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. 2026 Jul 24;75(7):002189. doi: 10.1099/jmm.0.002189

Fig. 4. Antibiotic disc diffusion assays comparing A. baumannii AB5075 wild-type (WT, a) and Δp1AB5075 (b) strains carrying pWH1266 or pWH1266-blaGES-11 (c). CAZ (ceftazidime, 30 µg), CFP (cefoperazone, 30 µg), FEP (cefepime, 30 µg), ATM (aztreonam, 30 µg), C (chloramphenicol, 30 µg), CIP (ciprofloxacin, 5 µg). MH2 agar plates containing tetracycline were lawned with wild-type A. baumannii AB5075 and Δp1AB5075 and antibiotic-containing discs were placed on the agar surface. The plates were incubated for 24 h at 37 °C.

Disc diffusion plates show Δp1AB5075 with pWH1266 having large inhibition zones around CAZ, FEP, and ATM, while blaGES-11 expression restores resistance, matching the wild-type pattern with minimal zones.