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Table 2 Combination interaction of phenolic compounds with commercial antibiotics against Salmonella enterica serovar Typhimurium (ATCC14028)

From: In vitro synergistic potentials of novel antibacterial combination therapies against Salmonella enterica serovar Typhimurium

Drug Combinations

FIC Index (X)

Galic acid + Ampicillin

0.625 (A)

Galic acid + Amoxicillin

1.004 (I)

Galic acid + Ceftiofur

0.563 (A)

Galic acid + Penicillin G

1.016 (I)

Galic acid + Cefotaxime

1.004 (I)

Galic acid + Erythromycin

1.001 (I)

Galic acid + Thiamphenicol

0.625 (A)

Galic acid + Marbofloxacin

1.002 (I)

Hamamelitannin + Ampicillin

1.002 (I)

Hamamelitannin + Amoxicillin

1.001 (I)

Hamamelitannin + Ceftiofur

0.625 (A)

Hamamelitannin + Penicillin G

1.004 (I)

Hamamelitannin + Cefotaxime

0.563 (A)

Hamamelitannin + Erythromycin

1.001 (I)

Hamamelitannin + Thiamphenicol

1.002 (I)

Hamamelitannin + Marbofloxacin

0.563 (A)

Epicatechin + Ampicillin

0.750 (A)

Epicatechin + Amoxicillin

1.001 (I)

Epicatechin + Ceftiofur

0.625 (A)

Epicatechin + Penicillin G

1.004 (I)

Epicatechin + Cefotaxime

0.750 (A)

Epicatechin + Erythromycin

1.016 (I)

Epicatechin + Thiamphenicol

1.016 (I)

Epicatechin + Marbofloxacin

1.004 (I)

Epicatechin gallate + Ampicillin

0.563 (A)

Epicatechin gallate + Amoxicillin

1.002 (I)

Epicatechin gallate + Ceftiofur

1.001 (I)

Epicatechin gallate + Penicillin G

0.502 (A)

Epicatechin gallate + Cefotaxime

1.004 (I)

Epicatechin gallate + Erythromycin

0.500 (S)

Epicatechin gallate + Thiamphenicol

0.504 (A)

Epicatechin gallate + Marbofloxacin

1.008 (I)

Epigallocatechin + Ampicillin

1.001 (I)

Epigallocatechin + Amoxicillin

1.004 (I)

Epigallocatechin + Ceftiofur

0.625 (A)

Epigallocatechin + Penicillin G

1.008 (I)

Epigallocatechin + Cefotaxime

0.502 (A)

Epigallocatechin + Erythromycin

0.516 (A)

Epigallocatechin + Thiamphenicol

1.004 (I)

Epigallocatechin + Marbofloxacin

0.502 (A)

  1. FIC, fractional inhibitory concentration; Synergy, X ≤ 0.5; Additive, 0.5 < X ≤ 1; Indifferent, 1 < X ≤ 2; Antagonist, X > 2; (A), (I) and (S) stand for Additive, Indifferent and Synergy, respectively