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. 2019 Jun 12;10:1248. doi: 10.3389/fmicb.2019.01248

Figure 1.

Figure 1

Ten unknown bacterial strains from healthy pig feces significantly inhibited the growth of E. coli in vitro. (A,B) Inhibiting effect on E. coli of total 35 unknown bacterial strains isolated from the healthy pig feces. E. coli strain 4–1 was maintained on bouillon agar medium (108 CFU/ml); the Oxford cup with 80 μl single bacterial culture fluid was placed in the middle. After 24 h, the inhibitory ring was observed and measured with ruler. (C) The No. 1 unknown bacterial strain significantly inhibited the growth of E. coli. E. coli strain 4–1 was maintained on bouillon agar medium (108 CFU/ml); the Oxford cups with 80 μl of No. 1 unknown bacterial culture fluid containing different amounts of 1.8 × 108, 3.6 × 108, and 7.2 × 108 CFU/ml were placed in the middle. The inhibitory rings were observed and measured with a ruler. Data are representative of three independent experiments. Data are represented as mean ± SD, n = 3. ****p < 0.0001.