Preview
Sign-in for full Details 
Sign-in free and Explore the Exciting World of BiomedExperts:
- Over 1.500.000 Profiles
- More than 1.800 Organizations worldwide
- State of the Art Network Visualizations
- Manage your own Profile
- Locate Experts in your Country/Region
- Locate Experts in your 1. and 2. Level Network
- Connect to Experts Worldwide
find experts for
Sign-in to see more
2009:
Taormina Peter J; Beuchat Larry R; Erickson Marilyn C; Ma Li; Zhang Guodong; Doyle Michael P
Transfer of Escherichia coli O157:H7 to iceberg lettuce via simulated field coring.
Journal of food protection 2009;
72(
3):.
The field-core (cut and core) harvesting technique used for iceberg lettuce was evaluated as a potential means of cross-contamination with Escherichia coli O157:H7. Chlorinated water treatment was evaluated for its efficacy in removing or inactivating the pathogen on the blade portion of the field coring device and on cored lettuce. Field coring devices inoculated by immersing blades in soil containing E. coli O157:H7 at 3.74 or 6.57 log CFU/g contained 3.13 and 4.97 log CFU per blade, respectively. Treatment of inoculated field coring device blades by immersing in chlorinated water (200 microg/ml total chlorine) for 10 s resulted in a reduction of 1.56 log CFU per blade, which was 1.42 log CFU per blade greater than that achieved using water, but insufficient to eliminate the pathogen on blades. Field coring devices inoculated by contacting soil containing E. coli O157:H7 at 2.72 and 1.67 log CFU/g, then repeatedly used to cut and core 10 lettuce heads, transferred the pathogen to 10 and 5 consecutively processed heads, respectively. Lettuce cores remained positive for the pathogen after spraying with 100 microg/ml free chlorine for 120 s at 2.81 kg/cm2 (40 lb/in2), regardless of the inoculum level. The number of E. coli O157:H7 recovered from inoculated lettuce cores treated for 10 s with chlorine was significantly (P < or = 0.05) different from the number recovered from tissues treated with water. Dipping contaminated field coring devices in chlorinated water may not be effective in killing the pathogen and controlling cross-contamination from head to head. Spraying contaminated lettuce with chlorinated or untreated water reduces but does not eliminate E. coli O157:H7.
Post to CiteULike 
Sign in free and see...
Visualized networks:
See your personal network in
sophisticated graphical views
GeoTargeted Searches:
Locate experts around the world
and connect with global collaborators
Research Profiles:
See the visualized research activity
of experts around the globe
Sign-in to see more
