NITTA Yumiko    Department   Hiroshima shudo University  The Faculty of Health Sciences    Position   Professor
Date	2018/03/12
Presentation Theme	An accessment of environmental Cadmium (Cd) by wild boar and raccoon dog
Conference	14th World Congress on Toxicology and Pharmacology
Promoters	Toxicology congress 2018
Conference Type	International
Presentation Type	Speech (General)
Contribution Type	Individual
Venue	Singapore
Publisher and common publisher	◎Nitta Y.
Details	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.