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. 2017 Jun 29;12(6):e0179776. doi: 10.1371/journal.pone.0179776

Fig 1. Schematic of the set-up for a three-dimensional checkerboard technique.

Fig 1

Diagram depicts the design of the 96-well test plates to include 3 different antibiotics. Each plate has a fixed concentration of PAAG or ceftazidime. Each plate also has a standard checkerboard of meropenem vs tobramycin. The arrows indicate increasing concentrations of each antimicrobial drug. The diagram is adapted from Stein et. al., 2015 [38].