If we had to choose, would we decide to share all illnesses with our pets? Of course not! Luckily, most health problems are not contagious between the species, but in the case of a zoonotic disease, humans can get very sick from their pets. Leptospirosis is definitely one illness that you don’t want to mess with.
While it’s considered more common for human transmission to result from activities in and around water, a pet who picks up Leptospira bacteria in warm water or soil could place human caregivers at risk.