Fig. 3

PCR detection of virulence factor-encoding genes (VFGs) from Bb isolates. A Agarose gel analysis of the betA (band 2, 474Â bp), fhaB (band 3, 475Â bp), cyaA (band 1, 377Â bp), dnt (band 4, 491Â bp), and prn (band 5, 555Â bp) PCR products. B Positive rate of 5 VFGs. C Number of strains containing different VFGs. X-axis: Number of Bb strains; Y-axis: Different VFGs