562 Typhoid Fever 



thus liberated intracellular toxin, seems to be no improve- 

 ment upon others. 



Meyer and Bergell * prepared a serum by injecting 

 horses with a new typhoid toxin. After two years' treatment 

 they were able to demonstrate its value in curing infection 

 in laboratory animals, von Leyden f speaks in favorable 

 terms of this serum. 



t "Med. Klinik," in, No. 31, p. 917, Aug. 4, 1907. 

 * "Berl. klin. Wochenschrift," 1907, No. 18. 



