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Diversity of bacteriophages encoding Panton-Valentine leukocidin in temporally and geographically related Staphylococcus aureus.
- Source :
-
PloS one [PLoS One] 2020 Feb 10; Vol. 15 (2), pp. e0228676. Date of Electronic Publication: 2020 Feb 10 (Print Publication: 2020). - Publication Year :
- 2020
-
Abstract
- Production of the Panton-Valentine leukocidin (PVL) by Staphylococcus aureus is mediated via the genes lukS-PV and lukF-PV which are carried on bacteriophage ϕSa2. PVL is associated with S. aureus strains that cause serious infections and clones of community-associated methicillin-resistant S. aureus (CA-MRSA) that have additionally disseminated widely. In Western Australia (WA) the original CA-MRSA were PVL negative however, between 2005 and 2008, following the introduction of eight international PVL-positive CA-MRSA, PVL-positive WA CA-MRSA were found. There was concern that PVL bacteriophages from the international clones were transferring into the local clones, therefore a comparative study of PVL-carrying ϕSa2 prophage genomes from historic WA PVL-positive S. aureus and representatives of all PVL-positive CA-MRSA isolated in WA between 2005 and 2008 was performed. The prophages were classified into two genera and three PVL bacteriophage groups and had undergone many recombination events during their evolution. Comparative analysis of mosaic regions of selected bacteriophages using the Alignments of bacteriophage genomes (Alpha) aligner revealed novel recombinations and modules. There was heterogeneity in the chromosomal integration sites, the lysogeny regulation regions, the defence and DNA processing modules, the structural and packaging modules and the lukSF-PV genes. One WA CA-MRSA (WA518751) and one international clone (Korean Clone) have probably acquired PVL-carrying ϕSa2 in WA, however these clones did not disseminate in the community. Genetic heterogeneity made it impossible to trace the source of the PVL prophages in the other WA clones. Against this background of PVL prophage diversity, the sequence of one group, the ϕSa2USA/ϕSa2wa-st93 group, was remarkably stable over at least 20 years and associated with the highly virulent USA300 and ST93-IVa CA-MRSA lineages that have disseminated globally.<br />Competing Interests: The authors declared that no competing interests exist.
- Subjects :
- Cell Lineage
DNA, Bacterial genetics
Genotype
Geography
Lysogeny
Methicillin-Resistant Staphylococcus aureus genetics
Molecular Epidemiology
Multilocus Sequence Typing
Open Reading Frames
Prophages genetics
Virulence Factors genetics
Western Australia
Bacterial Toxins genetics
Bacteriophages genetics
Exotoxins genetics
Leukocidins genetics
Methicillin-Resistant Staphylococcus aureus virology
Subjects
Details
- Language :
- English
- ISSN :
- 1932-6203
- Volume :
- 15
- Issue :
- 2
- Database :
- MEDLINE
- Journal :
- PloS one
- Publication Type :
- Academic Journal
- Accession number :
- 32040487
- Full Text :
- https://doi.org/10.1371/journal.pone.0228676