Publications by authors named "Heper Y"

Background: Stenotrophomonas maltophilia is a gram-negative bacterium that can cause hospital infections and outbreaks within hospitals. This study aimed to evaluate an outbreak of Stenotrophomonas maltophilia, caused by ready-to-use commercial syringes containing liquid lithium and heparin for arterial blood gas collection in a university hospital.

Methods: Upon detecting an increase in Stenotrophomonas maltophilia growth in blood cultures between 15.

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Our study aimed to detect carbapenem-resistant (CRKP) and/or carbapenem-resistant in perianal swab samples, exploring their link to bloodstream infections (BSIs) in a tertiary-care university hospital. CRKP-related BSIs ranged from 3.7% to 9.

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Article Synopsis
  • The study examined the impact of the COVID-19 pandemic on healthcare-associated infections (HAIs), antibiotic resistance, and consumption rates in ICU patients at a university hospital, comparing data from before and during the pandemic (2018-2021).
  • Results indicated a higher incidence of bloodstream infections in COVID-19 ICUs during the pandemic, with significant increases in related infection rates compared to pre-pandemic times and other non-COVID ICUs.
  • Antibiotic usage patterns also shifted, with notable differences in infection rates and antibiotic resistance, particularly regarding extended-spectrum beta-lactamase (ESBL) positivity rates, which were higher in the COVID-19 ICU.
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Background: Blood components should be gamma-irradiated (γ-IR) in order to prevent transfusion-associated graft-versus-host disease. The aim of this study is to determine the effect of γ-IR and storage time on the exosomes released from apheresis platelet concentrates (aPC) and to investigate their impact on the maximum platelet aggregation (MPA) and hemostasis.

Materials And Methods: Eight units of aPC were included in this study.

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Background: The potential role of interleukin-6 (IL-6) in coronavirus disease 2019 (COVID-19) pneumonia provides the rationale for investigating IL-6 signaling inhibitors.

Objectives: To evaluate and report treatment responses to tocilizumab (TCZ) in COVID-19 patients and compare mortality outcomes with those of standard care.

Material And Methods: Patients hospitalized with a severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection, diagnosed with reverse transcription polymerase chain reaction (RT-PCR) between March 2020 and April 2021, were enrolled in this single-center retrospective cohort study.

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Introduction: Our knowledge has gaps regarding severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) replication levels and its association to severity of Coronavirus disease 2019 (COVID-19). The aim of this study was to investigate the association of SARS-CoV-2 viral load with disease severity and serum biomarkers in COVID-19 patients.

Methodology: Viral load was determined via cycle threshold (Ct) values of SARS-CoV-2 real-time reverse transcriptase-polymerase chain reaction (RT-PCR) in 214 adult patients.

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Introduction: Determining prognostic factors in patients with coronavirus disease (COVID-19) can have great impact on treatment planning and follow-up strategies. Herein, we aimed to evaluate prognostic factors and clinical scores for confirmed COVID-19 patients in a tertiary-care hospital in the Bursa region of Turkey.

Methodology: Patients who had been diagnosed with COVID-19 microbiologically and/or radiologically between March and October 2020 in a tertiary-care university hospital were enrolled retrospectively.

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Article Synopsis
  • This study investigated the persistence of SARS-CoV-2-specific antibodies in 43 adults and 34 children about 12 weeks post-COVID-19 symptoms using six different serological assays.
  • The Roche Elecsys total antibody test showed the best sensitivity rates (over 90%) compared to other tests, while five IgG-targeting assays showed similar performance between adults and children.
  • Higher antibody levels were found in males and pneumonia patients, indicating the need for further research on how antibody persistence could impact potential re-infections.
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Introduction (SM) is one of the common gram-negative pathogens that cause nosocomial infections. The aim of the present study is to evaluate the treatment and outcome of SM bacteraemia. Materials and Methods We retrospectively evaluated antimicrobial treatment in adult patients with nosocomial SM bacteraemia, with the 14th and 30th-day mortality as the outcome.

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Objective: The aim of this study was to analyze the temporal trends of HIV epidemiology in Turkey from 2011 to 2016.

Methods: Thirty-four teams from 28 centers at 17 different cities participated in this retrospective study. Participating centers were asked to complete a structured form containing questions about epidemiologic, demographic and clinical characteristics of patients presented with new HIV diagnosis between 2011 and 2016.

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Background: Because of their similar modes of transmission, the simultaneous infection of viral hepatitis and human immunodeficiency virus are increasingly seen as a big problem related to human health.

Aims: To determine the drug mutations in hepatitis B virus and/or hepatitis C virus co-infected human immunodeficiency virus-1 patients in Turkey.

