430 



ORDER IV. EUBACTERIALES 



branes of mammals but may take a part in 

 various pathological processes (Burdon). 



12. Bacteroides ovatus Eggerth and 

 Gagnon, 1933. (Eggerth and Gagnon, Jour. 

 Bact., ^5, 1933, 405; Pasteurella ovata Prevot, 

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



o.va'tus. L. adj. ovatus ovate, egg-shaped. 



Small, ellipsoidal rods, 0.5 to 1.0 by 1.0 

 to 2.0 microns, occurring singly. Non- 

 motile. Stain solidly. Gram-negative. 



Gelatin: Liquefaction in 4 days. 



Blood agar colonies: Soft, grayish ele- 

 vated colonies, 1.0 to 1.5 mm in diameter. 



Broth: Diffuse, heavy growth. 



Milk: Acidified and coagulated in 4 days. 



Indole is produced. 



Hydrogen sulfide is produced. 



Acid and a small amount of gas from 

 esculin, amygdalin, cellobiose, dextrin, 

 fructose, galactose, glucose, glycogen, inu- 

 lin, lactose, maltose, mannose, raffinose, 

 rhamnose, starch, sucrose and xylose. No 

 acid or gas from arabinose, glycerol, manni- 

 tol, melezitose, salicin, sorbitol or trehalose. 



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: Probably the intestinal canals 

 of mammals. 



13. Bacteroides convexus Eggerth and 

 Gagnon, 1933. (Eggerth and Gagnon, Jour. 

 Bact., 25, 1933, 406; Pasteurella convexa 

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



con. vex 'us. L. adj. convexus convex. 



Thick, ellipsoidal rods, 0.8 to 1.5 microns 

 long, occurring singly or in pairs. In glucose 

 broth, the rods are usually 2.0 to 3.0 microns 

 long. Non-motile. Gram-negative. 



Gelatin: Liquefaction in 20 to 30 days. 



Blood agar colonies: Elevated, grayish, 

 somewhat opaque colonies, 1.0 to 1.5 mm in 

 diameter. 



Broth: Heavy diffuse growth. 



Milk: Acidified and coagulated in 4 days. 



Indole not produced. 



Hydrogen sulfide is produced. 



Acid and a small amount of gas from 

 esculin, amygdalin, cellobiose, dextrin, 

 fructose, galactose, glucose, glycogen, 

 inulin, lactose, maltose, mannose, raffinose, 

 starch, sucrose and xylose. No acid or gas 

 from arabinose, glycerol, mannitol, melezi- 

 tose, rhamnose, salicin, sorbitol or tre- 

 halose. 



Nitrites not produced from nitrates. 



Peptone: No gas. 



Anaerobic. 



Non-pathogenic for white mice or rabbits. 



Source: Five strains were isolated from 

 human feces. 



Habitat: Probably the intestinal canals 

 of mammals. 



14. Bacteroides coagiilans Eggerth and 

 Gagnon, 1933. (Eggerth and Gagnon, Jour. 

 Bact., £5, 1933, 409; Pasteurella coagulans 

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



co.a'gu.lans. L. part. &&]. coagulans curd- 

 ling, coagulating. 



Rods, 0.5 to 2.0 microns long. Show bi- 

 polar staining. Non-motile. Gram-negative. 



Gelatin: Liquefied in 8 to 12 days. 



Blood agar colonies: Soft, transparent, 

 0.5 mm in diameter. 



Broth: Diffuse growth. 



Milk: Coagulated in 8 days without acid 

 production. The coagulum partly redis- 

 solves after 3 to 4 weeks. 



Indole is produced. 



Hydrogen sulfide is produced. 



Nitrites not produced from nitrates. 



Anaerobic. 



Non-pathogenic for white mice or rabbits. 



Distinctive characters: No acid or gas 

 from carbohydrates. A small amount of 

 gas is produced from peptone. Phenol red 

 and brom cresol purple are decolorized in a 

 meat infusion broth. 



Source: One strain was isolated from 

 human feces. 



Habitat: Probably the intestinal canals of 

 mammals. 



15. Bacteroides putredinis (Weinberg 

 et al., 1937) Kelly, couih. nov. (Bacillus A, 

 Heyde, Beitr. z. klin. Chirurg., 76, 1911, 1; 

 Bacillus 'putredinis Weinberg et al., Les 

 Microbes Ana^robies, 1937, 755; not Bacillus 

 putredinis Trevisan, Add. ad Gen., p. 36; 



