FIG. 2.

Prevention of morphological damage to antibiotic-sensitive bacteria during growth with a resistant strain. Biofilms of each strain alone or the two strains grown together were imaged by CLSM. Representative images of the substratum are shown. A: Spt^r strain in LB broth. B: Spt^r strain in LB broth plus 8 ppm ampicillin. C: Amp^r and Spt^r strains in LB broth plus 8 ppm ampicillin. D: Amp^r strain in LB broth. E: Amp^r strain in LB broth plus 20 ppm spectinomycin. F: Amp^r and Spt^r strains in LB broth plus 20 ppm spectinomycin. Magnification, ×400.