Interaction of pH and NaCl on Enumeration of Heat-Stressed Staphylococcus aureus-Reference-Cited by-同舟云学术

Interaction of pH and NaCl on Enumeration of Heat-Stressed Staphylococcus aureus

Published:1974-03 Issue:3 Volume:27 Page:443-447
ISSN:0003-6919
Container-title:Applied Microbiology
language:en
Short-container-title:Appl Microbiol

Author:

Smolka Lawrence R.¹²,Nelson F. Eugene¹²,Kelley Lee M.¹²

Affiliation:

1. Department of Microbiology and Medical Technology, The University of Arizona, Tucson, Arizona 85721

2. Department of Dairy and Food Sciences, The University of Arizona, Tucson, Arizona 85721

Abstract

The effect of pH level and NaCl concentrations, alone and in combination, on the enumeration of unstressed and heat-stressed cells of three strains of Staphylococcus aureus was determined. A definite narrowing of the optimum pH range for enumeration of both unstressed and heat-stressed cells was observed as the NaCl concentration was increased from 0.0 to 7.5%. Counts of unstressed cells diminished only slightly with increases in NaCl, whereas heat-stressed cells showed a marked sensitivity to NaCl concentrations of 4% and above, regardless of the pH level. Because of this sensitivity to NaCl, recoveries were far poorer than with unstressed cells at NaCl concentrations of 4% and above.

Publisher

American Society for Microbiology

Subject

General Pharmacology, Toxicology and Pharmaceutics,General Immunology and Microbiology,General Biochemistry, Genetics and Molecular Biology,General Medicine

Link

https://journals.asm.org/doi/pdf/10.1128/am.27.3.443-447.1974

Reference17 articles.

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5. Effect of sodium chloride and pH on enterotoxin C production;Genigeorgis C.;Appl. Microbiol.,1971

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