Abstract
At present no mammalian test system which meets the toxicological requirements is available for routine testing of mutagenicity. Therefore, emphasis should be laid primarily on basic research in this area and not on large-scale screening of possible mutagens with methods known to be inadequate in many respects, if mutagenicity is a major hazard to man, a view certainly not shared by all toxicologists. Furthermore, if carcinogenicity is based on a mutagenic event occurring in somatic cells, the well established tests for carcinogenicity would provide a better way for evaluating irreversible somatic mutations than the tests now suggested for mutagenicity testing. In the present situation a drastic reduction of the noxes men are exposed to would be the most reliable means of preventing a toxicological disaster. We are still in the situation of continuously performing “mass human experiments” and detecting hazards only after considerable harm has been done. Consequently, the goal must be neither to expose a considerable proportion of our population to environmental hazards nor to give drugs to thousands or even millions of healthy people for any reasons whatsoever, unless test systems are available which would allow effective prevention of disaster.
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