Abdurrahman Gülmez

Dr. Abdurrahman Gülmez

orcid

Research Focus & Metrics

Academic Career Length

7Years (2020-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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16 July 2021 in Mikrobiyoloji Bulteni
Verified
Journal Article
Closed access
SKSelda Kömeç
Selda Kömeç
NKNilgün Karabıçak
Nilgün Karabıçak
ACAyşe Nur Ceylan
Ayşe Nur Ceylan
AGAbdurrahman Gülmez
Abdurrahman Gülmez
OOOnur Ozalp
Onur Ozalp
Candida auris is a fungal pathogen that was first identified in 2009. Since its definition, it has spread globally and has caused life-threatening nosocomial infections. Increases in the number of immunocompromised individuals, empirical use of broad-spectrum antimicrobials and widespread use of catheterizations are the predisposing factors in the development of infection. There are problems for the identification of C.auris with the routine methods. In this case report, infections with C.auris, isolated for the first time from three patients in our hospital's intensive care units (ICU) between November 2020-January 2021, were presented. The first case was a 46-year-old male patient with laryngeal carcinoma who developed cardiopulmonary arrest during anesthesia induction in the tumor operation, and was followed up in the ICU. C.auris growth was detected in the blood and intravenous (IV) catheter tip cultures on the 66th day of admittance. Cure achieved on the 24th day under caspofungin treatment as no growth was determined. Second case was a 71-year-old female patient admitted to the emergency department with shortness of breath and general condition disorder that developed after COVID-19 infection and hospitalized in ICU with the diagnosis of pneumonia and acute renal failure. In the 16th day of admittance C.auris growth was detected in blood and from catheter tip cultures and the patient died in the 18th day. The third case was a 49-year-old male patient, followed up in ICU with the diagnosis of subarachnoid hemorrhage after he admitted to the emergency department with confusion. In the 35th day of admittance, 100000 CFU/ mL C auris growth was detected in urine culture. The patient was accepted as asymptomatic fungiuria and followed up in the ICU. It was determined that the three patients were intubated, had urinary and femoral venous catheters and were being followed under wide spectrum antibiotherapy when the growth of C.auris was detected. Isolates identified as C.auris by MALDI-TOF Microflex LT/SH Smart MS in the Medical Microbiology Laboratory were then confirmed by conventional methods and DNA sequencing in the National Mycology Reference Laboratory. Antifungal susceptibility tests were performed by broth microdilution method. Fluconazole MIC values were >256 mg/ml for all cases. Long-term survival in hospital environments, colonization on skin, resistance to disinfectants of C.auris, facilitate the spread of the fungi and resistance to antifungals lead to treatment failures. In this case report, it was aimed to draw attention to the infections with C.auris, its diagnosis and risk factors.

1 June 2020 in Turkish Journal of Parasitology
Verified
Journal Article
Closed access
CGCeren Ergüden Gürbüz
Ceren Ergüden Gürbüz
AGAbdurrahman Gülmez
Abdurrahman Gülmez
SÖSoykan Özkoç
Soykan Özkoç
TITonay İnCeboz
Tonay İnCeboz
ÖMÖzlem Miman
Özlem Miman
SDSongül Bayram Delibaş
Songül Bayram Delibaş
Intestinal parasitic diseases are important public health problems in our country as well as in the world. In this study, intestinal parasites were investigated in patients admitted to Dokuz Eylül University Hospital (DEUH) with various gastrointestinal system complaints. Patients (n=18460) who were referred to the DEUH Central Parasitology Laboratory between January 2011 and December 2018, were included in the study. Fecal samples were examined with Nativ-lugol method and then formol ethyl-acetate precipitation method was applied. Trichrome and kinyoun acid-fast stainings were performed on the necessary samples. Demographic data of the patients were obtained from the hospital's and laboratory's information operating system. One or more parasites were detected in 6% (1128) of 18460 patients examined. The mean age of the patients with parasites was 39.7 (±23.1) years, of which 53.3% were male and 47.6% were female. The distribution of parasites detected were as follows; 4.8% (879) Blastocystis hominis, 0.7% (135) amoebas other than Entamoeba histolytica/dispar, 0.4% (70) Giardia intestinalis, 0.3% (49) Enterebius vermicularis, 0.1% (21) Entamoeba histolytica/dispar, and 0.01% (10) other rare parasites. Our study shows that intestinal parasitic infections are still an important public health problem in our region and that there is a decrease in their incidence.

