Browsing by Author "Guducuoglu, H."

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Candida Albicans Outbreak Associated With Total Parenteral Nutrition in the Neonatal Unit
(Elsevier, 2016) Guducuoglu, H.; Gultepe, B.; Otlu, B.; Bektas, A.; Yildirim, O.; Tuncer, O.; Berktas, M.
Background: The most frequently isolated fungi in patients using TPN belongs to the Candida genus. Various infections including venous catheter infections, fungemia, endocarditis and ophthalmitis may be encountered. Objective: Upon growth of Candida in the blood cultures from the pediatric (neonatal) unit of our hospital, a surveillance was performed in this unit and involving the health care workers. Clonal relationships of the isolates were investigated with molecular tests. Methods: Blood samples obtained from the patients in pediatric neonatal unit were studied with automatized blood culture [BacT/Alert (Bio Merioux, France)]. Yeast isolates from environmental surveillance cultures (TPN solutions, hands of healthcare personnel, etagere, etc) and patients were identified as C. albicans with conventional methods and ID 32 C and ATB (TM) Fungus 3 (Biomerieux, France) kits. Clonal similarity was determined by using AP-PCR as initial method and we have also typified all strains by the method of REP-PCR (diversilab system, bioMerieux). Finally; Pulsed Field Gel Electrophoresis (PFGE) was used for confirmation. Results: C. albicans was isolated in blood cultures of seven patients. Similar antifungal susceptibility patterns were observed in all isolates. AP-PCR and REP-PCR showed that the C. albicans isolates grown in the TPN solution and from the patients' blood cultures were clonally same strains. PFGE analysis further confirmed this clonality. Conclusion: According to results of the molecular methods, we thought that a C. albicans outbreak had occurred in the neonatal pediatric unit, due to contamination of TPN solution.
Comparison of Carbapenem Resistance Detected by the Bd Phoenix Automated System in Enterobacteriaceae Isolates With E-Test Method
(Modestum LTD, 2022) Celik, M.; Sunnetcioglu, M.; Guducuoglu, H.; Arslan, Y.; Akyuz, S.; Baran, A.I.
Objective: Automatic identification and antimicrobial susceptibility systems are frequently used to identify clinical isolates in hospitalized patients, but mistakes in these systems can lead to potentially devastating treatment failures for patients. Therefore, the ‘‘Centers for Disease Control and Prevention (CDC)’’ recommends confirming all Carbapenem-resistant and low-susceptibility isolates with a different method. The aim of this study is to compare the Carbapenem susceptibility results of isolates reported as Carbapenem-resistant Enterobacteriaceae according to the BD Phoenix 100 automated system with the E-test method. Materials and Methods: The study included 70 strains of Carbapenem-resistant Enterobacteriaceae members which were isolated and grown from several types of clinical samples in the Medical Microbiology Laboratory. Conventional methods (Gram stain, negative oxidase test) and the BD Phoenix 100 automated system were used to identify the isolates. The susceptibility of all strains to imipenem, ertapenem and meropenem was investigated by E-test method. Automated system results and E-test results were compared. Results: The frequency distribution of all isolated bacterial strains comprised K. pneumoniae in 56 (80%) of the samples included in the study. The automated system test results were correlated with the results of the E-test at a rate of 96.1 % for the imipenem-resistant strains, 84.3% for the meropenem-resistant strains, 84.1% for the ertapenem-resistant strains Conclusions: Automated systems are frequently used in microbiology laboratories to identify isolates. However, automated systems can show a high error rate against some antimicrobials. For this reason, comparing the results of automated system test results with tests such as E-test is very important to prevent both treatment failures and inappropriate antibiotic use that may occur on a patient basis. © 2022 by Author/s and Licensed by Modestum.
Epidemiological Characteristics and Molecular Typing of Salmonella Enterica Serovar Typhi During a Waterborne Outbreak in Eastern Anatolia
(Maney Publishing, 2011) Bayram, Y.; Guducuoglu, H.; Otlu, B.; Aypak, C.; Gursoy, N. C.; Uluc, H.; Berktas, M.
In this study, we aimed to study the molecular and epidemiological characteristics of Salmonella enterica serovar Typhi (S. typhi) outbreak in Eastern Anatolia. Six hundred and thirty-seven patients from the same county with clinical diagnosis of typhoid fever were investigated with conventional methods from stool, urine and blood specimens. Antibiotic susceptibility tests and identifications were performed for positive specimens. Clonal relationships between the isolates were investigated using pulsed field gel electrophoresis (PFGE) method. A questionnaire was completed for the water consumption habits of patients. Of 91 culture positive specimens, 76 were blood, 13 were stool and 2 were urine. The isolates were resistant to ampicillin, ampicillin/sulbactam, chloramphenicol, cefuroxime, amikacin, gentamicin and trimethoprim-sulfamethoxazole. Although there was a single band difference in some isolates, PFGE results indicated that this was an outbreak caused by single strain according to the Tenover criteria. This outbreak thought to be associated with the consumption of tap water contaminated with sewage represents a breakdown of the basic public health and civil engineering infrastructure. Appropriate public health measures should be taken in order to avoid such outbreaks in the future.
