title: Hyaluronidase production by groups A, B, C, and G streptococci: a statistical analysis.
abstract: Production of hyaluronidase by 147 strains of beta hemolytic streptococci was studied employing a sensitive dye-binding assay and levels of enzyme activity were evaluated statistically. The analysis of variance showed that group A strains isolated in Rio de Janeiro produced significantly smaller amounts of enzyme than group A strains from a Minneapolis (USA) collection or than groups B and G brazilian isolates. The t test revealed that M not typable nose/throat group A strains produced more hyaluronidase than skin isolates. The analysis of variance did not show a significant difference in the enzyme production between M typable and not typable brazilian strains of group A streptococci. High enzyme--producing strains were not restricted to a few serotypes of group B streptococci.
mesh_terms: D000704:Analysis of Variance; D006801:Humans; D006821:Hyaluronoglucosaminidase / Q000096:biosynthesis*; D009666:Nose / Q000382:microbiology; D010614:Pharynx / Q000382:microbiology; D012867:Skin / Q000382:microbiology; D013045:Species Specificity; D013053:Spectrophotometry; D013290:Streptococcal Infections / Q000382:microbiology; D013291:Streptococcus / Q000201:enzymology*; D013292:Streptococcus agalactiae / Q000201:enzymology; D013297:Streptococcus pyogenes / Q000201:enzymology
chemical_list: D006821:Hyaluronoglucosaminidase