Project description:Staphylococcus pseudintermedius can be transmitted between dogs and their owners and can cause opportunistic infections in humans. Whole genome sequencing was applied to identify the relatedness between isolates from human infections and isolates from dogs in the same households. Genome SNP diversity and distribution of plasmids and antimicrobial resistance genes identified related and unrelated isolates in both households. Our study shows that within-host bacterial diversity is present in S. pseudintermedius, demonstrating that multiple isolates from each host should preferably be sequenced to study transmission dynamics.
Project description:We performed a transcriptome analysis of Staphylococcus pseudintermedius with and without 5% (w/w) erythritol exposure to validate the mechanism of growth inhibition.
Project description:Monocytes and granulocytes were isolated from blood of TB patients and household contacts. DNA was isolated and methylation profile was measured using Illumina HumanMethylation450.
Project description:Monocytes and granulocytes were isolated from blood of TB patients and household contacts. RNA was isolated and gene expression was measured using microarrays.
Project description:Monocytes and granulocytes were isolated from blood of TB patients and household contacts. RNA was isolated and microRNA expression was measured using microarrays.
Project description:To investigate the effect of household detergents on the mouse skin barrier, we treated mouse's back skin with two household detergents (A and B) and collected the treated skin 24 hours after the application. We then performed gene expression profiling analysis using data obtained from RNA-seq of mouse skin treated with detergent A, detergent B, and PBS. We performed gene expression profiling analysis using data obtained from RNA-seq of the skin biopsy at 24 hours after the application.
Project description:Methicillin-resistant Staphylococcus aureus (MRSA) transmission in the hospital setting has been a frequent subject of investigation using bacterial genomes, but previous approaches have not yet fully utilised the extra deductive power provided when multiple pathogen samples are acquired from each host. Here, we used a large dataset of MRSA sequences from multiply-sampled patients to reconstruct colonisation of individuals in a high-transmission setting in a hospital in Thailand. We reconstructed transmission trees for MRSA. We also investigated transmission between anatomical sites on the same individual, finding that this either occurs repeatedly or involves a wide transmission bottleneck. We examined the between-subject bottleneck, finding considerable variation in the amount of diversity transmitted. Finally, we compared our approach to the simpler method of identifying transmission pairs using single nucleotide polymorphism (SNP) counts. This suggested that the optimum threshold for identifying a pair is 39 SNPs, if sensitivities and specificities are equally weighted.