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Lyme Disease

Moderate severityTick-borne

Also known as: Borreliosis

A bacterial infection spread by ticks. Many dogs show no signs, but it can cause joint disease and, rarely, serious kidney problems.

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Symptoms to watch for

How it spreads

Bite of an infected black-legged (deer) tick, usually attached 24–48 hours.

Prevention

Year-round tick preventives, the Lyme vaccine, and daily tick checks.

Report a case →View the map

Educational information only — not veterinary advice. If you think your dog is sick, contact your veterinarian.