Abstract:
:Vibrio cholerae can shift to a "rugose" phenotype, thereby producing copious exopolysaccharide (EPS), which promotes its environmental survival and persistence. We report conditions that promote high-frequency rugose EPS production (HFRP), whereby cells switch at high frequency (up to 80%) to rugose EPS production. HFRP appeared to be more common in clinical strains, as HFRP was found in 6 of 19 clinical strains (32%) (including classical, El Tor, and non-O1 strains) but in only 1 of 16 environmental strains (6%). Differences were found between strains in rugose colony morphology, conditions promoting HFRP, the frequency of rugose-to-smooth (R-S) cell reversion, and biofilm formation. We propose that rugose EPS and HFRP provide an evolutionary and adaptive advantage to specific epidemic V. cholerae strains for increased persistence in the environment.
journal_name
Appl Environ Microbioljournal_title
Applied and environmental microbiologyauthors
Ali A,Rashid MH,Karaolis DKdoi
10.1128/aem.68.11.5773-5778.2002keywords:
subject
Has Abstractpub_date
2002-11-01 00:00:00pages
5773-8issue
11eissn
0099-2240issn
1098-5336journal_volume
68pub_type
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