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Bacillus licheniformis-fermented-product-derived surfactin inhibits E. tenella oocyst sporulation in vitro. E. tenella oocysts were treated with 2% K2Cr2O7 in combination with 100 μg/mL of surfactin at 25 °C for 12, 24, 48, and 72 h. Magnification was 400×. Three experiments (n = 3) were carried out, and one representative experiment is shown.
