Lepto: The Water‑Loving Germ That Can Make Dogs Sick

Let’s talk about something that pops up every spring and summer: Leptospirosis (or “lepto”). It’s a bacterial disease that dogs can catch from puddles, standing water, or areas where wildlife like raccoons or rodents have been. And yes, people can get it too.

The good news? With a little awareness, it’s usually preventable with a simple vaccine!

How Dogs Get It

Leptobacteria love damp places. Dogs can pick it up by:

• Drinking from puddles

• Splashing in ponds or muddy areas

• Sniffing spots where wildlife has been

• Contact with contaminated water or soil

What It Looks Like

Lepto can be sneaky. Some dogs get very sick, while others show mild signs.

Common symptoms include:

• Vomiting or diarrhea

• Fever

• Lethargy

• Not wanting to eat

• Increased thirst

• Jaundice (yellowing of eyes or gums)

If something feels “off,” it’s always worth checking in with a veterinarian.

Why It Matters

Lepto can cause serious kidney or liver problems if it’s not caught early. And because it’s zoonotic (meaning it can spread to humans), it’s something we take seriously.

Leptospirosis sounds scary, but with awareness and prevention, most cases can be avoided. A quick vaccine and a little caution around water go a long way in keeping your dog safe.

This article was partially generated with assistance from Microsoft CoPilot and reviewed by Mission Animal Hospital Director.