Dog Leptospirosis: Prevention and Zoonotic Risks

Leptospirosis is a serious bacterial disease in dogs that can cause kidney and liver failure and also poses risks to human health.

Key Facts

Leptospirosis is caused by Leptospira bacteria spread through infected animal urine in water and soil
Dogs are infected through contact with contaminated water, puddles, ponds, or muddy areas
Symptoms include fever, vomiting, muscle pain, jaundice, and kidney or liver failure
Leptospirosis is a zoonotic disease - humans can contract it from infected dogs
Annual vaccination is available and effective against the most common serovars
Wildlife reservoirs include rats, raccoons, deer, and cattle - urban and rural risk exists

Welfare Considerations

Leptospirosis causes severe multi-organ disease with significant suffering. Intensive treatment including antibiotics, IV fluids, and sometimes dialysis is required. Even with treatment, mortality is significant and some survivors have permanent organ damage. Vaccination is highly effective prevention and represents a clear welfare and public health priority, particularly for dogs with outdoor or water exposure.

What You Can Do

Vaccinate dogs annually for leptospirosis, especially with outdoor or water exposure
Avoid letting dogs drink from puddles, ponds, or slow-moving water
Report any suspected wildlife die-offs near water sources to local authorities
If your dog is diagnosed, wear gloves when handling urine and see your doctor
Test unvaccinated dogs with unexplained kidney or liver disease for leptospirosis
Advocate for rat control programs in areas with high leptospirosis prevalence