Occurrence and Clinical Relevance of Mycobacterium chimaera sp. nov.
Author Information
Author(s): Schweickert Birgitta, Goldenberg Oliver, Richter Elvira, Göbel Ulf B., Petrich Annette, Buchholz Petra, Moter Annette
Primary Institution: Charité-Universitätsmedizin, Berlin, Germany
Hypothesis
What is the frequency of Mycobacterium chimaera sp. nov. in clinical specimens and its role in human disease compared to M. intracellulare?
Conclusion
M. chimaera sp. nov. accounts for most of the mycobacterial isolates previously classified as M. intracellulare, but has low pathogenicity.
Supporting Evidence
- 143 out of 166 strains were identified as M. chimaera sp. nov.
- Only 3.3% of patients with M. chimaera sp. nov. exhibited mycobacterial lung disease.
- All M. intracellulare isolates caused severe pulmonary infections.
Takeaway
Scientists studied a type of bacteria called M. chimaera and found it is often confused with another type, but it doesn't make people very sick.
Methodology
Retrospective molecular genetic analysis of mycobacterial isolates from patients and comparison of species using sequencing techniques.
Potential Biases
Laboratory analysis was performed without knowledge of the clinical course of the disease, which may introduce bias.
Limitations
The study had a small number of clinically relevant isolates and relied on past hospital records.
Participant Demographics
Patients included those with underlying lung disease and immunosuppression.
Statistical Information
P-Value
p = 0.003
Statistical Significance
p<0.001
Digital Object Identifier (DOI)
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