Project description:Liquid cultures of Enterococcus faecalis OG1RF and OG1RF Δbph were grown in tryptic soy broth without added dextrose (TSB-D) for 2 and 4 hr. At each time point, the transcriptomes were compared to identify differentially expressed genes in the Δbph mutant.
Project description:Changes in Enterococcus faecalis OG1RF gene expression during infection in a rabbit model of subdermal abscess formation were studied using microarray analysis.
Project description:Changes in Enterococcus faecalis OG1RF(pCF10) gene expression at 4 hours post-infection in a rabbit model of subdermal abscess formation were studied using RNA-seq analysis.
Project description:Changes in Enterococcus faecalis OG1RF gene expression during infection in a rabbit model of subdermal abscess formation were studied using microarray analysis. Samples assayed in arrays consisted of the input inoculum and total RNA collected from the subdermal chambers at 2 and 8 hours post-inoculation. Alexa647-labeled samples were co-hybridized with 0.5 micrograms of sheared OG1RF genomic DNA labeled with Cy3 as a standard reference between chips. Four biological replicates were performed for each of the 3 time points.
Project description:Enterococcus faecalis is a common commensal organism and a prolific nosocomial pathogen that causes biofilm-associated infections. Numerous E. faecalis OG1RF genes required for biofilm formation have been identified, but few studies have compared genetic determinants of biofilm formation and biofilm morphology across multiple conditions. Here, we cultured transposon (Tn) libraries in CDC biofilm reactors in two different media and used Tn sequencing (TnSeq) to identify core and accessory biofilm determinants, including many genes that are poorly characterized or annotated as hypothetical. Multiple secondary assays (96-well plates, submerged Aclar, and MultiRep biofilm reactors) were used to validate phenotypes of new biofilm determinants.
