SrrG mutation frequency and positions.
(a) SrrG and/or CsrS/CsrR mutation frequency among S. dysgalactiae subsp. equisimilis isolates from 79 STSS and 34 non-invasive infections. Twenty-five (31.6%) of STSS isolates harboured SrrG and/or the CsrS/CsrR mutations, while no non-invasive disease isolate carried a mutation in the srrG gene. WT indicates intact SrrG and CsrS/CsrR. Numbers above bars indicate the percentages, and number in the boxes indicate the number of isolates. (b) SrrG sequence variations. Labels refer to nucleotide positions, and numbers above boxes indicate nucleotide number.