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Mycoplasma hominis septic arthritis: two case reports and review
L M Luttrell1, S S Kanj, G R Corey
1Department of Medicine, Duke University Medical Center, Durham, North Carolina 27710.
Abstract:
Mycoplasma hominis is normally a commensal of humans. When the organism is pathogenic, it primarily causes disease in the genitourinary tract. Septic arthritis caused by M. hominis is a rare condition that occurs chiefly in the postpartum period, in immunosuppressed hosts, or in patients who have recently undergone urinary tract manipulation. Arthritis caused by M. hominis is clinically indistinguishable from septic arthritis caused by other bacteria. Diagnosis is often delayed because infection with this organism is not suspected or because it grows slowly, if at all, in routine culture media. Appropriate therapy often leads to a good outcome, although relapses and resistance have been reported.
Insights
Mycoplasma hominis can cause rare septic arthritis, particularly in vulnerable patients. Early diagnosis and treatment are crucial for a good outcome, though relapses can occur.
Area of Science:
- Medical Microbiology
- Infectious Diseases
- Rheumatology
Background:
- Mycoplasma hominis is a common human commensal.
- Pathogenic strains primarily affect the genitourinary tract.
- Septic arthritis is a rare but serious complication.
Observation:
- This condition predominantly affects postpartum women, immunosuppressed individuals, and those with recent urinary tract manipulation.
- Clinical presentation is indistinguishable from other bacterial septic arthritis.
- Diagnosis is frequently delayed due to low suspicion and slow growth in cultures.
Findings:
- Mycoplasma hominis septic arthritis is uncommon.
- It shares clinical similarities with other bacterial arthritis.
- Delayed diagnosis impacts patient outcomes.
Implications:
- Increased awareness is needed for timely diagnosis of Mycoplasma hominis septic arthritis.
- Standard microbiological techniques may require adaptation for optimal detection.
- Effective antimicrobial therapy is essential, with vigilance for potential resistance and relapse.