Genetic Diversity of Bacillus cereus Clinical Isolates
Author Information
Author(s): Hoffmaster Alex R, Novak Ryan T, Marston Chung K, Gee Jay E, Helsel Leta, Pruckler James M, Wilkins Patricia P
Primary Institution: National Center for Zoonotic, Vector-borne, and Enteric Diseases, Centers for Disease Control and Prevention, Atlanta, USA
Hypothesis
Are Bacillus cereus isolates associated with varying illness severity clonal or do they form clonal complexes?
Conclusion
Bacillus cereus isolates are phylogenetically diverse and distributed among two of three previously described clades.
Supporting Evidence
- 55 clinical isolates were analyzed, revealing 38 distinct sequence types.
- Isolates associated with severe illness were found in two distinct clades.
- Only three sequence types were observed more than once among epidemiologically distinct isolates.
Takeaway
Scientists studied bacteria that can cause food poisoning and other illnesses to see if they are all related or different. They found that these bacteria are quite different from each other.
Methodology
Multilocus sequence typing (MLST) was used to analyze 55 clinical Bacillus cereus isolates from 1954 to 2004.
Potential Biases
The sampling may be biased towards clinical isolates, potentially overlooking environmental strains.
Limitations
The study's findings are based on a limited number of isolates, which may not represent the entire population structure of Bacillus cereus.
Participant Demographics
Isolates were collected from 19 states in the U.S. and included strains associated with severe infections and gastrointestinal illness.
Digital Object Identifier (DOI)
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