Canine Leptospirosis, more commonly known as “lepto,” is a disease caused by the Leptospira bacteria, often found in contaminated soil and water. Lepto can affect both humans and animals, so it’s important to understand and prevent this potentially deadly disease by vaccinating your pet.
These bacteria thrive in water or other wet environments. As such, lepto is transmitted through contact with food and water sources that have been contaminated by urine from infected animals—this waste can find its way into puddles, lakes, and neighborhood creeks. Dogs may become infected by ingesting polluted water, infected water, or through broken skin. Once inside your pup’s system, leptospirosis bacteria begin to multiply in the liver, lungs, and kidneys. If left untreated, canine leptospirosis can cause severe organ damage and, even, death.
Signs & Symptoms of Canine Leptospirosis

Some wild animals, like rats, may become infected and never become ill, but spread the disease rapidly. Therefore, dogs in rural and urban are at risk of contracting this disease. Dogs typically begin to show signs within a week of exposure, so keep an eye out for these symptoms:
- Severe weakness or lethargy
- Nausea and vomiting
- Abdominal pain and diarrhea
- Dehydration or increased thirst and urination
If you believe your dog has contracted leptospirosis call us immediately, or contact the nearest emergency vet to schedule an appointment.
Leptospirosis Prevention & Treatment

The American Veterinary Medical Association (AVMA) recommends that all dogs receive the leptospirosis vaccine—which can also protect their humans from infection, as well. The lepto vaccine is a series of two initial visits about four weeks apart, followed by yearly booster shots and it is safe for dogs 12+ weeks of age.
Aside from making sure your pooch is properly immunized, you can take a few extra precautions to keep them safe.
- Discourage your dog from drinking or swimming in stagnant or slow-moving waters.
- Keep a safe distance from wildlife and livestock, when possible.
Humans can catch leptospirosis, although unlikely, so take measures to keep yourself and other household pets safe by cleaning up any indoor accidents quickly, safely, and thoroughly. If caught early, lepto can be treated but prevention is the best line of defense for keeping your dog protected. If you have any questions about leptospirosis or are ready to get your canine companion vaccinated, contact us today to schedule your next visit.

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