Figure 5

Phenotypic analyses. Picture A: The growth curves of LCT-KP214 and LCT-KP289 were determined by measuring OD600 values, which represent the concentration of the bacterial population. The growth curves of LCT-KP214 and LCT-KP289 were nearly identical. Picture B: The antibiotic resistance phenotypes were characterized by diffusion tests. The diameter of the zone of inhibition was measured for each antibiotic, and the drug was applied in a 0.6-cm diameter circle. If the diameter of the zone of inhibition of an antibiotic was 0.6 cm after incubation of the bacterial plate, the strain was considered resistant to the antibiotic. The data showed that LCT-KP289 was resistant to sulfamethoxazole, but LCT-KP214 was not.