Figure 3

Biofilm formation of bacterial pathogens involved in the porcine respiratory disease complex (PRDC) and Streptococcus suis isolates belonging to the four main serovars (SVs). Boxplots illustrating biofilm formation for each isolate, quantified as the difference from the negative control (DC) in absorbance (OD595). Each isolate is represented by a dot with horizontal jitter for visibility. The horizontal box lines represent the first quartile, the median, and the third quartile. Whiskers extend to 1.5 times the interquartile range.