THE CLASSIFICATION OF BACTERIA 73 



2. M. catarrhalis Frosch-Kolle 



Kokkus bei inftktioser Bronchitis Seifert : Volkmann's Klin. Vortr., No. 240. 

 Micrococcus catarrhalis Frosch-Kolle: Fliigge, Die Mikroorganismen, 1896, 154. 



Morphology . Cocci 1.0-2.0 ft, slightly oval, rpostly in twos, with a clear space 



between, like gonococci. 

 Decolorized by Gram's method. 



Gelatin stab. A slight growth along line of stab ; medium not liquefied. 

 Agar slant. White colonies like M. pyogenes var. albus. Grow best on blood 



agar, as white discrete colonies. Cultures on artificial media die in 3-4 days. 

 Pathogenesis . Inoculations of smaller animals negative. 

 Habitat. Associated with an infectious bronchitis ; found in the sputum and 



nasal secretions. According to Pfeiffer, perhaps an identical species 



is found in the purulent secretions of cases of bronchopneumonia in 



children. 



CLASS II. WITHOUT PIGMENT. GROW ON ORDINARY CULTURE 

 MEDIA. DO NOT GROW AT 20 C, OR POORLY IN NO. 3. 



I. Gonococcoid forms. 



3. M. bovis (Babes). 



4. M. Demmei. 



II. Staphlococcus forms. 



5. M. endocarditis Weichselbaum. 



3. M. bovis (Babes). 



Hamatococcus bovis Babes : Virchow's Archiv, CXV, 1889. 



Morphology . Gonococcoid-oblong forms ; isolated or united in groups. 



Free cocci surrounded by a pale yellowish shining aureole. ' Decolorized 



by Gram's method. Facultative anaerobic. 

 Gelatin stab. Along the line of stab a feeble growth, composed of small 



white colonies. 

 Agar slant. Small transparent colonies. 

 Potato. At 37 C, growth thin, spreading, yellowish, glistening, scarcely 



visible. 

 Blood Serum. Small, moist, transparent colonies. 

 Pathogenesis. Inoculations of rabbits and rats positive, with death in 6-8 



days ; spleen enlarged, lungs hyperaemic, bloody serum in peritoneal cavity, 



cocci in blood. Guinea pigs immune. 

 Habitat. Isolated from blood and organs of cattle in an epidemic malady 



with haemaglobinuria. 



