34 Biochemical Activity of Micro organisms [March, 



TABLE 3 



Data pertaining to tests for emulsin-production on amygdalin-agar 



Organism Growth 



Fusarium culmorum Excellent 



Alternaria sp Fair 



Oospora Scabies None 



Streptothrix sp Good 



B. fluorescens liquifaciens Good 



B. coli Good 



Bact. lactis acidi Good 



B. denitrificans Good 



B. prodigiosus Fair 



Bact. tumefaciens Fair 



B. mycoides Slight 



B. catnpestris Slight 



M. citricus Slight 



TABLE 4 



Data pertaining to tests for lipase-production on litmus-cream-agar 



Organism Growth Reddening of litmus* 



Sphcerostilbe coccophila Good None 



H elminthosp orium turcicum Good Good, dififusing 



Macrosporitim sp Good Sharp 



Fusarium culmorum Good Deep, diffusing 



Stysanus capitata Good Slight 



Penicillium sp Good Sharp 



Oidium lactis Good Good, diffusing 



Streptothrix sp Good Good, diffusing 



Asotobacter chroococcum None 



B. megatherium Good Good, diffusing 



B. butyricus Good Good, diffusing 



B. fluorescens liquifaciens Good Deep 



B. mycoides Good Good, diffusing 



B. Proteus vulgaris Good Sharp, brilliant 



B. pyocyaneus Good Good, diffusing 



B. coli Good Good, diffusing 



B. prodigiosus Good Deep 



Bacteria of ropy milk Good None, blue stain reduced 



M. citricus Good Slight, diffusing 



Sarcina alba Good Deep 



Diplococcus sp Good None 



inoculated with various organisms. A medium containing approxi- 

 mately 2.5 percent of butter-fat and a very small amount of other 



*" Sharp," in the above table, indicates that the red area produced by the 

 organism is sharply defined and in marked contrast to the surrounding blue. 

 " Diffusing " indicates a gradual gradation f rom red through purple to blue, the 

 acid apparently diffusing more rapidly than in the case of sharp contrast. 



