224 results on '"Hammerl P"'
Search Results
2. Unveiling the Digital Evolution of Molecular Tumor Boards
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Lutz, Sebastian, D’Angelo, Alicia, Hammerl, Sonja, Schmutz, Maximilian, Claus, Rainer, Fischer, Nina M., Kramer, Frank, and Hammoud, Zaynab
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- 2024
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3. Cerebral oxygenation during immediate fetal-to-neonatal transition and fidgety movements between six to 20 weeks of corrected age: An ancillary study to the COSGOD III trial
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Wolfsberger, Christina Helene, Schwaberger, Bernhard, Urlesberger, Berndt, Scheuchenegger, Anna, Avian, Alexander, Hammerl, Marlene, Kiechl-Kohlendorfer, Ursula, Griesmaier, Elke, and Pichler, Gerhard
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- 2024
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4. Colitis associated with persistent drug-induced immune dysregulation
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Köhler, Johanna, Hammerl, Randolf, Mayer, Daniel M., Fessler, Johannes, and Langner, Cord
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- 2024
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5. TME-analyzer: a new interactive and dynamic image analysis tool that identified immune cell distances as predictors for survival of triple negative breast cancer patients
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Balcioglu, Hayri E., Wijers, Rebecca, Smid, Marcel, Hammerl, Dora, Trapman-Jansen, Anita M., Oostvogels, Astrid, Timmermans, Mieke, Martens, John W. M., and Debets, Reno
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- 2024
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6. Disease trajectories in interstitial lung diseases – data from the EXCITING-ILD registry
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Buschulte, Katharina, Kabitz, Hans-Joachim, Hagmeyer, Lars, Hammerl, Peter, Esselmann, Albert, Wiederhold, Conrad, Skowasch, Dirk, Stolpe, Christoph, Joest, Marcus, Veitshans, Stefan, Höffgen, Marc, Maqhuzu, Phillen, Schwarzkopf, Larissa, Hellmann, Andreas, Pfeifer, Michael, Behr, Jürgen, Karpavicius, Rainer, Günther, Andreas, Polke, Markus, Höger, Philipp, Somogyi, Vivien, Lederer, Christoph, Markart, Philipp, and Kreuter, Michael
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- 2024
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7. Hospitalisation patterns in interstitial lung diseases: data from the EXCITING-ILD registry
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Buschulte, Katharina, Kabitz, Hans-Joachim, Hagmeyer, Lars, Hammerl, Peter, Esselmann, Albert, Wiederhold, Conrad, Skowasch, Dirk, Stolpe, Christoph, Joest, Marcus, Veitshans, Stefan, Höffgen, Marc, Maqhuzu, Phillen, Schwarzkopf, Larissa, Hellmann, Andreas, Pfeifer, Michael, Behr, Jürgen, Karpavicius, Rainer, Günther, Andreas, Polke, Markus, Höger, Philipp, Somogyi, Vivien, Lederer, Christoph, Markart, Philipp, and Kreuter, Michael
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- 2024
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8. TME-analyzer: a new interactive and dynamic image analysis tool that identified immune cell distances as predictors for survival of triple negative breast cancer patients
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Hayri E. Balcioglu, Rebecca Wijers, Marcel Smid, Dora Hammerl, Anita M. Trapman-Jansen, Astrid Oostvogels, Mieke Timmermans, John W. M. Martens, and Reno Debets
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Medical technology ,R855-855.5 ,Medical physics. Medical radiology. Nuclear medicine ,R895-920 - Abstract
Abstract Spatial distribution of intra-tumoral immune cell populations is considered a critical determinant of tumor evolution and response to therapy. The accurate and systemic search for contexture-based predictors would be accelerated by methods that allow interactive visualization and interrogation of tumor micro-environments (TME), independent of image acquisition platforms. To this end, we have developed the TME-Analyzer, a new image analysis tool, which we have benchmarked against 2 software tools regarding densities and networks of immune effector cells using multiplexed immune-fluorescent images of triple negative breast cancer (TNBC). With the TME-Analyzer we have identified a 10-parameter classifier, predominantly featuring cellular distances, that significantly predicted overall survival, and which was validated using multiplexed ion beam time of flight images from an independent cohort. In conclusion, the TME-Analyzer enabled accurate interactive analysis of the spatial immune phenotype from different imaging platforms as well as enhanced utility and aided the discovery of contextual predictors towards the survival of TNBC patients.
