Combining organic acid treatment with steam pasteurization to eliminate Listeria monocytogenes on fully cooked frankfurters.
An organic acid solution of 2% acetic, 1% lactic, 0.1% propionic, and 0.1% benzoic acids was combined with steam surface pasteurization to treat frankfurters during vacuum packaging to eliminate potential postcook contamination with Listeria monocytogenes. The thermal lethality of L. monocytogenes from steam was evaluated at an inoculation concentration of 1 to 6 log CFU/cm2. About 3-log reductions of L. monocytogenes were achieved when frankfurters were treated by steam for 1.5 s. Combining organic acid treatment with steam pasteurization further inhibited the growth of surviving L. monocytogenes cells for 19 and 14 weeks when the packaged frankfurters were stored at 4 and 7 degrees C, respectively. The results from this study provide meat processors with useful information for controlling L. monocytogenes on ready-to-eat meats.
Murphy
R Y
RY
Alkar-RapidPak, Inc., Lodi, Wisconsin 53555, USA. rong.murphy@alkar.com
Hanson
R E
RE
Johnson
N R
NR
Chappa
K
K
Berrang
M E
ME
D019342:Acetic Acid / Q000494:pharmacology; D000143:Acids / Q000494:pharmacology*; D000818:Animals; D019817:Benzoic Acid / Q000494:pharmacology; D015169:Colony Count, Microbial; D003257:Consumer Product Safety; D005511:Food Handling / Q000379:methods; D005516:Food Microbiology; D005519:Food Preservation / Q000379:methods*; D006801:Humans; D019344:Lactic Acid / Q000494:pharmacology; D008089:Listeria monocytogenes / Q000187:drug effects / Q000254:growth & development*; D008461:Meat Products / Q000382:microbiology*; D011422:Propionates / Q000494:pharmacology; D013227:Steam; D013997:Time Factors
D000143:Acids; D011422:Propionates; D013227:Steam; D019344:Lactic Acid; D019817:Benzoic Acid; C029658:propionic acid; D019342:Acetic Acid