Influence of temperature variations on growth, injury survival and inactivation of Listeria monocytogenes in goat milk samples at laboratory scale

Suguna Migeemanathan, and Rajeev Bhat, and Wan Nadiah Wan Abdullah, and Fook , Yee Chye (2014) Influence of temperature variations on growth, injury survival and inactivation of Listeria monocytogenes in goat milk samples at laboratory scale. International Journal of Dairy Technology . ISSN 1364727X

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Official URL: http://dx.doi.org/10.1111/1471-0307.12140

Abstract

Transmission of the thermo-tolerant pathogen Listeria monocytogenes via contaminated milk and its products, can lead to serious food-borne illness. In this study, the effects of selected temperatures on survival, percentage injury and inactivation of L. monocytogenes in goat milk samples collected from two different farms were evaluated. Low temperature ranges (0, 5, 10 °C) had a bacteriostatic effect; while at temperatures of 25 and 45 °C, this pathogen grew luxuriantly. However, growth was comparatively slow at 15 °C throughout a 12-h stress period. Furthermore, a high temperature range (50, 55, 60 and 65 °C) resulted in the elimination of this pathogen within 4 h of stress. Results of Scanning Electron Microscopy showed morphological changes in the cells upon induction of stress temperatures.

Item Type:Article
Uncontrolled Keywords:Bacteriostatic state, Goat milk, Heat resistance, Injury, Listeria monocytogenes
Subjects:T Technology > T Technology (General)
ID Code:9292
Deposited By:IR Admin
Deposited On:08 Jul 2014 15:46
Last Modified:16 Feb 2015 15:00

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