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- 2024
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9. Correction to: Colitis associated with persistent drug-induced immune dysregulation
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Köhler, Johanna, Hammerl, Randolf, Mayer, Daniel M., Fessler, Johannes, and Langner, Cord
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- 2024
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10. Cryptosporidium spp. in German wildlife: Detection, regional occurrence and diversity in wild boar, roe, red and fallow deer
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Claudia Jäckel, Iryna Hrushetska, Anne Mayer-Scholl, Jens A. Hammerl, Annette Johne, Carl Gremse, Denny Maaz, Karsten Nöckler, and Martin Heinrich Richter
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Sample preparation ,Nested-PCR ,Prevalence ,Detection ,Game ,Cryptosporidium ,Science (General) ,Q1-390 ,Social sciences (General) ,H1-99 - Abstract
Cryptosporidium is a cause of diarrheal infections responsible for a loss of human and animal welfare worldwide. The impact of the parasite is underestimated and the reported sources of infection are diverse, as it occurs in a wide variety of hosts. Wildlife has been reported as a notifiable source, but few studies are available on its occurrence in European wild boar and cervid species. To determine the occurrence of Cryptosporidium in game in Brandenburg, Germany, a molecular survey was conducted during the 2017 to 2020 hunting seasons. A total of 562 fecal samples from wild boar (Sus scrofa, n = 262), roe deer (Capreolus capreolus, n = 174), red deer (Cervus elaphus, n = 62), fallow deer (Dama, n = 51) and 13 samples of unspecified species were analyzed for both 18S ribosomal RNA (18S rRNA) and Cryptosporidium oocyst wall protein (COWP) gene sequence regions. PCR results showed that 21.2 % of the samples (n = 119/562) were positive for at least one target gene (18S rRNA: n = 114; COWP: n = 14), but differences in Cryptosporidium occurrence were observed within species and hunting seasons, with variations ranging from 1.8 % to 41.7 % (roe deer), respectively. Analysis of Sanger sequences of the 18S rRNA and COWP PCR products indicated that the C. sp. deer genotype was predominant in deer (roe deer: 86.7 %, red deer: 66.7 %, fallow deer: 58.8 %), while C. suis and C. scrofarum were mainly detected in wild boar (88.5 %). The human pathogenic species C. parvum was detected in only 1.2 % (n = 7) of the samples analyzed, but without a clear indication of a specific wild animal host. The highest Cryptosporidium diversity was found in wild boar and roe deer with five and four different species, respectively. Comparison of the 18S rRNA sequences with the designated reference revealed minor variations at several nucleotide positions in some isolates, possibly indicating evolutionary adaptations and the development of new subtypes. In conclusion, wildlife represents a reservoir for a diverse spectrum of Cryptosporidium species and may thus contribute to their environmental spread and the transmission to humans.
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- 2024
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11. Biological and genomic characterization of three psychrophilic Y. enterocolitica phages
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Jens A. Hammerl, Minh Anh Pham, Shirin El-Ahmad, Diana Manta, Claudia Jäckel, and Stefan Hertwig
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Yersinia ,phages ,application ,genome ,temperature ,Microbiology ,QR1-502 - Abstract
Yersinia (Y.) enterocolitica is an important foodborne pathogenic species that is mainly transmitted by the consumption of contaminated meat, particularly pork. To combat the bacteria along the food chain, the application of strictly lytic phages may be a promising tool. As the temperatures in the gut of animals and during food processing can differ significantly, a phage cocktail intended to be used for applications should comprise phages that are active at various temperatures. In this study, we isolated and characterized three phages with a myoviridal morphology (vB_YenM_P8, vB_YenM_P744 and vB_YenM_P778), which lysed the most important Y. enterocolitica serotypes O:3, O:9 and O:5,27 at a low multiplicity of infection (MOI) and at low temperatures down to 6°C. While vB_YenM_P8 is a member of the T4 family, vB_YenM_P744 and vB_YenM_P778 are novel phages that do not show relationship to known phages. The three phages were mixed in a cocktail with the already described phages vB_YenM_P281 and vB_YenP_Rambo. The cocktail revealed a strong lytic activity and lysed a mixture of Y. enterocolitica serotypes at room temperature (RT) within few hours with a reduction of up to 4.8 log10 units. Moreover, at even lower temperatures the mixture was significantly reduced after incubation overnight. The strongest reductions were determined at 6°C (4.0 log10 units) suggesting that the cocktail can lyse the psychrophilic Y. enterocolitica also during food processing. To determine possible phage resistance, 100 colonies that survived the infection by the phages were isolated and analysed regarding their serotype and phage susceptibility. Most isolates belonged to serotype O:9, but all of them were still sensitive to at least one phage of the cocktail.
