THERAPEUTIC IMMUNIZATION IN MAN 



491 



When patients are to be treated the principle of the treatment is 

 to inoculate them first with cords that have been dried for consider- 

 able periods, gradually proceeding toward those that have been dried 

 for less prolonged times and are therefore more virulent. The treat- 

 ment is varied in the individual case according to the severity of the 

 injury. Formerly treatment was begun with cords dried as long as 

 16 days. More recently it has been found that cords dried for longer 

 than 8 days are practically non-virulent and correspondingly lack 

 in antigenic value. They are no longer employed therefore, since 

 their use is regarded as a waste of time. The following tables taken 

 from Stimson's article in Bulletin 65 of the Hygienic Laboratory of 

 the U. S. Public Health Service give the standard methods of treat- 

 ment as recommended by the United States Public Health Service: 



Scheme for Mild Treatment 



Scheme for Intensive Treatment 



