Document Detail


Inhibition of Listeria monocytogenes by piscicolin 126 in milk and Camembert cheese manufactured with a thermophilic starter.
MedLine Citation:
PMID:  12455889     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The effect of bacteriocin, piscicolin 126, on the growth of Listeria monocytogenes and cheese starter bacteria was investigated in milk and in Camembert cheese manufactured from milk challenged with 10(2) cfu ml(-1) L. monocytogenes. In milk incubated at 30 degrees C, piscicolin 126 added in the range of 512-2,048 AU ml(-1) effectively inhibited growth of L. monocytogenes for more than 20 d when challenged with approximately 10(2) cfu ml(-1) L. monocytogenes. At higher challenge levels (10(4) and 10(6) cfu ml(-1)), piscicolin 126 reduced the viable count of L. monocytogenes by 4-5 log units immediately after addition of the bacteriocin; however, growth of Listeria occurred within 24 h. The minimum inhibitory concentration (MIC) of piscicolin 126 against lactic acid cheese starter bacteria was generally greater than 204,800 AU ml(-1) , and the viable count and acid production of these starter cultures in milk were not affected by the addition of 2,048 AU ml(-1) piscicolin 126. Camembert cheeses made from milk challenged with L. monocytogenes and with added piscicolin 126 showed a viable count of L. monocytogenes 3-4 log units lower than those without piscicolin 126. Inactivation of piscicolin 126 by proteolytic enzymes from cheese starter bacteria and mould together with the emergence of piscicolin 126-resistant isolates was responsible for the recovery of L. monocytogenes in the cheeses during ripening.
Authors:
J Wan; K Harmark; B E Davidson; A J Hillier; J B Gordon; A Wilcock; M W Hickey; M J Coventry
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of applied microbiology     Volume:  82     ISSN:  1364-5072     ISO Abbreviation:  J. Appl. Microbiol.     Publication Date:  1997 Mar 
Date Detail:
Created Date:  2002-11-28     Completed Date:  2003-02-06     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9706280     Medline TA:  J Appl Microbiol     Country:  England    
Other Details:
Languages:  eng     Pagination:  273-80     Citation Subset:  IM    
Affiliation:
Australian Food Industry Science Centre, Werribee, Victoria, Australia.
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MeSH Terms
Descriptor/Qualifier:
Animals
Bacteriocins / biosynthesis,  pharmacology
Cattle
Cheese / microbiology*
Colony Count, Microbial
Culture Media
Fermentation
Food Microbiology*
Food Preservation
Listeria monocytogenes / drug effects*,  genetics,  growth & development*,  isolation & purification
Milk / microbiology*
Chemical
Reg. No./Substance:
0/Bacteriocins; 0/Culture Media; 0/piscicolin 126

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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