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Emergence of CC398 MRSA in New Zealand

ABSTRACT: This study describes the emergence and evolution of CC398 MRSA in New Zealand

PROVIDER: PRJEB12552 | ENA |

REPOSITORIES: ENA

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			Action	DRS
		Other
		Other
	ERR1682010_1.fastq.gz	Fastqsanger.gz
	ERR1682010_2.fastq.gz	Fastqsanger.gz
	ERR1682020_1.fastq.gz	Fastqsanger.gz

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Project description:Methicillin-resistant Staphylococcus aureus clonal complex (CC) 398 has emerged from pigs to cause human infections in Europe and North America. We used a new 62-strain S. aureus microarray (SAM-62) to compare genomes of isolates from three geographical areas (Belgium, Denmark, and Netherlands) to understand how CC398 colonizes different mammalian hosts. The core genomes of 44 pig isolates and 32 isolates from humans did not vary. However, mobile genetic element (MGE) distribution was variable including SCCmec. Phi3 bacteriophage and human specificity genes (chp, sak, scn) were found in invasive human but not pig isolates. SaPI5 and putative ruminant specificity gene variants (vwb and scn) were common but not pig specific. Virulence and resistance gene carriage was host associated but country specific. We conclude MGE exchange is frequent in CC398 and greatest among populations in close contact. This feature may help determine epidemiological associations among isolates of the same lineage. [Data is also available from http://bugs.sgul.ac.uk/E-BUGS-120]

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Exoproteome analysis of Staphylococcus aureus clinical isolates belonging to different clonal complexes (C22, CC8 and CC398)

Project description:Studies on S. aureus sub-populations revealed that genomes are well conserved between isolates from the same lineages despite geographic, temporal and selective diversity. However, variation of hundreds of genes can occur between isolates from different lineages and these genes could be involved in interaction with host components. In this study, we aimed to investigate the diversity of secreted virulence factors in human and zoonotic S. aureus isolates from different clonal complexes. We focused on the S. aureus clonal complexes (CC) 8 and CC22 as dominant human lineages, and CC398 as dominant livestock-associated MRSA (LA-MRSA) which is disseminating rapidly. To study the diversity of secreted virulence factors, we compared their extracellular proteomes using label-free LC-MS/MS analysis. A common protein database was created based on DNA sequencing data and PAN genome IDs.

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