532 Major W, J. TuUoch. Serological Types of B. tetani in 



Of this series of 100 cases, full information was available concerning 91 

 men wlio were known to have received prophylactic treatment. The serum 

 used for prophylaxis was presumably prepared mainly from growths of 

 Type I bacilli. 



A B 



lo ao 3o +o lo JO 3o 4o 

























in 





rr 







mn — 























tE 



-.Died 



Nif JS 











Fig. 1. — Declared Cases of the Disease occurring in 91 Inoculated Men. 



If the consideration be limited to those cases of the series in which 

 tetanus supervened within 14 days, the results obtained may be set forth 

 graphically as in fig. 2. 



lo ao ao 4o so 















m 





w/rmmmfii/mA 



vum/uwmmtiM 



1 — 





















iminms n 







Incidence 











Fig. 2. — Cases of Tetanus in Inoculated Men due to Types I, II and III, in which the 

 onset occurred within two weeks. Eates expressed in percentages. 



Summary. — These findings thus suggest that prophylaxis with mono- 

 typical anti-toxin may possibly result in monotypical immunity. 



