EXERCISE LIX. BACILLUS PRODIQIOSUS (Ehrenb.) Fluegge. 



EXPLANATORY. This organism was first described by Ehrenberg (Erhandlunger der Berliner Akademie) in 1839 and named Monas 

 prodigiosa. It is the oldest known chromogenic bacterium. It is commonly found in the air of Europe and has a very interesting his- 

 tory on account of its casual relation to bread epidemics "bloody bread," "bleeding host," etc. It is questionable if it occurs sponta- 

 neously in this country. It is slightly pathogenic. Introduced intraperitoneally into guinea pigs in large quantities it produces death. 

 Inoculated into animals naturally immune to malignant oedema it renders them susceptible. Rabbits inoculated with anthrax are protected 

 by a subsequent inoculation with this organism. It is grown with the streptococcus of erysipelas to produce Coley's Fluid for treatment 

 of inoperable malignant tumors. 



REFERENCES. Lafar, 137-138. 



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 produ ction 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 hou rs ,48 hours 



9. Enzyme production : proteolytic 



....(s) closed arm: 



percent., 72 hours per cent., hours . 



...(5) gas formula : H : CO 2 : : : 



per cent. 



, to ammonia. 



. days, 

 days. 



. diastatic. 



10. Characteristic odor. 



11. Hathogenesis 



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