TABLE 22. 



MEAN BODY WEIGHTS AND SURVIVAL OF MICE IN THE TWO-YEAR FEED STUDIES OF 



NITROFURANTOIN 



Weeks 



on 

 Study 



Control 



Av. Wt. 



(grams) 



No. of 

 Survivors 



1,300 ppm 



2,500 ppm 



Av. Wl. Wt. (percent of No. of Av. Wt. Wt. (percent of No. of 

 (grams) controls) Survivors (grams) controls) Survivors 



MALE 



50 

 50 

 50 

 50 

 50 

 50 

 50 

 50 

 50 

 50 

 49 

 49 

 49 

 49 

 49 

 49 

 49 

 49 

 49 

 49 

 49 

 49 

 48 

 48 

 48 

 48 

 48 

 48 

 47 

 46 

 44 

 4:i 

 42 

 ,18 



50 

 50 

 50 

 50 

 50 

 50 

 50 

 50 

 50 

 50 

 50 

 50 

 50 

 50 

 50 

 50 

 50 

 50 

 50 

 50 

 50 

 50 

 50 

 50 

 50 

 .50 

 50 

 .50 

 50 

 49 

 49 

 47 

 44 

 42 

 40 



Nitrofurantoin, NTP TR 341 



52 



