Augmenting the Pressure-Based Pasteurization of Listeria monocytogenes by Synergism with Nisin and Mild Heat

Sadiye Aras, Md Niamul Kabir, Shahid Chowdhury and Aliyar Cyrus Fouladkhah
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Sadiye Aras: Public Health Microbiology Laboratory, Tennessee State University, Nashville, TN 37209, USA
Md Niamul Kabir: Public Health Microbiology Laboratory, Tennessee State University, Nashville, TN 37209, USA
Shahid Chowdhury: Public Health Microbiology Laboratory, Tennessee State University, Nashville, TN 37209, USA
Aliyar Cyrus Fouladkhah: Public Health Microbiology Laboratory, Tennessee State University, Nashville, TN 37209, USA

IJERPH, 2020, vol. 17, issue 2, 1-13

Abstract: The current study investigated Listeria monocytogenes inactivation using mild heat with elevated hydrostatic pressure and nisin under buffered condition. A four-strain pathogen mixture was exposed to 0 (control) and up to 9 min of (1) 4 °C elevated pressure; (2) 4 °C elevated pressure and nisin; (3) 4 °C nisin; (4) heat at 40 °C; (5) 40 °C elevated pressure; (6) 40 °C elevated pressure and nisin; and (7) 40 °C nisin. Elevated hydrostatic pressure at 400 MPa (Hub880 Explorer, Pressure BioScience Inc., Easton, MA, USA) and nisin concentration of 5000 IU/mL were used in the trials. Analyses of variance were conducted, followed by Dunnett’s- and Tukey-adjusted means separations. Under conditions of these experiments, nisin augmented ( p < 0.05) decontamination efficacy of 40 °C heat and elevated hydrostatic pressure treatments, particularly at treatment interval of 3 min. This synergism with nisin faded away ( p ≥ 0.05) as the treatment time for thermal, high-pressure, and thermal-assisted pressure processing increased. The results of our study, thus, exhibit that practitioners and stakeholders of pressure-based technologies could benefit from synergism of mild heat and nisin for short-term, high-pressure pasteurization treatments to achieve microbial safety and economic feasibility comparable to traditional heat-treated products.

Keywords: Listeria monocytogenes; high-pressure processing; nisin; pressure-assisted thermal processing; synergism (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2020
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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