488 



MANUAL OF DETERMINATIVE BACTERIOLOGY 



tinct flagella. . . ." (For further de- 

 scription of H and O forms see Moltke, 

 loc. cit.) 



The X2and X19 strains mostly ferment 

 maltose. 



Source: From putrid meat, infusions 

 and abscesses. 



Habitat : Putrefying materials. 



2. Proteus mirabilis Hauser. (Hau- 

 ser, Sitzungsber. d. phys.-mediz. Sozietat 

 zu Erlangen, 1885, 156 ; Bacillus mirabilis 

 Trevisan, I generi e le specie delle Bat- 

 teriacee, 1889, 17; Bacillus proleus mira- 

 bilis Kruse, in Fliigge, Die Mikroorganis- 

 men, 3 Aufl., 2, 1896, 276; Bacterium 

 mirabilis Chester, Del. Coll. Agr. Exp. 

 Sta., 9th Ann. Rept., 1897, 101; Bacillus 

 pseudoramosus Migula, Syst. d. Bakt., 

 2, 1900, 817; not Bacillus pseudoramosus 

 Distaso, Cent. f. Bakt., I Abt., Orig., 

 62, 1912, 441 ; Bacillus proieus-mirabilis 

 Holland, Jour. Bact., 5, 1920, 220.) From 

 Latin mirabilis, wonderful. 



Short rods: 0.5 to 0.6 by 1.0 to 3.0 

 microns, occurring singly, in pairs and 

 frequently in long chains. Motile, pos- 

 sessing peritrichous flagella. Gram-neg- 

 ative. 



Gelatin colonies: Irregular, spreading. 



Gelatin stab : Slow, stratiform lique- 

 faction. 



Agar colonies: Gray, irregular, spread- 

 ing. 



Agar slant : Thin, bluish-gray, spread- 

 ing over surface. 



Broth: Turbid, with thin gray pellicle 

 and sediment. 



Litmus milk: Slightly acid, becoming 

 alkaline, peptonized. 



Potato : Dirty -gray, spreading growth. 



Indole not formed. 



Acetylmethylcarbinol frequently pro- 

 duced weakly. 



Nitrites produced from nitrates. 



Acid and gas from glucose, fructose 

 and galactose. Acid and gas usually pro- 

 duced slowly from sucrose. No acid or 

 gas from lactose, maltose, dextrin or 

 mannitol. 



The XK strains are mostly maltose 

 negative. 



Putrefactive odor produced. 



Hydrogen sulfide is produced. 



Sodium citrate usually utilized as a 

 sole source of carbon. 



Aerobic, facultative. 



Optimum temperature 37 °C. 



Source: From putrid meat, infusions 

 and abscesses. Also reported as a cause 

 of gastroenteritis (Cherry and Barnes, 

 Amer. Jour. Pub. Health, 36, 1946, 

 484). 



Habitat : Putrefying materials. 



3. Proteus morganii (Winslow et al.) 

 Rauss. (Organism No. 1, Morgan, Brit. 

 Med. Jour., 1, 1906, 908; Bacillus morgani 

 Winslow, Kligler and Rothberg, Jour. 

 Bact., 4, 1919, 481; Bacterium morgani 

 Holland, Jour. Bact., 5, 1920, 215; Bac- 

 terium metacoli or Escherichia morgani 

 Thj0tta, Jour. Inf. Dis., 43, 1928, 349; 

 Salmonella morgani Castellani and Chal- 

 mers, Man. Trop. Med., 1919, 939; Rauss, 

 Jour. Path, and Bact., 42, 1936, 183; 

 Morganella morganii Fulton, Jour. Bact., 

 46, 1943, 81 ; regarded by Fulton as the 

 type species of the genus Morganella.) 

 Named for Morgan, who first isolated this 

 organism. 



Common name : Morgan's bacillus, 

 type 1. 



Rods: 0.4 to 0.6 by 1.0 to 2.0 microns, 

 occurring singly. Motile with peri- 

 trichous flagella. See Rauss, loc. cit., 

 for discussion of flagellation and relation 

 to the swarming characteristic. Gram- 

 negative. 



Gelatin colonies: Bluish-gray, homoge- 

 neous, smooth, entire. 



Gelatin stab : No liquefaction. 



Agar colonies : Grayish or bluish-white, 

 circular, entire. 



Agar slant : Grayish-white, smooth, 

 glistening growth. 



Broth: Turbid. 



Litmus milk: Neutral, or becoming 

 alkaline. 



Potato : Dirty-white, limited growth. 



