THE COLON-TYPHOID GROUP 93 



human infants. They arc described with B. bulgaricus, 

 with which Rodella thinks them identical (see p. 189). 



B. coli anaerogenes, an organism of the coli-type, but 

 producing no gas in the fermentation reactions. Is 

 distinguished from B. typliosus by its production of acid 

 in lactose media and by agglutination reactions. 



B. acidi lactici (pp. 188 and 108) is occasionally patho- 

 genic. 



The Capsulated Bacilli. 



B. pneumonice, or Friedlander's pneumo-bacillus (see 

 p. 143). 



B. lactis aerogems, found in the bowels of nurslings 

 and sometimes in souring milk, is non-motile, does not 

 ferment dulcitol, and gives the Voges-Proskauer reaction. 

 In gelatin a projecting ' nail-head ' growth is formed, and 

 milk is usually curdled more rapidly than with B. coli, 

 with the formation of capsules. It is sometimes patho- 

 genic. 



A short capsulated bacillus has been described in rhino- 

 scleroma, which is Gram-negative, does not liquefy 

 gelatin, and does not curdle milk. 



Several organisms have been described in ozsena (foetid 

 atrophic rhinitis), one of which Abel's B. ozcence is 

 capsulated, and causes the atrophy of the mucous mem- 

 brane. 



Bacillus Enteritidis (Gartner). 



Morphology. An actively motile bacillus, with shape 

 and size similar to those of the typhoid bacillus, carries 

 several flagella, forms no spores, and is Gram-negative. 



Cultural Characters. Ferments glucose, laevulose, mal- 

 tose, galactose, arabinose, raffinose, mannite, sorbite, 

 dulcite and dextrin, with production of acid and gas. 

 Has no action on saccharose, salicin (as a rule), nor 

 glycerin (as a rule). It is generally regarded as without 

 action on lactose, but some strains attack it. Neutral 

 red is reduced with production of yellowish fluorescence. 

 Milk is not curdled. In litmus milk in the first day a 

 slight acidity develops which is replaced by a permanent 

 alkalinity. The bacillus gives very little or no indole, 

 and does not give the Voges-Proskauer reaction. Identi- 

 fication as the cause of disease may be shown as in the 



