highly significantp < 0.01
For example, in a study conducted to evaluate the carvacrol-erythromycin synergistic effect against erythromycin-resistant Group A Streptococci, highly significant synergy (FIC Index ≤ 0.5, p < 0.01) was detected in 21 out of 32 strains ( Magi et al., 2015 ).