Understanding the Genomes of Haemophilus influenzae Strains
Author Information
Author(s): Hogg Justin S, Hu Fen Z, Janto Benjamin, Boissy Robert, Hayes Jay, Keefe Randy, Post J Christopher, Ehrlich Garth D
Primary Institution: Allegheny General Hospital, Allegheny-Singer Research Institute, Center for Genomic Sciences, Pittsburgh, Pennsylvania, USA
Hypothesis
The distributed genome hypothesis (DGH) posits that chronic bacterial pathogens utilize polyclonal infection and reassortment of genic characters to ensure persistence in the face of adaptive host defenses.
Conclusion
The study developed a finite supragenome model that predicts the NTHi supragenome contains between 4,425 and 6,052 genes, supporting the distributed genome hypothesis.
Supporting Evidence
- 2,786 genes were identified among the strains, with 1,461 common to all strains.
- Comparisons revealed between 107 and 158 insertions and 100 and 213 deletions per genome.
- The mean insertion and deletion sizes were 1,356 and 1,020 base-pairs, respectively.
Takeaway
Scientists studied the genes of different strains of a bacteria called Haemophilus influenzae to see how they change and adapt, finding that they share many genes that help them survive.
Methodology
The genomes of 12 clinical nontypeable H. influenzae strains were sequenced and compared with a reference strain to characterize the core and supragenomes.
Potential Biases
The clustering methods may introduce bias due to frame shifts and assembly gaps.
Limitations
The study may have biases due to the use of unfinished genomes and potential sequencing errors.
Participant Demographics
The study involved 12 clinical strains of nontypeable H. influenzae isolated from patients.
Statistical Information
Confidence Interval
4,425 to 6,052
Digital Object Identifier (DOI)
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