Document Detail

Time of Aspergillus flavus infection and aflatoxin formation in ripening of figs.
MedLine Citation:
PMID:  7935736     Owner:  NLM     Status:  MEDLINE    
Figs in an orchard were inoculated with an aflatoxigenic Aspergillus flavus strain in two ways by spore injection or by dusting at three maturation stages: firm ripe, shrivelled, and dried. Fruits were individually examined for fungal development and analyzed for aflatoxin B1 (AF B1) after 2, 4, 6, 8 and 10 days. Fruit injected at the first stage showed fungal development and AF B1 contamination within two days. The toxin level increased sharply to 1 ppm after 10 days. The mean level of AF B1 (284.75 ng/g) was significantly higher than those observed in other conditions. Figs dusted at the first stage showed only a tiny fungal growth even after 10 days. AF B1 appeared after 6 days with a low frequency (35%), mean level (7.6 ng/g) and a great variation among figs (0.22-15 ng/g). Among fruits inoculated during the shrivelled fig and dried fruit stages, no fungal growth was observed and AF B1 was detected with a lower incidence in association with low mean levels (less than 1.25 ng/g). Methods of prevention of aflatoxin contamination at the critical step, the firm ripe stage, are discussed.
H Boudra; J Le Bars; P Le Bars; J Dupuy
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Mycopathologia     Volume:  127     ISSN:  0301-486X     ISO Abbreviation:  Mycopathologia     Publication Date:  1994 Jul 
Date Detail:
Created Date:  1994-11-01     Completed Date:  1994-11-01     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7505689     Medline TA:  Mycopathologia     Country:  NETHERLANDS    
Other Details:
Languages:  eng     Pagination:  29-33     Citation Subset:  IM    
Station de Pharmacologie-Toxicologie, Institut National de la Recherche Agronomique, Toulouse, France.
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MeSH Terms
Aflatoxin B1 / analysis,  biosynthesis*
Analysis of Variance
Aspergillus flavus / growth & development*,  metabolism
Food Microbiology*
Fruit / microbiology*,  physiology
Reg. No./Substance:
1162-65-8/Aflatoxin B1

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

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