NAVLE Rats-Mice

Rats/Mice Ulcerative Pododermatitis Study Guide

Ulcerative pododermatitis (commonly called bumblefoot or sore hocks) is a chronic, granulomatous, ulcerative dermatitis affecting the plantar (and occasionally palmar) surfaces of the feet in rats and mice.

Overview and Clinical Importance

Ulcerative pododermatitis (commonly called bumblefoot or sore hocks) is a chronic, granulomatous, ulcerative dermatitis affecting the plantar (and occasionally palmar) surfaces of the feet in rats and mice. This condition is one of the most common integumentary disorders encountered in pet rodents and laboratory animals. Secondary bacterial infection, primarily with Staphylococcus aureus, frequently complicates the condition and can lead to osteomyelitis, septicemia, and death if left untreated.

Understanding ulcerative pododermatitis is essential for the NAVLE because it represents a classic example of a husbandry-related disease with multisystemic implications. The condition demonstrates the critical relationship between environment, host factors, and opportunistic infection.

High-YieldOn the NAVLE, when you see a rodent with swollen, ulcerated footpads especially in the context of wire-floored caging or obesity, think ulcerative pododermatitis with secondary Staphylococcus aureus infection first.
Pathogen Characteristics Clinical Significance
Staphylococcus aureus Gram-positive cocci, coagulase-positive, normal skin flora Most common causative agent; produces suppurative inflammation
Pasteurella multocida Gram-negative coccobacillus Less common; may cause more aggressive infection
Escherichia coli Gram-negative rod, fecal contaminant Associated with poor sanitation and soiled bedding
Pseudomonas spp. Gram-negative, opportunistic Environmental contaminant; often antibiotic resistant

Etiology and Pathophysiology

Primary Pathophysiology

The pathogenesis of ulcerative pododermatitis begins with ischemic necrosis of soft tissues compressed between bone and hard surfaces. The sequence typically follows this pattern:

You've been studying hard

Create a free account to keep reading

Free accounts get 5 articles/day + daily practice question

Join 14,000+ vet students already studying with NavleExam.

No credit card needed — free account takes 30 seconds.

Create Free Account — Keep Reading Already have an account? Log in
or skip signup — just get daily questions

No spam. One question per day. Unsubscribe anytime.

NAVLE Exam Prep Platform

Everything you need to pass the NAVLE

10,000+ Practice Questions
Exam-style with full explanations
Past Exam Papers
Real previous exam questions
Flashcard Mode
Species & topic quick review
High-Yield Study Guides
What's actually on the exam
Start Free Trial → See Plans & Pricing No credit card required to start