2018, Cilt 48, Sayı 1, Sayfa(lar) 066-071 |
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Quantitative Determination of Antibiotic-Susceptibility Rates of Non-Fermentative Bacteria Isolated from Blood Cultures |
Fatih ATEŞ, Nurullah ÇİFTÇİ, İnci TUNCER, Hatice TÜRK DAĞI |
Selçuk Üniversitesi Tıp Fakültesi, Tıbbi Mikrobiyoloji Anabilim Dalı, Konya |
Keywords: Acinetobacter, antibiotic susceptibility, blood culture, nonfermentative, Pseudomonas |
Objective: Non-fermentative gram- negative bacteria are
detected as agents of serious nosocomial infections. The
aim of this study is to determine the distribution of nonfermentative
gram-negative bacteria isolated from blood
cultures and their antibiotic susceptibility rates.
Material and Methods: In our study, susceptibilities to
various antibiotics of 134 Acinetobacter baumannii, 77
Pseudomonas aeruginosa, 9 Stenotrophomonas maltophilia
and 2 Burkholderia cepacia strains, which were isolated
from blood cultures between January 2010 and December
2016, were retrospectively evaluated. Identification and
antimicrobial susceptibilities of the detected bacteria were
carried out using the VITEK 2 (bioMérieux, France)
automated system. Test results between 2010 and 2015
were evaluated according to the CLSI (Clinical and
Laboratory Standards Institute) criteria. However in 2016,
they were evaluated according to EUCAST (European
Committee on Antimicrobial Susceptibility Testing) criteria.
Results: The highest susceptibility rates of A. baumannii strains
isolated were determined for colistin (97%). The highest
susceptibility rates of P. aeruginosa strains were determined for
colistin (97.4%), gentamicin (90.9%) and ceftazidime (88.3%)
Colistin was determined as the most effective antibiotic against
A. baumannii and P. aeruginosa strains.
Conclusion: For these infections with high morbidity and
mortality, similar susceptibility studies should be performed
at certain intervals at every center and the results of blood
cultures should be reported to the clinics rapidly.
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