FAMILY X. LACTOBACILLACEAE 



559 



Source: Isolated from pus from a dental 

 abscess. 

 Habitat: Unknown. 



17. Eubacteriuni disciformans (Mas- 



sini, 1913) Prevot, 1938. (Bacillus discifor- 

 mans IMassini, Ztschr. f. gesammte Exp. 

 Med., 2, 1913, 81; Prevot, Ann. Inst. Past., 

 60, 1938, 295.) 



dis.ci. for 'mans. Gr. noun discus a disc; 

 L. part. adj. formans forming; M.L. adj. 

 disciformans disc-forming. 



Small, ovoid rods, 0.3 to 0.7 by 0.5 to 0.7 

 micron, with rounded ends, occurring 

 singly, in pairs and in small masses. Non- 

 motile. Gram-positive (decolorizing easily). 



Gas not produced in culture media. 



Gelatin: No growth. 



Deep lactose agar colonies: Punctiform, 

 then lenticular, forming a disc of colonies 

 in the upper part of the medium. No gas 

 produced. 



Glucose broth agar: Acidified. 



Glucose broth: Fine, flak}' growth which 

 precipitates, leaving the medium clear. 



Milk: Slowlj- coagulated. 



Indole not produced. 



Acid but no gas from glucose, fructose, 

 maltose, lactose, sucrose, galactose, arabi- 

 nose, mannitol and starch. 



Ammonia and formic, acetic and propionic 

 acids are produced. 



Nitrites not produced from nitrates. 



Neutral red not reduced. 



Anaerobic. 



Optimum temperature, 37° C. Killed at 

 56° C. 



Pathogenic for man, rabbit, guinea pig 

 and mouse. 



Source: Isolated from cases of fetid sup- 

 purations in empyema, pulmonary gan- 

 grene, liver abscess and dermatosis. 



Habitat: Found in the respiratory sys- 

 tem, the liver and the skin. Common. 



18. Eubacterium ininutum (Hauduroy 

 et al., 1937) Prevot, 1938. (Bacillus an- 

 aerobicus minutus Tissier, Recherches sur la 

 fiore intestinale des nourissons, Paris, 1900; 

 Bacteroides minutus Hauduroy et al.. Diet, 

 d. Bact. Path., 1937, 64; Prevot, Ann. Inst. 

 Past., 60, 1938, 295.) 



mi.nu'tum. L. part. adj. minutus small 

 (literally, diminished). 



Very slender, straight rods, 2.0 to 4.0 

 microns in length, with rounded ends, oc- 

 curring singly or in pairs. Non-motile. 

 Gram -positive. 



Gas not produced in culture media. 



Deep agar colonies: Delicate, irregular, 

 ovoid. 



Glucose broth: Poor growth. Slightly 

 turbid. 



Anaerobic. 



Optimum temperature, 37° C. 



Pathogenic for mice. 



Source: Isolated from a case of diarrhea 

 in an infant. 



Habitat : Found in the intestines of breast- 

 fed infants. Uncommon. 



19. Eubacterium lentuni (Eggerth, 

 1935) Prdvot, 1938. (Bacteroides lentus Eg- 

 gerth, Jour. Bact., SO, 1935, 280; Prevot, 

 Ann. Inst. Past., 60, 1938, 295.) 



len'tum. L. adj. lentus slow. 



Short, ovoid rods, 0.5 to 1.5 by 2.0 to 3.0 

 microns, occurring in chains. Pleomorphic, 

 occurring as coccoid forms and as spindles 

 up to 6.0 microns in length. Non-motile. 

 Gram-positive. 



Gas not produced in culture media. 



Gelatin: No liquefaction. 



Deep blood agar colonies: Small, 0.25 to 

 0.75 mm in diameter. Not hemolytic. 



Milk: No coagulation. 



Coagulated proteins not attacked. 



Indole not produced. 



Hydrogen sulfide produced in trace 

 amounts. 



Carbohydrates not attacked. 



Anaerobic. 



Optimum temperature, 37° C. 



Not pathogenic. 



Source: Isolated from human feces. 



Habitat: Found in normal human feces. 

 Common. 



20. Eubacterium poeciloidcs (Roger 

 and Gamier, 1906) Prevot, 1938. (Bacillus 

 poeciloides Roger and Garnier, Bull, et Mem. 

 Soc. Med. des Hopitaux Paris, 2, 1906, 870; 

 Prevot, Ann. Inst. Past., 60, 1938, 295.) 



