NOT DESCRIBED IN PREVIOUS SECTIONS. 517 



160. CAPSULE BACILLUS OF CHIARI. 



Obtained by Chiari (1895) from a man who died from an ascending ne- 

 phritis, with endocarditis and finally meningitis. 



Morphology. Bacilli about 2 p thick and from 3 to 4 //long, some as long 

 as 8 //, with rounded ends, and surrounded by a capsule. 



Biological Characters. Similar to those of Friedlander's bacillus, from 

 which it is differentiated by the following characters : Cocci-like forms less 

 numerous; growth on blood serum less vigorous; growth in bouillon not 

 so abundant ; very pathogenic for rabbits when injected into the circulation, 

 and to mice when injected subcutaneousiy. (Probably a pathogenic variety 

 of Friedlander's bacillus. G. M. S.) 



161. BACILLUS OF HARRIS. 



Obtained by Harris (1892) from an abscess wall in a case in which death, 

 occurred from a cerebral abscess consecutive to otitis media. 



Morphology. Described by Harris as "a diplococcus en capsuled, grow- 

 ing into paired rods and chains of rods, encapsulated in tissues." Rods are 

 from 4 to 6// long and 1 //broad. 



Biological Characters. An aerobic, non-liquefying bacillus. The Lis- 

 ton gold medal of University College, London, was awarded to Harris for 

 his paper relating to this bacillus, which he describes as "a new microorgan- 

 ism of spreading oedema." Notwithstanding this fact, his account of his 

 new bacillus is very incomplete. He describes it as follows: 



Potato. It grows rather slowly at 16 C., in softish, moist, dotted colo- 

 nies, which later coalesce, forming a thinnish layer on the potato. The color 

 is somewhat buff, but after repeated cultivation tends to fade until a cream- 

 colored culture is obtained. The surface, though rather moist, is rough and 

 irregular. The growth is never extensive or thick. 



Agar. It grows in a thin layer, with a tendency to spread. The thick- 

 ness of the growth is unequal and the surface uneven, though tending to be 

 moist. The color is cream in the less transparent portions of the growth. 

 Occasionally, at certain points, there is a tendency to an indipping of the 

 growth. 



Gelatin. It does not liquefy. Same appearance as on agar. The edge 

 of the colony under a low power is seen to be irregularly rounded and fis- 

 sured. The growth seems to proceed radially from many points in the 

 same neighborhood, and hence the rounded and lobed appearance, not un- 

 like a thick section of pancreas. The naked-eye irregularities on the surface 

 are evidently due to this mode of growth. Under the microscope there is, 

 in the thicker portions, a brownish tinge. 



Broth. There is some clouding, and a white, sandy deposit is seen after 

 twenty-four hours, at a temperature of 34 C. 



162. CAPSULE BACILLUS OF NICOLAIER. 



Obtained by Nicolaier (1894) from pus contained in an abscess of the kid- 

 ney obtained post-mortem. 



Morphology. Thick bacilli, with rounded ends, usually four times as 

 long as thick, and frequently presenting irregular outlines ; often united in 

 pairs, and sometimes growing out into filaments; cocci-like forms also occur. 

 Often surrounded by a capsule which remains unstained in stained prepara- 

 tions. Does not stain by Gram's method. 



Biological Characters. An aerobic, and facultative anaerobic, non- 

 liquefying, non-motile bacillus. Does not form spores. Grows at the room 

 temperature and more rapidly at 37 C. Upon gelatin plates at 20 C., at 

 the end of twenty-four to thirty-six hours punctiform colonies are devel- 

 oped, which under a low power appear finely granular, and grayish-yellow 



