The Ames test is a rapid and sensitive in vitro technique for detectin
g mutagens by using Salmonella typhimurium hypersensibilized strains.
We applied this assay to the study of smoker's urine mutagenicity. Eig
hteen smokers and 18 non-smokers were investigated, Statistical analys
is showed a significant increase of the smoker's urine mutagenicity. T
he Ames rest could be used to determine the mutagenicity level of smok
ers. Moreover, the results suggest the applicability of the Ames test
to urines of ex-smokers and passive smokers.