402 THOMPSON YATES LABORATORIES REPORT 
Rabbit B, first fed January 10. 
January 15. Ill ; quiet ; temperature not raised ; diarrhoea. 
,, 16. Very quiet ; diarrhoea increasing. 
„ 17. Violent diarrhoea ; temperature subnormal. 
,, 18. Died at 9.30 a.m. 
,, 18. Autopsy at once. Peritoneum normal ; swelling of lymphatic 
follicles of ileum greater than in rabbit A ; spleen not 
swollen. 
Cultures : As in rabbit A. 
Both rabbits evidently succumbed to a toxaemia. The diarrhoea was con- 
tinuous and seemed to exhaust the strength of the rabbits, as it did that of the 
patient. Bacillus ' L ' was recovered, as in the case of the patient, from urine and 
faeces. 
Serum Reaction of Immunized Animals 
Two guinea-pigs were immunized by intraperitoneal inoculation with increasing 
doses of Bacillus 'L.' The effects of the serum of one of these upon a number of 
bacilli, as compared with the effects of the sera of guinea-pigs immunized against 
other organisms, are shown in the following table. 
