Deoxyribonucleic acid fingerprinting in an outbreak of Staphylococcus aureus intracranial infection after neurotologic surgery

Background: Meningitis is the most common life-threatening infection occurring as an early postoperative complication of neurotologic surgery. From January to March 2001, Staphylococcus aureus intracranial infection developed in three patients: two cases were consecutive. Methods: All staff members involved in surgery on any of the three patients had nasal swabs for S. aureus. The three patient isolates and all S. aureus isolates from staff members were typed by pulsed-field gel electrophoresis. Operating room procedures were reviewed. Results: All three patient isolates were identical by pulsed-field gel electrophoresis. Six staff members (40%) were found to be S. aureus carriers, The isolate from one staff members was identical to the patient isolates. A procedure audit of the operating room revealed several breaks in recommended practice. The staff carrier was immediately removed from patient care duties. given decolonization therapy. and treated for chronic rhinosinusitis Practice changes in the operating room were implemented. Conclusions: S. aureus remains a common cause of site infection. S. aureus carriage is common, and carriers with intercurrent respiratory infection,., hake increased shedding and are a higher risk to patients. Proper use of barrier devices and consistent hand hygiene reduce bacterial contamination of the wound. Current operating room technology involves technical personnel not traditionally trained in operating room procedures. Epidemiologic investigation may be delayed if operating room record.,, are incomplete with respect to these personnel. Molecular typing of bacterial isolates can identify common source outbreaks and effectively focus investigations.