134 MICRO-ORGANISMS AND DISEASE. [CHAP. 



It is motile, with a flagellum either at one or both ends ; 

 Warming occasionally saw two and three flagella at one end. 

 It is about 0'003 mm. thick ; all forms occur between such as 

 have half and such as have two and a-half turns of a spiral. 

 Lankester also saw the same kind of organism amongst his 

 peach-coloured bacteria. 1 



3. Pathogenic spirilla. 



Spirillum Obermeyeri (of relapsing fever) is morphologically 

 identical with spirillum tenue (or spirochseta plicatilis of Cohn). 



93 BLOOD OF APE INOCULATED WITH BLOOD SHOWN IN PRECEDING 

 FIGURE. 



Blood-corpuscles and spirlla. 

 Tiifvine power 700. (After Koch.) 



Magnifying power 700. (A 



It was discovered in great numbers by Obermeyer 2 in the 

 blood of the general circulation in patients suffering from 



1 Quarterly Journ. of Micr. Science, vol. xiii. New Series. 



2 Centralbl. f. meci. Wiss. 10, 1873. 



