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Polymicrobial tenosynovitis with Pasteurella multocida and other gram negative bacilli after a Siberian tiger bite
1Department of Pathology and Laboratory Medicine, Ottawa Hospital, University of Ottawa, Ottawa, Ontario, Canada K1H 8L6.
Abstract:
Mammalian bites present a considerable clinical problem because they are often associated with bacterial infections. Pasteurella multocida is a microorganism that commonly infects both canine and small feline bites. Zoonotic infections developing after large feline bites have been recognised, although their reports are limited. We describe a 35 year old man who was bitten by a Siberian tiger and who developed infectious tenosynovitis secondary to P multocida, Bergeyella (Weeksella) zoohelcum, and Gram negative bacteria most like CDC group EF-4b and comamonas species. The latter three bacteria have not been isolated previously from large feline bite wounds.
Insights
Large feline bites can cause serious bacterial infections. This case highlights rare bacteria, including Bergeyella zoohelcum, found in a Siberian tiger bite, leading to infectious tenosynovitis.
Area of Science:
- Veterinary Medicine
- Infectious Diseases
- Microbiology
Background:
- Mammalian bites pose significant risks for bacterial infections, with Pasteurella multocida being a common pathogen in domestic animal bites.
- While zoonotic infections from large feline bites are known, documented cases are infrequent.
- Understanding the microbial landscape of large feline bites is crucial for effective clinical management.
Observation:
- A 35-year-old man sustained a bite from a Siberian tiger.
- The patient developed infectious tenosynovitis, a serious inflammation of the tendon sheath.
- The infection involved a polymicrobial etiology.
Findings:
- Isolation of Pasteurella multocida, a known bite-associated pathogen.
- Identification of Bergeyella (Weeksella) zoohelcum in the bite wound.
- Detection of Gram-negative bacteria, including CDC group EF-4b and Comamonas species, previously unreported in large feline bites.
Implications:
- This case expands the spectrum of bacteria associated with large feline bites.
- Highlights the potential for novel or underreported pathogens in exotic animal-related injuries.
- Emphasizes the need for broad-spectrum antibiotic coverage and vigilant monitoring in managing severe bite wounds from large felines.