The severity of skin and soft tissue infections caused by group A Streptococcus (GAS) is
variable, and there are only a limited number of studies evaluating the characteristics of …

Streptolysin S (SLS) is a serum-extractable and oxygen-stable hemolysin produced by
Group A Streptococcus. A SLS-deficient mutant in which transposon Tn 916 was inserted in …

Group A streptococci have a virulence regulon containing a single emm locus or two or three
distinct and adjacent loci of structurally related emm family genes. The products of the emm …

Among nonhemolytic Streptococcus pyogenes (group A streptococcus) strains (n= 9)
isolated from patients with pharyngitis or acute otitis media, we identified three deletions in …

The streptococcal cysteine protease (SpeB) is one of the major virulence factors produced
by group A streptococci (GAS). In this study we investigated if differences exist in SpeB …

Sensitive spectrophotometric assays for the detection of bacterial chondroitin sulfate
depolymerase and hyaluronidase activities were developed by using Stains-all (1-ethyl-2-[3 …

In this study, we isolated four bacterial strains grown on mitis-salivarius sucrose bacitracin
agar. The strains had similar biochemical characteristics to biotypes I or II of mutans …

Neuraminic acid is thought to be a critical virulence factor of group B streptococci. The
present study was designed to further characterize a previously described type III group B …

In many countries, M1 strains of the human pathogenic bacterium group A Streptococcus are
the most common serotype recovered from patients with invasive disease episodes. Strains …

Systemic pathogens have developed numerous strategies for evading the defenses of the
host, permitting dissemination and multiplication in various tissues. One means of survival in …