THE PRODUCTION OF HYALURONIDASE BY LANCEFIELD'S GROUP B STREPTOCOCCI

The production of hyaluronidase by Lancefield's Group B streptococci.

Serotypes of group B streptococci and their relation to hyaluronidase production and hydrolysis of salicin.

A total of 252 strains of group B streptococci were serotyped and examined for their ability to ferment lactose (lac+), to hydrolyze salicin (sal+), and to produce hyaluronidase (hy+). Of these strains, 67 had been isolated from bacteremia and meningitis in infants less than 2 months old. Eighty-one strains were isolated from bacteremia and meningitis in adults, and 104 strains were from variou...

The production of capsules, hyaluronic acid and hyaluronidase by 25 strains of group C streptococci.

Of the 25 group C streptococci examined all but 8 produced a hyaluronidase detectable in a sensitive turbidimetric test. These 8 strains and 6 of the hyaluronidase producers were heavily capsulated on serum glucose agar and in serum+glucose enriched liquid media. The capsules of all strains were readily destroyed by testicular hyaluronidase. In continually neutralized cultures of the capsulated...

Bacteriocine Production by Group a Streptococci

I t has been known for many years t ha t some strains of Escherichia coli, Bacillus megaterium, and Group D streptococci secrete substances called colicines, or bacteriocines, which inhibi t the growth of o ther strains of closely related microorganisms (1-6). In 1949 Sherwood and his coworkers (7) reported observations on the inhibitory action of certain strains of be ta hemolyt ic streptococc...

New medium for enhancing pigment production of group B streptococci.