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

Brazilian Journal of Microbiology

Josefa B. Da Silva²  Paulo Dilkin¹  Homero Fonseca¹  Benedito Corrêa¹ 

[1] ,Instituto Butantan, São Paulo, SP, BrasilSão Paulo SP ,Brasil

关键词: toxigenicity;    Aspergillus flavus;    Fusarium verticillioides;    mycotoxins;    sorghum;    aflatoxin;    fumonisin;    toxigenicidade;    Aspergillus flavus;    Fusarium verticillioides;    micotoxinas;    sorgo;    aflatoxina;    fumonisina;   

DOI  :  10.1590/S1517-83822004000200002

来源: SciELO

【 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 B1 and B2 were detected by TLC, and fumonisins B1 and B2 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 µg/kg (AFB1 + AFB2), while thirty two (91%) F. verticillioides strains produced FB1 at concentrations ranging from 0.12 to 5.38 µg/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.

【 授权许可】

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