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- 2024
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12. Disease trajectories in interstitial lung diseases – data from the EXCITING-ILD registry
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Katharina Buschulte, Hans-Joachim Kabitz, Lars Hagmeyer, Peter Hammerl, Albert Esselmann, Conrad Wiederhold, Dirk Skowasch, Christoph Stolpe, Marcus Joest, Stefan Veitshans, Marc Höffgen, Phillen Maqhuzu, Larissa Schwarzkopf, Andreas Hellmann, Michael Pfeifer, Jürgen Behr, Rainer Karpavicius, Andreas Günther, Markus Polke, Philipp Höger, Vivien Somogyi, Christoph Lederer, Philipp Markart, and Michael Kreuter
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ILD ,IPF ,Progression ,Mortality ,Risk factors ,Diseases of the respiratory system ,RC705-779 - Abstract
Abstract Background Interstitial lung diseases (ILD) comprise a heterogeneous group of mainly chronic lung diseases with different disease trajectories. Progression (PF-ILD) occurs in up to 50% of patients and is associated with increased mortality. Methods The EXCITING-ILD (Exploring Clinical and Epidemiological Characteristics of Interstitial Lung Diseases) registry was analysed for disease trajectories in different ILD. The course of disease was classified as significant (absolute forced vital capacity FVC decline > 10%) or moderate progression (FVC decline 5–10%), stable disease (FVC decline or increase
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- 2024
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13. Hospitalisation patterns in interstitial lung diseases: data from the EXCITING-ILD registry
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Katharina Buschulte, Hans-Joachim Kabitz, Lars Hagmeyer, Peter Hammerl, Albert Esselmann, Conrad Wiederhold, Dirk Skowasch, Christoph Stolpe, Marcus Joest, Stefan Veitshans, Marc Höffgen, Phillen Maqhuzu, Larissa Schwarzkopf, Andreas Hellmann, Michael Pfeifer, Jürgen Behr, Rainer Karpavicius, Andreas Günther, Markus Polke, Philipp Höger, Vivien Somogyi, Christoph Lederer, Philipp Markart, and Michael Kreuter
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ILD ,IPF ,Hospitalisation ,Prognosis ,Risk factors ,Diseases of the respiratory system ,RC705-779 - Abstract
Abstract Background Interstitial lung diseases (ILD) comprise a heterogeneous group of mainly chronic lung diseases with more than 200 entities and relevant differences in disease course and prognosis. Little data is available on hospitalisation patterns in ILD. Methods The EXCITING-ILD (Exploring Clinical and Epidemiological Characteristics of Interstitial Lung Diseases) registry was analysed for hospitalisations. Reasons for hospitalisation were classified as all cause, ILD-related and respiratory hospitalisations, and patients were analysed for frequency of hospitalisations, time to first non-elective hospitalisation, mortality and progression-free survival. Additionally, the risk for hospitalisation according to GAP index and ILD subtype was calculated by Cox proportional-hazard models as well as influencing factors on prediction of hospitalisation by logistic regression with forward selection. Results In total, 601 patients were included. 1210 hospitalisations were recorded during the 6 months prior to registry inclusion until the last study visit. 800 (66.1%) were ILD-related, 59.3% of admissions were registered in the first year after inclusion. Mortality was associated with all cause, ILD-related and respiratory-related hospitalisation. Risk factors for hospitalisation were advanced disease (GAP Index stages II and III) and CTD (connective tissue disease)-ILDs. All cause hospitalisations were associated with pulmonary hypertension (OR 2.53, p = 0.005). ILD-related hospitalisations were associated with unclassifiable ILD and concomitant emphysema (OR = 2.133, p = 0.001) as well as with other granulomatous ILDs and a positive smoking status (OR = 3.082, p = 0.005). Conclusion Our results represent a crucial contribution in understanding predisposing factors for hospitalisation in ILD and its major impact on mortality. Further studies to characterize the most vulnerable patient group as well as approaches to prevent hospitalisations are warranted.
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- 2024
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14. Gender-specific distribution of knee morphology according to CPAK and functional phenotype classification: analysis of 8739 osteoarthritic knees prior to total knee arthroplasty using artificial intelligence
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Huber, Stephanie, Mitterer, Jennyfer A., Vallant, Sascha M., Simon, Sebastian, Hanak-Hammerl, Florian, Schwarz, Gilbert M., Klasan, Antonio, and Hofstaetter, Jochen G.
