the in-vitro rate constants of the cellular uptake and elimination of the antimicrobial agents josamycin ( wilprafen ) , erythromycin and tetracycline were measured in normal human polymorphonuclear leucocytes ( pmns ) using the velocity gradient centrifugation technique with radiolabelled drugs at extracellular concentrations corresponding to therapeutically effective serum levels .
C1136254
antimicrobial agents
C0014806
erythromycin