Multidrug-Resistant Strains of Acinetobacter baumannii from Intensive Care Unit Patients Show Genetic Diversity and Distribution of Genes Associated with Aminoglycoside Resistance
- سال انتشار: 1401
- محل انتشار: مجله علمی پژوهشی دانشگاه علوم پزشکی زنجان، دوره: 30، شماره: 143
- کد COI اختصاصی: JR_ZUMS-30-143_010
- زبان مقاله: انگلیسی
- تعداد مشاهده: 226
نویسندگان
Dept. of Microbiology, Zanjan Branch, Islamic Azad University, Zanjan, Iran
Dept. of Microbiology, School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran
Dept. of Microbiology, School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran
Dept. of Microbiology, Zanjan Branch, Islamic Azad University, Zanjan, Iran
Dept. of Microbiology, Zanjan Branch, Islamic Azad University, Zanjan, Iran
چکیده
Background and Objective: As a significant cause of nosocomial infections, Acinetobacter baumannii has been linked to opportunistic infections. The assessment of clonal relatedness of A. baumannii isolates using typing methods like ERIC-PCR is beneficial for controlling conditions due to these resistant isolates. This research aims to study Acinetobacter baumannii resistant isolates to multidrug using typing methods like ERIC-PCR in clinics of Zanjan city. Materials and Methods: In all, one hundred immunocompromised patients in ICU were included in the study and isolates of A. baumannii were extracted from their samples, and molecular typing using ERIC-PCR was performed on patients who were positive for aminoglycoside resistance-related genes (aph(۲'')-Id, ant(۴'')-Ia, ant(۳'')-I, aac(۶'')-Ib, aac(۳)-I, aph(۳'')-I, aph(۲'')-Ib and aph (۲'')-Ic). ۶۷% of isolates had gentamicin resistance, and ۶۳% had tobramycin resistance. Results: The isolates tested positive for multidrug resistance (MDR) were all labeled as MDR strains. Furthermore, all antibiotics tested were ineffective against ۳۲% of the isolates, while ۹۱% could be deemed extensively drug-resistant (XDR). The aminoglycoside resistance gene aac(۶′)-Ib accounted for ۷۹% of the cases, followed by ant(۳'')-I and aph(۲'')-Id (۴۷%). Sixty-four percent of the isolates carried three or more aminoglycoside resistance genes simultaneously. A total of six types and ۲۰ subtypes of patterns were obtained from ERIC-PCR. Conclusion: In this study, aminoglycoside-resistant A. baumannii was found in a high percentage of ICU patients, mainly with the enzyme-modified aminoglycosides like aac(۶′)-Ib, aph(۲'')-Id and ant(۳'')-I. ERIC-PCR has also shown an increased level of diversity in A. baumannii isolates. Therefore, genetic diversity or clonal relatedness of A. baumannii isolates in clinical settings can be assessed using ERIC-PCR.کلیدواژه ها
Acinetobacter baumannii, Molecular typing, Antibiotic resistance, ERIC PCRاطلاعات بیشتر در مورد COI
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