Leptospirosis is something you do NOT want your dog to get, and you can prevent it.
It’s a bacterial disease spread by rodents (like rats) and various other critters, and spread through the urine which occurs in ponds, swamps, creeks and absolutely in puddles in the big city. In fact, lepto is as common – maybe more common – in urban areas.
People can get leptospirosis from their dog, though it’s not common, it’s important to understand that it can and does happen.
Most important – prevention is as easy a vaccine.