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2013, Cilt 43, Sayı 1, Sayfa(lar) 022-025
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Antimicrobial Resistance in Clinical Strains of Stenotrophomonas maltophilia
Yeliz TANRIVERDİ ÇAYCI1, Adil KARADAĞ2, Hava YILMAZ3, Keramettin YANIK2, Murat GÜNAYDIN2
1Ankara Meslek Hastalıkları Hastanesi, Mikrobiyoloji Laboratuvarı, Ankara
2Ondokuz Mayıs Üniversitesi Tıp Fakültesi, Tıbbi Mikrobiyoloji Anabilim Dalı, Samsun
3Ondokuz Mayıs Üniversitesi Tıp Fakültesi, Enfeksiyon Hastalıkları ve Klinik Mikrobiyoloji Anabilim Dalları, Samsun
Keywords: Antibiotic, resistance, Stenotrophomonas maltophilia

Objective: Stenotrophomonas maltophilia is an opportunistic pathogen of increasing importance. It's known that S. maltophilia can cause several different infections and it is mostly isolated from respiratory tract, bloodstream, wound and urinary tract specimens. Since it is intrinsically resistant to many antimicrobial agents, the treatment of S. maltophilia infections is quite difficult. The aim of this study was to investigate the distribution and antimicrobial susceptibility patterns of S. maltophilia strains isolated during a seven year period.

Materials and Methods: The antimicrobial susceptibility patterns of 566 S. maltophilia strains isolated during a period of seven years (2006-2012) were analyzed retrospectively. Identification and antimicrobial susceptibilities of the isolates were determined by Vitek2 Compact (Biomeriux, France) and Phoenix (BD, USA) automated systems.

Results: S. maltophilia strains were isolated mostly from the internal medicine clinic (n=141). Lower respiratory tract specimens (n=283) were the most common specimens that S. maltophilia strains were isolated. The rates of antimicrobial resistance (intermediate and resistant) were as follows: trimetoprim-sulphamethoxazole 7.2% (n=41), levofloxacin 11.5% (n=65), and ceftazidime 53.5% (n=303).

Conclusion: Antimicrobial resistance rates of S. maltophilia strains vary among healthcare centers. In view of the varying resistance rates, requirement for active and comprehensive antimicrobial surveillance systems might be suggested..


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