428 



ORDER IV. EUBACTERIALES 



Compt. rend. Soc. Biol., Paris, 87, 1922, 

 339; Hauduroy et al., Diet. d. Bact. Path., 

 1937, 78; Ristella trichoides Pr4vot, Ann. 

 Inst. Past., 60, 1938, 292.) 



tri.cho.i'des. Gr. adj. trichoides hair-like. 



Rods, 0.3 by 5.0 microns, with rounded 

 ends. Pleomorphic with long filaments in 

 cultures. Non-motile. Gram-negative. 



Gelatin: No liquefaction. 



Glucose agar: Deep colonies lenticular, 

 tenacious, whitish. 



Martin broth: Uniform turbidity in 2 to 

 3 days followed by fiocculent precipitate 

 and clearing. 



Milk: Acid and coagulation. 



Coagulated egg white: Not digested. 



Coagulated serum: Not digested. 



Hydrogen sulfide produced. 



Acid and gas from glucose, maltose, su- 

 crose, fructose, lactose and mannitol. Gas 

 but no acid from glycerol. 



Neutral red decolorized. 



Anaerobic. 



Optimum temperature, 37° C. 



Pathogenicity: Produces subcutaneous 

 abscesses in rabbits. 



Source: One strain was isolated from a 

 case of cholecystitis. 



Habitat: Presumably found in various in- 

 fections in man. 



8. Bacteroides terebrans (Brocard and 

 Pham, 1934) Kelly, comb. nov. {Bacillus 

 terebrans Brocard and Pham, Compt. rend. 

 Soc. Biol., Paris, 117, 1934, 997; Ristella 

 terebrans Prevot, Ann. Inst. Past., 60, 1938, 

 291.) 



te.re'brans. L. part. adj. terebrans per- 

 forating. 



Rods, 2 to 3 microns long, with rounded 

 ends. Pleomorphic with swollen bodies and 

 chromatic granules. Non-motile. Gram- 

 negative. 



Gelatin: No liquefaction. 



Glucose agar: Deep colonies spherical 

 with irregular edges. Some gas. 



Glucose broth: Uniform turbidity; some 

 gas with foul odor. 



Milk: Acid but no coagulation. 



Coagulated egg white: Not digested. 



Coagulated serum: Not digested. 



Growth inhibited by bile. 



Hydrogen sulfide not produced. 



Acid and gas from glucose, fructose, 

 maltose, lactose, sucrose and mannitol. 



Neutral red decolorized. 



Anaerobic. 



Optimum temperature, 37° C. 



Pathogenicity doubtful. 



Source: Two strains were isolated from 

 cases of gangrenous erysipelas associated 

 with a streptococcus. 



Habitat: Presumably found in various 

 infections in man. 



9. Bacteroides halosniophilus Baum- 

 gartner, 1937. (Baumgartner, Food Re- 

 search, 2, 1937, 321; Ristella halosmophila 

 Prevot, Man. de Class, et de Determ. des 

 Bact. Ana^robies, 1940, 47.) 



ha.los.mo'phi.lus. Gr. noun hals salt; 

 Gr. noun osnms a pushing, thrust; Gr. 

 adj. philus loving; M.L. adj. halosniophilus 

 salt-pressure-loving. 



Rods, with rounded ends and frequently 

 curved, varying in size and shape, the aver- 

 age size being 0.5 by 2.0 to 3.0 microns, 

 occurring singly, in pairs and occasionally 

 in chains. Pleomorphic. Non-motile. Gram- 

 negative. 



Gas is produced. 



NaCl-nutrient gelatin: No liquefaction in 

 21 days. 



NaCl-nutrient broth: Uniform turbidity; 

 sparse, granular sediment. 



NaCl-agar colonies: After 4 to 6 days, 2 

 to 3 mm in diameter, finely granular, 

 smooth, moist, low convex, round, entire, 

 translucent, buff-colored, readily emulsi- 

 fied in 15 per cent NaCl solution. 



NaCl-agar streak: Buff-colored, trans- 

 parent, beaded. 



NaCl cooked meat medium: Gas pro- 

 duced. Meat slightly reddened in 4 days. 

 Slight fetid odor. 



Indole not produced. 



Hydrogen sulfide produced in trace 

 amounts. 



Acid and gas from glucose, maltose and 

 glycerol. No acid from lactose, sucrose, 

 inulin, mannitol, dulcitol or salicin. 



Starch not hydrolyzed. 



Nitrites not produced from nitrates in 21 

 days. 



Halophilic; more than 4 per cent NaCl is 



