Page:Bergey's manual of determinative bacteriology.djvu/203

 Agar slant: Yellow to orange, glistening, translucent, slightly spreading. May lose power to form pigment. Broth: Turbid, with yellow sediment. Litmus milk: Unchanged. Potato: Dark yellow, raised, rough, spreading. Indole not produced. Nitrites and ammonia produced from nitrates. Ammonia produced from peptone. Starch digested. Aerobic, facultative. Optimum temperature, 25° C. Habitat: Water and soil.

7. Pseudomonas perlurida Kellerman et al., 1913. (Kellerman, McBeth, Scales and Smith, Cent, f . Bakt., II Abt., S9, 1913, 516; also see McBeth, Soil Sci., /, 1916, 472.) per.lu'ri.da. L. prefi.x per very; L. luridus pale yellow, sallow; M.L. adj. perluridus verj' sallow. Rods 0.4 by 1.0 micron. Motile with one to three polar flagella. Gram-negative. Gelatin stab: Liquefied. Agar slant: Moderate, flat, faint yellow growth. Broth: Turbid in 5 days. Litmus milk: Acid. Peptonization after 16 days. Potato: Scant, 3'ellow growth with bleaching along line of growth. Indole not produced. Nitrites not produced from nitrates. Ammonia produced. Acid from glucose, maltose, lactose, sucrose, starch, glycerol and mannitol. Aerobic, facultative. Optimum temperature, 20° C. Source: Soil from Virginia, Louisiana and Missouri. Habitat: Soil.

8. Pseudomonas ochracea (Zimmer- mann, 1890) Chester, 1901. {Bacillus ochra- ceus Zimmermann, Bakt. unserer Trink- und Nutzwasser, Chemnitz, /, 1890, 60; Chester, Man. Determ. Bact., 1901, 316.) och.ra'ce.a. Gr. noun ochra ochre; M.L. adj. ochraceus of the color of ochre. Rods, 0.7 to 0.8 by 1.2 to 4.5 microns, occurring in pairs and longer chains. Slow, undulatory motion (Zimmermann). Polar flagella (Lehmann and Neumann, Bakt. Diag., 1 Aufl., 2, 1896, 255). Gram-negative. Gelatin colonies: Pale yellow to golden, ochre-yellow, slightly raised, with slightly fringed margin, granular. Gelatin stab: Yellowish to yellow -gray surface growth. Infundibuliform lique- faction. Pale yellow to ochre-yellow sedi- ment. Agar colonies: Thin, flat, yellowish, smooth. Agar slant: Thin, yellowish gray to ochraceous growth. Broth: Slightly turbid, with pale yellow sediment. Litmus milk: Medium becomes slimv: alkaline. Potato: Ochre-yellow streak. Indole produced. Nitrites not produced from nitrates. Hydrogen sulfide produced. Aerobic, facultative. Optimum temperature, 35° C. Source: Chemnitz tap water. Habitat: Water.

9. Pseudomonas cerevisiae Fuhrmann, 1906. (Cent. f. Bakt., II Abt., 16, 1906, 309.) ce.re.vi'si.ae. L. cerevisia beer; M.L. gen. noun cerevisiae of beer. Rods straight or slightly curved, 0.6 by 1.5 to 2.0 microns, occurring singly and in chains. Motile, possessing a tuft of four to six polar flagella. Gram-negative. Gelatin colonies: Circular, white, slightly contoured, becoming brownish yellow. Gelatin stab: Slight yellowish growth in stab. No liquefaction. Agar colonies: Thin, spreading, con- toured. Agar slant: Moist, glistening, thin, pale yellow, spreading, contoured. Litmus milk: Slow coagulation. Potato: Yellowish brown, spreading growth. Indole not produced. Nitrites produced from nitrates. No gas from glucose. Aerobic, facultative. Optimum temperature, 30° C. Source: Isolated from beer. Habitat: Unknown.