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Rasih Felek

BACKGROUND Diagnosis of invasive aspergillosis (IA) in patients with hematologic malignancies and under the risk of IA may be uncertain or may delay because of nonspecific clinical presentation of the patients and difficult application... more
BACKGROUND Diagnosis of invasive aspergillosis (IA) in patients with hematologic malignancies and under the risk of IA may be uncertain or may delay because of nonspecific clinical presentation of the patients and difficult application techniques of conventional methods. Early diagnosis can provide initial antifungal therapy and prevent high mortality. In this study, we investigated the performance of an Aspergillus lateral-flow device (LFD) test (OLM Diagnostics, Newcastle upon Tyne, United Kingdom) for the diagnosis of IA in pediatric febrile neutropenic patients with hematologic malignancies. METHODS Three hundred and fourty seven serum samples of 26 febrile neutropenic episodes of 21 patients at risk for IA were tested. The sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), and accuracy of the Aspergillus LFD test at episode level and at serum level were calculated. RESULTS According to the reference diagnostic criteria of IA, one proven and 13 probable IA episodes were defined. Twelve episodes (46.1%) did not meet the criteria for IA. The sensitivity, specificity, PPV, NPV, accuracy of the Aspergillus LFD test at episode level and at serum level were 14.3%, 100%, 100%, 50%, 53.8% and 12.1%, 100%, 100%, 50.8%, 53.9%, respectively. CONCLUSIONS Aspergillus LFD test is an easy-to-use assay with short hands-on time; however, further study of the clinical utility in children and especially in serum samples are needed. It is a highly specific test for IA on bronchoalveolar lavage (BAL) samples but is not useful as a screening test for serum samples unless combined with galactomannan (GM) antigen test because of its potentially suboptimal sensitivity.
Objective: The purpose of this study was to investigate the clinical effects of erbium, chromium: yttrium, scandium, gallium, garnet (Er, Cr: YSGG) laser treatment as a complementary to scaling and root planning (SRP) during the treatment... more
Objective: The purpose of this study was to investigate the clinical effects of erbium, chromium: yttrium, scandium, gallium, garnet (Er, Cr: YSGG) laser treatment as a complementary to scaling and root planning (SRP) during the treatment of chronic periodontitis and gingival crevicular fluid (GCF) interleukin-1 beta (IL-1β), interleukin-6 (IL-6), and interleukin-35 (IL-35) levels. Materials and Methods: Forty patients with chronic periodontitis were divided into two equal groups at random to receive SRP alone and SRP followed by Er, Cr: YSGG laser treatment, which are control and test groups, respectively. Clinical attachment level (CAL), probing depth (PD), bleeding on probing (BOP), gingival index (GI), and plaque index (PI) were measured for all patients in both groups at baseline and again at the end of the 1st, 3rd, and 6th months following the treatment. Levels of GCF IL-1β, IL-6, and IL-35 were analyzed by enzyme-linked immunosorbent assay. Results: After periodontal treatme...
BACKGROUND AND STUDY AIM We evaluated exocrine pancreas functions using a noninvasive indicator in a case-control study conducted on children and adolescents diagnosed with type 1 diabetes mellitus. PATIENTS AND METHODS Sixty-seven... more
BACKGROUND AND STUDY AIM We evaluated exocrine pancreas functions using a noninvasive indicator in a case-control study conducted on children and adolescents diagnosed with type 1 diabetes mellitus. PATIENTS AND METHODS Sixty-seven patients who participated in a summer camp were enrolled in this study. Nineteen healthy children in the same age group were assigned to the control group. Fecal pancreatic elastase was assayed using the enzyme-linked immunosorbent assay technique. Values higher than 200 µg/g were considered an indication of sufficient exocrine pancreatic functioning, values between 100 µg/g and 200 µg/g were considered mild exocrine pancreatic insufficiency, and values below 100 µg/g were considered severe exocrine pancreatic insufficiency. RESULTS The mean concentration of fecal elastase was 158.38 ± 59.67 µg/g. The patients were assigned to three groups according to these values. Thirteen patients (22%) had sufficient fecal elastase levels, whereas 36 patients (62%) had mildly insufficient levels, and nine patients (16%) had severely insufficient fecal elastase concentrations. The levels of fecal elastase, amylase, lipase, and zinc were significantly different between the patients and controls (p < 0.001). Only the duration of diabetes was significantly different between patients with different severities of exocrine pancreatic insufficiency (p = 0.037). Additionally, the group with severe pancreatic insufficiency had more frequent hypoglycemic attacks. CONCLUSION Exocrine pancreatic insufficiency may develop in children with diabetes, and hypoglycemia attacks are observed more frequently depending on the severity of pancreatic insufficiency.
Samples of vegetable and fruit were taken from the kitchens of tourism accommodation facilities and microbiological analyses were made. The samples were analysed after being disinfected with 100 ppm chlorine for 2-10 minutes and with 2... more
Samples of vegetable and fruit were taken from the kitchens of tourism accommodation facilities and microbiological analyses were made. The samples were analysed after being disinfected with 100 ppm chlorine for 2-10 minutes and with 2 ppm ozone for 2-10 minutes. In the examined vegetables and fruit samples, Escherichia coli, E. coli O157, Salmonella spp., Listeria monocytogenes were examined in terms of microorganisms. Before disinfection, E. coli was detected in all 30 samples: E. coli O157 in 8 samples, Salmonella spp. in 4 samples, and L. monocytogenes in 3 samples. As a result of disinfection applications with 100 ppm chlorine for 2 minutes, E. coli decreased by more than 45%. Salmonella spp. was detected in 1 sample and E. coli O157 was detected in 2 samples. After disinfection applications with 2 ppm ozone for 2 minutes, E. coli decreased by more than 60%. A decrease of more than 70% was observed in E. coli. after disinfection applications with 100 ppm chlorine for 5 minutes....
Background In this study, the prevalence and distribution of dental caries and oral hygiene conditions in a group of patients with β-TM are evaluated and the results compared to age-and gender-matched healthy patients. In addition, oral... more
Background In this study, the prevalence and distribution of dental caries and oral hygiene conditions in a group of patients with β-TM are evaluated and the results compared to age-and gender-matched healthy patients. In addition, oral candida colonization and the density of Streptococcus mutans (S.mutans) and Lactobacilli in the total saliva are assessed. Material and Methods This study involved 59 β-TM patients between 6-16 years old (mean:11.59±3.22), who applied to the Department of Pedodontics, Faculty of Dentistry, Akdeniz University, with ongoing follow-up, treatment and regular blood transfusions. All enrolled patients were diagnosed with β-TM by the Department of Pediatric Hematology and Oncology, Faculty of Medicine, Akdeniz University. As a control group, age-and gender-matched healthy 50 patients were included to the study. Results Plaque (p=0.001), DMFT (p=0.009) and DMFS (p=0.039) indices were significantly higher in the β-TM patients, whereas, the oral hygiene status...
Abstract. In this study we investigated the long term results of intraperitoneal immunoglobulin (Ig) treatment in continuous ambulatory peritoneal dialyses (CAPD) patients with refractory or relapsing peritonitis. Sixteen CAPD patients (4... more
Abstract. In this study we investigated the long term results of intraperitoneal immunoglobulin (Ig) treatment in continuous ambulatory peritoneal dialyses (CAPD) patients with refractory or relapsing peritonitis. Sixteen CAPD patients (4 female, 12 male) with a mean age of 53 ± ...