Fig. 4From: Antimicrobial and antibiofilm potentials of cinnamon oil and silver nanoparticles against Streptococcus agalactiae isolated from bovine mastitis: new avenues for countering resistanceComparative measurement of the transcription (cDNA abundance) of biofilm associated genes (pilA and pilB) and their regulator (rogB) in strong biofilm producing S. agalactia isolates (codes No. 3 and 10; Table 2) after treatment with MBIC50 values of cinnamon oil (2, 4 μg/mL), silver nanoparticles (32, 64 μg/mL) and their combination (1/2, 8/16 μg/mL), respectively. The data are presented as fold changes in gene expressions normalized to an endogenous housekeeping gene (gyrA) and relative to the untreated control isolate, which was assigned a value of 1.Error bars indicate standard deviations. Double asterisks (**) represent the means significantly different from control untreated isolate (P < 0.05). Pearson’s correlation indicates the positive correlations of rogB transcript levels and biofilm biosynthesis genes at r ≥ 0.3Back to article page