ABSTRACT: Absence of high priority critically important antimicrobial resistance in Salmonella sp. isolated from Australian commercial egg layer environments
Project description:Escherichia coli and Salmonella spp. isolated from Australian meat chickens remain susceptible to critically important antimicrobial agents
| PRJNA573547 | ENA
Project description:Identification and molecular characterization of critically important antimicrobial-resistant Escherichia coli isolated from Australian Silver Gull faecal samples
Project description:Association of egg mass and egg sex: gene expression analysis from maternal RNA in the germinal disc region of layer hens (Gallus gallus)
Project description:Comparative analysis of gene expression profiles in newly developed housing systems is important to understand gene functions in chicken for adaptation and possible gene-environment interactions among layer lines. Therefore, the objective of this study was to characterize the molecular processes that are different among the two layer lines Lohmann Selected Leghorn (LSL) and Lohmann Brown (LB) using whole genome RNA expression profiles. Despite their approximately identical egg production performance these layer lines differ markedly in other phenotypic traits. The two layer lines were kept under the production environment of the newly developed small group housing system Eurovent German with two different group sizes and three tiers. We used a chicken RNA microarray to identify differentially expressed genes among the two layer lines LSL and LB.
Project description:Comparative analysis of gene expression profiles in newly developed housing systems is important to understand gene functions in chicken for adaptation and possible gene-environment interactions among layer lines. Therefore, the objective of this study was to characterize the molecular processes that are different among the two layer lines Lohmann Selected Leghorn (LSL) and Lohmann Brown (LB) using whole genome RNA expression profiles. Despite their approximately identical egg production performance these layer lines differ markedly in other phenotypic traits. The two layer lines were kept under the production environment of the newly developed small group housing system Eurovent German with two different group sizes and three tiers.
Project description:Staphylococcus aureus (S. aureus) is one of the most important pathogens in humans and animals. The formation of S. aureus biofilm is considered an important mechanism of antimicrobial resistance. Therefore, finding effective drugs against the biofilm produced by S. aureus has been a high priority. Licochalcone A, a natural plant product, was reported to have antibacterial activities and showed good activity against all 21 tested strains of S. aureus biofilm and planktonic cells. To detect the possible molecular mechanism of Licochalcone A against S. aureus biofillm or planktonic cells, Affymetrix GeneChips were used to determine the global comparative transcription of S. aureus biofilm and planktonic cells triggered by treatment with sub-bactericidal and sub-inhibitory concentrations of Licochalcone A, respectively. Staphylococcus aureus planktonic cells and biofilm were exposed for 60 minutes to Licochalcone A at concentration of 2 M-NM-<g/ml (1/2M-CM-^W MIC) and 64 M-NM-<g/ml (4M-CM-^W MIBC), respectively. 4 samples including 4 control samples are analyzed.