Abstract:
:Several natural isolates of Escherichia coli O157:H7 have previously been shown to exhibit stationary-phase-dependent variation in their resistance to inactivation by high hydrostatic pressure. In this report we demonstrate that loss of the stationary-phase-inducible sigma factor RpoS resulted in decreased resistance to pressure in E. coli O157:H7 and in a commensal strain. Furthermore, variation in the RpoS activity of the natural isolates of O157:H7 correlated with the pressure resistance of those strains. Heterogeneity was noted in the rpoS alleles of the natural isolates that may explain the differences in RpoS activity. These results are consistent with a role for rpoS in mediating resistance to high hydrostatic pressure in E. coli O157:H7.
journal_name
Appl Environ Microbioljournal_title
Applied and environmental microbiologyauthors
Robey M,Benito A,Hutson RH,Pascual C,Park SF,Mackey BMdoi
10.1128/aem.67.10.4901-4907.2001keywords:
subject
Has Abstractpub_date
2001-10-01 00:00:00pages
4901-7issue
10eissn
0099-2240issn
1098-5336journal_volume
67pub_type
杂志文章abstract::While the contribution of Bacteria to bioremediation of oil-contaminated shorelines is well established, the response of Archaea to spilled oil and bioremediation treatments is unknown. The relationship between archaeal community structure and oil spill bioremediation was examined in laboratory microcosms and in a bio...
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