THE CLASSIFICATION OF BACTERIA 119 



V. Grow very poorly, or scarcely at all at room temperatures. 



8. Bact, SEgyptium Trevisan. 



VI. Occupying a rather nondescript place in Class I, is 



9. Bact. abortivum. 



i. Bact influenzae (Pfeiffer) Lehmann- Neumann 



Bacillus of influenza PfeJffer: Detffsche med. Wochensch., 1892, 28. 

 Bact. influenza Lehmann-Neumann : Bak. Diagnostik, 1896, 187. 



Morphology. Bacilli small, slender, commonly in twos; stain with Loffler's 

 alkaline blue and carbol-fuchsin. Decolorized by Gram's method. 



On agar moistened with blood there develop in 24-48 hours small glassy 

 drops ; older colonies show a yellowish-brownish centre. 



Nastiukow's solution.^ In 24 hours at 37 small white flecks at bottom of tube, 

 composed of chains of bacilli. 



Nastiukow's agarl Colonies small gray points ; microscopically, round, yel- 

 low, translucent. 



Pathogenesis. Intraperitoneal injections of one-third of an agar slant culture 

 cause death. Intravenous injections into rabbits cause fever and muscular 

 weakness ; subcutaneous injections, knotty thickenings and suppuration. 



Habitat. Nasal and bronchial secretions, urine, of man affected with influenza. 



2. Bact. pseudoinfluenzae (Kruse) 



Pstudoinfluenza Bacillus R. Pfeiffer: Zeitsch. f. Hygiene, XIII, 1893, 3%3' 

 Bacillus pseudoinfluenzce Kruse: Fliigge, Die Mikroorganismen, 1896. 



Like the preceding, but rods somewhat longer than those of true influenza. 

 Pathogenesis. Doubtful. 



Habitat. From bronchopneumonia, otitis-media ; also associated with in- 

 fluenza. 



3. Bact. acuminatum (Sternberg) 



Babes, no name : Sept. Prozesse d. Kindesalters, Leipzig, 1889. 



C. septicus-acuminatus Sternberg : Manual of Bacteriology, 1892, 472. 



Morphology. Bacilli with pointed ends, resembling those of mouse septicaemia, 



but rather thicker ; stain unevenly. 

 Gelatin colonies. Small, round, flat, translucent ; by coalescence a yellowish 



layer. 



l Centralblatt f. Bakteriol., XVII, 492. 



