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Updated: Jul 28, 2026

Acute Myocardial Infarction in Rats
Published on: February 16, 2011
A rare and serious consequence of a rat bite
N D Downing1, G D Dewnany, P J Radford
1Department of Orthopaedic Surgery, Queen's Medical Centre, University Hospital, Nottingham, UK.
Abstract:
Contact with rat saliva or faeces can lead to infection with Streptobacillus moniliformis and the condition known as 'rat bite fever'. We report a case of septic arthritis of the hip due to this organism following a bite on the finger of a 14-year-old boy from a rat for sale in a pet shop. The case was successfully treated by arthrotomy, drainage and joint lavage followed by administration of penicillin. Septic arthritis of the hip due to S. moniliformis has not been previously described and this case highlights a possible danger of keeping rats as pets.
Insights
Rat saliva or feces can cause rat bite fever from Streptobacillus moniliformis. A hip septic arthritis case in a boy, successfully treated with penicillin, highlights pet rat dangers.
Area of Science:
- Microbiology
- Infectious Diseases
- Orthopedic Surgery
Background:
- Rat bite fever is an infection caused by Streptobacillus moniliformis.
- Transmission occurs through contact with infected rat saliva or feces.
Observation:
- A 14-year-old boy developed septic arthritis of the hip.
- The infection followed a rat bite on his finger from a pet shop rat.
Findings:
- This is the first reported case of septic arthritis of the hip caused by Streptobacillus moniliformis.
- The patient received successful treatment including arthrotomy, drainage, joint lavage, and penicillin administration.
Implications:
- This case underscores the potential risk of zoonotic infections from pet rats.
- Awareness and prompt medical attention are crucial for managing Streptobacillus moniliformis infections, especially in joint spaces.
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