Research Article

Chemical Composition, Antibacterial Activity, and Antibiotic Potentiation of Boswellia sacra Flueck. Oleoresin Extracts from the Dhofar Region of Oman

Figure 6

Isobologram for combinations of Houjari (extraction method 2) methanolic extract in with tetracycline against A. baylyi. The extract and antibiotic were tested at various ratios against, and results represent mean FIC values of four replicates (n = 4). Ratio = % extract:% antibiotic. Ratios lying on or underneath the 0.5 : 0.5 line are considered synergistic (ΣFIC ≤ 0.5). Any points between the 0.5 : 0.5 and 1.0 : 1.0 lines are deemed additive (ΣFIC > 0.5–1.0).