Table 4. Measurement of the inhibition zone of B. licheniformis-fermented product-derived surfactin on C. perfringens growth at different concentrations.

Concentration (µg/mL)	Zone of inhibition (cm)1
7.8	0.3±0.01a
15.61	0.3±0.01a
31.25	0.4±0.01b
62.5	0.5±0.02b
125	0.7±0.04c
250	0.9±0.02d

¹Data are expressed as mean±standard deviation (n=3).

Different letters indicate a statistically significant difference between groups (P<0.05).