Document Detail


Fate of Staphylococcus aureus in whey, whey cream, and whey cream butter.
MedLine Citation:
PMID:  2628438     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Fresh Cheddar cheese whey was inoculated with ca. 10(6) Staphylococcus aureus/ml and held at 4, 25, and 37 degrees C for 48 h. Numbers of staphylococci decreased in whey at 25 and 37 degrees C and decreased or remained constant in whey at 4 degrees C. When Cheddar cheese whey was neutralized with sodium hydroxide before inoculation with ca. 10(2) or 10(6) S. aureus/ml, numbers of the bacterium increased at all incubation temperatures. Viability of S. aureus strains in whey butter made from inoculated whey cream (from Cheddar cheese whey) was determined. Whey cream was either neutralized to a titratable acidity of .15% or untreated before inoculation with ca. 10(4) S. aureus/ml. Butter churned from the whey cream was held at 4, 25, and 30 degrees C for up to 4 wk. Viability of S. aureus was enhanced in lightly salted (1%) whey cream butter and in butter made from neutralized whey cream. Strains of S. aureus did not survive in unsalted or in salted (1.5%) butter made from untreated whey cream.
Authors:
M I Halpin-Dohnalek; E H Marth
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Journal of dairy science     Volume:  72     ISSN:  0022-0302     ISO Abbreviation:  J. Dairy Sci.     Publication Date:  1989 Dec 
Date Detail:
Created Date:  1990-04-17     Completed Date:  1990-04-17     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  2985126R     Medline TA:  J Dairy Sci     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  3149-55     Citation Subset:  IM    
Affiliation:
Department of Food Science, University of Wisconsin-Madison 53706.
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MeSH Terms
Descriptor/Qualifier:
Animals
Butter
Colony Count, Microbial
Dairy Products*
Food Microbiology*
Hydrogen-Ion Concentration
Staphylococcus aureus / growth & development*
Temperature
Chemical
Reg. No./Substance:
8029-34-3/Butter

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


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