1923] Kcssel: Experimental Infection of Rats and Mice 413 



3. Of the eleven rats that became infected with E. dysenteriae 

 (see also table 4), four died between the time of the last feeding, 

 Januan,^ 17, and June 12. 



TABLE 1 

 Results Obtained from Feeding Eats with Cysts of Endamobba dysenteriae 



4. For the most part no tendency to diarrhoea was noticed among 

 the rats; on the contrary the faeces were harder than normal, thus 

 showing a condition of constipation. 



5. The four rats that died gradually became thin and the hair 

 was rufiSed several days before death. An intestinal ulcer was found 

 in the colon of No. 8 while in Nos. 10, 11, and 62 no lesions were 

 found, though a mucoid condition was noticeable. In each ease there 



