Binding of FITC-labeled recombinant Pv to microbial cells. A, D, and G, binding of FITC-labeled recombinant Pv to E. coli, A. hydrophila, and S. aureus. B, E, and H, binding of FITC-labeled rPv to E. coli, A. hydrophila, and S. aureus was weakened in the presence of nonlabeled rPv. C, F and I, no binding of FITC-labeled BSA to E. coli, A. hydrophila and S. aureus. Insets show the corresponding bright field images. Scale bars represent 20 μm.