Mouse skin passage of a Streptococcus pyogenes Tn917 mutant of sagA/pel restores virulence, beta-hemolysis and sagA/pel expression without altering the position or sequence of the transposon

Table 2 Phenotypic analysis of wild type Streptococcus pyogenes isolate CS101, an isogenic sagA/pel::Tn 917 mutant and a kidney-recovered variant of the sagA/pel::Tn917 mutant.

++ = > 50% more than the wild type + = wild type levels ± = 15 – 30% of the wild type level - = < 10% of the wild type

ISSN: 1471-2180