228 Chapter VIII 



ohermeyeri of recurrent fever. We know, from what has been said in 

 Chapter VI, that the spirochaetes found in the serum of persons 



Fig. 40. Vibrios (F. metcTinikovi) developed inside 

 a microphage from a vaccinated guinea-pig. 



Fig. 41. Vibrios (F. metchniJcovi) developed in a drop of exudation 



from a vaccinated guinea-pig. The vibrios have ruptured the 



microphage and scattered themselves in the fluid. 



attacked by this organism, are, in the peritoneal cavity of guinea- 

 pigs, destroyed by the intervention of the macrophages. These 

 [240] phagocytes guarantee the natural immunity of the guinea-pig against 



