Specific bacterial cell wall components stabilize CVB3. (A) We incubated 105 PFU of CVB3 in 1-mg/ml concentration of either LPS or PGN from indicated bacterial species at 42°C for 1 h. PBS and mannan were used as controls. (B) We incubated 105 PFU of CVB3 in increasing concentrations from 0.25 mg/ml to 1 mg/ml of LPS or mannan at 42°C for 1 h. For all, data represent 4 to 5 experiments (n = 8 to 10), and bars represent mean ± SEM. *, P < 0.05; **, P < 0.01; ****, P < 0.0001; one-way ANOVA.