TABLE 3.

Perfringolysin O activities of various C. perfringens strains

StrainGenotypePerfringolysin O titer (log2)aDifference (fold) compared to strain 13
13Wild type7.4 ± 0.51
TS133Strain 13 virR::Tetr2.0 ± 0.1<0.1
TS190Strain 13 ΔvirT9.4 ± 0.53.9
TS190(pTS930)Strain 13 ΔvirT (virT +)7.7 ± 0.41.2
13(pTS931)Strain 13 (virU +)9.5 ± 0.74.3
  • a Each value was calculated by using the results of triplicate independent experiments, and the values are means ± standard deviations.