Detection of Ochratoxin A, Citrinin and Sterigmatocystin from Storaged Riceby Natural Occurrence of Penicillium viridicatum and Aspergillus versicolor

Mycotoxins contamination was investigated on molds infected brown rice during longterm storage in warehouse under natural condition. The results showed that sterigmatocystin (50ppb, 450ppb), ochratoxin A (430ppb, 230ppb), and citrinin (1, 130ppb, 700ppb) were detected simultaneously in same samples.On the samples detected mycotoxins, it was found that its presence were dependent upon the infection of Pen. viridicatum and Asp. versicolor on rice grains which were limited in Hokkaido at present, and this case was also first in our country.Pen. viridicatum produced ochratoxin A and citrinin, and Asp. versicotor produced sterigmatocyetin. Detection of Pen. viridicatum having productivity of ochratoxin A and citrinin like this. Natural contamination case of ochratflxin A and citrinin in cereal grains by this species was the same.Therefore, productivity of ochratoxin A and citrinin by Pen. viridicatum was studied.