2003 年 2003 巻 Suppl3 号 p. 159-165
Fumonisin B1 (FB1) is the most abundant of the fumonisin mycotoxins, mainly produced on maize by the Fusarium species (F. verticillioides and F. proliferatum). A previous study on fumonisin contamination of maize harvested in Mazandaran and Isfahan Provinces in Iran during 1998 demonstrated a high level of fumonisin contamination in the maize from Mazandaran Province. This study was done to confirm the high FB1 levels found in maize of Mazandaran Province, to further investigate annual variations in levels of contamination and to verify if there is any risk for the population with regard to presence of FB1 in corn. Contamination of maize with FB1 was assayed in healthy corn samples collected from Mazandaran Province during 2000. In Mazandaran Province, the mean level of FB1 in maize harvested during 2000 (5.67mg/kg) was higher than that found during 1999 (3.18mg/kg, maximum level 7.7mg/kg), with a maximum observed level of 13mg/kg in 2000. These results confirm the relatively high levels of FB1 contamination in Mazandaran Province as opposed to the much lower levels found in Isfahan Province, as were previously noted for the 1998 and 1999 harvests. But, exposure assessment study showed that there is no risk for both urban and rural populations regarding presence of FB1 in healthy corn of Mazandaran and Isfahan Provinces.