Study Design: Retrospective cross-sectional study.

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Objective: Treponema pallidum and HIV are transmitted frequently through sexual contact, these agents with epidemiological similarities co-infect the same host. The current number of HIV-infected cases in Turkey is increasing. For this reason, we aimed to reveal the characteristics of syphilis in HIV/AIDS cases.

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Phlebotomy causes pain and discomfort to adults. The objective of this study was to investigate the effect of the use of Buzzy on phlebotomy satisfaction and pain relating to the phlebotomy process in healthy adult blood donors voluntarily donating blood. This was a prospective, randomized, controlled experimental study.

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Background: The aim of this study was to investigate the immunological alterations that occur during the storage of erythrocyte suspensions which may lead to transfusion-related immunomodulation following allogeneic blood transfusion.

Materials And Methods: One part of the erythrocyte suspensions obtained from donors was leucoreduced while the other part was not. The leucoreduced (LR) and non-leucoreduced (NL) erythrocyte suspensions were then further divided into three equal amounts which were stored for 0, 21 or 42 days prior to measurements, by enzyme-linked immunosorbent assays, of cytokine levels in their supernatants.

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Introduction: Brucellosis is a public health problem that is prevalent in several developing countries.

Methods: The clinical and laboratory characteristics of 164 cases of brucellosis in Bursa, Turkey, were retrospectively evaluated.

Results: The ages of the 164 patients ranged from 15-85 years.

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Background And Objective: Acinetobacter baumannii and A. baumannii/calcoaceticus complex are commonly encountered pathogens in nosocomial infections. This study aimed to evaluate the treatment and prognostic risk factors in nosocomial pneumonia caused by these microorganisms.

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The aim of this study was to assess the infectious diseases (ID) wards of tertiary hospitals in France and Turkey for technical capacity, infection control, characteristics of patients, infections, infecting organisms, and therapeutic approaches. This cross-sectional study was carried out on a single day on one of the weekdays of June 17-21, 2013. Overall, 36 ID departments from Turkey (n = 21) and France (n = 15) were involved.

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Background: In this study, our aim was to identify the validity of the prophylaxis indications for patients who received tetanus prophylaxis, determine the ratio of high-risk wounds to the number of patients with immunity, and to evaluate the tetanus immunity of specific age groups.

Methods: Patients who applied to the Emergency Department (ED) between September 2009 and May 2010 and who were considered for tetanus prophylaxis by his/her primary care physician were included in the study.

Results: A total of 320 patients were evaluated.

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Background: Because of high morbidity of the brucellosis in humans and the potential use of the microorganism as an agent of biologic warfare, protection of effective vaccines and specific diagnostic reagents become necessary to eradicate brucellosis.

Objective: In this study we aimed to investigate the cytokine responses and changes in peripheral blood lymphocyte subgroups of acute brucellosis patients in response to L7/L12 and glyceraldehyde 3-phosphate dehydrogenase (GAPDH) recombinant proteins derived from Brucella abortus.

Methods: levels of IFN-γ, IL-4 and IL-10 secreted from PBMCs of 25 acute brucellosis patients and 15 healthy controls, stimulated with Phytohemagglutinin (PHA), L7/L12 or GAPDH were measured by ELISA.

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The incidence of nosocomial candidaemia was evaluated in a retrospective study in a Turkish tertiary-care hospital. Over a 12-year period (1996-2007), a total of 743 episodes of candidaemia occurred in 743 patients, accounting for an average incidence of 1.9 episodes/1000 admissions and 2.

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We present a case of multiple intracranial abscesses caused by Cryptococcus neoformans in a patient who presented with no symptoms of immunodeficiency.

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Despite the decrease in transfusion-transmitted hepatitis B virus (HBV), it is still one of the main problems in transfusion medicine. Recent studies have shown that HBV is transmissible to recipients from HBsAg negative donations. This study was aimed to detect anti-HBc, anti-HBs and HBV-DNA positivity in HBsAg negative cases and to determine whether a reconsideration is required for HBV screening policies in blood banking.

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Background: Clostridium difficile (C. difficile) is a well-established cause of nosocomial diarrhea. The aim of our study was to define the incidence of nosocomial diarrhea in our hospital and to determine the role of C.

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We investigated the risk factors for community acquired/onset urinary tract infections due to extended spectrum beta-lactamase (ESBL)-positive Escherichia coli or Klebsiella pneumoniae in 62 patients who were followed-up from August 1, 2003 to September 1, 2006. Sixty patients with community-acquired urinary tract infections caused by ESBL-negative E. coli or K.

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