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Experience with Nocardia asteroides in renal transplant recipients
1St Peter's Group of Hospitals, London.
Abstract:
Six cases of Nocardia asteroides infection in renal transplant recipients are described. Respiratory symptoms predominated, complicated in one case by cerebral abscess. General dissemination did not occur in any patient. Environmental testing failed to show source(s) of the organism. Nocardiosis patients should be isolated to prevent airborne spread to renal transplant recipients, who are prone to infection and from whom specimens for culture should be incubated for at least 7 days to exclude Nocardia spp.
Insights
Nocardia asteroides infections primarily cause respiratory issues in kidney transplant patients, sometimes leading to brain abscesses. Isolation of infected individuals is recommended to prevent airborne transmission to these vulnerable recipients.
Area of Science:
- Medical Microbiology
- Infectious Diseases
- Nephrology
Background:
- Renal transplant recipients are immunocompromised and susceptible to opportunistic infections.
- Nocardia asteroides is an opportunistic pathogen that can cause severe disease in immunocompromised individuals.
Observation:
- This study describes six cases of Nocardia asteroides infection in renal transplant recipients.
- Respiratory symptoms were the predominant clinical presentation.
- One patient developed a cerebral abscess, but systemic dissemination was not observed in any case.
Findings:
- Environmental investigations did not identify the source of Nocardia asteroides.
- Nocardiosis in this cohort did not lead to widespread dissemination.
- Extended incubation of cultures (at least 7 days) is crucial for diagnosing Nocardia spp. in transplant recipients.
Implications:
- Implementing isolation protocols for Nocardiosis patients is essential to prevent airborne transmission to renal transplant recipients.
- Healthcare providers should maintain a high index of suspicion for Nocardia infections in renal transplant recipients presenting with respiratory symptoms.
- Standard microbiological practices may need adjustment, including prolonged culture incubation, to ensure accurate diagnosis and timely management of Nocardia infections in this high-risk population.