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Applied and Environmental Microbiology, January 1999, p. 342-345, Vol. 65, No. 1
0099-2240/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.

Growth of Listeria monocytogenes and Yersinia enterocolitica on Cooked Modified-Atmosphere-Packaged Poultry in the Presence and Absence of a Naturally Occurring Microbiota

R. K. Barakat and L. J. Harris*

Department of Food Science, University of Guelph, Guelph, Ontario, Canada N1G 2W1

Received 6 May 1997/Accepted 2 October 1998

Cooked poultry cuts were inoculated with five-strain composite mixtures of either Listeria monocytogenes or Yersinia enterocolitica (1,000 CFU/150-g piece), packaged in 44:56 CO2-N2, and stored at 3.5, 6.5, or 10°C for up to 5 weeks. Both L. monocytogenes and Y. enterocolitica grew under all test conditions. The presence of a naturally occurring microbiota did not influence the growth of either pathogen. Addition of lactate with the shelf life extender ALTA 2341 lengthened the lag phases of L. monocytogenes and Y. enterocolitica but did not prevent their growth.

* Corresponding author. Present address: Department of Food Science and Technology, One Shields Ave., University of California, Davis, CA 95616. Phone: (530) 754-9485. Fax: (530) 752-4759. E-mail: ljharris{at}ucdavis.edu.

Applied and Environmental Microbiology, January 1999, p. 342-345, Vol. 65, No. 1
0099-2240/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.


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