**5.1.7 Statistical analyses**

The experimental results were expressed as mean ± standard deviation (STD) of triplicate experiments. Statistical differences between the antibiotics and inhibition zones formed by the plant extract were detected by analysis of variance (ANOVA) using SPSS 19.0 statistical software (SPSS, Chicago, Illinois, USA) followed by the Tukey test for multiple comparisons between means. P values lower than 0.05 (p < 0.05) were considered significantly different whereas P values lower than 0.01 (p < 0.01) were considered highly significant.
