
08/22/2025
Next up on our list is Leptospirosis.
To vaccinate or not to vaccinate!
Leptospirosis (Lepto) mainly affects dogs and is usually associated with tropical and sub-tropical areas. In BC, this is considered to be the lower mainland and along the coast, which are the areas where vaccinating dogs for Lepto is most common. In recent years though, the presence of Lepto in the interior regions of BC has been increasing. Puppies and unvaccinated adults are most at risk, but lifestyle is also a factor, with large breed mostly outdoor dogs at higher risk of exposure. The AAHA (American Animal Health Association) now considers Lepto a core vaccine and recommends vaccinating all dogs. Dogs can be exposed to Lepto through infected urine, contaminated warm and slow moving water or contaminated soil, where it can survive for months, or from the saliva from an infected animal.
Leptospirosis can cause both liver and kidney failure, as well as death. Here is a list of important signs to watch out for, though they can vary from dog to dog:
-lethargy/weakness
-loss of appetite
-high fever
Leptospirosis can infect cats, but they are considered to be more resistant to it, and there is no licensed Lepto vaccine for cats in Canada. Lepto is unfortunately zoonotic and one of the most widespread zoonotic diseases in the world.
The vaccine to protect dogs from Lepto covers all four major strains of the bacteria. This vaccine is given at 12 weeks, needs to be boostered at 16 weeks, and then given annually throughout their life.