Relation of the Organisms to One Another 453 



seen. These are of the same diameter throughout, and usually con- 

 tain deeply staining bodies, sometimes round, oftener in bands. 

 Most of the filaments are made in the strings of bacilli, but some 



Fig. i6i. — Bacillus fusiformis. Smear from gum in normal mouth. 

 TunniclifE in "Journal of Infectious Diseases.") 



(Ruth 



stain uniformly. Tunnicliff found that about the fourth or fifth 

 day the spirals made their appearance, sometimes in enormous 

 numbers. As a rule, they stained uniformly, some showed the 



Fig. 162. — Bacillus fusiformis. Pure culture grown forty-eight hours anae- 

 robically on Loffler's blood-serum. (Ruth Tunnicliff in "Journal of Infectious 

 Diseases.") 



dark bodies seen in the bacilli and filaments. They had from one 

 to twenty turns, which were not uniform. The spirals were flexible, 

 the ends pointed. The spirals persisted in the cultures, at times 

 for fifty-five days. Krumwiede and Pratt never found spirals in 

 their cultures. 



