54 BACTERIOLOGY 



ft Gelatine liquefied. 



Gas generated in glucose bouillon. 



PS. COADUNATA GROUP- i 



No gas generated in glucose bouillon. 



Ps. FAIRMONTENSIS GROUP- i 



* Produce pigment on gelatin or agar. 

 f Pigment yellowish. 



Gelatin liquefied. Ps. OCHRACEA GROUP. 

 Gelatin not liquefied. Ps. TURCOSA GROUP. 

 ff Pigment blue-violet. 



Gelatin liquefied. Ps. JANTHINA GROUP. 

 Gelatin not liquefied. Ps. BEROLINENSIS GROUP. 

 ** Produce a greenish-bluish fluorescence in culture media, 

 f Gelatin liquefied. Ps. PYOCYANEA GROUP. 

 ft Gelatin not liquefied. Ps. SYNCYANEA GROUP. 

 2. With endospores, aerobic and facultative anaerobic. 



a. Non-chromogenic. 



* Rods not swollen at sporulation. Ps. ROSEA GROUP. 

 ** Rods swollen at one end at sporulation. 



Ps. TROMELSCALAGEL GROUP. 

 'b. Produce a greenish-bluish fluorescence in culture media. 



* Gelatin liquefied. Ps. VIRIDESCENS GROUP. 

 ** Gelatin hot liquefied. Ps. UNDULATA GROUP. 



B. Do not grow in nurient gelatin or other organic media. 



NlTROMONAS GROUP. 



II. Cell plasma with a reddish tint, also with sulphur granules. 



CHROMATIUM GROUP. 



Microspira Migula 



I. Cultures show a bluish-silvery phosphorescence. 



PHOSPHORESCENT GROUP- 

 II. Cultures not phosphorescent. 



A, Gelatin liquefied. 



1. Cultures show the nitro-indol reaction. 



. Very pathogenic to pigeons. MSP. METSCHNIKOVI GROUP. 



b. Not distinctly pathogenic to pigeons. CHOLERA GROUP. 



2. Nitro-indol reaction negative or very weak, at least after 24 hours. 



CHOLERA NOSTRAS GROUP. 



B. Gelatin not liquefied or only slightly so. MSP. SAPROPHILA GROUP. 



