Dog-Borne Zoonotic Diseases: Risks & Prevention for Humans

Zoonoses: Diseases Dogs Can Share

Most dog germs don't infect humans. These do—especially for immunocompromised, children, elderly, pregnant.

Key Zoonotic Pathogens

Disease	Pathogen	Transmission	Human Symptoms
Rabies	Lyssavirus	Saliva via bite	Fatal encephalitis. Post-exposure prophylaxis urgent.
Leptospirosis	Leptospira bacteria	Urine-contaminated water/soil	Flu-like → Weil's syndrome (liver/kidney failure).
Salmonellosis	Salmonella	Fecal-oral, raw diet handling	Diarrhea, fever, cramps. Severe in vulnerable.
Campylobacteriosis	Campylobacter	Fecal-oral, raw poultry	Bloody diarrhea, fever. Guillain-Barré risk.
Giardiasis	Giardia protozoan	Cysts in feces/water	Diarrhea, gas, malabsorption.
Roundworm/Hookworm	Toxocara, Ancylostoma	Larvae in contaminated soil	Visceral/ocular larva migrans (kids).
Ringworm	Dermatophyte fungus	Direct contact, spores	Itchy circular rash.
MRSA	Methicillin-resistant Staph	Skin contact, shared items	Skin infections, rarely invasive.

Non-Infectious Risks

• Allergies: dander, saliva, urine proteins.
• Bites: 4.5M/yr US; 800K need medical care. Kids 5–9 highest risk.
• Falls: leash tangles, jumping, tripping over dog.

Prevention Protocol

1. Core vaccines (rabies, distemper/parvo, lepto per risk).
2. Year-round parasite prevention (heartworm + intestinal).
3. Annual fecal test.
4. Prompt feces removal (yard, walks).
5. Handwashing after handling, before eating.
6. No face licking; separate food prep areas.
7. Supervise child-dog interactions. Teach "be a tree."
8. Trim nails; dental care reduces oral bacteria.
9. Train bite inhibition, resource guarding prevention.

Responsible ownership protects your family and your dog.