1. Salmonella
Dogs, cats, reptiles, and birds can carry salmonella bacteria, leading to gastrointestinal infections in humans.
Humans can contract salmonella from pets through direct contact or exposure to their feces, saliva, or the environment they inhabit. Contaminated pet food or surfaces may also be sources of transmission.
Salmonellosis symptoms in humans may include diarrhea, stomach cramps, and fever.
2. Campylobacteriosis
Dogs, especially puppies, can carry and transmit the infectious campylobacter bacteria to humans through:
- Direct contact: Touching pets, especially their feces or areas contaminated with feces, can lead to transmission.
- Ingestion: Consuming food or water contaminated with the bacteria, which may have come from contact with pet feces, is risky.
- Handling and oral contact: Bites, scratches, or contact with contaminated surfaces, followed by touching the face, can lead to infection.
Campylobacteriosis symptoms in humans may include diarrhea, abdominal pain, fever, and nausea. Seeking medical advice is important if infection is suspected.
3. Leptospirosis
Leptospirosis is a bacterial infection caused by the leptospira bacteria.
Pets, particularly dogs, can transmit leptospirosis to humans through contact with their urine or contaminated water sources.
The bacteria can enter the body through cuts, abrasions, or mucous membranes. Additionally, indirect transmission can occur when humans come into contact with soil or surfaces contaminated with infected urine.
Leptospirosis symptoms in humans may include fever, muscle aches, and potentially severe complications affecting the kidneys and liver. Seeking prompt medical attention is crucial if infection is suspected.
4. Staph infections (including MRSA)
Staph infections, including Methicillin-resistant Staphylococcus aureus (MRSA), can be transmitted from pets to humans through close contact.
Staphylococcus bacteria, including MRSA, can naturally reside on the skin and in the nasal passages of humans and animals, including dogs. While it’s more common for humans to transmit these bacteria to pets, pets can still carry and potentially transmit them.
Transmission from animals can occur through:
- Direct Contact: Physical contact with an infected pet, especially if the pet has an open wound or skin infection.
- Contaminated Surfaces: Touching surfaces, such as pet bedding or toys, that have been in contact with an infected pet.
Staph infections, including MRSA, can cause skin and soft tissue infections in both pets and humans. If symptoms arise, seeking medical attention is crucial for proper diagnosis and treatment.
5. Capnocytophaga infection
Capnocytophaga infection is caused by bacteria of the Capnocytophaga genus, commonly found in the mouths of dogs and cats.
While rare, human infection can occur through bites, scratches, or close contact with a pet’s saliva. People with weakened immune systems may be more susceptible.
Practicing good hygiene, particularly after interactions with pets and avoiding bites or scratches, reduces the risk.
Capnocytophaga infections can lead to symptoms ranging from mild illness to severe complications, so seeking medical attention is crucial if infection is suspected.
6. Brucellosis
Brucellosis is a bacterial infection caused by Brucella species, and it can be transmitted from animals, including dogs, to humans.
While it’s uncommon, transmission can occur through:
- Contact with infected bodily fluids: Handling tissues or fluids from an infected animal, especially during birthing or abortion in dogs.
- Inhalation of airborne particles: Inhaling airborne particles contaminated with Brucella bacteria.
- Consumption of raw dairy products: Ingesting unpasteurized dairy products from infected animals can lead to infection.
Brucellosis symptoms in humans may include fever, joint pain, and fatigue. Given the potential severity of brucellosis, seeking medical attention is crucial if exposure occurs or symptoms develop.
7. E.Coli infections
Dogs can carry and transmit Escherichia coli (E.coli) bacteria, leading to gastrointestinal infections in humans.
Pets, especially dogs, can transmit E.coli to humans through several means:
- Fecal-Oral transmission: Contact with pet feces directly or through contaminated surfaces or objects.
- Contaminated food or water: Consumption of food or water contaminated with E. coli, possibly due to contact with pet feces.
- Direct contact: Touching pets, especially their mouths, and then touching the face or mouth without proper handwashing.
E.Coli infection symptoms in humans may include diarrhea, abdominal cramps, and, in severe cases, kidney problems. Seeking medical attention is essential if E. coli infection is suspected.
8. Bartonellosis (Cat Scratch Fever)
Bartonella infection, also known as Cat Scratch Fever or Cat Scratch Disease (CSD), is a bacterial infection that can be transmitted to humans from cats, especially kittens. The bacteria are typically present in the cat’s saliva and can be spread through bites or scratches. Fleas can also carry Bartonella, and their bites can transmit the infection.
Ways in which pets, particularly cats, can transmit Bartonella to humans:
- Bites and scratches: Direct contact with bites or scratches from an infected cat, especially kittens.
- Flea bites: Fleas that infest cats can carry Bartonella, and their bites can transmit the bacteria.
Bartonellosis symptoms in humans may include fever, swollen lymph nodes, and overall discomfort. Seeking medical attention is crucial if symptoms develop after contact with an infected cat or flea bites.
9. Pasteurella infections
Pasteurella infections, caused by bacteria of the Pasteurella genus, can be transmitted from pets, particularly cats and dogs, to humans through bites, scratches, or close contact with the animal’s saliva. Pasteurella is a normal part of the oral flora in many pets, but it can lead to infections in humans if introduced into wounds.
Ways in which pets can transmit Pasteurella infections to humans:
- Bites and scratches: Direct contact with bites or scratches, especially if the skin is broken, allowing the bacteria to enter.
- Contact with saliva: Close contact with an infected pet’s saliva, such as through licking open wounds or mucous membranes.
Pasteurella infection symptoms may include redness, swelling, and pain at the site of the wound, along with systemic symptoms in severe cases.
10. Psittacosis (Parrot fever)
Psittacosis or parrot fever, is a bacterial infection caused by chlamydia psittaci. While it is commonly associated with birds, especially parrots and other psittacine birds, it can spread to humans.
Here’s how pets, particularly birds, can potentially transmit psittacosis:
- Inhalation of respiratory secretions: The bacteria are commonly found in the respiratory secretions of infected birds. Inhaling airborne particles or dust containing these secretions can lead to transmission.
- Direct contact: Handling infected birds or coming into contact with their feathers, droppings, or respiratory discharges can pose a risk.
- Contaminated surfaces: Contact with surfaces or objects contaminated with the bacteria, such as cages, food bowls, or perches, may contribute to transmission.
Symptoms of psittacosis in humans can include fever, chills, headache, muscle aches, and respiratory symptoms like cough and difficulty breathing.
Psittacosis is not commonly transmitted from pet birds to humans, and the risk can be further minimized by practicing good hygiene:
- Wash hands thoroughly after handling birds or cleaning their cages.
- Avoid close contact with the face or mouth when handling birds.
- Keep bird cages, accessories, and the surrounding environment clean.
If there are concerns about psittacosis or if symptoms develop after exposure to birds, seeking medical advice is essential.