Fig. 64. a. Treponema paUiditm, Reiter strain. The polar structures on 

 tliese spirochetes are commonly referred to as terminal filaments and may 

 not be flagella. 



b. Treponema sp., Oral type, Hampp. The upper organism has a single 

 subpolar flagellum. Connecting the two organisms is a filament probably of 

 the same nature as the terminal filament on the lower organism. 



c, d. T. pallidum, Reiter strain. Characteristic subpolar multitrichous flag- 

 ellation. In c is shown this type of flagellation particularly well. 



a-d. From E. Leifson, /. Bacterial. 62, 377-389 ( 1951 ). 



151 



