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. 1976 Dec;32(6):792–798. doi: 10.1128/aem.32.6.792-798.1976

Sublethal heat stress of Vibrio parahaemolyticus.

B S Emswiler, M D Pierson, S P Shoemaker
PMCID: PMC170462  PMID: 1008556

Abstract

When Vibrio parahaemolyticsu ATCC 17802 was heated at 41 degrees C for 30 min in 100 mM phosphate-3% NaCl buffer (pH 7.0), the plate counts obtained when using Trypticase soy agar containing 0.25% added NaCl (0.25 TSAS) were nearly 99.9% higher than plate counts using Trypticase soy agar containing 5.5% added NaCl (5.5 TSAS). A similar result was obtained when cells of V. parahaemolyticus were grown in a glucose salts medium (GSM) and heated at 45 degrees C. The injured cells recovered salt tolerance within 3 h when placed in either 2.5 TSBS or GSM at 30 degrees C. The addition of chloramphenicol, actinomycin D, or nalidixic acid to 2.5 TSBS during recovery of cells grown in 2.5 TSBS indicated that recovery was dependent upon protein, ribonucleic acid (RNA, and deoxyribonucleic acid (DNA) synthesis. Penicillin did not inhibit the recovery process. Heat-injured, GSM-grown cells required RNA synthesis but not DNA synthesis during recovery in GSM. Chemical analyses showed that total cellular RNA decreased and total cellular DNA remained constant during heat injury. The addition of [6-3H]uracil, L-[U-14C]leucine, and [methyl-3H]thymidine to the recovery media confirmed the results of the antibiotic experiments.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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