Mycobacterium lepraemurium

Affects: Cats

Overview

Mycobacterium lepraemurium is a causative agent of feline leprosy. It causes granulomatous lesions, characteristic of the Mycobacterium genus.

Causes

Pathogenesis: Cause of endemic disease of rats in various parts of the world, as well as feline leprosy.

feline leprosy is transmitted by bites from rats and other cats.

Disease occurs mainly in the skin and lymph nodes, causing induration, alopecia and eventual ulceration.

Nodular lesions, involving subcutaneous tissues, may be solitary or multiple and usually confined to the head region or the limbs. Nodules are fleshy and freely movable.

Educational information only. This page is general guidance and is not a substitute for professional veterinary advice. Never give medicines or change treatment without consulting a veterinarian. If your pet is unwell, contact OC Pets or seek emergency care.
Sources (reused under open licences, with thanks): Wikipedia — “Mycobacterium lepraemurium” (CC BY-SA 4.0) · Compiled by OC Pets Veterinary Clinic, updated 15-06-2026.