3. BACTERIAL MUTATION ASSAY
The substance Unikiller was examined for mutagenic activity in four histidine dependent auxotrophs of Salmonella typhimurium, strains TA98, TA100, TA1535 and TA1537, and one tryptophan dependent auxotroph of Escherichia coli, strain WP2uvrA, using pour-plate tests.
The tests, which were conducted in the presence and absence of an activating system derived from rat liver(S9 mix). employed a range of concentrations of Unikiller up to 5000㎍/plate. All tests included vehicle (purified water) controls with and without S9 mix.