1,720,954 research outputs found
Seroprevalence of hepatitis E virus infection in acute leukemia patients with allogeneic transplantation
Get PDFAim: Hepatitis E Virus (HEV) infection is an emerging threat in allogeneic Hematopoietic Stem Cell Transplant (allo-HSCT) recipients. The aim of this study was to determine the prevalence of HEV infection in patients with acute leukemia before and after the transplantation.Material and Methods: The study was carried out with the serum samples taken before and after the transplantation from patients (n=42) with acute leukemia, who were 4 months to 64 years of age and who had allogenic transplant at Gazi University Hospital. All samples were tested in terms of HEV-specific anti-IgG and IgM positive value by using ELISA kit.Results: While 1 (2.3%) of the samples that were included in the study was positive anti-HEV IgG before transplantation, it was found negative after the transplantation (58th month). Positive anti-HEV IgM was not found before and after the transplantation in the collected samples. The average age of the seronegative group was determined as 30.8 ± 33.1 for male and female, respectively. There was no statistically significant difference in terms of anti-HEV IgM positivity and anti-HEV IgG positivity compared with seronegative cases of seropositive cases.Conclusions: This study was conducted to determine the prevalence of HEV infection in allogeneic stem cell patients. With this study, the incidence and importance of HEV can be determined in these patients before and after transplantation. This study can also create an important epidemiological data for our country
Resistance Patterns of Multi-Drug Gram-Negative Isolates to Carbapenems: An Emerging Problem
No full textObjective: Infections caused by multidrug-resistant (MDR) Gram-negative bacteria and resistance to carbapenems constitute a major public health problem worldwide, due to limited treatment options and high mortality rates. In this study, we aimed to determine the resistance profiles of MDR Gram-negative bacilli isolated from clinical samples to carbapenems. Material and Method: Specimens, from which MDR Gram-negative bacteria were isolated, were cultured onto 5% sheep blood and EMB agar, and VITEK 2 automated system (bio M & eacute;rieux, France) was used for identification and antimicrobial susceptibility testing. Data were analyzed using chi-square and Fisher's exact tests. Results: 1072 MDR bacterial strains were isolated from the specimens of 272 patients, with the majority of transtracheal aspirates (64%) sent predominantly from palliative care (49.8%) and intensive care (42%) units. The leading pathogens were Pseudomonas aeruginosa (42,1%), Acinetobacter baumannii (31,2%), and Klebsiella spp (22,5%). The highest resistance rate among carbapenems was detected to meropenem (91,6%), followed by imipenem (44,3%) and ertapenem (25%). While ertapenem resistance was significantly lower in P. aeruginosa strains (p<0,01), meropenem resistance was significantly higher in A. baumannii strains when compared to other antibiotics. Conclusion: Since Gram-negative MDR bacteria continue to spread rapidly, monitoring resistance profiles through active hospital surveillance is crucial to determine the appropriate treatment. The data obtained in this study once again highlight the importance of resistance to carbapenems and is considered to contribute to epidemiological data.Emerging Sources Citation Inde
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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