Evaluation of Antimicrobial Resistance in Staphylococcus Aureus Isolates by Years
(Hindawi Limited, 2016) Raǧbetli, C.; Parlak, M.; Bayram, Y.; Guducuoglu, H.; Ceylan, N.
Objective. Recently, community and hospital-acquired infections with Staphylococcus aureus have increased and raised antibiotic resistant isolates. In this study, we aimed to evaluate the antibiotic resistance profile of S. aureus isolates over several years in various clinical specimens from our hospital. Materials and Methods. S. aureus strains from 2009 to 2014 were isolated from various clinical samples at Yuzuncu Yil University, Dursun Odabas Medical Center, Microbiology Laboratory, and their antibiotic susceptibility test results were retrospectively investigated. The isolates were identified by conventional methods, and antibiotic susceptibility tests were performed by the Phoenix (Becton Dickinson, USA) automated system method according to Clinical and Laboratory Standards Institute (CLSI) standards. Results. A total of 1,116 S. aureus isolates were produced and methicillin-resistant S. aureus (MRSA) to 21% of all S. aureus isolates between 2009 and 2014. According to the results of susceptibility tests of all isolates of S. aureus, they have been identified as sensitive to vancomycin, daptomycin, linezolid, and levofloxacin. While the resistance rates to nitrofurantoin, quinupristin-dalfopristin, and trimethoprim-sulfamethoxazole were determined as 0.3%, 2.4%, and 6%, respectively, resistance rates to penicillin, erythromycin, rifampicin, gentamicin, and clindamycin were determined as 100%, 18%, 14%, 14%, and 11%, respectively. The highest percentage of methicillin resistance was determined as 30% in 2009, and the resistance was determined to have decreased in subsequent years (20%, 16%, 13%, 19%, and 21%) (p < 0.001). Conclusion. Currently, retrospective evaluations of causes of nosocomial infection should be done periodically. We think that any alteration of resistance over the years has to be identified, and all centers must determine their own resistance profiles, in order to guide empirical therapies. Reducing the rate of antibiotic resistance will contribute to reducing the cost of treatment. © 2016 Cennet Raǧbetli et al.
Leucocyte-Depleted Blood Cardioplegia
(Sage Publications Ltd, 2007) Ozkara, C.; Guler, N.; Kutay, V.; Guducuoglu, H.; Kitmaz, A.; Ozcan, S.
The effect of the depletion of leucocytes from cardioplegic and initial myocardial reperfusion blood on the inflammatory response and myocardial protection in patients with unstable angina undergoing cardiopulmonary bypass (CPB) was studied. Patients were allocated randomly to a leucocyte-depleted (LD) group or a control group. The LD group received continuous retrograde LD isothermic blood cardioplegia and the control group received isothermic blood cardioplegia. Blood samples were collected at seven time-points before, during and after the procedure. Total leucocyte counts of cardioplegia blood in the LD group were significantly lower than in the control group, but systemic leucocyte and neutrophil counts after CPB did not differ between the groups. The levels of adhesion molecules, cytokines, elastase and malondialdehyde were significantly increased after CPB in both groups and reached peak values 2 - 6 h after surgery; no other significant differences were found. LD cardioplegia and myocardial reperfusion did not attenuate the endothelial and neutrophilmediated components of the CPB-induced inflammatory response, which may lead to myocardial reperfusion injury.
Prevalence of High Risk Human Papillomavirus (Hpv) Infection and Abnormal Cervical Cytology and Knowledge About Hpv Vaccine in Eastern Turkey
(Imr Press, 2017) Sahin, H. G.; Kolusari, A.; Guducuoglu, H.
Purpose of investigation: The aim of the present study was to gather data on the high risk human papillomavirus (HPV) frequency and the distribution of HPV types in Eastern Turkey in relation to cervical cytology and to assess the knowledge about cervical cancer, HPV, and vaccination. Materials and Methods: The study population included 1,000 women aged between 20-65 years who attended the outpatients clinics of Department of Obstetrics and Gynecology of the Medical School of Yuzuncu Yil University Hospital. Results: The overall prevalence of high risk HPV-DNA was 2.8 %. Abnormal cytology was observed in 12.9% of the cases. Abnormal cytology consisted of cervical cancer: 0.1%, LSIL: 1.6%, HSIL: 0.5%, ASC-H: 2.1%, atypical glandular cells: 0.4%, and ASCUS: 8.3 %. Conclusion: The prevalence of HPV was low in Eastern Turkey and the most common HPV types are similar to the literature. However, the prevalence of HPV infection is a growing worldwide and the awwreness of the women in the region is limited.