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- 2023
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15. Klebsiella pneumoniae arms itself: poultry food chain drives spread and evolution of mcr-1.26-IncX4 plasmids
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Ulrike Binsker, Claudia Jäckel, Jörg Rau, Maria Borowiak, Carina Salzinger, Isidro García-Meniño, Annemarie Käsbohrer, and Jens André Hammerl
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K. pneumoniae ,colistin ,mcr ,antimicrobial resistance ,livestock ,transmission ,Microbiology ,QR1-502 - Published
- 2024
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16. American crocodiles (Crocodylus acutus: Reptilia: Crocodilidae) visiting the facilities of a freshwater aquaculture of the Northern Pacific region, Costa Rica, carry tetracycline-resistant Escherichia coli
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Rafael Hernán Mateus-Vargas, Verónica Arias-Pérez, Iván Sandoval-Hernández, Jens Andre Hammerl, and Elías Barquero-Calvo
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antimicrobial susceptibility ,human activities ,human-animal-environment interface ,captivity ,whole-genome sequencing ,plasmid carriage ,Veterinary medicine ,SF600-1100 - Abstract
Apex predators are exposed to antimicrobial compounds and resistant microbes, which accumulate at different trophic levels of the related ecosystems. The study aimed to characterize the presence and the antimicrobial resistance patterns of fecal Escherichia coli isolated from cloacal swab samples obtained from wild-living American crocodiles (Crocodylus acutus) (n = 53). Sampling was conducted within the distinctive context of a freshwater-intensive aquaculture farm in Costa Rica, where incoming crocodiles are temporarily held in captivity before release. Phenotypic antimicrobial susceptibility profiles were determined in all isolates, while resistant isolates were subjected to whole-genome sequencing and bioinformatics analyses. In total, 24 samples contained tetracycline-resistant E. coli (45.3%). Isolates carried either tet(A), tet(B), or tet(C) genes. Furthermore, genes conferring resistance to ß-lactams, aminoglycosides, fosfomycin, sulfonamides, phenicol, quinolones, trimethoprim, and colistin were detected in single isolates, with seven of them carrying these genes on plasmids. Genome sequencing further revealed that sequence types, prevalence of antibiotic resistance carriage, and antibiotic resistance profiles differed between the individuals liberated within the next 24 h after their capture in the ponds and those liberated from enclosures after longer abodes. The overall presence of tetracycline-resistant E. coli, coupled with potential interactions with various anthropogenic factors before arriving at the facilities, hinders clear conclusions on the sources of antimicrobial resistance for the studied individuals. These aspects hold significant implications for both the aquaculture farm’s biosecurity and the planning of environmental monitoring programs using such specimens. Considering human-crocodile conflicts from the One Health perspective, the occurrence of antimicrobial resistance underscores the importance of systematical surveillance of antibiotic resistance development in American crocodiles.
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- 2024
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17. Tracing clinically-relevant antimicrobial resistances in Acinetobacter baumannii-calcoaceticus complex across diverse environments: A study spanning clinical, livestock, and wastewater treatment settings
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Mykhailo Savin, Esther Sib, Celine Heinemann, Vanessa M. Eichel, Dennis Nurjadi, Marian Klose, Jens Andre Hammerl, Ulrike Binsker, and Nico T. Mutters
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One Health ,A. baumannii ,Clinics ,Slaughterhouse ,Wastewater ,Transformation ,Environmental sciences ,GE1-350 - Abstract
Acinetobacter baumannii has become a prominent nosocomial pathogen, primarily owing to its remarkable ability to rapidly acquire resistance to a wide range of antimicrobial agents and its ability to persist in diverse environments. However, there is a lack of data on the molecular epidemiology and its potential implications for public health of A. baumannii strains exhibiting clinically significant resistances that originate from non-clinical environments.Therefore, the genetic characteristics and resistance mechanisms of 80 A. baumannii-calcoaceticus (ABC) complex isolates, sourced from environments associated with poultry and pig production, municipal wastewater treatment plants (WWTPs), and clinical settings, were investigated.In total, our study classified 54 isolates into 29 previously described sequence types (STs), while 26 isolates exhibited as-yet-unassigned STs. We identified a broad range of A. baumannii STs originating from poultry and pig production environments (e.g., ST10, ST238, ST240, ST267, ST345, ST370, ST372, ST1112 according to Pasteur scheme). These STs have also been documented in clinical settings worldwide, highlighting their clinical significance. These findings also raise concerns about the potential zoonotic transmission of certain STs associated with livestock environments. Furthermore, we observed that clinical isolates exhibited the highest diversity of antimicrobial resistance genes (ARGs). In contrast to non-clinical isolates, clinical isolates typically carried a significantly higher number of ARGs, ranging from 10 to 15. They were also the exclusive carriers of biocide resistance genes and acquired carbapenemases (blaOXA-23, blaOXA-58, blaOXA-72, blaGIM-1, blaNDM-1). Additionally, we observed that clinical strains displayed an increased capacity for carrying plasmids and undergoing genetic transformation. This heightened capability could be linked to the intense selective pressures commonly found within clinical settings.Our study provides comprehensive insights into essential aspects of ABC isolates originating from livestock-associated environments and clinical settings. We explored their resistance mechanisms and potential implications for public health, providing valuable knowledge for addressing these critical issues.
