Reduction by Competitive Bacteria of Listeria monocytogenes in Biofilms and Listeria Bacteria in Floor Drains in a Ready-to-Eat Poultry Processing Plant

$37.00 plus tax (Refund Policy)

Buy Article:


The ability of Listeria monocytogenes and two competitive exclusion (CE) bacteria, Lactococcus lactis subsp. lactis strain C-1-92 and Enterococcus durans strain 152, to form biofilms on coupons composed of different materials (stainless steel, plastic, rubber, glass, and silicone) was determined at 4 and 8°C. Biofilm characteristics were determined by scanning electron microscopy. L. monocytogenes produced well-formed biofilms within 24 h at 37°C on coupon surfaces. Treating Listeria-laden biofilms with the CE isolates individually at either 4 or 8°C for 3 weeks substantially reduced or eliminated listeriae in the biofilms. Treatment with L. lactis subsp. lactis strain C-1-92 and E. durans strain 152 at 4°C for 3 weeks reduced the population of L. monocytogenes in a biofilm from 7.1 to 7.7 log CFU/cm2 to 3.0 to 4.5 log CFU/cm2 and to 3.1 to 5.2 log CFU/cm2 , respectively, and treatment at 8°C for 3 weeks reduced L. monocytogenes from 7.5 to 8.3 log CFU/cm2 to 2.4 to 3.5 log CFU/cm2 and to 3.8 to 5.2 log CFU/cm2, respectively, depending on the coupon composition. These two CE isolates were combined and evaluated for control of Listeria bacteria in floor drains of a ready-to-eat poultry processing plant. The results revealed that treating the floor drains with CE four times in the first week eliminated detectable Listeria bacteria from five of six drains, and the drains remained free of detectable Listeria bacteria for 13 weeks following the first four treatments. These studies indicate that CE can effectively reduce Listeria contamination in biofilms and in flow drains of a plant producing ready-to-eat poultry products.

Document Type: Research Article


Affiliations: 1: Center for Food Safety, University of Georgia, Griffin, Georgia 20333, USA 2: Ecolab, 655 Lone Oak Drive, Eagan, Minnesota 55121, USA 3: David Baker & Associates, 2630 Braffington Court, Atlanta, Georgia 30350, USA 4: Center for Food Safety, University of Georgia, Griffin, Georgia 20333, USA.

Publication date: April 1, 2013

More about this publication?
  • IAFP members must first sign in on the right to access full text articles of JFP

    First published in 1937, the Journal of Food Protection®, is a refereed monthly publication. Each issue contains scientific research and authoritative review articles reporting on a variety of topics in food science pertaining to food safety and quality. The Journal is internationally recognized as the leading publication in the field of food microbiology with a readership exceeding 11,000 scientists from 70 countries. The Journal of Food Protection® is indexed in Index Medicus, Current Contents, BIOSIS, PubMed, Medline, and many others.

    Print and online subscriptions are available to Members and Institutional subscribers. Online visitors who are not IAFP Members or journal subscribers will be charged on a pay-per-view basis. Information can be obtained by calling +1 800.369.6337; +1 515.276.3344; fax: +1 515.276.8655, E-mail: or Web site:
  • Information for Authors
  • Submit a Paper
  • Subscribe to this Title
  • Membership Information
  • Information for Advertisers
  • ingentaconnect is not responsible for the content or availability of external websites
Related content



Share Content

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more