Research

COMPLETED RESEARCH

Final report submitted on Sunday, September 1, 2002

This project determined the antimicrobial activity of different levels of protamine, a natural antimicrobial, on Salmonella, E. coli and Listeria monocytogenes on meat and poultry before and after cooking.

Final report submitted on Monday, April 1, 2002

Probiotic bacterium (Lactobacillus acidophilus; NPC 747 and NPC 750) was added to cattle feed to determine its effect on the elimination or reduction of E. coli O157:H7 in cattle. The probiotic bacterium significantly decreased the number of cattle shedding E. coli O157:H7, and had either no effect or slightly improved the feedlot performance of finishing beef steers.

Final report submitted on Monday, April 1, 2002

This research evaluated a specific bacteriophage treatment intended to reduce the probability of infection with E. coli and/or the amount shed if an infection was present. The bacteriophage treatment was not effective in reducing shedding of E. coli O157:H7 in calves. A “Trojan calf” model was developed which showed that all animals that come in contact with an animal shedding E. coli in a confined space will test positive.  

Final report submitted on Monday, April 1, 2002

Pediocin, a natural antimicrobial, was evaluated as a topical treatment for finished ready-to-eat products to determine if it will retard Listeria monocytogenes growth. The results indicated that the pediocin significantly reduced the number of Lm on packaged frankfurters and delayed growth of the remaining cells during storage.

Final report submitted on Monday, April 1, 2002

This research identified optimal methods to test for the presence of Salmonella spp. on the hides, carcasses and feces of cattle.

Final report submitted on Saturday, September 1, 2001

A review of the scientific literature on the survival of pathogenic foodborne bacteria during the cooling of heat-treated, ready-to-eat meat and poultry products and the thawing of frozen raw meat and poultry products.

Final report submitted on Tuesday, August 1, 2000

This study determined what were the most reliable methods for detection of Listeria spp. and Listeria monocytogenes in RTE products and if RTE meat products could be composited into analytical units greater than 25g as a means of reducing the labor and cost.

Final report submitted on Tuesday, February 1, 2000

This project conducted a national survey of temperatures of processed meat products at retail and upon arrival at home, after shopping. Data from this study was used in the FDA/USDA Risk Assessment for Listeria monocytogenes.

Final report submitted on Tuesday, February 1, 2000

A study conducted in 12 beef slaughtering plants validated the feasibility of testing carcasses as an alternative to testing ground beef in production and distribution channels. The incidence of E. coli O157:H7 on carcasses was reduced by the slaughter process and application of microbial intervention steps.

Final report submitted on Friday, October 1, 1999

A review of the scientific literature on the role of various intervention strategies on the control of Listeria monocytogenes in processed meats.