24 February 2025 in Pathogens
Verified
Journal Article
Open access
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ACAyşe Nur Ceylan
Ayşe Nur Ceylan
SKSelda Kömeç
Selda Kömeç
KŞKamuran şanlı
Kamuran şanlı
BÖBeyza Öncel
Beyza Öncel
MDMehmet Akif Akif Durmuş
Mehmet Akif Akif Durmuş
AGAbdurrahman Gülmez
Abdurrahman Gülmez
Background/Objectives: Carbapenem-resistant Klebsiella pneumoniae (CRKP) infections present a significant clinical challenge due to limited therapeutic options and high transmission potential. This study aimed to identify the resistance genes associated with carbapenemase production in CRKP isolates and evaluate the in vitro activity of ceftazidime/avibactam (CZA) and meropenem/vaborbactam (MEV), among other β-lactam/β-lactamase inhibitor combinations. Methods: Between October 2021 and June 2022, a total of 504 CRKP isolates were grown from patient samples in intensive care units. When duplicate patient samples were removed, the remaining 89 isolates were included in the study. Bacterial identification and antimicrobial susceptibility testing were per-formed using MALDI-TOF, Phoenix M50, and disk diffusion methods, following EUCAST guidelines. PCR analyses identified carbapenemase genes such as OXA-48, NDM, and KPC. Results: The most prevalent carbapenemase gene was OXA-48 (79.8%), followed by NDM (21.4%) and KPC (17.9%). The susceptibility rate to CZA was 82.0%, significantly higher than MEV (10.1%). All isolates were resistant to piperacillin/tazobactam and ceftolozane/tazobactam. Among MEV-resistant isolates, most carried the OXA-48 gene, while NDM was common in CZA-resistant isolates. Conclusions: CZA demonstrates high efficacy against OXA-48-producing CRKP, making it a viable treatment option in settings where OXA-48 predominates. The limited activity of MEV in this study underscores the need for molecular surveillance of resistance mechanisms to guide empirical therapy.

22 April 2023 in Journal of Hospital Infection
Verified
Journal Article
Closed access
AGAbdurrahman Gülmez
Abdurrahman Gülmez
ACA.N. Ceylan
A.N. Ceylan
OÖO. Özalp
O. Özalp

6 August 2024 in Immunologic Research
Verified
Journal Article
Closed access
PDF file
MDMehmet Akif Akif Durmuş
Mehmet Akif Akif Durmuş
SKSelda Kömeç
Selda Kömeç
AGAbdurrahman Gülmez
Abdurrahman Gülmez

13 June 2022 in Infectious Diseases and Clinical Microbiology
Verified
Journal Article
Open access
AGAbdurrahman Gülmez
Abdurrahman Gülmez
AEAhmet Emecen
Ahmet Emecen
MEMestan Emek
Mestan Emek
BUBelgin Unal
Belgin Unal
KEKoray Ergunay
Koray Ergunay
OOOzgen Alpay Ozbek
Ozgen Alpay Ozbek
West Nile Virus (WNV) is an enveloped RNA virus with icosahedral symmetry and with a size of 45-50 nm belonging to the family Flaviviridae, genus Flavivirus (1). The virus, which was first isolated from a woman living in the West Nile region of Uganda in 1937, was noted with consecutive outbreaks in North Africa (...)