Author:
Bearns Ronald E.,Girard Kenneth F.
Abstract
Using the so-called holding technique of pasteurization (61.7 °C., 35 minutes) it was shown that when known numbers of viable Listeria monocytogenes are added to samples of fresh sterile milk, organisms may be recovered whenever the initial number of bacteria added is 5 × 104/ml. or greater. No significant differences in heat resistance among representatives of various Listeria monocytogenes was observed. After 48 hours at room temperature (22 °C.) survivors multiply in such "pasteurized" milk and viable bacterial counts reach 108 per ml. without producing any grossly detectable changes in the milk or suspicious odors.
Publisher
Canadian Science Publishing
Subject
Genetics,Molecular Biology,Applied Microbiology and Biotechnology,General Medicine,Immunology,Microbiology
Cited by
69 articles.
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