FAMILY LACTOBACTERIACEAE 



335 



and some greening. No soluble hemol- 

 ysin. 



Fibrinolysin : No solution of human 

 fibrin. 



Serology: Group H. 



Aerobe, facultative anaerobe. 



Source: Human throat and feces. 



Habitat : Human throat. 



5. Streptococcus sp. Hare. (Group 

 K, Hare, Jour. Path, and Bact., 4^> 

 1935, 499.) 



Spheres: Gram-positive. 



Blood agar: Colonies 0.8 to 1.3 mm, 

 moist and transparent, with crenated 

 edges. Incomplete hemolysis and no 

 alpha-prime appearance. 



Acid from glucose, lactose and salicin; 

 may foi'm acid from trehalose (doubtful ) . 

 No acid from mannitol or sorbitol. 



Does not hydrolyze sodium hippurate. 



Chemical tolerance : Final pH in glu- 

 cose broth 5.1 to 5.4. Does not grow on 

 10 per cent and 40 per cent bile-blood 

 agar. 



Action on blood : Incomplete hemol- 

 ysis ; does not produce soluble hemolysin. 

 Doubtful if truly hemolytic strepto- 

 coccus. 



Fibrinolysin : Does not dissolve human 

 fibrin. 



Serology : Group K. 



Aerobe, facultative anaerobe. 



Source : Human throat. 



Habitat: Human throat. No indica- 

 tion of relation to disease. 



6. Streptococcus acidominimus Ayers 

 and Mudge. (Ayers and Mudge, Jour. 

 Inf. Dis., 31, 1922, 40; S3, 1923, 155.) 

 From M. L., derived to mean a minimum 

 amount of acid. 



Description taken from Smith and 

 Sherman, Jour. Inf. Dis., 65, 1939, 301. 



Spheres: Generally occur in short 

 chains. Gram-positive. 



Gelatin stab : Filiform, beaded growth. 

 No liquefaction. 



Plain nutrient agar : Small round white 

 colonies. 



Acid from glucose, lactose and sucrose. 

 May form acid from maltose, trehalose, 

 and mannitol. Sorbitol and salicin 

 usually are not fermented. No acid from 

 arabinose, xylose, raffinose, inulin and 

 glycerol. 



Sodium hippurate is hydrolyzed but 

 not starch. 



Carbon dioxide is produced from a 4 per 

 cent peptone-infusion broth. 



Litmus milk: Little or no visible 

 change. 



Ammonia is not produced from 

 peptone. 



Temperature relations : No growth at 

 10°C. A few cultures grow at 45°C. 

 Do not survive 60°C for 30 minutes. 



Chemical tolerance : No growth in .01 

 per cent methylene blue. Growth in 2 

 per cent but not in 6.5 per cent NaCl. 

 Final pH in glucose broth 6.5 to 5.6. 

 No growth at pH 9.6. 



Action on blood: No hemolysis, slight 

 greening (alpha). 



Serology: Negative reaction with 

 serums representing Lancefield groups A, 

 B,C,D,E,FandG. 



Facultative anaerobe. 



Distinctive character: Small amount 

 of acidity developed in fermentation 

 tests. 



Source : Originally 12 cultures were 

 isolated from freshly drawn milk. Also 

 found in bovine vagina, occasionally in 

 the udder, and on the skin of calves. 



Habitat: Known to occur abundantly 

 in the bovine vagina. 



The relationship between Streptococcus 

 uberis Diernhofer and other similar strep- 

 tococci is not yet entirely clear. Smith 

 and Sherman (Jour. Inf. Dis., 65, 1939, 

 301-305) at one time thought that Strep- 

 tococcus uberis and Streptococcus aci- 

 dominimus might be identical. Others 

 have regarded Streptococcus uberis as 

 identical with Group III, Minett (Proc. 

 12th Internat. Vet. Cong., 2, 1934, 511). 



Brown (Proc. 3rd Internat. Cong, for 

 Microbiol., 1940, 173) describes a new 

 species, Streptococcus lentus (not Strep- 



