Document Detail

The enumeration of thermotrophic types amongst the Enterobacteriaceae colonizing perishable foods.
MedLine Citation:
PMID:  3722028     Owner:  NLM     Status:  MEDLINE    
A total of 41 pure cultures of Enterobacteriaceae, comprising 32 thermotrophic and nine psychrotrophic strains, pathogens or marker organisms, were examined for numbers of colony forming units obtained at 37 degrees and 42.5 degrees C (thermotrophs) and 30 degrees C (psychrotrophs), when surface-plated on a rich infusion agar and violet red bile agar. In addition 42 food and water samples, collected in a rural area of the Philippines, were examined by surface inoculating violet red bile AIPC (agar immersion plating and contact; 'dip') slides and incubating at 37 degrees and 42.5 degrees C. At 42.5 degrees C there was almost total recovery of the thermotrophic Enterobacteriaceae, whereas the psychrotrophic strains were completely suppressed. At 37 degrees C the psychrotrophs were only slightly inhibited. The Philippine foods, predominantly cooked meals, milk and drinking water, appeared to be significantly colonized by thermotrophic Enterobacteriaceae. It is concluded that incubation at 42.5 degrees C satisfactorily selects enteropathogenic and other enteric Enterobacteriaceae while suppressing the psychrotrophic types which are mainly of vegetable origin. It is emphasized that, regardless of the temperature used, a resuscitation procedure for Enterobacteriaceae populations that have incurred sublethal injury in food has to precede counts on or in the usual selective media.
D A Mossel; H van der Zee; A P Hardon; P van Netten
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Journal of applied bacteriology     Volume:  60     ISSN:  0021-8847     ISO Abbreviation:  J. Appl. Bacteriol.     Publication Date:  1986 Apr 
Date Detail:
Created Date:  1986-07-31     Completed Date:  1986-07-31     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  7503050     Medline TA:  J Appl Bacteriol     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  289-95     Citation Subset:  IM    
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MeSH Terms
Culture Media
Enterobacteriaceae / growth & development*,  isolation & purification
Food Microbiology*
Hot Temperature
Milk / microbiology
Oryza sativa
Water Microbiology
Reg. No./Substance:
0/Culture Media

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