Owning a pet is a rewarding experience. Whether it’s a playful dog wagging its tail or a cat curled up in your lap, pets bring comfort, joy, and companionship into our lives. However, as with any relationship, there are some potential risks.
While it’s rare, pets can pass on diseases to humans through bacteria, viruses, parasites, and fungi. These diseases, called zoonotic diseases, can be transmitted through direct or indirect contact with your pet. It’s essential to know what these diseases are, how they spread, and what you can do to protect yourself and your family.
Here’s everything you need to know about the most common diseases you can get from pets, how they spread, and most importantly, how to protect yourself.
Bacterial Infections

Bacteria are among the most common ways pets can pass diseases to humans. While bacteria in pets’ mouths and waste don’t usually cause issues for them, they can lead to serious infections in humans.
Salmonella, a type of bacteria commonly found in the intestines of animals, is most often spread through direct contact with pet feces, contaminated water, or food that has been handled by infected pets. The symptoms of salmonellosis include nausea, vomiting, diarrhea, and abdominal cramps.
Campylobacteriosis is another bacterial infection commonly found in pet feces, particularly from dogs and cats, and it causes gastrointestinal symptoms such as diarrhea, cramping, and fever. Cat scratch disease, caused by bacteria found in cats’ mouths and claws, can enter the body through broken skin from scratches or bites, leading to fever, fatigue, and swollen lymph nodes near the site of the scratch.
Rat-bite fever, spread through bites or contact with contaminated bedding, can cause fever, vomiting, and a rash. Practicing good hygiene, like washing your hands thoroughly after handling your pet or cleaning their cage, can greatly reduce the risk of infection.
Parasitic Infections

Parasites are another common way that diseases are passed from pets to humans. These tiny creatures can live on your pet, in their waste, or in the environment, and can cause a range of health issues for both pets and humans.
Roundworms and hookworms are intestinal parasites that shed eggs through pet feces and can be transmitted to humans through contaminated soil or surfaces. If the larvae penetrate the skin, they cause itching and irritation.
Giardiasis, a stomach infection caused by a microscopic parasite, can be contracted by humans through contact with infected water or feces. Symptoms include diarrhea, cramps, and nausea.
Toxoplasmosis, often associated with cats, can be spread through contact with contaminated cat litter or soil, and while it generally causes mild flu-like symptoms, it can be particularly dangerous for pregnant women, leading to birth defects or miscarriage.
Cryptosporidiosis, another waterborne parasite, can cause watery diarrhea and dehydration, and is spread through contact with infected pet feces. Ensuring your pet is dewormed regularly, cleaning up after them promptly, and washing your hands after handling them will help reduce the risk of parasitic infections.
Viral Infections

While viral infections are less common, they can still be transmitted from pets to humans. Rabies is a well-known zoonotic virus that affects the nervous system and is typically spread through bites from infected animals. It is fatal once symptoms appear, and although rabies is rare in pets that are properly vaccinated, it’s still a risk in areas where wildlife carries the virus.
Psittacosis, or parrot fever, is a bacterial infection carried by pet birds. It is spread by inhaling dust from bird droppings or respiratory secretions, causing flu-like symptoms such as fever, cough, chills, and muscle aches.
Lyme disease, spread by ticks that pets may carry, is another viral infection that causes flu-like symptoms and can lead to severe complications if left untreated. Ensuring that your pets are up to date on vaccinations and flea and tick treatments, and that their living environments are regularly cleaned, will reduce the risk of viral infections being passed to humans.
Fungal Infections

Fungi can also cause a variety of infections, particularly skin conditions, that are spread from pets to humans. One of the most common fungal infections transmitted by pets is ringworm, which causes a ring-shaped rash.
Despite its name, ringworm is caused by a fungal infection, not a worm, and it can spread through direct contact or by touching surfaces that an infected animal has been on. It is highly contagious and can affect both pets and humans. People who have close contact with infected animals, such as those with pets, are at a higher risk of contracting the infection.
If you notice patches of hair missing on your pet or symptoms of ringworm, seek treatment from your veterinarian right away. For humans, antifungal creams can treat the infection, but maintaining proper hygiene and avoiding contact with infected animals can prevent the spread.
How to Protect Yourself and Your Pet
While the risks are real, they are manageable with the right precautions. Here are some tips to keep both you and your pets healthy: Always wash your hands thoroughly after handling your pet, especially after cleaning litter boxes or picking up pet waste.
Ensure your pet receives regular health checks, vaccinations, and flea treatments. Preventive care is essential to reduce the risk of zoonotic diseases. Keep your pet’s living environment clean by regularly washing bedding, toys, and food bowls.
Clean any accidents or messes quickly to prevent contamination. Don’t allow your pet to lick open wounds or eat from your plate. Avoid kissing your pet on the mouth, especially if they have been out
