1,721,166 research outputs found
Supplementary dataset to publication: "Genomic epidemiology of Campylobacter fetus subsp. venerealis from Germany"
No full textSupplementary dataset to publication: "Genomic epidemiology of Campylobacter fetus subsp. venerealis from Germany" by Abdel-Glil Mostafa Y., Hotzel Helmut, Tomaso Herbert, Didelot Xavier, Brandt Christian, Seyboldt Christian, Linde Jörg, Schwarz Stefan, Neubauer Heinrich, El-Adawy Hosny. Genomic epidemiology of Campylobacter fetus subsp. venerealis from Germany. Frontiers in Veterinary Science. volume 9 (https://www.frontiersin.org/articles/10.3389/fvets.2022.1069062
Supplementary dataset to publication: "Genomic epidemiology of Campylobacter fetus subsp. venerealis from Germany"
No full textSupplementary dataset to publication: "Genomic epidemiology of Campylobacter fetus subsp. venerealis from Germany" by Abdel-Glil Mostafa Y., Hotzel Helmut, Tomaso Herbert, Didelot Xavier, Brandt Christian, Seyboldt Christian, Linde Jörg, Schwarz Stefan, Neubauer Heinrich, El-Adawy Hosny. Genomic epidemiology of Campylobacter fetus subsp. venerealis from Germany. Frontiers in Veterinary Science. volume 9 (https://www.frontiersin.org/articles/10.3389/fvets.2022.1069062
Supplementary dataset to publication: "Genomic epidemiology of Campylobacter fetus subsp. venerealis from Germany"
No full textSupplementary dataset to publication: "Genomic epidemiology of Campylobacter fetus subsp. venerealis from Germany" by Abdel-Glil Mostafa Y., Hotzel Helmut, Tomaso Herbert, Didelot Xavier, Brandt Christian, Seyboldt Christian, Linde Jörg, Schwarz Stefan, Neubauer Heinrich, El-Adawy Hosny. Genomic epidemiology of Campylobacter fetus subsp. venerealis from Germany. Frontiers in Veterinary Science. volume 9 (https://www.frontiersin.org/articles/10.3389/fvets.2022.1069062
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Full text link“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
Thermophilic Campylobacter in turkeys in Germany : Epidemiology, genotyping and antimicrobial sensitivity studies
No full textPoultry remains an important vehicle for pathogens, leading to human food borne disease all over the world. Campylobacter infection in commercial broilers and turkeys represents a challenge for all persons involved in poultry food production chain. Studying the colonization and genetic diversity along with the antimicrobial resistance of Campylobacter jejuni in commercial poultry rearing is a matter of concern. The findings of this thesis clearly indicate that age and -possible- sex have an influence on the onset of colonization and prevalence of thermophilic Campylobacter in fattening turkey farms. Drinking water can be considered as primary source for flock infection. Additionally, multiplex PCR used for detection of thermophilic Campylobacter DNA which was directly extracted from faecal and environmental samples was developed and evaluated (Chapter 2).
The assessment of the genetic diversity of a Campylobacter population is critical for the understanding of the epidemiology of this bacterium and consequently this information has to be used to reduce disease burden. Hence, a part of this study was conducted to investigate the dynamic of flock colonization and genetic diversity in Campylobacter isolates using different genotyping tools. The performance of established flaA genotyping, multilocus sequencing typing (MLST) and DNA microarray typing assay based on the ArrayTube™ technology was evaluated using C. jejuni isolates that proved to be genetically stable in their flaA genes. It was shown that different typing methods are useful to determine the genetic heterogeneity of C. jejuni isolated from turkey during the rearing process. The degree of relatedness was varying depending upon the typing method used. DNA microarray technique based on whole genome information had the highest discriminatory power compared to the other molecular typing methods assessed here. The ATTM microarray system is also relatively cheap, when hands-on-time, necessary equipment, and costs of material are considered. This investigation demonstrated changing of C. jejuni in turkeys and the coexistence of different genotypes during turkey rearing for the first time (Chapter 3).
A recent concern is the emergence of antibiotic resistance in C. jejuni isolated from turkeys in particular of those antibiotics used to treat human illness. Monitoring the progress of this resistance becomes a growing public health issue. The third part of this study was conducted to provide information about the resistance of C. jejuni isolated from turkeys by investigating the genes for ciprofloxacin, tetracycline and erythromycin resistance. All isolates were fully susceptible to chloramphenicol and gentamicin. The isolates were highly resistant to sulphonamides, metronidazole, ciprofloxacin, naladixic acid, and tetracycline. The isolates were sensitive to streptomycin, erythromycin, neomycin, and amoxicillin. Multidrug resistance was detected. Replacement of the Thr-86→Ile of the gyrA gene, and a tet(O) gene were the main resistance mechanisms for fluoroquinolones and tetracycline resistance, respectively, while no point mutation in the 23S rRNA gene was found that could be responsible for macrolide resistance. The present study provides sufficient data suggesting that the PCR-RFLP and MAMA-PCR are simple and rapid methods for the detection of ciprofloxacin resistance in C. jejuni. These methods seem to be suitable to serve as possible alternative methods for routine detection of mutations without the need for sequencing. To our knowledge, this is the first study providing sufficient data on the current status of the antimicrobial susceptibility to C. jejuni isolated from turkey farms in different regions in Germany (Chapter 4).
During the trail to isolate Campylobacter from caecal content of female turkey at 16th week of age Two Gram negative, micro-aerophilic, non-motile and non-spore-forming coccoid bacteria were isolated. The biochemical reaction profiles (API 20 E and API 20 NE) typed both strains as Ochrobactrum anthropi. On the basis of 16S rRNA gene and recA gene sequence similarities the strains were identified as Ochrobactrum anthropi and Ochrobactrum pecoris, respectively. Both strains were highly resistant against beta-lactam antibiotics, chloramphenicol and sulphonamides but variable in susceptibility to ciprofloxacin, gentamicin and tetracycline. This is the first time that Ochrobactrum species were isolated from an avian host (Chapter 5)
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe 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
Full text linkWe 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
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