Page:Bergey's manual of determinative bacteriology.djvu/453

 see DeToni and Trevisan, in Saccardo, Sylloge Fungorum, 8, 1889, 1025; Ristella putrcdinis Prevot, Ann. Inst. Past., 60, 1938, 291.) put.re'di.nis. L. noun piitredo putridity; M.L. gen. noun putredinis of putridity. Straight rods, 0.8 by 3.0 to 4.0 microns, with rounded ends, one of which may be swollen. Non-motile. Gram-negative. Gelatin: Liquefaction. Foul odor. Agar: Deep colonies small, round to ar- borescent. No gas. Broth: Rapid growth; uniform turbidity. No gas ; foul odor. Milk: Rapid growth; casein precipitated and peptonized. Small amount of gas; foul odor. Coagulated serum: Digested. Indole is produced. Hydrogen sulfide produced in broth. No acid or gas from carbohydrates. Anaerobic. Optimum temperature, 37° C. Pathogenicity : Produces local abscesses in animals when mixed with Escherichia coli. Source: Fifteen strains were isolated from cases of acute appendicitis. Habitat: From cases of acute appendicitis and presumably found in similar infections in man. 16. Bacteroides uncatus Eggerth and Gagnon, 1933. (Eggerth and Gagnon, Jour. Pact., 25, 1933, 404; Ristella uncata Prevot, Ann. Inst. Past., 60, 1938, 291.) un.ca'tus. L. adj. uncatus hooked at the tip. Rods, ordinarily 5 to 8 microns long, with extreme variations in size and form; curved and hooked forms are common. Non-motile. Gram-negative. Gelatin: Liquefaction in 16 daj's. Blood agar colonies: Very minute and transparent. Broth: Turbid; growth is slow and light. Milk: Not acidified or coagulated. Indole not produced. Hydrogen sulfide not produced. Acid but no gas after 8 to 30 da3^s of incu- bation from dextrin, fructose, galactose, glucose, lactose, maltose, raffinose, rham- nose, salicin, starch and sucrose. No acid from esculin, amygdalin, arabinose, cello- biose, glycerol, glycogen, inulin, mannitol, mannose, melezitose, sorbitol, trehalose or xylose. Nitrites not produced from nitrates. Peptone: No gas. Anaerobic. Non-pathogenic for white mice or rabbits. Source: One strain was isolated from human feces. Habitat: Probabl}' the intestinal canals of mammals. 17. Bacteroides lumidus Eggerth and Gagnon, 1933. (Eggerth and Gagnon, Jour. Pact., 25, 1933, 405; Ristella tumida Prevot, Ann. Inst. Past., 60, 1938, 292.) tu'mi.dus. L. adj. tumidus swollen. Small, thick, ellipsoidal rods, 1.0 to 1.5 microns long, occurring singly. On glucose broth there are many swollen forms, 1.0 to 4.0 by 1.5 to 10.0 microns, which stain ir- regularly; the bodies of these swollen forms are usually very pale, with only the ends staining. Non-motile. Stain solidly. Gram- negative. Gelatin: Liquefaction in 12 to 20 days. Blood agar colonies: Soft, grayish, ele- vated colonies, 1 mm in diameter. Broth: Heavy, diffuse growth. INIilk: Acidified but not coagulated. Indole not produced. Hydrogen sulfide is produced. Acid but no gas from de.xtrin, fructose, galactose, glucose, glycogen, inulin, lactose, maltose, mannose, rafRnose, sorbitol, starch and sucrose. No acid or gas from esculin, amygdalin, arabinose, cellobiose, glycerol, mannitol, melezitose, rhamnose, salicin, trehalose or xylose. Nitrites not produced from nitrates. Peptone: No gas. Anaerobic. Non-pathogenic for white mice or rabbits. Source: Four strains were isolated from human feces. Habitat: Probably the intestinal canals of mammals. 18. Bacteroides exiguus Eggerth and Gagnon, 1933. (Eggerth and Gagnon, Jour. Bact., 25, 1933, 407; Ristella exigua Prevot, Ann. Inst. Past., 60, 1938, 292.)