High levels of background flora inhibits growth of Escherichia coli O157 :H7 in ground beef

Citation
L. Vold et al., High levels of background flora inhibits growth of Escherichia coli O157 :H7 in ground beef, INT J F MIC, 56(2-3), 2000, pp. 219-225
Citations number
26
Categorie Soggetti
Food Science/Nutrition
Journal title
INTERNATIONAL JOURNAL OF FOOD MICROBIOLOGY
ISSN journal
01681605 → ACNP
Volume
56
Issue
2-3
Year of publication
2000
Pages
219 - 225
Database
ISI
SICI code
0168-1605(20000601)56:2-3<219:HLOBFI>2.0.ZU;2-B
Abstract
The influence of natural background flora under aerobic and anaerobic incub ation on the growth of Escherichia coli O157:H7 in ground beef was investig ated. The background flora from eight different commercial ground beef were added to ground beef spiked with E. coli O157:H7 and stored either aerobic ally or anaerobically at 12 degrees C. The results showed that the presence of a large number of background bacteria in the ground meat inhibited the growth of E. coli O157:H7 both aerobically and anaerobically. Inhibition wa s more pronounced under anaerobic conditions. The background Boras consiste d mainly of lactic acid bacteria of which approximately 80% were Lactobacil lus sakei. These results show the importance of the natural background flor a in meat for inhibition of growth of E. coli O157:H7. (C) 2000 Elsevier Sc ience B.V. All rights reserved.