A survey on the number of animals used in experiments including bioassay, diagnosis, education and preparation of biological agents such as vaccines between April 1975 and March 1976 was conducted by the support of a grant-in-aid for the specific research, “Purification and Development of Experimental Animals”, from the Ministry of Education, Science and Culture of Japan. Of 933 universities, institutes, hospitals, testing laboratories and companies, 648 replies were received. As shown in the table, a total of 57, 107, 553 animals were used for various experiments in Japan in 1975. The distribution of the number to animal species is also shown in the table. Comparing with the similar surveys in 1956, 1960, and 1970 (
Exp. Anim., 7, 3-8, 1958, 12, 145-168, 1963, and 22, 307-340, 1973), the number of animals used in Japan seems to have reached a roughly constant level. Periodic surveys should be continued as a nation wide project for medical and biological sciences.
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