bacterial colonization Article 15 nonhuman 14 human 10 controlled study 9 biofilm 7 Animals 6 Biofilms 6 Humans 6 animal 6 bacterium isolation 5 Staphylococcus aureus 4 animal experiment 4 bacterial load 4 bacterial strain 4 colony forming unit 4 drug effect 4 genetics 4 in vivo study 4 male 4 microbiology 4 physiology 4 Dental Plaque 3 Mice 3 Porphyromonas gingivalis 3 adult 3 animal model 3 antibiotic agent 3 antibiotic sensitivity 3 bacterial growth 3