Browsing by Author "Kahraman Kilbas, Elmas Pinar"

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Investigation of the Synergic Effect of the Colistin/Sulbactam Combination in Carbapenem-Resistant acinetobacter Baumannii Complex Strains With Time-Kill and Checkerboard Methods
(Bilimsel Tip Yayinevi, 2021) Kilbas, Imdat; Hatipoglu, Huseyin; Kilic, Umit; Kahraman Kilbas, Elmas Pinar; Koroglu, Mehmet; Altindis, Mustafa; Tıbbi Hizmetler ve Teknikler Bölümü
Introduction: Infections caused by carbapenem-resistant Acinetobacter strains have become very common in recent years, and the most frequently used medicinal treatment is colistin. Combination treatments should also be applied to prevent development of resistance to colistin. This study examines the in vitro synergic effect of the colistin/sulbactam combination in carbapenem-resistant Acinetobacter strains with the time-kill and checkerboard methods. Materials and Methods: Twenty carbapenem-resistant Acinetobacter baumannii-calcoaceticus complex strains, which were isolated from various clinical samples, were included in this study. Strains were identified with mass spectrometry, and antibiotic sensitivity results were determined with the VITEK 2 (R) system. The in vitro effect and synergic activity of the colistin, sulbactam, and colistin/sulbactam combination on the carbapenem-resistant strains were determined using the time-kill and checkerboard methods. Seventeen strains were examined with the time-kill method, and twenty strains were examined using the checkerboard method. The fractional inhibitory concentration index of strains was calculated for detection of synergic effect. Results: Using the time-kill method applied on the colistin/sulbactam combination showed that the combination had a synergic effect on all 17 strains, while sulbactam alone did not have a bactericidal effect in the studied concentrations. When applying the checkerboard method, it was determined that the colistin/sulbactam combination had a synergic effect on 17 of the strains (85%) and an additive effect on 3 strains (15%), sulbactam had a low effect alone (15%), and colistin was effective on all strains. Conclusion: Study results indicated that the colistin/sulbactam combination had a high level of synergic effect on all studied strains using both methods.
Molecular Characterization of Resistance and Virulence Genes in Enterococcus Faecium Strains Isolated Between 2000-2021; Systematic Review
(Bilimsel Tip Yayinevi, 2022) Kahraman Kilbas, Elmas Pinar; Kilbas, Imdat; Ciftci, Ihsan Hakki; Tıbbi Hizmetler ve Teknikler Bölümü
Introduction: The spread of Vancomycin-Resistant Enterococci (VRE) is a major threat in healthcare institutions, especially for patients in the risk group. The aim of this study is to reveal the antibiotic resistance genes, virulence genes and other accompanying factors detected in vancomycin resistant Enterococcus faecium strains isolated from various clinical specimens in different parts of Turkiye. Material and Methods: For this purpose, a systematic search was carried out using different electronic databases between January 2000 and September 2021. A total of 17 studies were evaluated within the scope of systematic review. Results: The vanA gene was detected the most between the years 2000-2007, and no statistically significant difference was found according to the years. The prevalence of the vanB gene was highest between 2008 and 2013, and no statistical difference was found according to the years (p> 0.05). The vanA gene was mostly detected in Eastern Anatolia, Black Sea, Mediterranean and Aegean, vanB Central Anatolia and Southeastern Anatolia regions. No reports related to the vanC gene were found. Since all strains were E. faecium in our study, it is an expected finding that the vanC gene region was never reported. The esp and hyl gene between 2014-2021. Conclusion: The prevalence of resistance and virulence genes among bacteria is a matter of great concern, limiting treatment options. In particular, effective measures should be taken to prevent healthcare-associated VRE infections, and each institution should report its own resistance data.
