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. 2022 Aug 23;15(8):2021–2028. doi: 10.14202/vetworld.2022.2021-2028

Figure-3.

Figure-3

Extended-spectrum beta-lactamase-producing E. coli by double-disk synergy test (DDST)-positive result (red arrows showed positive synergy or keyhole effect). Note: Antibiotics disks used for DDST were amoxicillin-clavulanate (20/10 μg), cefotaxime (30 μg), and ceftazidime (30 μg).