In:
Frontiers in Genetics, Frontiers Media SA, Vol. 12 ( 2021-11-18)
Abstract:
In the context of microarray-based epidemiological typing of the clonal organism Staphylococcus aureus /MRSA , a strain was identified that did not belong to known clonal complexes. The molecular analysis by microarray-based typing yielded signals suggesting that it was a mosaic or hybrid strain of two lineages. To verify this result, the isolate was sequenced with both, short-read Illumina and long-read Nanopore technologies and analysed in detail. This supported the hypothesis that the genome of this strain, ST6610-MRSA-IVg comprised of segments originating from two different clonal complexes (CC). While the backbone of the strain’s genome, i.e., roughly 2 megabases, belongs to CC8, a continuous insert of 894 kb (approx. 30% of the genome) originated from CC140. Beside core genomic markers in the normal succession and orientation, this insert also included the mecA gene, coding for PbP2a and causing methicillin resistance, localised on an SCC mec IVg element. This particular SCC mec type was also previously observed in CC140 MRSA from African countries. A second conspicuous observation was the presence of the trimethoprim resistance gene dfrG within on a prophage that occupied an attachment site normally used by Panton-Valentine Leucocidin phages. This observation could indicate a role of large-scale chromosomal recombination in the evolution of S. aureus as well as a role of phages in the dissemination of antibiotic resistance genes.
Type of Medium:
Online Resource
ISSN:
1664-8021
DOI:
10.3389/fgene.2021.723958
DOI:
10.3389/fgene.2021.723958.s001
DOI:
10.3389/fgene.2021.723958.s002
DOI:
10.3389/fgene.2021.723958.s003
DOI:
10.3389/fgene.2021.723958.s004
DOI:
10.3389/fgene.2021.723958.s005
DOI:
10.3389/fgene.2021.723958.s006
DOI:
10.3389/fgene.2021.723958.s007
DOI:
10.3389/fgene.2021.723958.s008
Language:
Unknown
Publisher:
Frontiers Media SA
Publication Date:
2021
detail.hit.zdb_id:
2606823-0
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