Kinetic interaction of biofilm cells of Staphylococcus aureus with cephalexin and tobramycin in a chemostat system.
Planktonic and young biofilm cells were completely eradicated after exposure of these cells to drug levels representing one loading and two maintenance doses of tobramycin and cephalexin. A very different picture was observed when antibiotic exposure was initiated on day 21. Complete eradication of the old biofilm cells was not observed even when the antibiotic exposure was continued for an extra 6 days. Regrowth of the organism was observed when the antibiotic exposure was terminated.
Anwar
H
H
Department of Microbiology, University of Alberta, Edmonton, Canada.
Strap
J L
JL
Costerton
J W
JW
D002470:Cell Survival / Q000187:drug effects; D002506:Cephalexin / Q000493:pharmacokinetics*; D013211:Staphylococcus aureus / Q000187:drug effects*; D014031:Tobramycin / Q000493:pharmacokinetics*
D002506:Cephalexin; D014031:Tobramycin