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Otitis interna as a result of Pasteurella multocida infection in a laboratory woodchuck
W Patrick McCrory1, Richard E Fish
1Department of Clinical Sciences, North Carolina State University, College of Veterinary Medicine, 4700 Hillsborough Street, Raleigh, North Carolina 27606, USA.
Abstract:
A laboratory woodchuck presented clinically with left-sided torticollis and a purulent exudate within the external auditory meatus of the left ear. Bacterial culture of the exudate resulted in a heavy growth of Pasteurella multocida. Treatment was initiated with topical and systemic antimicrobial compounds. There was no clinical improvement after 72 h of treatment, and euthanasia was elected. Radiographs correlated well with necropsy findings, confirming a diagnosis of otitis media; otitis interna was not confirmed but was suggested by the clinical presentation. To the authors knowledge, this is the first description of otitis media/interna as a result of P. multocida infection in a laboratory woodchuck.
Insights
A laboratory woodchuck developed a severe ear infection caused by Pasteurella multocida. Despite treatment, the infection led to otitis media, highlighting a rare complication in this species.
Area of Science:
- Veterinary Medicine
- Microbiology
- Pathology
Background:
- Otitis media and interna are common in various animal species, but less frequently reported in laboratory woodchucks.
- Pasteurella multocida is an opportunistic pathogen that can cause diverse infections.
Observation:
- A laboratory woodchuck presented with torticollis and purulent discharge from the left ear.
- Bacterial culture identified a heavy growth of Pasteurella multocida from the ear exudate.
Findings:
- The woodchuck was treated with topical and systemic antimicrobials, but showed no clinical improvement after 72 hours.
- Radiographs and necropsy confirmed otitis media, with clinical signs suggesting potential otitis interna.
- This case represents the first documented instance of otitis media/interna attributed to Pasteurella multocida in a laboratory woodchuck.
Implications:
- This case highlights the potential for Pasteurella multocida to cause severe otitis in laboratory woodchucks.
- It underscores the importance of considering P. multocida in the differential diagnosis of ear infections in this species.
- Further research may be warranted to understand the susceptibility and treatment protocols for P. multocida-related otitis in woodchucks.