Antibiotic resistance rates of colistin resistant gram-negative bacteria and a comparison of etest and vitek2 in evaluation of colistin resistance

Bayırlı-Turan D., GÜMÜŞ D., KALAYCI YÜKSEK F., Gümüş A., Şerefhanoğlu K., Ang-Küçüker M.

Acta Microbiologica Bulgarica, vol.34, no.1, pp.52-54, 2018 (Scopus) identifier

  • Publication Type: Article / Article
  • Volume: 34 Issue: 1
  • Publication Date: 2018
  • Journal Name: Acta Microbiologica Bulgarica
  • Journal Indexes: Scopus
  • Page Numbers: pp.52-54
  • Keywords: Colistin, Etest, Multi drug resistance, VITEK2
  • İstanbul Yeni Yüzyıl University Affiliated: Yes

Abstract

In the present study we aimed to investigate antibiotic resistance rates in colistin resistant bacteria; and also to compare two methods (Etest and VITEK 2) for detection of colistin resistance. A total of 56 strains were defined as colistin resistant according to VITEK2. Among the 56 colistin resistant strains, only 40 (71.4%) of them were defined as resistant according to Etest method. 34 (85%) out of these 40 strains were identified as K. pneumoniae. The resistance rates were detected for ciprofloxacin, meropenem and ceftazidime as 100%, 97.5% and 95% respectively for all colistin resistant strains. Among the 16 colistin susceptible strains, the resistance to ciprofloxacin, meropenem and ceftazidime were found as 100%, 87.5% and 81.25 respectively.