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. 2021 Sep 8;31(12):1656–1666. doi: 10.4014/jmb.2106.06008

Table 5.

FIC index of combinations among CME-CuNPs and clindamycin against tested strains.

Bacterial isolates FIC index
MIC1 0.500 (S)
BAC1 0.312 (S)
PSE5 0.312 (S)

An FIC index of < 0.5 indicates synergism (S), > 0.5–1 indicates additive effects (AD), > 1 to < 2 indifference (ID), and ≥ 2 is considered to be antagonism (AN).