Citation - Scopus: 1
Seroprevalence of coxiella Burnetii in Human and Animal Populations in Tiirkiye: Meta-Analysis
(Kafkas Univ, veteriner Fakultesi dergisi, 2023) Kilbas, Imdat; Kahraman Kilbas, Elmas Pinar; Ciftci, Ihsan Hakki; Tıbbi Hizmetler ve Teknikler Bölümü
This study aims to reveal Coxiella burnetii by examining the studies reporting Q fever seroprevalence in humans and animals in the last 25 years in Turkiye. In this study, based on PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses), various databases were searched between January 1997 and October. 2022. A literature review was carried out using data analyses performed using the IBM SPSS Version 25.0 statistical package program and Comprehensive Meta-Analysis (CMA) program. Overall prevalence of C. burnetii in humans was 22.78% (95% CI: 16.43%-29.12%), overall prevalence in animals was 13.49% (95% CI: 10.04-16.93%) was detected. The mean prevalence of C. burnetii in sheep was 19.1%+/- 10.88, 10.46 +/- 6.39% in cattle, 15.21 +/- 10.01% in studies including cattle and sheep together, 11.17 +/- 10.74 in cattle, sheep and goats, and 12.4%+/- 1.15% in sheep and goats. As a result of this study, it was determined that the prevalence of Q fever in humans in Turkiye is high in those dealing with animals, women who had a miscarriage, and infertile individuals. Although it is known that this disease is seen in Turkiye, there are not enough case reports in the literature. Detailed studies on Q fever in humans and animals need to be conducted. Further studies are needed to evaluate Q fever risk factors and prevalence data together within the scope of One Health approach.
Twenty-Year Course of Antifungal Resistance in Candida Albicans in Türkiye: A Systematic Review and Meta-Analysis
(MDPI, 2025) Kilbas, Imdat; Kahraman Kilbas, Elmas Pinar; Horhat, Florin George; Ciftci, Ihsan Hakki; Tıbbi Hizmetler ve Teknikler Bölümü
This study aimed to systematically evaluate the resistance rates of Candida albicans to various antifungals based on studies conducted in Turkiye and published between 2005 and 2025 and to analyze the factors contributing to resistance. A systematic literature search was conducted using various keywords in electronic databases (PubMed, Embase, Web of Science, EBSCO, Scopus, Turk Medline and Google Scholar). A total of 42 studies were included in the meta-analysis according to the determined criteria. The quality of the studies was assessed using the Joanna Briggs Institute checklist, and the analyses were performed using appropriate statistical software. The highest resistance rates for fluconazole, itraconazole, and voriconazole were observed in the Aegean and Marmara regions. In the analyses performed with the random-effects model, heterogeneity was found to be high for itraconazole, fluconazole, posaconazole, voriconazole, and caspofungin, and the strongest explanatory variable of this heterogeneity was the geographical region variable. In our study, we determined that antifungal resistance in C. albicans strains in Turkiye is generally low; however, an increasing trend has been observed over the years, especially in amphotericin B resistance. Although the low resistance rates to major antifungal agents such as fluconazole, voriconazole and echinocandins are promising, regional differences and methodological heterogeneity necessitate the development of treatment strategies based on local data.
Citation - WoS: 1
Update on the First Year of Covid-19
(Galenos Publ House, 2021) Kahraman Kilbas, Elmas Pinar; AltindIS, Mustafa; Yilancioglu, Kaan; TekIn, Ishak Ozel; Buran, Duran; Ozkan, Secil; Ilhan, Mustafa Necmi; Tıbbi Hizmetler ve Teknikler Bölümü
The current outbreak of the Coronavirus, severe acute respiratory syndrome Coronavirus-2, which originated in the Wuhan province of the People's Republic of China became a pandemic. Although the clinical findings of the infection vary in adults, the most common symptoms are fever, dry cough, and shortness of breath. The diagnosis of the Coronavirus disease-2019 (COVID-19) is made by clinical symptoms, laboratory tests, and radiological methods. Many drugs such as antivirals, antibiotics, and corticosteroids are used in the treatment of COVID-19. For the successful control of the pandemic, prevention strategies are the key. There is strong consensus that, in addition to wearing masks, hand hygiene, and social distancing, an effective COVID-19 vaccine is probably the most effective approach to sustainably control the pandemic. In this article, current information about the pathogenesis, epidemiology, risk groups, diagnosis, treatment, prevention strategies, and vaccination of the disease in the first year of the COVID-19 pandemic are discussed.