Survival, Elongation, and Elevated Tolerance of Salmonella enterica Serovar Enteritidis at Reduced Water Activity

Authors: Kieboom, Jasper; Kusumaningrum, Harshi D.; Tempelaars, Marcel H.; Hazeleger, Wilma C.; Abee, Tjakko; Beumer, Rijkelt R.

Source: Journal of Food Protection®, Volume 69, Number 11, November 2006 , pp. 2681-2686(6)

Publisher: International Association for Food Protection

Buy & download fulltext article:

Price: $37.00 plus tax (Refund Policy)

Abstract:

Growing microorganisms on dry surfaces, which results in exposure to low water activity (a_w), may change their normal morphology and physiological activity. In this study, the morphological changes and cell viability of Salmonella enterica serovar Enteritidis challenged to low a_w were analyzed. The results indicated that exposure to reduced a_w induced filamentation of the cells. The amount of filamentous cells at a_w 0.94 was up to 90% of the total number of cells. Surviving filamentous cells maintained their membrane integrity after exposure to low a_w for 21 days. Furthermore, cells prechallenged to low a_w, obtained with an ionic humectant, demonstrated higher resistance to sodium hypochlorite than control cells. These resistant cells are able to survive disinfection more efficiently and can therefore cause contamination of foods coming in contact with surfaces. This points to the need for increased attention to cleaning of surfaces in household environments and disinfection procedures in processing plants.

Document Type: Research article

Affiliations: 1: Laboratory of Food Microbiology, Department of Agrotechnology and Food Sciences, Wageningen University, P.O. Box 8129, 6700 EV Wageningen, The Netherlands

Publication date: 2006-11-01

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: info@foodprotection.org or Web site: www.foodprotection.org
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

Survival, Elongation, and Elevated Tolerance of Salmonella enterica Serovar Enteritidis at Reduced Water Activity

Buy & download fulltext article:

Tools

Key

Text size:

Useful pages