Gram positive bacterium Article 15 Gram negative bacterium 15 nonhuman 13 antiinfective agent 12 controlled study 12 Gram-Positive Bacteria 11 Gram-Negative Bacteria 10 Anti-Bacterial Agents 8 Escherichia coli 8 Staphylococcus aureus 7 chemistry 7 human 7 antibacterial activity 6 bacterial strain 6 minimum inhibitory concentration 6 unclassified drug 6 Microbial Sensitivity Tests 5 drug effect 5 microbial sensitivity test 5 Humans 4 antimicrobial activity 4 scanning electron microscopy 4 Anti-Infective Agents 3 Antibacterial 3 Antibacterial activity 3 Bacteria 3 Biofilms 3 Listeria monocytogenes 3 ampicillin 3