Navigation Links
Does grilling kill E. coli O157:H7?
Date:6/28/2011

This release is available in Spanish.

Top sirloin steaks have been getting a grilling in U.S. Department of Agriculture (USDA) food safety studies. USDA microbiologist John B. Luchansky and his colleagues are conducting experiments to help make sure that neither the foodborne pathogen Escherichia coli O157:H7 nor any of its pathogenic relatives will ruin the pleasure of eating this popular entre.

The scientists are learning more about the movement of E. coli into "subprimals," the meat from which top sirloin steaks are carved. Their focus is on what happens to the E. coli when subprimals are punctured-as part of being tenderized-and the effect of cooking on survival of those microbes.

Luchansky is with USDA's Agricultural Research Service (ARS), based at the agency's Eastern Regional Research Center in Wyndmoor, Pa. ARS is the USDA's principal intramural scientific research agency.

In early studies, the researchers applied various levels of E. coli O157:H7 to the "lean-side" surface of subprimals, ran the meat (lean side up) through a blade tenderizer, and then took core samples from 10 sites on each subprimal, to a depth of about 3 inches. In general, only 3 to 4 percent of the E. coli O157:H7 cells were transported to the geometric center of the meat. At least 40 percent of the cells remained in the top 0.4 inch.

Next, the group applied E. coli to the lean-side surface of more subprimals, put the meat through a blade tenderizer, then sliced it into steaks with a thickness of three-fourths of an inch, 1 inch, or 1.25 inches. Using a commercial open-flame gas grill, they cooked the steaks-on both sides-to an internal temperature of 120 degrees Fahrenheit (very rare), 130 degrees F (rare), or 140 degrees F (medium rare).

The findings confirmed that if a relatively low level of E. coli O157:H7 is distributed throughout a blade-tenderized top sirloin steak, proper cooking on a commercial gas grill is effective for eliminating the microbe.

Luchansky conducted the studies with Wyndmoor colleagues Jeffrey E. Call, Bradley A. Shoyer, and Anna C.S. Porto-Fett; Randall K. Phebus of Kansas State University; and Harshavardhan Thippareddi of the University of Nebraska.

Published in the Journal of Food Protection in 2008 and 2009, these preliminary findings have paved the way to newer investigations. The research enhances food safety, a USDA top priority.


'/>"/>

Contact: Marcia Wood
marcia.wood@ars.usda.gov
301-504-1662
United States Department of Agriculture - Research, Education and Economics
Source:Eurekalert

Post Your Comments:
*Name:
*Comment:
*Email:
(Date:1/26/2017)... , Jan. 26, 2017  Crossmatch, a leading ... a new solution aimed at combatting fraud, waste and ... was introduced at the Action on Disaster Relief conference ... meeting point for UN agencies and foreign assistance organizations ... Fraud, waste and abuse are a largely unacknowledged problem ...
(Date:1/24/2017)... 2017  It sounds simple and harmless—an electronic ... vital signs and alerts parents on their smart ... level drops. But pediatric experts argue that such ... no evidence of medical benefits, especially to healthy ... to parents of healthy babies, promising peace of ...
(Date:1/19/2017)... 2017 Sensory Inc ., a ... for consumer electronics, and i nnerCore ... cybersecurity solutions, today announced a global partnership that ... worldwide to bolster security of data sensitive mobile ... authentication platforms they offer, innerCore now offers its ...
Breaking Biology News(10 mins):
(Date:2/21/2017)... PARK, CA (PRWEB) , ... February 21, 2017 ... ... of the VTX-1 Liquid Biopsy System , a fully automated benchtop system ... microfluidic technology. The VTX-1 is being launched at the Molecular Medicine Tri Conference ...
(Date:2/21/2017)... ... February 21, 2017 , ... Cancer diagnostics workflow ... joined its executive team to lead the development and commercialization of its Cancer ... improve the diagnosis and treatment of cancer. The CIDT addresses the need for ...
(Date:2/21/2017)... Chicago, IL (PRWEB) , ... ... ... launch of the Life -Sciences division, Treximo will pair its $200M operational ... class, results-based consulting and project management in areas affecting quality and operational ...
(Date:2/21/2017)... ... February 21, 2017 , ... Creation Technologies, a ... for original equipment manufacturers (OEMs) , today announced it has received the ‘Highest ... year winning in its category of electronics manufacturing services (EMS) providers with annual ...
Breaking Biology Technology: