Modeling the Growth of Salmonella in Raw Poultry Stored under Aerobic Conditions

Authors: Dominguez, Silvia A.1; Schaffner, Donald W.1

Source: Journal of Food Protection®, Volume 71, Number 12, December 2008 , pp. 2429-2435(7)

Publisher: International Association for Food Protection

Key:
Free Content - Free Content
New Content - New Content
Subscribed Content - Subscribed Content
Free Trial Content - Free Trial Content

Abstract:

The presence of Salmonella in raw poultry is a well-recognized risk factor for foodborne illness. The objective of this study was to develop and validate a mathematical model that predicts the growth of Salmonella in raw poultry stored under aerobic conditions at a variety of temperatures. One hundred twelve Salmonella growth rates were extracted from 12 previously published studies. These growth rates were used to develop a square-root model relating the growth rate of Salmonella to storage temperature. Model predictions were compared to growth rate measurements collected in our laboratory for four poultry-specific Salmonella strains (two antibiotic-resistant and two nonresistant strains) inoculated onto raw chicken tenderloins. Chicken was inoculated at two levels (103 CFU/cm2 and ≤10 CFU/cm2) and incubated at temperatures ranging from 10 to 37°C. Visual inspection of the data, bias and accuracy factors, and comparison with two other published models were used to analyze the performance of the new model. Neither antibiotic resistance nor inoculum size affected Salmonella growth rates. The presence of spoilage microflora did not appear to slow the growth of Salmonella. Our model provided intermediate predicted growth rates when compared with the two other published models. Our model predicted slightly faster growth rates than those observed in inoculated chicken in the temperature range of 10 to 28°C but slightly slower growth rates than those observed between 30 and 37°C. Slightly negative bias factors were obtained in every case (−5 to −3%); however, application of the model may be considered fail-safe for storage temperatures below 28°C.

Document Type: Research article

Affiliations: 1: School of Biological and Environmental Sciences, Rutgers, The State University of New Jersey, Food Science Department, 65 Dudley Road, New Brunswick, New Jersey 08901-8520, USA

The full text electronic article is available for purchase. You will be able to download the full text electronic article after payment.

$37.00 plus tax      Refund Policy

 

OR

Back to top

Key:
Free Content - Free Content
New Content - New Content
Subscribed Content - Subscribed Content
Free Trial Content - Free Trial Content
Share this item with others: These icons link to social bookmarking sites where readers can share and discover new web pages.
Page Help Click here for Page Help
Shopping cart
Tools
Sign in






Need to register?
Sign up here
Text size: A | A | A | A