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Double disk synergy of EFNTE with commercial antibiotics against S. typhimurium KCTC 2515. EAF: ethyl acetate fraction of N. tetragona 50% methanol extract; TMR: trimethoprim; NOR: norfloxacin; MAR: marbofloxacin; AMP: ampicillin; STR: streptomycin; and TYL: tylosin. Red arrows indicate synergistic interactions.
