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. 2022 Mar 29;9:819921. doi: 10.3389/fvets.2022.819921

Figure 1.

Figure 1

Detection of the bactericidal activity of the antimicrobial peptide MPX. (A) The agar diffusion test of the antimicrobial activity of MPX against S. aureus ATCC 25923. (B) MIC results. S: S. aureus ATCC 25923; N: blank LB medium. (C) OD600 measurement of bacterial culture after the action of MPX for different times. (D) The determination of the number of viable bacteria after the action of MPX for different times. (E) Scanning electron microscopy observation of the effect of MPX on S. aureus ATCC 25923. The left picture shows the normal morphology of S. aureus, and the right picture shows the bacterial morphology of S. aureus after MPX (1×MIC) exposure. (F) Transmission electron microscopy observation of the effect of MPX on S. aureus ATCC 25923. The left picture shows the normal morphology of S. aureus, and the right picture shows the bacterial morphology of S. aureus after MPX (1×MIC) exposure. Error bars indicate the mean ± SEM, n = 3. Statistical significance was defined as **p < 0.01 and ***p < 0.001.