1.0 



0.9- 



> 0.8 

 > 



z> 



0.7 



o 



^ 6 

 CD 



< 



CD 



o 

 a: 

 a. 0.5 



0.4 



O.J 



MALE MICE 



 Control 

 O 1300 ppm 

 A 2500 ppm 



— r- 

 15 



30 



— I — 

 45 



60 



WEEKS ON STUDY 



— I — 



75 



— I — 

 90 



105 



120 



45 60 75 



WEEKS ON STUDY 



120 



FIGURE 12. KAPLAN-MEIER SURVIVAL CURVES FOR MICE FED DIETS 

 CONTAINING NITROFURANTOIN FOR TWO YEARS 



55 



Nitrofurantoin, NTP TR 341 



