Source of Support: None, Conflict of Interest: None
An outbreak of Serratia marcescens infection involving incisional wounds in six orthopaedic patients occurred during March and April, 1994. All these patients were receiving postoperative antibiotic combination of gentamicin and cloxacillin. Epidemiological search for the source of infection revealed isolation of S. marcescens from the floor of the sideroom of the orthopaedic ward where the two index cases were housed and in the urine of one of the index cases. The patientsâ€™ isolates and the floor isolate were similar in nonpigmentation, biochemical profile and multiple antibiotic resistance. The wound infections responded to change of antibiotic and disinfections of side room and ward. S. marcescens was not isolated in subsequent wound sampling form the same ward in the consecutive twenty admissions over the next eight weeks.