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Bacterial strain changes during chronic otitis media surgery

Published online by Cambridge University Press:  11 July 2017

G J Kim ,
S Yoo ,
S Han ,
J Bu ,
Y Hong  and
D-K Kim
G J Kim
Affiliation:
Department of Otolaryngology – Head and Neck Surgery, Daejeon St Mary's Hospital, College of Medicine, Catholic University of Korea, Daejeon, Korea
S Yoo
Affiliation:
Department of Otolaryngology – Head and Neck Surgery, Daejeon St Mary's Hospital, College of Medicine, Catholic University of Korea, Daejeon, Korea
S Han
Affiliation:
Department of Otolaryngology – Head and Neck Surgery, Daejeon St Mary's Hospital, College of Medicine, Catholic University of Korea, Daejeon, Korea
J Bu
Affiliation:
Department of Otolaryngology – Head and Neck Surgery, Daejeon St Mary's Hospital, College of Medicine, Catholic University of Korea, Daejeon, Korea
Y Hong
Affiliation:
Department of Otolaryngology – Head and Neck Surgery, Daejeon St Mary's Hospital, College of Medicine, Catholic University of Korea, Daejeon, Korea
D-K Kim*
Affiliation:
Department of Otolaryngology – Head and Neck Surgery, Daejeon St Mary's Hospital, College of Medicine, Catholic University of Korea, Daejeon, Korea
*
Address for correspondence: Associate Professor Dong-Kee Kim, Department of Otolaryngology – Head and Neck Surgery, Daejeon St Mary's Hospital, College of Medicine, Catholic University of Korea, Daeheung-dong, Jung-gu, Daejeon, Korea Fax: +82 42 221 9580 E-mail: cider12@catholic.ac.kr
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Abstract

Objective:

Cultures obtained from pre-operative middle-ear swabs from patients with chronic otitis media have traditionally been used to guide antibiotic selection. This study investigated changes in the bacterial strains of the middle ear during chronic otitis media surgery.

Methods:

Pre-operative bacterial cultures of otorrhoea, and peri-operative cultures of the granulation tissue in either the middle ear or mastoid cavity, were obtained. Post-operative cultures were selectively obtained when otorrhoea developed after surgery.

Results:

Bacterial growth was observed in 45.5 per cent of pre-operative cultures, 13.5 per cent of peri-operative cultures and 4.5 per cent of post-operative cultures. Methicillin-resistant Staphylococcus aureus was identified as the most common bacteria in all pre-operative (32.4 per cent), peri-operative (52.4 per cent) and post-operative (71.4 per cent) tests, and the percentage of Methicillin-resistant S aureus increased from the pre- to the post-operative period.

Conclusion:

The bacterial culture results for post-operative otorrhoea showed low agreement with those for pre-operative or peri-operative culture, and strain re-identification was required.

Keywords

Otitis MediaBacteriologyMethicillin-Resistant Staphylococcus Aureus
Type
Main Articles
Information
The Journal of Laryngology & Otology , Volume 131 , Issue 9 , September 2017 , pp. 801 - 804
Copyright
Copyright © JLO (1984) Limited 2017 

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