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Applied and Environmental Microbiology logoLink to Applied and Environmental Microbiology
. 1996 Aug;62(8):3023–3025. doi: 10.1128/aem.62.8.3023-3025.1996

Production of thermostable direct hemolysin by Vibrio parahaemolyticus enhanced by conjugated bile acids.

R Osawa 1, S Yamai 1
PMCID: PMC168089  PMID: 8702295

Abstract

The effects of conjugated bile acids, glycocholic acid, and taurocholic acid (TC) on production of thermostable direct hemolysin (TDH) by Vibrio parahaemolyticus were determined by a reversed passive latex agglutination assay against TDH. The amount of TDH excreted in growth medium containing either glycocholic acid or taurocholic acid (5 mM/liter) was, on a per-cell basis, 4- to 16-fold greater than that excreted in medium without the bile acids. The amounts of TDH released from lysed cells grown with the bile acids (5 mM/liter) were 4- to 32-fold greater than those from lysed cells grown without, suggesting that the bile acids enhanced synthesis of TDH within bacterial cells. These data imply that the conjugated bile acids play a key role in the pathogenicity of V. parahaemolyticus.

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Selected References

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