FAMILY LACTOBACTERIACEAE 



315 



b. Acid from maltose. 



17. Streptococcus anaerobius. 

 bb. No acid from maltose. 



18. Streptococcus foetidus. 

 aa. Turbidity in broth. 



b. No gas in Veillon's semisolid agar. No gas in peptone water. 



19. Streptococcus putridus. 



bb. Abundant gas in semisolid agar. Gas in peptone water. 



20. Streptococcus lanceolatus. 

 2. No gas and no fetid odor produced. 



a. Milk not coagulated. 



21. Streptococcus micros. 

 aa. Milk coagulated. 



b. Viscous sediment in broth. Semisolid agar colonies blacken 

 with age. 



22. Streptococcus parvulus. 



bb. No viscous sediment in broth. Semisolid agar colonies do not 

 blacken with age. 



23. Streptococcus intermedius, 

 B. Microaerophilic. 



1. Strictly anaerobic on isolation, later microaerophilic. 



24. Streptococcus evolutus. 



1. Streptococcus pyogenes Rosenbach. 

 (Fehleisen, Ueber Erysipel, Deut. Zeit. 

 f. Chir., 16, 1882, 391; Erysipelkokken, 

 Fehleisen, Die Aetiologie des Erysipels, 

 Berlin, 1883; Rosenbach, Mikroorganis- 

 men bei Wundinfektionskrankheiten des 

 Menschens, 1884, 22; Streptococcus ery- 

 sipelatos (sic) Rosenbach, ibid., 22; 

 Micrococcus erysipelatis Zopf, Die Spalt- 

 pilze, 2 Aufl., 1884, 86; Streptococcus 

 erysipelatis Zopf, Die Spaltpilze, 3 

 Aufl., 1885, 51 ; Streptococcus erysipelato- 

 sus Klebs, Die Allg. Path., Jena, 1887, 

 318; Micrococcus scarlatinae and Strepto- 

 coccus scarlatinae Klein, Report of the 

 Medical Officer of the Local Government 

 Board for 1885-1886, No. 8, 1887, 85; 

 Streptococcus conglomeratus Kurth, Arb. 

 d. k. Gesundheitsamte, 7, 1891, 389; 

 Streptococcus longus von Lingelsheim, 

 Ztschr. f. Hyg., 10, 1891, 331 and 12, 

 1891, 3C8; Streptococcus puerperalis 

 Arloing, Septicemie puerperale, Paris, 

 1892 (Jordan, Brit. Med. Jour, 1912, 1); 

 Staphylococcus erysipelatosHesse , Ztschr. 

 f. Hyg., 34, 1900, 3i7 ; Streptococcals longus 

 pathogenes seu erysipelatos Schottmiiller, ' 

 Munch, med. Wchnschr., 50, 1903, 909; 

 Streptococcus longus hemolyticus Sachs, 

 Ztschr. f . Hyg., 65, 1909, 466 ; Streptococcus 



longissimus Thalmann, Cent. f. Bakt., I 

 Abt., Orig., 56, 1910, 248; Streptococcus 

 hemolyticus Roily, Cent. f. Bakt., I Abt., 

 Orig., 61, 1911, 87; Streptococcus epi- 

 demicus Davis, Jour. Am. Med. Assoc, 

 58, 1912, 1852; Jour. Inf. Dis., 15, 1914, 

 378; ibid., 19, 1916, 236; Streptococcus 

 hemolysans Blake, Jour. Med. Res., 36 

 (N.S. 31), 1917, 116; Streptococcus pyo- 

 genes haemolyticus Weisenbach, Compt. 

 rend. Soc. Biol. Paris, 81, 1918, 819; 

 Streptus scarlatinae Enderlein, Sitzber. 

 Gesell. Naturf. Freunde Berlin, 1930, 

 104; Streptococcus pyogenes var. scarla- 

 tinae Hauduroy et al.. Diet. d. Bact. 

 Path., Paris, 1937, 520.) From Greek 

 pyon, pus; -genes, producing. 



Spherical or ovoid cells : 0.6 to 1 micron 

 in diameter in cultures ; usually spherical 

 in blood and inflammatory exudates ; oc- 

 curring in chains or pairs. Capsules are 

 variable, sometimes well developed and 

 can be induced. Gram-positive. 



Gelatin stab: Growth slight; minute 

 opaque colonies, little surface growth. 

 No liquefaction. 



Nutrient agar: Small colonies, trans- 

 lucent, convex, entire, slightly granular; 

 colonies are variable ; confluent growth a 

 thin transparent film; tendency for 



