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Table 3 Combined antimicrobial effect (FIC index) of the Natto peptide and other antimicrobial agents

From: Novel antimicrobial activities of a peptide derived from a Japanese soybean fermented food, Natto, against Streptococcus pneumoniae and Bacillus subtilis group strains

Antibiotic

FIC index

Amoxicillin

2

Cefditoren

2

Tebipenem

2

Levofloxacin

2

Clarithromycin

1.38

Amikacin

1.09

Tobramycin

2

Gentamicin

2