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Appl. Environ. Microbiol., 10 1995, 3656-3660, Vol 61, No. 10
RL Murphree and ML Tamplin
Vibrio cholerae 01, the causative agent of cholera, is known to persist in
estuarine environments as endogenous microflora. The recent introduction of
V. cholerae 01 into estuaries of the North and South American continents
has stimulated the need to determine the effect of controlled purification
on reducing this pathogen in edible molluscan shellfish. Experiments
defined parameters for the uptake and retention of V. cholerae 01 in
tissues of Crassostrea virginica, and these parameters were compared with
those for Escherichia coli and Salmonella tallahassee, bacteria which are
usually eliminated from moderately contaminated shellfish within 48 h.
Oysters accumulated greater concentrations of V. cholerae 01 than E. coli
and S. tallahassee. When V. cholerae 01 was exposed to controlled
purification at 15, 19 and 25 degrees C over 48 h, it persisted in oysters
at markedly higher levels than E. coli and S. tallahassee. The
concentration of a V. cholerae 01- specific agglutinin did not positively
correlate with the uptake or retention of V. cholerae 01. These data show
that state and federally approved controlled purification techniques are
not effective at reducing V. cholerae 01 in oysters.
Copyright © 1995, American Society for Microbiology
Uptake and retention of Vibrio cholerae O1 in the Eastern oyster, Crassostrea virginica
Department of Biology, Jacksonville State University, Alabama 36265, USA.
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