title: Nasal Colonization of Methicillin-Resistant Staphylococcus aureus in Patients with Chronic Suppurative Otitis Media.
abstract: OBJECTIVE
  Methicillin-resistant Staphylococcus aureus (MRSA) is one of major pathogens in patients with chronic suppurative otitis media (CSOM). In addition to intrinsic MRSA infection of the mastoid air cell system, nasal colonization of MRSA, a known predictor of postoperative surgical site infection, may pose increased risk of postoperative complications. The purpose of this study is to describe microbiology of preoperative nasal swab screening and localized middle ear specimens in patients undergoing otologic surgeries.
  
  
  METHODS
  Forty-nine consecutive patients with CSOM who underwent middle ear surgery were included. Preoperative nasal swabs for MRSA, and preoperative and intraoperative middle ear swabs were collected and compared for pathogens.
  
  
  RESULTS
  Preoperative nasal swab screening confirmed MRSA colonization in 3/49 patients (6.1%) and methicillin-resistant coagulase-negative Staphylococcus (MRCNS) in 9/49 patients (18.4%). Correlation with preoperative culture results and nasal swab screening results were compatible in 2/4 patients with positive nasal swab for MRSA and 1/9 patients with positive nasal swab for MRCNS. Postoperative conversion to MRSA was observed in 3 patients.
  
  
  CONCLUSIONS
  The rate of nasal MRSA colonization among patients with CSOM was higher than among the general community. Preoperative MRSA colonization was associated with MRSA from middle ear specimens. Further studies are warranted to investigate the possible benefit of preoperative treatment of MRSA colonized patients undergoing middle ear surgeries.
authors.affiliation: Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea.
authors.forename: Eun Jung
authors.initials: EJ
authors.lastname: Lee
authors.affiliation: Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea.
authors.forename: Jin Ho
authors.initials: JH
authors.lastname: Kwon
authors.affiliation: Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea.
authors.forename: Ah Young
authors.initials: AY
authors.lastname: Park
authors.affiliation: Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea.
authors.forename: Won-Sang
authors.initials: WS
authors.lastname: Lee
authors.affiliation: Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea.
authors.forename: Eun Jin
authors.initials: EJ
authors.lastname: Son
keywords: Culture; Methicillin-resistant Staphylococcus aureus; Otitis media