EXERCISE LXXXIII. BACTERIUM PNEUMON1AE (Welchselbaum) Mlg. 



PNEUMOCOCCUS ; DIPLOOOCOUS OP PNEUMONIA; MICROOOCOOS LANCEOLATTJS. 



First described by Sternberg in 1880. Found in saliva and nasal secretion of healthy persons about 20 per cent. Usually present 

 in "rusty sputum" of pneumonia. 



EEPEEENOES. Weichselbaum : Am. Jour. Med. Sci., July, 1886: Welch: Johns Hop. Hosp. Bulletin, 1892, 8; 125; A. 303. H. 273; L. 

 & K. 118; M.& R. 204; M. & W. 128; McF. 345; P. 498; S. 298. 



PHYSIOLOGICAL CHARACTERS. 



i. Relation to temperature: 



2. Relation to free oxygen: 



3. Relation to other agents, such as: 



desiccation, light, disinfectants, etc.: 



4. Pigment production: 



5. Gas production in glucose media: 



a. Shake culture 



b. Fermentation tube, growth in: (i) open arm: 



(3) rate of development: 24 hours per cent., 48 hours. 



(4) reaction in open arm: 



6. Acid or alkali production, litmus milk , 



7. Reduction of nitrates; to nitrites 



8. Indol production; 24 hours ,48 hours 



fecal odor; 24 hours ,48 hours 



9. Enzyme production: proteolytic 



(2) closed arm: 



.per cent., 72 hours percent., hours. 



(5) gas formula, H : CO : : : 



per cent. 



. to ammonia 



. days . 

 . days . 



.diastatic. 



10. Characteristic odor. 



11. Pathogenesis 



[100] 



