8 4 BACTERIOLOGY 



25. M. stellatus Maschek 



Jahresbericht der Oberrealschule zu Leitmeritz, 1887. 



Morphology. Cocci never in chains. 



Gelatin colonies. Star-shaped, due to numerous extensions, the ends of which 



are branched. 



Gelatin stab. Along line of stab an arborescent growth. 

 Potato. A brownish yellow, slimy growth. 

 Habitat. Water. 



26. M. tetragenus Koch-Gaffky 



Mitteilungen a. d. Kaiserl. Gesundheitsamte, II, 1884, 42. 



Morphology. Cocci round-oval, i.o p., variable; in animal body as tetrads, 



the latter surrounded by a capsule. 

 Aerobic, only slight growth under anaerobic conditions. 

 Gelatin colonies. Deep colonies : Irregular, entire, opaque, granular moruloid 



nodular. Surface colonies : Small, irregular, entire, white, moist, slightly 



raised. Microscopically round, entire, becoming lobed-lacerate, gray. 

 Gelatin stab. A white beaded growth along line of stab ; on the surface in 



10 days a white, thick growth. 



Agar slant. A thick, slimy, grayish yellow, moist, glistening growth. 

 Bouillon. Medium clear, with a sediment. 

 Milk. May or may not be coagulated. 

 Potato. Growth thick, white, viscid, limited. 



Glucose bouillon. Rendered acid. Indol negative. H 2 S negative. 

 Pathogenesis. Mice inoculated subcutaneously show, somnolence in 2 days, 



and die in 3-6 days. Bacilli in spleen, liver, kidneys, and lung. Guinea 



pigs show a local abscess or septicaemia. Intraperitoneal inoculations 



cause a purulent peritonitis. 

 Habitat. Found in phthisical cavities, and in sputum. 



27. M. Mendozae (Trev.) Mendoza 



M. tetragenus-mobilis Mendoza: Centralblatt f. Bakteriologie, VI, 1889, 506. 

 Gaffkya Mendoza Trevisan : Saccardo, Sylog. Fungorum, VIII, 1043. 



Morphology. Cocci in tetrads, surrounded by a capsule. 



Gelatin colonies. Round, dirty white, finely granular. 



Gelatin stab. On the surface a dirty white growth. Old cultures give off an. 



odor of skatol. 



Agar slant. Growth dirty white. 

 Habitat. Isolated from the contents of the stomach. 



