296 SPECIFIC MICRO-ORGANISMS 



resembles B. diphtheria very closely, simulating the granular 

 morphological type. Its cultures are not poisonous. 



Bacillus Hofmanni. This organism is also called the pseudo- 

 diphtheria bacillus. It occurs frequently in cultures from the 

 nose and pharynx, and resembles the short solid-staining morpho- 

 logical types of B. diphtheria. It does not produce toxin, nor 

 does it produce acid from dextrose. 



The Morax-Axenfeld Bacillus. This is a small non-motile 

 diplo-bacillus, the individuals measuring about 1X2^, which 



FIG. 123. The Morax-Axenfeld bacillus in the exudate of conjunctivitis. (From 

 McFarland after Rymowitsch and Matschinsky.} 



occurs in one form of epidemic conjunctivitis. It can be cultured 

 on Loffler's serum which it liquefies, and the disease has been 

 produced in man by inoculation with pure cultures. 



The Koch-Weeks Bacillus. This a non-motile rod 0.25^ 

 wide and i to 2/z long, which occurs in epidemic conjunctivitis. 

 It is cultivated with difficulty and abundant moisture is essential 

 to success. Inoculation with pure cultures causes conjunctivitis. 



Bacillus (Bacterium) Pertussis (Bordet-Gengou Bacillus). 

 Bordet and Gengou in 1906 described a minute, non-motile 

 bacillus 0.3X1.5^ which occurs in the sputum and on the mucous 

 membrane of the trachea and bronchi in whooping cough. They 



