Dog Leptospirosis: Prevention and Wildlife Links

Leptospirosis is a bacterial disease transmitted through wildlife-contaminated water, posing serious health risks to dogs and zoonotic risks to humans.

Key Facts

Caused by Leptospira bacteria spread through urine of infected wildlife including rats, raccoons, and deer
Dogs contract infection through contaminated water, soil, or direct contact with infected animals
Clinical signs range from mild fever to severe kidney and liver failure
Vaccination is available but does not cover all serovars; annual boosters recommended
Leptospirosis is a zoonotic disease transmissible from infected dogs to humans
Urban dogs and dogs with outdoor or water exposure have higher infection risk
Climate change and flooding events are expanding geographic distribution of leptospirosis

Welfare Considerations

Acute leptospirosis causes significant suffering through fever, muscle pain, vomiting, and rapidly progressing organ failure. Dogs requiring intensive care hospitalization experience both the physical illness and the stress of hospitalization. Prevention through vaccination, avoiding stagnant water exposure, and wildlife management around homes is far more welfare-positive than treating established disease.

What You Can Do

Vaccinate dogs annually against leptospirosis, especially if they have outdoor or water exposure
Avoid allowing dogs to drink from stagnant ponds, puddles, or slow-moving water
Control rodent populations around your home to reduce environmental contamination
Use gloves when handling a dog suspected of leptospirosis infection
Seek emergency veterinary care if your dog develops sudden kidney or liver signs
Inform your vet of any recent flood exposure or wildlife contact when presenting sick dogs