Staphylococcus aureus growth boundaries: moving towards mechanistic predictive models based on solute-specific effects.

Applied and Environmental Microbiology
Cynthia M StewartDonald W Schaffner

Abstract

The formulation of shelf-stable intermediate-moisture products is a critical food safety issue. Therefore, knowing the precise boundary for the growth-no-growth interface of Staphylococcus aureus is necessary for food safety risk assessment. This study was designed to examine the effects of various humectants and to produce growth boundary models as tools for risk assessment. The molecular mobility and the effects of various physical properties of humectants, such as their glass transition temperatures, their membrane permeability, and their ionic and nonionic properties, on S. aureus growth were investigated. The effects of relative humidity (RH; 84 to 95%, adjusted by sucrose plus fructose, glycerol, or NaCl), initial pH (4.5 to 7.0, adjusted by HCl), and potassium sorbate concentration (0 or 1,000 ppm) on the growth of S. aureus were determined. Growth was monitored by turbidity over a 24-week period. Toxin production was determined by enterotoxin assay. The 1,792 data points generated were analyzed by LIFEREG procedures (SAS Institute, Inc., Cary, N.C.), which showed that all parameters studied significantly affected the growth responses of S. aureus. Differences were observed in the growth-no-growth boundary when different...Continue Reading

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Citations

Nov 9, 2006·Archives of Dermatological Research·Lars Alexander SchneiderJoachim Dissemond
Dec 22, 2004·Journal of Applied Microbiology·C M StewartD W Schaffner
Apr 27, 2016·Seminars in Vascular Surgery·A ScaliseG Di Benedetto
Feb 19, 2013·International Journal of Food Microbiology·Asa RosengrenRoland Lindqvist
Jun 26, 2010·Journal of the American Academy of Dermatology·Stephan SchremlPhilipp Babilas
Jun 16, 2009·International Journal of Food Microbiology·A ValeroG Zurera
Dec 20, 2015·European Archives of Oto-rhino-laryngology : Official Journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : Affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery·Ahmet AkkocDerya Oztuna
Jan 23, 2009·International Journal of Food Microbiology·Y Le MarcA Medvedová
Aug 26, 2009·Journal of the European Academy of Dermatology and Venereology : JEADV·S SchremlP Babilas
Sep 15, 2004·International Journal of Food Microbiology·Mara Lucia StecchiniElena Venir
Apr 11, 2015·Wound Repair and Regeneration : Official Publication of the Wound Healing Society [and] the European Tissue Repair Society·Carla R KruseJens A Sørensen
Apr 4, 2017·Wound Repair and Regeneration : Official Publication of the Wound Healing Society [and] the European Tissue Repair Society·Carla R KruseKristo Nuutila
Jan 16, 2013·Journal of Food Protection·Larry R BeuchatBenno H Ter Kuile
Jul 23, 2003·Journal of Food Protection·Cynthia M StewartDonald W Schaffner
Oct 1, 2019·Oxidative Medicine and Cellular Longevity·Thoralf BernhardtLars Boeckmann
Oct 14, 2017·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Kaiwen MouXingyu Jiang
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Oct 17, 2019·Journal of Food Science·Shaheem Elahi, Hiroshi Fujikawa
May 20, 2021·Molecular Biology Reports·Betül Çelebi-Saltik, Didem Kart

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