Investigation of in-vitro susceptibility of multidrug-resistant Acinetobacter baumannii strains isolated from clinical specimens to tigecycline
Yükleniyor...
Dosyalar
Tarih
2013
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Assoc Basic Medical Sci Federation Bosnia & Herzegovina Sarajevo
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
The management of infections due to A. baumannii is difficult because of rapidly developing resistance, however, tigecycline, a glycylcyline antimicrobial, is in use for several years. In the present study, it was aimed to determine the susceptibility rates of A. baumannii to tigecycline. A total of 90 A. baumanni isolates were tested using three methods such as disk diffusion, broth microdilution, and E-test. The MIC50 and MIC90 values and the MIC range were found as 2 mu g/ml, 4 mu g/ml, and 0.1-8 mu g/ml by microdilution; and 2 mu g/ml, 6 mu g/ml, and 0.1-12 mu g/ml by E-test, respectively. There were a few major errors as well as the minor rates were all high as between 35.7%-46.7%. The accuracy rates between the methods were low as 53.3% (48/90) between disk diffusion and E-test, 51.1% (46/90) between disk diffusion and microdilution, and 60.0% (54/90) between E-test and microdilution. In the ROC curve analysis, an inhibition zone diameter of susceptibility breakpoint of 21.5 mm had sensitivity between 68.8%-88.9%; specificity between 81.9%-87.9%; and accuracy between 80.0%-83.33%. An analysis based on EUCAST's non-species breakpoints, the MIC tests showed higher accuracy with a rate of 96.7%, however, performance of disk diffusion got worse as lower than 25%. In conclusion, we showed that the reliability of the methods even did not remain as high as the past. Our study presented that none of three methods revealed reliable results in determination of susceptibility of A. baumanni to tigecycline, so the clinical response should be followed up carefully in such cases. (C) 2013 Association of Basic Medical Sciences of FB&H. All rights reserved
Açıklama
Anahtar Kelimeler
Tigecycline, Acinetobacter, Microdilution, Disk Diffusion, E-test
Kaynak
Bosnian Journal Of Basic Medical Sciences
WoS Q Değeri
Q4
Scopus Q Değeri
Q2
Cilt
13
Sayı
4
