FIG 5.

Virulence assessment of emm type stG62647 strains MGCS36044 and MGCS36089 and stC74a strain MGGS36055 in a mouse model of necrotizing myositis. (A) Kaplan-Meier survival curves are shown. Survival was monitored for 7 days (log-rank test, n = 20 mice per strain). (B and C) CFU recovery from infected limbs was performed on day 1 and day 2 after infection. Replicate data are expressed as means ± SEM (Kruskal-Wallis test, n = 20 mice per strain). (D) Gross and microscopic examination of infected limbs on day 2 postinfection. Lesion size and necrotic tissue are highlighted (black boxes).