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. 2020 Nov 18;30(1):159-169.
doi: 10.1007/s10068-020-00843-2. eCollection 2021 Jan.

Optimization of resuscitation-promoting broths for the revival of Vibrio parahaemolyticus from a viable but nonculturable state

Affiliations

Optimization of resuscitation-promoting broths for the revival of Vibrio parahaemolyticus from a viable but nonculturable state

Jae-Hyun Yoon et al. Food Sci Biotechnol. .

Abstract

This study was conducted to examine the effect of formulated resuscitation-promoting broths on the revival of viable but nonculturable Vibrio parahaemolyticus induced by cold and starvation stresses. Vibrio parahaemolyticus was incubated in artificial sea water at 4 °C for more than 8 months until this bacterium became undetectable, while retaining its intact cell count of more than 105 CFU/field over time. On day 250, V. parahaemolyticus was collected and enriched in tryptic soy broth supplemented with 3% NaCl, 10,000 U/mg catalase, 2% sodium pyruvate, 20 mM MgSO4, 5 mM EDTA, and a cell-free supernatant taken from V. parahaemolyticus ATCC 17802 in the stationary phase (pH 8). V. parahaemolyticus returned partially to a culturable state with a maximal cell density of 7.91 log CFU/mL in this formulated medium following 7 days of enrichment at 25 °C. In contrast, no V. parahaemolyticus was resuscitated when enriched in alkaline peptone water and tryptic soy broth.

Keywords: Food safety; Pathogen; Resuscitation; Viable but nonculturable; Vibrio parahaemolyticus.

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Conflict of interest statement

Conflict of interestNo conflict of interests was declared.

Figures

Fig. 1
Fig. 1
Changes in (A, C, and E) the colony-forming ability and (B, D, and F) membrane integrity of (AB) V. parahaemolyticus ATCC 17082, (CD) V. parahaemolyticus ATCC 33844, and (EF) V. parahaemolyticus ATCC 27969 inoculated in ASW (pH 6) at 4 °C

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