Companion Animal Welfare

Dog Leptospirosis Vaccination and Welfare

Leptospirosis causes severe and often fatal organ failure in dogs and is preventable through vaccination.

Key Facts

Leptospirosis is caused by Leptospira bacteria spread through infected urine in water environments
The disease causes acute liver and kidney failure with high mortality without early treatment
L4 vaccines protect against four major serovars and are recommended annually for at-risk dogs
Dogs with access to waterways or rat habitats are at highest risk
Early recognition of fever, jaundice, and reduced urination allows treatment before organ failure

Welfare Considerations

Leptospirosis causes severe acute suffering through organ failure that is often fatal. Vaccination is highly effective and the most important preventive measure for dogs with outdoor and water access in at-risk areas.

What You Can Do

Vaccinate dogs with L4 vaccine annually especially in areas with rat populations or water access
Seek veterinary care immediately for any dog showing fever, jaundice, or reduced urination
Avoid dogs drinking from stagnant water sources in at-risk environments