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Updated: Aug 20, 2026

In Vivo Mouse Model of Spinal Implant Infection
Published on: June 23, 2020
[Spondylodiscitis caused by a strain of Staphylococcus aureus, in vitro sensitive to penicillin]
Jirí Benes1, Mária Kabelková, Jana Kotlíková
1Department of Infectious Diseases, 3rd Medical Faculty, Charles University Prague, Budínova 2, 180-81 Prague 8, Czech Republic. benes@cesnet.cz
Abstract:
The case history of a man referred to our department with the diagnosis of purulent meningitis; actually, he presented spondylodiscitis of the lumbar spine with the infection spreading into the spinal canal and the left psoas muscle. The disease was caused by a strain of Staphylococcus aureus, which in vitro was sensitive to penicillin. However, treatment with crystalline penicillin in combination with ciprofloxacin failed. The paper suggests a differential diagnosis permitting to distinguish a typical purulent meningitis and an abscess in the spinal canal. The authors also discuss the suitability of administering penicillin in staphylococcal sepsis caused by a sensitive strain. The authors do not recommend crystalline penicillin in the management of severe staphylococcal infections even in cases, where the isolated S. aureus strain is really sensitive to penicillin.
Insights
A patient with suspected meningitis had lumbar spondylodiscitis caused by Staphylococcus aureus. Despite penicillin sensitivity, treatment failed, highlighting challenges in severe staphylococcal infections.
Area of Science:
- Infectious Diseases
- Neurosurgery
- Orthopedic Surgery
Background:
- This case highlights a diagnostic challenge where initial symptoms suggested purulent meningitis.
- The actual diagnosis was spondylodiscitis of the lumbar spine with extensive spread.
Observation:
- A patient presented with symptoms mimicking meningitis but was found to have lumbar spondylodiscitis.
- The infection involved the spinal canal and the left psoas muscle, caused by Staphylococcus aureus.
- In vitro testing showed the Staphylococcus aureus strain was sensitive to penicillin.
Findings:
- Treatment with crystalline penicillin and ciprofloxacin was ineffective.
- The study emphasizes the importance of differentiating spinal epidural abscess from meningitis.
- Penicillin is not recommended for severe staphylococcal infections, even with in vitro sensitivity.
Implications:
- This case underscores the need for accurate differential diagnosis in spinal infections.
- It questions the clinical utility of penicillin in severe Staphylococcus aureus infections.
- Findings may influence treatment guidelines for complex spinal infections.
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