Table 1. Four mixed antibiotics

Antibiotics in 1 mL	Class	Bacterial targets
Ampicillin(1.75 mg/day, Sigma-Aldrich, USA)	Penicillin	Broad spectrum for both Gram-positive and Gram-negative. Inhibit cell wall synthesis.
Neomycin sulfate(1.75 mg/day, Amresco, USA)	Aminoglycoside	Broad spectrum for both Gram-positive and Gram-negative. Inhibit protein synthesis.
Vancomycin(0.875 mg/day, Sigma-Aldrich, USA)	Glycopeptide	Narrow spectrum for coccus Gram-positive and Gram-negative. Inhibit cell wall synthesis.
Metronidazole(1.75 mg/day, Sigma-Aldrich, USA)	Nitroimidazole	Broad spectrum for both Gram-positive and Gram-negative and also protozoa. Inhibit nucleic acid synthesis.