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Appl. Environ. Microbiol., Mar 1997, 1002-1005, Vol 63, No. 3
MD Whitesides and JD Oliver
Like many other gram-negative bacteria, the human pathogen Vibrio
vulnificus is induced into a viable but nonculturable (VBNC) state by
incubation at low temperatures. The ability of any bacterium to resuscitate
from this dormant state would appear to be essential if the VBNC state is
truly a survival strategy. The question as to whether the culturable cells
which appear following removal of the inducing stress are a result of true
resuscitation or of regrowth of a few residual culturable cells has long
been debated. V. vulnificus was examined for its ability to resuscitate
from this state following a temperature upshift. Several lines of
investigation, including dilution studies, determination of the time
necessary for appearance of a culturable population, and the effects of
nutrient on recovery, all indicated that, at least for V. vulnificus, true
resuscitation does occur. Our studies further suggest that nutrient is in
some way inhibitory to the resuscitation of cells in the VBNC state and
that studies which add nutrient in an attempt to detect resuscitation are
able to detect only residual culturable cells which might be present and
which were not inhibited by the added nutrient.
Copyright © 1997, American Society for Microbiology
Resuscitation of Vibrio vulnificus from the Viable but Nonculturable State
Department of Biology, University of North Carolina at Charlotte, Charlotte, North Carolina 28223-0001
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