Fig. 5From: The QseB/QseC two-component system contributes to virulence of Actinobacillus pleuropneumoniae by downregulating apf gene cluster transcriptionQuantitative determination of biofilm formation. WT S4074, ΔqseBC, ΔapfA, ΔapfB, ΔapfC and ΔapfD strains were grown in BHI at 37 °C. OD590 of the bacterial biofilm were measured after 72 h of incubation. Data are shown as mean ± SD (N = 3). *P < 0.05Back to article page