EXERCISE LXXXI. SARCINA TETRAQENA (Qaffky) Mig. 



MlCROCOCCTJS TETRAGENUS. 



First described in 1883 by Gaffky. It is found in phthisical cavities and sputum and it occasionally occurs in mixed infections as 

 abscesses connected with carious teeth, about the neck, jaws, and middle ear, rarely elsawhere. 



REFERENCES. Gaffky: Langenbeck's Archev, 1883, 28:500. A. 309; H. 130; M. & R. 171 ; M. & W. 133;McF. 443 ; P. 472 ; S. 314. 



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 



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



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



(4) reaction in open arm: 



6. Acid or alkali production, litmus milk 



7. Reduction ol nitrates; to nitrites 



8. Indol production; 24 hours 48 hours 



fecal odor; 24 hours 48 hours 



9. Enzyme production : proteolytic 



... (2) closed arm: 



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



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



to ammonia., 



days. 

 days. 



.diastatic. 



10. Characteristic odor., 



1 1 . Pathogenesis 



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