Project description:INVASION IS A COMMUNITY AFFAIR: CLANDESTINE FOLLOWERS IN THE BACTERIAL COMMUNITY ASSOCIATED TO THE ALGA CAULERPA RACEMOSA TRACK THE INVASION SOURCE
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
Project description:Endophytic bacterial community diversity
| PRJNA880008 | ENA
Project description:Rice endophytic bacterial community
Project description:To explore the bacterial community profile of the gut of the African palm weevil and to identify the abundance and diversity of lignin degradation-associated bacteria in each gut segment.
