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Metabolomics,Unknown,Transcriptomics,Genomics,Proteomics

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Transcription profiling of Staphylococcus aureus in response to unsaturaed long chain free fatty acids

ABSTRACT: Data is also available from http://bugs.sgul.ac.uk/E-BUGS-68

INSTRUMENT(S): Bioanalyser, Spectronic Helios Alpha UV-Vis spectrophotometer

ORGANISM(S): Staphylococcus aureus

SUBMITTER:

PROVIDER: E-BUGS-68 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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The Staphylococcus aureus response to unsaturated long chain free fatty acids: survival mechanisms and virulence implications.

Kenny John G JG Ward Deborah D Josefsson Elisabet E Jonsson Ing-Marie IM Hinds Jason J Rees Huw H HH Lindsay Jodi A JA Tarkowski Andrej A Horsburgh Malcolm J MJ

PloS one 20090202 2

Staphylococcus aureus is an important human commensal and opportunistic pathogen responsible for a wide range of infections. Long chain unsaturated free fatty acids represent a barrier to colonisation and infection by S. aureus and act as an antimicrobial component of the innate immune system where they are found on epithelial surfaces and in abscesses. Despite many contradictory reports, the precise anti-staphylococcal mode of action of free fatty acids remains undetermined. In this study, tran ...[more]

PMID: 19183815

Similar Datasets

Genotyping of Staphylococcus aureus isolates causing gangrenous mastitis versus subclinical mastitis in a dairy sheep flock

Project description:Data is also available from http://bugs.sgul.ac.uk/E-BUGS-76

2009-08-07 | E-BUGS-76 | biostudies-arrayexpress

Transcription profiling of S. aureus to investigate an outbreak of severe infections with community-acquired methicillin-resistant Staphylococcus aureus carrying the Panton-Valentine leukocidin following immunization - duplicate of E-BUGS-45

Project description:BACKGROUND: Infections with community-acquired methicillin-resistant Staphylococcus aureus (CA-MRSA) are emerging worldwide. We investigated an outbreak of severe CA-MRSA infections in children following out-patient vaccination. METHODS AND FINDINGS: We carried out a field investigation after adverse events following immunization (AEFI) were reported. We reviewed the clinical data from all cases. S. aureus recovered from skin infections and from nasal and throat swabs were analyzed by pulse-field gel electrophoresis, multi locus sequence typing, PCR and microarray. In May 2006, nine children presented with AEFI, ranging from fatal toxic shock syndrome, necrotizing soft tissue infection, purulent abscesses, to fever with rash. All had received a vaccination injection in different health centres in one District of Ho Chi Minh City. Eight children had been vaccinated by the same health care worker (HCW). Deficiencies in vaccine quality, storage practices, or preparation and delivery were not found. Infection control practices were insufficient. CA-MRSA was cultured in four children and from nasal and throat swabs from the HCW. Strains from children and HCW were indistinguishable. All carried the Panton-Valentine leukocidine (PVL), the staphylococcal enterotoxin B gene, the gene complex for staphylococcal-cassette-chromosome mec type V, and were sequence type 59. Strain HCM3A is epidemiologically unrelated to a strain of ST59 prevalent in the USA, although they belong to the same lineage. CONCLUSIONS: We describe an outbreak of infections with CA-MRSA in children, transmitted by an asymptomatic colonized HCW during immunization injection. Consistent adherence to injection practice guidelines is needed to prevent CA-MRSA transmission in both in- and outpatient settings. Data is also available from http://bugs.sgul.ac.uk/E-BUGS-45

2009-01-16 | E-BUGS-45 | biostudies-arrayexpress

Transcription profiling of Yersinia enterocolitica reveals YtxR acts as an overriding transcriptional off switch for the Ysc-Yop type 3 secretion system

Project description:Data is also available from http://bugs.sgul.ac.uk/E-BUGS-53

2008-11-17 | E-BUGS-53 | biostudies-arrayexpress

Transcription profiling of C. difficile following antibiotic stress

Project description:Data is also available from http://bugs.sgul.ac.uk/E-BUGS-56

2008-11-18 | E-BUGS-56 | biostudies-arrayexpress

Transcription profiling of C. difficile following environmental stress

Project description:Data is also available from http://bugs.sgul.ac.uk/E-BUGS-55

2008-11-18 | E-BUGS-55 | biostudies-arrayexpress

The distribution of mobile genetic elements (MGEs) in MRSA CC398 is associated with both host and country.

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]

2012-01-21 | E-BUGS-120 | biostudies-arrayexpress

Staphylococcus aureus CC398 Clade Associated with Human-to-Human Transmission

Project description:Staphylococcus aureus clonal complex 398 (CC398) isolates colonize livestock and can spread to human contacts. Genetic analysis of isolates epidemiologically associated with human-to-human, but not livestock, transmission in multiple countries and continents identified a common clade that was negative for tet(M) and positive for bacteriophage 3. Another group of human-to-human-transmitted isolates belonged to the common livestock-associated clade but had acquired a unique φ7 bacteriophage. [Data is also available from http://bugs.sgul.ac.uk/E-BUGS-124]

2012-10-29 | E-BUGS-124 | biostudies-arrayexpress

Detection of mobile-genetic-element variation between colonizing and infecting hospital-associated methicillin-resistant Staphylococcus aureus isolates.

Project description:Whole-genome analysis by 62-strain microarray showed variation in resistance and virulence genes on mobile genetic elements (MGEs) between 40 isolates of methicillin-resistant Staphylococcus aureus (MRSA) strain CC22-SCCmecIV but also showed (i) detection of two previously unrecognized MRSA transmission events and (ii) that 7/8 patients were infected with a variant of their own colonizing isolate. [Data is also available from http://bugs.sgul.ac.uk/E-BUGS-128]

2012-10-29 | E-BUGS-128 | biostudies-arrayexpress

Comparative genomic hybridization of disease causing strains of S.aureus

Project description:Data is also available from http://bugs.sgul.ac.uk/E-BUGS-30

2007-01-30 | E-BUGS-30 | biostudies-arrayexpress

Transcription profiling of community-acquired invasive and nasal carriage S.aureus isolates to identify genes associated with invasion, genomic variability and population structure

Project description:Staphylococcus aureus is the most common cause of hospital-acquired infection. In healthy hosts outside of the health care setting, S.aureus is a frequent colonizer of the human nose but rarely causes severe invasive infection such as bacteremia, endocarditis, or osteomyelitis. To identify genes associated with community-acquired invasive isolates, regions of genomic variability, and the S.aureus population structure, we compared 61 community-acquired invasive isolates of S.aureus and 100 nasal carriage isolates from healthy donors using a microarray spotted with PCR products representing every gene from the seven S.aureus sequencing projects. The core genes common to all strains were identified, and 10 dominant lineages of S.aureus were clearly discriminated. Each lineage carried a unique combination of hundreds of core variable (CV) genes scattered throughout the chromosome, suggesting a common ancestor but early evolutionary divergence. Many CV genes are regulators of virulence genes or known or predicted to be expressed on the bacterial surface and to interact with the host during nasal colonization and infection. Within each lineage, isolates showed substantial variation in the carriage of mobile genetic elements and their associated virulence and resistance genes, indicating frequent horizontal transfer. However, we were unable to identify any association between lineage or gene and invasive isolates. We suggest that the S.aureus gene combinations necessary for invasive disease may also be necessary for nasal colonization and that community-acquired invasive disease is strongly dependent on host factors. Data is also available from http://bugs.sgul.ac.uk/E-BUGS-33

2007-01-30 | E-BUGS-33 | biostudies-arrayexpress

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