Production of aflatoxins by Aspergillus flavus and of fumonisins by Fusarium species isolated from Brazilian sorghum

被引：18
作者：
da Silva, JB
Dilkin, P
Fonseca, H
Corrêa, B
机构：
[1] Univ Sao Paulo, ICB, Dept Microbiol, BR-05508900 Sao Paulo, Brazil
[2] Inst Butantan, Sao Paulo, Brazil
[3] Univ Sao Paulo, Escola Super Agr Luis de Queiroz, Sao Paulo, Brazil
来源：
BRAZILIAN JOURNAL OF MICROBIOLOGY | 2004年 / 35卷 / 03期
关键词：
toxigenicity; Aspergillus flavus; Fusarium verticillioides; mycotoxins; sorghum; aflatoxin; fumonisin;
D O I：
10.1590/S1517-83822004000200002
中图分类号：
Q93 [微生物学];
学科分类号：
071005 ; 100705 ;
摘要：
Fifty-nine Aspergillus flavus and 35 Fusarium verticillioides strains, isolated from freshly harvested (10) and stored (130) Brazilian sorghum samples, were tested regarding their ability to produce aflatoxins (coconut milk agar) and fumonisins (rice culture), respectively. Aflatoxins B-1 and B-2 were detected by TLC, and fumonisins B-1 and B-2 were analyzed by HPLC. Thirty-eight (64.4%) A. flavus strains produced detectable levels of aflatoxins at concentrations ranging from 12.00 to 3282.50 mu g/kg (AFB(1)+AFB(2)), while thirty two (91%) F. verticillioides strains produced FB1 at concentrations ranging from 0.12 to 5.38 mu g/g. Two F. proliferatum strains produced low fumonisin levels. The toxigenic potential of A. flavus (64.4%) and F verticillioides (91.5%) strains observed in sorghum samples indicates that rigorous control should be directed at the storage conditions of these products to minimize contamination with toxigenic deteriorating fungi, preventing further hazard to human and animal health.
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收藏
页码：182 / 186
页数：5
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