Evaluation of the ability of primary selective enrichment to resuscitate heat-injured and freeze-injured Listeria monocytogenes cells.
Resuscitation rates of injured Listeria monocytogenes on conventional selective Listeria enrichment broth and nonselective Trypticase soy broth containing 0.6% yeast extract were compared. Cells were heated to 60 degrees C for 5 min or frozen at -20 degrees C for 7 days. Inoculation of Trypticase soy broth-yeast extract with the stressed cells resulted in growth that was superior to that in Listeria enrichment broth. Injured cells were fully recovered at 6 to 8 h.
Budu-Amoako
E
E
Prince Edward Island Food Technology Centre, Charlottetown, Canada.
Toora
S
S
Ablett
R F
RF
Smith
J
J
D002364:Caseins / Q000494:pharmacology; D003080:Cold Temperature / Q000009:adverse effects; D003470:Culture Media / Q000494:pharmacology; D005615:Freezing; D006358:Hot Temperature / Q000009:adverse effects; D008089:Listeria monocytogenes / Q000187:drug effects / Q000254:growth & development*; D011492:Protein Hydrolysates / Q000494:pharmacology
D002364:Caseins; D003470:Culture Media; D011492:Protein Hydrolysates; C026375:trypticase-soy broth