Document Detail

Production of ochratoxins in different cereal products by Aspergillus ochraceus.
MedLine Citation:
PMID:  5564676     Owner:  NLM     Status:  MEDLINE    
The effects of temperature and length of incubation on ochratoxin A production in various substrates were studied. The optimal temperature for toxin production by Aspergillus ochraceus NRRL-3174 was found to be around 28 C. Very low levels of ochratoxin A are produced in corn, rice, and wheat bran at 4 C. The optimal time for ochratoxin A production depends on the substrate, ranging from 7 to 14 days at 28 C. Ochratoxin B and dihydroisocoumaric acid, i.e., one of the hydrolysis products of ochratoxin A, were produced in rice but at levels considerably lower than ochratoxin A. No ochratoxin C was produced in rice at 28 C. When added to rice cereal or oatmeal, the toxin was found to be very stable over prolonged storage and even to autoclaving for 3 hr.
H L Trenk; M E Butz; F S Chu
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Applied microbiology     Volume:  21     ISSN:  0003-6919     ISO Abbreviation:  Appl Microbiol     Publication Date:  1971 Jun 
Date Detail:
Created Date:  1971-10-15     Completed Date:  1971-10-15     Revised Date:  2009-11-18    
Medline Journal Info:
Nlm Unique ID:  7605802     Medline TA:  Appl Microbiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1032-5     Citation Subset:  IM    
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MeSH Terms
Aspergillus / metabolism*
Chromatography, Thin Layer
Coumarins / biosynthesis*
Food Contamination*
Food Handling
Food Microbiology*
Mycotoxins / biosynthesis*
Ochratoxins / analysis,  biosynthesis
Oryza sativa
Time Factors
Zea mays
Reg. No./Substance:
0/Coumarins; 0/Mycotoxins; 0/Ochratoxins

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