PATHOGENIC BACTERIA AND DISEASES 57 



to syphilis is the anthropoid ape, so that infection is 

 always from individual to individual or is inherited, 

 that is, from mother to child, or father to child. 



Spirillum of Relapsing Fever. A motile spirillum 

 with flagella, the cause of a recurrent or intermittent 

 fever. It is found in the blood of patients suffering from 

 the disease, but only during the period of fever. After 

 the attack the spirilla congregate in the spleen and finally 

 die there. 



The agglutination test is positive. The germ is path- 

 ogenic to man and monkeys, and is transmitted by the 

 bite of the bed-bug. 



