ANAPH7LAXIB IN ITS RELATION TO DISEASE 



159 



ence arc encapsulated and the active clinical symptoms disappear. 

 But, as is shown in Fig. 8, antibodies still remain in considerable 

 amount, so that any factor which would now 7 call a latent tubercular 



FIG. 8 

 Jfrm.l t 2 j 3 ,4,5,6,7,8, 



32 , 33 \t& Months 



Threshold of 

 .1 tan eons 



Threshold of 



Cutaneous 



reaction 



Symptoms of Disease 

 Diagram illustrating benign course in a case of human tuberculosis. (Taken from v. Pirquet.) 



FIG. 9 

 Days after appearance of eruption in measles 



,15 



22 24 



Death- 



Temperativre 



40-- 



Measles 



Miliary Tuberculosis 



Diagram illustrating the lighting up of a tubercular process (miliary tuberculosis) following 

 measles. (Taken from v. Pirquet.) 



focus into renewed activity, or the introduction of tuberculin from 

 without, would also call forth a prompt clinical reaction, either 

 general or local, as the case may be. Fig. 9 illustrates this very well, 

 and shows the mechanism which is called into action, when a miliary 



