zone of inhibition Article 11 nonhuman 11 controlled study 10 Escherichia coli 6 Staphylococcus aureus 6 disk diffusion 6 human 6 antibacterial activity 5 antimicrobial activity 5 minimum inhibitory concentration 5 antibiotic resistance 4 bacterial growth 4 bacterial strain 4 bacterium identification 4 Klebsiella pneumoniae 3 Streptococcus mutans 3 ampicillin 3 antibiotic sensitivity 3 bacterial cell 3 bacterium culture 3 bacterium isolate 3 bacterium isolation 3 colony forming unit 3 in vitro study 3 minimum bactericidal concentration 3 phenotype 3 plant extract 3 unclassified drug 3 Antibacterial 2