ニッタ　ユミコ   NITTA Yumiko   新田　由美子    所属   広島修道大学  健康科学部    職種   教授
発表年月日	2018/03/12
発表テーマ	An accessment of environmental Cadmium (Cd) by wild boar and raccoon dog
会議名	14th World Congress on Toxicology and Pharmacology
主催者	Toxicology congress 2018
学会区分	国際学会
発表形式	口頭（一般）
単独共同区分	単独
開催地名	Singapore
発表者・共同発表者	◎Nitta Y.
概要	Cadmium (Cd) is one of the food contaminants. Humans eat Cd every day through crops growing on the ground polluted by heavy metals. In order to evaluate the sanitary environment of Hiroshima area, Japan, we set up a small area (<4km2) facing the Gulf of Hiroshima and measured the concentrations of Cd and Zinc (Zn) in soil and wildlife. The soil at the mouth of Ejirigwa stram in Oogi-mahci contained 0.43mg/kg of Cd. The 6 wild boar kidneyes of less than 3 years old contained 1.07±0.70 mg/kg. The concentration of Cd in the 5 raccoon dog kidneyes, on the other hand, showed varied concentrations of Cd from 0.29 to 20.60 mg/kg in a age dependent nammer. As the environment of their habitat was not so heavily contaminated with Cd, we speculated the source of long term exposure of raccoon dogs to Cd. One candidate was oyster shell. The oyster shell is one of ingredients of fertiliers processed by the system of industrial waste recycle. However, the Cd contained in oyster shells has not been paid attention to so much in Japan, because the Food Hygiene Law does not establish the standard value of Cd in oyster meat. The oyster shells at the Gulf of Hiroshima contained 0.19±0.09 mg/kg of Cd. Therefore, we think there is a link of Cd in the environment of soil, oyster shell, fertilizer, fruits and vegetables, wildlife and human, which had been missed.