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Öğe The comparison of adefovir dipivoxil or combination with lamivudine in patients with lamivudine resistant chronic hepatitis B(Elsevier Science Bv, 2015) Ayaz, Celal; Celen, M. Kemal; Geyik, M. Faruk; Bayan, Kadim; Dal, Tuba; Altindis, Mustafa[Abstract Not Available]Öğe A Multicenter Evaluation of Blood Culture Practices, Contamination Rates, and the Distribution of Causative Bacteria(Briefland, 2016) Altindis, Mustafa; Koroglu, Mehmet; Demiray, Tayfur; Dal, Tuba; Ozdemir, Mehmet; Sengil, Ahmet Zeki; Atasoy, Ali RizaBackground: The prognostic value of blood culture testing in the diagnosis of bacteremia is limited by contamination. Objectives: In this multicenter study, the aim was to evaluate the contamination rates of blood cultures as well as the parameters that affect the culture results. Materials and Methods: Sample collection practices and culture data obtained from 16 university/research hospitals were retrospectively evaluated. A total of 214,340 blood samples from 43,254 patients admitted to the centers in 2013 were included in this study. The blood culture results were evaluated based on the three phases of laboratory testing: the pre-analytic, the analytic, and the post-analytic phase. Results: Blood samples were obtained from the patients through either the peripheral venous route (64%) or an intravascular catheter (36%). Povidone-iodine (60%) or alcohol (40%) was applied to disinfect the skin. Of the 16 centers, 62.5% have no dedicated phlebotomy team, 68.7% employed a blood culture system, 86.7% conducted additional studies with pediatric bottles, and 43.7% with anaerobic bottles. One center maintained a blood culture quality control study. The average growth rate in the bottles of blood cultures during the defined period (1259 -26,400/year) was 32.3%. Of the growing microorganisms, 67% were causative agents, while 33% were contaminants. The contamination rates of the centers ranged from 1% to 17%. The average growth time for the causative bacteria was 21.4 hours, while it was 36.3 hours for the contaminant bacteria. The most commonly isolated pathogens were Escherichia coli (22.45%) and coagulase-negative staphylococci (CoNS) (20.11%). Further, the most frequently identified contaminant bacteria were CoNS (44.04%). Conclusions: The high contamination rates were remarkable in this study. We suggest that the hospitals' staff should be better trained in blood sample collection and processing. Sterile glove usage, alcohol usage for disinfection, the presence of a phlebotomy team, and quality control studies may all contribute to decreasing the contamination rates. Health policy makers should therefore provide the necessary financial support to obtain the required materials and equipment.Öğe Seroprevalence and genotyping of hepatitis B, hepatitis C and HIV among healthy population and Turkish soldiers in Northern Cyprus(Baishideng Publishing Group Inc, 2006) Altindis, Mustafa; Yilmaz, Sebahattin; Dikengil, Tansel; Acemoglu, Hamit; Hosoglu, SalihAIM: To compare the prevalence of hepatitis viral markers among soldiers from Turkey, blood donors from Northern Cyprus, and soldiers from Northern Cyprus. METHODS: Hepatitis B surface antigen (HBsAg), anti-HCV and anti-human immunodeficiency virus (HIV) seroprevalence, HBV DNA, HCV RNA and HCV genotyping among soldiers from Turkey (group I), civil blood donors from Northern Cyprus (group R), and soldier candidates from Northern Cyprus (group M) were studied and compared to one another. In total, 17545 cases (13546 males and 3999 females with a mean age of 34.5 +/- 10.3 year, group I = 11234, group II = 5057, and group III = 1254) were included into the study. RESULTS: Among all cases, HBsAg positivity rates were 2.46%, anti-HCV was 0.46% and anti-HIV was 0.00%. HBV DNA was 2.25%, HCV RNA was 0.33% in all groups. Hl3sAg positivity rates were 2.16% in group I, 3.00% in group II and 2.71% in group M. There was a significant difference between group I and group II (chi(2) = 6.11, P = 0.047 < 0.05). Anti-HCV positivity rates were 0.45% in group I, 0.45% in group II, and 0.56% in group M. Genotypes of HCV were 1b and 1a in group I, 1b, la and 2 in group II, and 1b, 1a in group III. HBsAg carrier rates were 2.20% in females and 2.53% in males. Anti-HCV prevalence was 0.38% in females and 0.48% in males. Hl3sAg positivity rates were 2.53% in individuals younger than 50, and 1.47% in older than 50. There was a significant difference between the two groups (chi(2) = 23.48, P = 0.001). CONCLUSION: Prevalences of Hl3sAg, HCV and HIV infections in Northern Cyprus population are similar to those of Turkey. (C) 2006 The WJG Press. All rights reserved.Öğe Six-year distribution pattern of hepatitis C virus in Turkey: a multicentre study(Taylor & Francis Ltd, 2016) Altindis, Mustafa; Dal, Tuba; Akyar, Isin; Karatuna, Onur; Gokahmetoglu, Selma; Ulger, Seda Tezcan; Kulah, CananHepatitis C infection is a public health problem. The aim of this retrospective study was to determine the distribution of hepatitis C virus (HCV) genotypes in seven regions of Turkey, by evaluating 7002 patients with chronic HCV in a six-year period. During the 2009-2014 period, serum/plasma samples from 7002 new consecutive HCV RNA positive patients were collected. The female patients were 3867 (55.2%). The genotype distribution of HCV patiens was evaluated by ages and years. Statistical analysis was performed by using the Mann-Whitney test and the chi(2) analysis. During the six-year period, genotype 1b was the most common genotype (67.7%) followed by untypeable genotype 1 (7.7%), genotype 4 (7.3%) and genotype 3 (6.7%). In 2014, genotype 3 was the second most common one (11.3%) and genotype 4 was the third most common one (9.8%). In the group with <25 years old patients, genotype 1b was most common (78.48%, 62/79) between the years of 2009 and 2011, whereas genotype 3 (34.8%, 86/247), between the years of 2012 and 2014. Genotype 1b was the most common in the groups between 26 and 35 years, 36 and 45 years, 46 and 55 years, 56 and 65 years. The rate of genotype 3 was increased from 4.78% to 10.06% and the rate of genotype 4 was increased from 1.3% to 3.84%, from 2009-2011 to 2012-2014. In recent years, genotypes 3 and 4 have gained importance. New therapeutic strategies and survey studies may be required for the modified HCV genotype pattern.Öğe Two years therapy of chronic hepatitis delta with pegylated interferon-alpha-2a(Elsevier Science Bv, 2015) Celen, M. Kemal; Ayaz, Celal; Bayan, Kadim; Dal, Tuba; Altindis, Mustafa; Altindis, Mustafa[Abstract Not Available]
