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Lysozyme as a barrier to growth of Bacillus anthracis strain Sterne in liquid egg white, milk and beef
Citation
Sung, K and Khan, SA and Nawaz, MS and Cerniglia, CE and Tamplin, ML and Phillips, RW and Kelley, LC, Lysozyme as a barrier to growth of Bacillus anthracis strain Sterne in liquid egg white, milk and beef, Food Microbiology, 28, (6) pp. 1231-1234. ISSN 0740-0020 (2011) [Refereed Article]
Copyright Statement
Elsevier
DOI: doi:10.1016/j.fm.2011.03.002
Abstract
In this study, we investigated the role of lysozyme on the viability of Bacillus cereus, Bacillus subtilis, Bacillus pumilus and Bacillus anthracis (Sterne) in egg white (EW), ground beef and milk. At 35°C in EW, growth rates
(GR) for B. cereus, B. subtilis, B. pumilus and B. anthracis were 0.005, 0.018, 0.028 and 0.029 OD600/h, respectively. Heat-treating EW at 55 and 60°C reduced the inactivating effect of EW by 3.1 and 10.5-fold, respectively. Addition of lysozyme (2 mg/ml) to 60°C-treated EW increased the inactivation rate 5.76-fold, indicating involvement of lysozyme in B. anthracis inactivation. B. anthracis inactivation was influenced by pH, as shown by a progressive increase in inactivation rate from 0.25 to4.42 logs CFU/h over a pH range of
6.0-8.5. Adding 2 mg/ml lysozyme to milk and ground beef also suppressed the growth of B. anthracis 3.3 and 6.5-fold, respectively. These data indicate that lysozyme, as a natural component of EW or potential additive in other foods, could reduce biothreat risks presented by bioterror agents.
Item Details
Item Type: | Refereed Article |
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Keywords: | Bacillus anthracis, lysozyme, spore, egg white, inactivation |
Research Division: | Agricultural, Veterinary and Food Sciences |
Research Group: | Food sciences |
Research Field: | Food packaging, preservation and processing |
Objective Division: | Health |
Objective Group: | Public health (excl. specific population health) |
Objective Field: | Food safety |
UTAS Author: | Tamplin, ML (Professor Mark Tamplin) |
ID Code: | 75778 |
Year Published: | 2011 |
Web of Science® Times Cited: | 13 |
Deposited By: | Agricultural Science |
Deposited On: | 2012-02-15 |
Last Modified: | 2015-02-05 |
Downloads: | 0 |
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