DIAGNOSTIC REACTIONS 



301 



of course, also be negative, but in these the diagnosis can usually be 

 made by direct demonstration of the spirochete with the microscope. 

 With the limitations just set forth a diagnosis of syphilis can be 

 reached by means of the Wassermann reaction in over 90 per cent, 

 of the cases taken at random, the different types giving different 

 values, as shown in the accompanying table, which is taken from 

 Noguchi. The values given were obtained with the Noguchi system, 

 i. e., with an antihuman hemolytic system, but represent practically 

 what the method furnishes which we have described above. 



NOGUCHI SYSTEM; SYPHILIS, PARASYPHILIS, HEREDITARY SYPHILIS, AND 

 SYPHILIS SUSPECTS 



Primary syphilis 

 Secondary syphilis 

 Tertiary syphilis 

 Early latent syphilis 

 Late latent syphilis 

 Under prolonged treatment 

 Cerebral syphilis 



Tabes 



General paralysis 

 Hereditary syphilis 

 Syphilis 



COMPARISON OF THE WASSERMANN AND NOGUCHI SYSTEMS 



