FAMILY PSEUDOMONADACEAE 



197 



Gelatin colonies : Small, gray, granular, 

 entire. 



Gelatin stab: Rapid, saccate liquefac- 

 tion. 



Agar slant: Yellowish-white, plumose, 

 glistening. 



Broth: Turbid. 



Litmus milk : Not coagulated. 



Potato: No growth. 



Indole not formed. 



Slight production of nitrites from 

 nitrates. 



Aerobic, facultative. 



Optimum temperature 30°C. 



Source: Isolated from cheese. 



5. Vibrio xenopus Schrire and Green- 

 field. (Trans. RoA^al Soc. So. Africa, 

 17, 1930, 309.) From Xenopus, a genus 

 of African toads. 



Spiral forms, occurring singly and in 

 pairs. Non-motile. Gram-negative. 



Gelatin stab : Slow, cratcriform liciue- 

 faction. 



Agar colonies : Small, white, glistening, 

 slim}% entire. 



Agar slant : Grayish-white, slimy, 

 entire. 



Broth: Turbid with flocculent sedi- 

 ment. 



Litmus milk: Unchanged. 



Potato: Not reported. 



Indole is not formed. 



Nitrites are produced slowly from 

 nitrates. 



Blood serum is peptonized. 



Starch is not hydrolj'zed. 



Acid from glucose, fructose, maltose, 

 glycerol and sorbitol. 



Aerobic, facultative. 



Optimum temperature 37°C. 



Source : Found in abscess of pectoral 

 muscle of African toad. 



6. Vibrio piscium David. (Cent. f. 

 Bakt., I Abt., Orig., 102, 1927, 46.) From 

 Latin pise is, fish. 



Curved rods : 0.3 to 0.5 by 2.0 microns. 

 Motile with a single polar flagellum. 

 Gram-negative. 



Gelatin colonies : Circular, granular, 

 opaque. 



Gelatin stab : Napiform liquefaction. 



Agar colonies : Yellowish, circular, 

 smooth, entire, iridescent. 



Agar slant : Light yellow, transparent 

 streak. 



Broth: Slight turbidity, with thin 

 pellicle. 



Litmus milk : Soft coagulum. Pep- 

 tonized, alkaline. 



Potato: Brownish-red streak. 



Indole is formed. 



Nitrites not produced from nitrates. 



Hydrogen sulfide formed. 



No action in sugar media. 



Pathogenic for frogs. 



Aerobic, facultative. 



Optimum temperature 18° to 20°C. 



Habitat : Causes epidemic infection in 

 fish. 



7. Vibrio proteus Buchner. (Kom- 

 mabacillus der cholera nostras, Finkler 

 and Prior, Deutsche med. Wochenschr., 

 1884, 632; Buchner, Sitzungsber. d. 

 Gesel. f. Morph. u. Physiol., Miinchen, 

 Heft 1, 1885, 10; Pacinia finkleri Trev- 

 isan, Atti d. Accad. Fi sio -Medico - 

 Statistica in Milano, Ser. 4, 3, 1885, 84; 

 Microspira finkleri Schroeter, in Cohn, 

 Krytogamen-Flora von Schlesien, 3, 1, 

 1886, 168; Spirillum finkleri Crookshank, 

 Man. of Bact., 3rd ed., 1890, 282; Micro- 

 spira protea Chester, Manual of Deter- 

 minative Bacteriology, 1901, 338; Vibrio 

 finkleri Holland, Jour. Bact., 5, 1920, 

 225.) From Greek, Proteus, a marine 

 deity who had the power of assuming any 

 shape he chose. 



Curved rods : 0.4 to 0.6 by 2.4 microns, 

 often pointed at both ends. Motile, 

 possessing a polar flagellum. Gram- 

 negative. 



Gelatin colonies: Small, gray, circular, 

 granular, entire. 



Gelatin stab: Rapid, saccate lique- 

 faction. 



Agar slant : Dirty grayish, plumose. 



Broth: Turbid, with fetid odor. 



