Contamination by Aspergillus flavus and aflatoxin B1 of 20 samples of lotus seed collected at Ha Noi was investigated. The results showed that 100% of samples were contaminated with Aspergillus flavus, the mean contamination rate with Aspergillus flavus was 40%. 4/20 samples was contaminated with aflatoxin B1, the mean contamination amount was 165 ppb, ranged from 17,5 ppb to 434 ppb. The samples were contaminated with aflatoxin B1 as high as A.flavus. The samples of lotus seed collected from traditional medicine shops had the contamination by A.flavus and aflatoxin B1 higher than that taken from the markets
Seeds ; Aspergillus flavus ; Aflatoxins ; epidemiology