Tags: Disease.
Yushō disease (油症) (literally oil symptoms) was a mass poisoning by polychlorinated biphenyls (PCBs) which occurred in northern Kyūshū Japan in 1968. In January 1968 rice bran oil produced by Kanemi Company in Kyushu started to become contaminated with PCBs and polychlorinated dibenzofurans (PCDFs). The contaminated rice bran oil was then sold to poultry farmers for use as a feed supplement and to consumers for use in cooking.