing | | Multi-pet household with one positive cat | Separate food and water bowls, daily litter cleaning, test other pets if they show signs | ## Recovery, Outlook, and Long-Term Management Most cats with mild salmonellosis improve within a week or two with supportive care. Severe cases take longer and carry a higher risk, especially in kittens and cats with other health problems. Some cats keep shedding the bacteria after their signs resolve. This carrier state is why repeat stool testing matters, and why your vet may recommend testing before you consider the cat clear [1]. In the meantime, assume the cat can still pass the infection to others. Long-term management focuses on reducing exposure. Keep your cat indoors if possible. Avoid raw meat and unpasteurized dairy. Wash your hands after every litter box session. If your cat has ongoing gut issues, work with your vet on a long-term plan. ## Prevention Prevention comes down to hygiene and limiting exposure. - Scoop litter boxes daily and wash your hands afterward. - Keep food and water bowls clean and separate from human food prep areas. - Cook meat thoroughly and avoid feeding raw or undercooked animal products [1]. - Keep cats indoors or supervise outdoor time to reduce contact with birds and rodents [4]. - Wash hands after handling pets, especially before eating. - Isolate a sick cat from immunocompromised family members until your vet says it is safe. - Test new pets or pets with diarrhea before introducing them to a multi-pet home. If your cat has other recurring symptoms, such as sneezing or urinary changes, those usually have different causes. You can read about [Cat Sneezing a Lot: Allergies, Infection, or Something Else?](/knowledge/veterinary-medicine/vet-visit-decisions/cat-sneezing-a-lot) and [Cat Urinary Tract Infection Symptom](/knowledge/veterinary-medicine/symptom-guides/cat-urinary-tract-infection-symptom) for more context. ## Limitations and When to Contact a Veterinarian No article can tell you whether your specific cat has salmonella or how sick it will get. Individual cases need a veterinarian who can examine your cat, run tests, and tailor treatment. Contact your vet the same day if your cat has: - Diarrhea lasting more than 24 hours - Vomiting more than twice in a day - Blood or mucus in the stool - Refusing to eat or drink - Signs of dehydration Go to an emergency clinic now if your cat has: - Collapse or extreme weakness - Seizures or disorientation - Severe abdominal pain or a swollen, painful belly - Pale gums or rapid, labored breathing - Repeated vomiting with no ability to keep water down Call your vet for a routine visit if: - Your cat has soft stool on and off for more than a few days - You live with someone immunocompromised and your cat has diarrhea - Another pet or family member has confirmed salmonella - You feed a raw diet and want to review the risks ## Frequently Asked Questions ### Can I get salmonella from my cat? Yes, you can get salmonella from your cat. The bacteria spread through contact with infected stool, saliva, or contaminated food and water, so hand washing after litter box duty and before eating is the main protection [1][2]. People with weakened immune systems face the highest risk of serious illness. ### Can salmonella spread between cats in the same home? Yes, it can spread between cats. Shared litter boxes, food bowls, and water bowls make transmission easy when one cat is shedding the bacteria [1]. Separate supplies and daily cleaning lower the risk while the infection is active. ### How long does salmonella last in cats? Mild cases often improve within one to two weeks with supportive care. Some cats remain carriers and keep shedding the bacteria even after their signs go away, which is why repeat stool testing is often needed [1]. Your vet can tell you when your cat is likely clear. ### Do all cats with salmonella need antibiotics? No, most healthy adult cats do not need antibiotics. Treatment is usually reserved for cats that are young, severely affected, or a potential source of human infection, partly because antibiotics are often not fully effective and some cats stay carriers afterward [1]. Your vet will decide based on your cat's age, signs, and household risk. ### Is salmonella more common in outdoor cats? Yes, outdoor cats face a higher risk. Hunting birds and rodents, drinking from puddles, and contact with wildlife all raise exposure, and outdoor-owned cats were 3 to 5 times more likely to carry zoonotic pathogens than indoor-only cats [4]. Keeping your cat indoors is one of the most effective prevention steps. ## Related Articles - [Is Raw Food Safe for Dogs and Cats?](/knowledge/veterinary-medicine/toxicology-and-food-safety/is-raw-food-safe-for-dogs-and-cats) - [Toxoplasma in Cats: Zoonotic Risk and Immunocompromised Owners](/knowledge/veterinary-medicine/parasite-control/toxoplasma-in-cats-zoonotic-risk-and-immunocompromised-owners) - [Cat Sneezing a Lot: Allergies, Infection, or Something Else?](/knowledge/veterinary-medicine/vet-visit-decisions/cat-sneezing-a-lot) - [Cat Urinary Tract Infection Symptom](/knowledge/veterinary-medicine/symptom-guides/cat-urinary-tract-infection-symptom) - [Ear Infections In Cats Symptoms](/knowledge/veterinary-medicine/symptom-guides/ear-infections-in-cats-symptoms) - [Ticks on Cats: Safe Removal and Tick-Borne Disease Risk](/knowledge/veterinary-medicine/parasite-control/ticks-on-cats-safe-removal-and-tick-borne-disease-risk) - [Salmonella in Dogs and Cats: Symptoms, Risks, and Care](/knowledge/veterinary-medicine/digestive-and-urinary-care/salmonella-dogs-cats-symptoms-risks) - [Treating Salmonella in Cats: Home Care and Vet Options](/knowledge/veterinary-medicine/digestive-and-urinary-care/salmonella-cats-treatment-home) - [Salmonella in Cats: When Antibiotics Are Needed](/knowledge/veterinary-medicine/digestive-and-urinary-care/salmonella-cats-antibiotics) ## References 1. [Disorders Caused by Bacteria of the Digestive System in Cats - Cat Owners](https://www.merckvetmanual.com/cat-owners/digestive-disorders-of-cats/disorders-caused-by-bacteria-of-the-digestive-system-in-cats). Merck Veterinary Manual. 2. [One Health Investigation of a Household Salmonella Thompson Outbreak in Italy: Genomic and Epidemiological Characterization of an Emerging Serotype](https://pubmed.ncbi.nlm.nih.gov/41471240/). Pathogens (Basel, Switzerland), 2025. 3. [Detection, identification, and co-carriage patterns of different bacterial and yeast pathogens isolated from diarrheic and apparently healthy dogs and cats](https://pubmed.ncbi.nlm.nih.gov/42710186/). Comparative immunology, microbiology and infectious diseases, 2026. 4. [Outdoor roaming of owned cats elevates risk of zoonotic pathogen exposure: A global synthesis](https://pubmed.ncbi.nlm.nih.gov/42008600/). PLoS pathogens, 2026. 5. [Ultrasonographic appearance of the ileocecocolic junction in cats with salmonellosis](https://pubmed.ncbi.nlm.nih.gov/40386038/). Frontiers in veterinary science, 2025. 6. [Outbreak of Salmonella Typhimurium ST19 linked to passerine birds and cats in Norway, March to July 2024](https://pubmed.ncbi.nlm.nih.gov/41642547/). European journal of clinical microbiology & infectious diseases : official publication of the European Society of Clinical Microbiology, 2026. ## Further Reading - [Merck Veterinary Manual: Cat Owners](https://www.merckvetmanual.com/cat-owners) - [Cornell Feline Health Center: Health Information](https://www.vet.cornell.edu/departments-centers-and-institutes/cornell-feline-health-center/health-information) - [American Veterinary Medical Association: Pet Care](https://www.avma.org/resources-tools/pet-owners/petcare)