FAMILY LACTOBACTERIACEAE 



329 



Streptococcus foetidus by being mor- 

 phologically like a typical streptococcus. 

 Differs from Streptococcus putridus by its 

 physiology, bread crumb-like growth, and 

 the production of gas in all media. 



Source : Isolated in cases of putrefac- 

 tive gangrene ; war wounds ; uterus, lochia 

 and blood in puerperal infections; ap- 

 pendicitis; pleurisy; and amniotic fluid. 



Habitat : Mouth and intestines. 

 Cavities of man and animals, especially 

 the vagina. Can invade all tissues. 



18. Streptococcus foetidus (Veillou) 

 Prevot. {Micrococcus foetidus Veillon, 

 Compt. rend. Soc. Biol. Paris, 4^, 1893, 

 867; not Streptococcus foetidus Migula, 

 Syst. d. Bakt., 2, 1900, 38; Prevot, Ann. 

 Sci. Nat., S6r. Bot., 15, 1933, 189.) From 

 Latin foetidus (better fetidus), stinking. 



Large spheres: 0.8 to 1.0 micron, oc- 

 curring normally in short chains, also in 

 tetrads, double or zig-zag chains. Non- 

 motile. Gram-positive. 



Gelatin: No licjuefaction. 



Semi-solid agar (Veillon) : Slow growth. 

 At first punctiform; small colonies i to | 

 mm in diameter, growing 1 to 2 cm below 

 the surface, regular, thick, lenticular, 

 opaque. Gas bubbles produced. 



Blood agar: Small brownish hemo- 

 peptic zone around the colonies. No 

 true hemolysis. 



Martin broth: Poor growth. No tur- 

 bidity. Flakes form on wall of tube, but 

 rapidly settle to the bottom. Little or 

 no gas. Very faint fetid odor. 



Martin glucose broth: Good growth. 

 No turbidity. Gas fetid, inflammable. 



Meat and liver broth : Rapid, abundant 

 growth. Abundant gas. Strong fetid 

 odor. 



Milk: No acid. No coagulation . 



Peptone water: Gas production feeble. 

 Indole not formed. 



Neutral red broth changed to fluores- 

 cent yellow. 



Fresh organs become green, then 

 blacken. Much gas produced containing 

 H2S, later the organs are gradually disin- 



tegrated; partial bioproteolysis and H^S 

 fermentation. 



Cooked protein not attacked. 



Acid and gas from glucose, fructose, 

 galactose and sucrose. No acid from 

 lactose, maltose, arabinose, glycerol, man- 

 nitol, dulcitol or starch. 



Temperature relations : Optimum 36° 

 to 38°C. Feeble growth at 26°C. No 

 growth below 22°C. Killed in one hour 

 at 60°C or in ten minutes at 80°C. 



Optimum pH 6.5 to 8.0. 



Pathogenic for guinea pigs and mice. 



Strict anaerobe. 



Common in fetid suppurations and 

 autogenous gangrenous processes. 



Source : First isolated from a fatal case 

 of Ludwig's angina. Perinephritic 

 phlegmon ; the fetid pus from Bartholin's 

 gland ; gangrene of the lung ; appendicitis. 



Habitat: Mouth, intestine and vagina 

 of man and animals. 



18a. Streptococcus foetidus var. buccal is 

 Prevot. (Einen Micrococcus der Mund- 

 hohle, Ozaki, Cent. f. Bakt., I Abt., 

 Orig., 76, 1915, 118; Micrococcus buccalis 

 Bergey et al.. Manual, 1st ed., 1923, 69; 

 Prevot, Ann. Sci. Nat., Ser. Bot., 15, 

 1933, 193.) From mouth. 



19. Streptococcus putridus Schott- 

 mliller emend. Prevot. (Schottmiiller, 

 ]\Iitteil. a. d. Grenzgeb. d. Med. Chirurg., 

 21, 1910, 450; Prevot, Ann. Sci. Nat., 

 Ser. Bot., 15, 1933, 170, 184.) From 

 Latin putridus, rotten, decayed. 



Synonym : Streptococcus putrificus 

 Schottmiiller, Miinch. med. Wochnschr., 

 68, 1921, 662. 



Spheres: Average size 0.8 micron, oc- 

 curring in chains. Gram-positive. 



Gelatin: No liquefaction. 



Semi-solid agar (Veillon) : More or less 

 lenticular ; colonies 1 to 2 mm in diameter. 

 No gas produced. 



Blood agar: A blackish-brown hemo- 

 peptic zone is produced around the 

 colonies, with fetid gas (H2S). Colonies 

 become brownish, sometimes blackish. 



Martin broth : In 6 to 8 hours uniform 



