The combination of erythromycin and colistin against Serratia marcescens.
D003091:Colistin / Q000494:pharmacology*; D004357:Drug Synergism; D004917:Erythromycin / Q000494:pharmacology*; D012706:Serratia marcescens / Q000187:drug effects*
D004917:Erythromycin; D003091:Colistin