Pathogenesis 463 



The subject of complement deviation as a proof of the specific 

 nature of the organism is still under consideration. Bordet and 

 Gengou found that the serum of convalescent patients fixed com- 

 plement when applied to the baciUi; Frankel and WoUstein,* that 

 it did not. It is claimed by Bordet and Gengou that the difference 

 in results came about through the employment of different culture- 

 media in performing the complement fixation tests. 



* "Journal of Exp. Med.," igog, xi, 41. 



