524 APPLICATION OF METHODS OF BACTERIOLOGY 



It is actively motile, especially in the comma stage 

 though the long spiral forms also possess this property. 



Grouping. — As found in the slimy flakes in the intes- 

 tinal discharges from cholera patients, Koch likens its mode 



Fig. 88 



,)'\,I,(iV''a'| 



"/I 



Microspira comma. Impression cover-slip from a colony thirty-four 

 hours old. 



of grouping to that seen in a school of small fish when 

 swimming up stream — i. e., they all point in nearly the 



Fig. 89 

 B. 



■' . \ ' f : , 

 ' Vi.' " ' ,*' r *^ 



«''" - ■' ' '' ,y 



Involution-forms of microspira comma, as seen in old cultures. 



same direction, and lie in irregularly parallel, linear groups 

 that are formed by one comma being behind the other with- 

 out being attached to it. 



On cover-slip preparations made from cultures in the 



