18 



CLINICAL BACTERIOLOGY. 



The individual bacterial cells exhibit at times a homo- 

 geneous translucent, at other times a granular protoplas- 

 mic, structure that, on the whole, possesses the properties 

 of all other protoplasmic structure, but that is not, as in 

 the cells of the higher orders of plants it is, differentiable 



10 II 



Fig. i. Various forms of bacteria: i and 2, Round and oval micrqcpcci ; 3, diplo- 

 cocci; 4, tetracocci, or tetrads; 5, streptococci; 6, bacilli; 7, bacilli in chains, the 

 lower showing spore-formation ; 8, bacilli showing spores, forming drumsticks and 

 clostridia; 9 and 10, spirilla; n, spirochetae (McFarland). 



Fig. 2. Diagram illustrating the morphology of the s 

 spirochetae (McFarland). 



of the spirilla: a, 6, c, Spirilla; d, 



Fig. 3. Diagram illustrating the morphology of the bacilli : a, , c, Various 

 of bacilli ; d, e y bacilli with flagella ; f, chain of bacilli, individuals distinct ; g> 

 of bacilli, individuals not separated (McFarland). 



us forms- 

 chain 



into a cell-nucleus and a cell-body. Nevertheless, some 

 observers consider the so-called central body in certain 

 large bacteria as the virtual nucleus, and believe the plasma 

 to have a honeycomb arrangement a view that has recently 

 been put forth also with regard to the large species of 

 spirilla. According to others, the interior of the bacterium 