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- 2024
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18. Antimicrobial Resistance Surveillance: Data Harmonisation and Data Selection within Secondary Data Use
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Sinja Bleischwitz, Tristan Salomon Winkelmann, Yvonne Pfeifer, Martin Alexander Fischer, Niels Pfennigwerth, Jens André Hammerl, Ulrike Binsker, Jörg B. Hans, Sören Gatermann, Annemarie Käsbohrer, Guido Werner, and Lothar Kreienbrock
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One Health ,molecular surveillance ,cluster analysis ,data collection ,Enterobacteriaceae ,multidrug resistance ,Therapeutics. Pharmacology ,RM1-950 - Abstract
Resistance to last-resort antibiotics is a global threat to public health. Therefore, surveillance and monitoring systems for antimicrobial resistance should be established on a national and international scale. For the development of a One Health surveillance system, we collected exemplary data on carbapenem and colistin-resistant bacterial isolates from human, animal, food, and environmental sources. We pooled secondary data from routine screenings, hospital outbreak investigations, and studies on antimicrobial resistance. For a joint One Health evaluation, this study incorporates epidemiological metadata with phenotypic resistance information and molecular data on the isolate level. To harmonise the heterogeneous original information for the intended use, we developed a generic strategy. By defining and categorising variables, followed by plausibility checks, we created a catalogue for prospective data collections and applied it to our dataset, enabling us to perform preliminary descriptive statistical analyses. This study shows the complexity of data management using heterogeneous secondary data pools and gives an insight into the early stages of the development of an AMR surveillance programme using secondary data.
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- 2024
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19. Identifying fit-for purpose methods for monitoring fish communities
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Constanze Hammerl, Christian Möllmann, and Daniel Oesterwind
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underwater video ,passive gears ,hydroacoustics ,marine protected areas ,eDNA ,offshore wind farms ,Science ,General. Including nature conservation, geographical distribution ,QH1-199.5 - Abstract
Scientific monitoring is a fundamental basis of scientific advice. Among others, monitoring aims at contributing towards understanding the influence of anthropogenic use (e.g. fisheries), the health of a stock and individuum and effectiveness of management and conservation measures (e.g. MPAs). Monitoring of demersal and benthic fish communities is often based on invasive methods like bottom trawling, however in some cases less invasive methods might be available. The need for developing alternative and less invasive monitoring methods is supported by an increasing number of Marine Protected Areas and Windfarms where traditional methods such as trawls cannot be deployed due to conservational or technical and safety reasons. To support the development of new monitoring concepts, we conducted a literature review to identify limits and opportunities of methods that are already available. Furthermore, we present a fit-for purpose guide that can help identifying the appropriate method for individual purposes. We defined eight different methods which were analyzed using four different criteria and listed their advantages and disadvantages. We further apply this guide to monitoring in Marine Protected Areas in the Baltic Sea as a case study, indicating that besides traditional bottom trawling, alternative and less invasive methods could be sufficient for specific research purposes. We therefore, encourage scientists and managers to consider alternative data collection methods to minimize environmental impact of scientific sampling. However, our results also indicate that most of the methods still need further refinement especially regarding sampling design, standardization of methods and comparability with established survey methods.
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- 2024
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20. Modified conformal extensions
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Hammerl, Matthias, Sagerschnig, Katja, Šilhan, Josef, and Žádník, Vojtěch
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- 2023
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21. Impact of climate change on foodborne infections and intoxications
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Jessica Dietrich, Jens-Andre Hammerl, Annette Johne, Oliver Kappenstein, Christopher Loeffler, Karsten Nöckler, Bettina Rosner, Astrid Spielmeyer, Istvan Szabo, and Martin H. Richter
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campylobacter ,salmonella ,vibrio ,cryptosporidium ,giardia ,marine biotoxins ,one health ,Medicine - Abstract
Background: Temperature, precipitation, and humidity are important factors that can influence the spread, reproduction, and survival of pathogens. Climate change affects these factors, resulting in higher air and water temperatures, increased precipitation, or water scarcity. Climate change may thus have an increasing impact on many infectious diseases. Methods: The present review considers those foodborne pathogens and toxins in animal and plant foods that are most relevant in Germany, on the basis of a selective literature review: the bacterial pathogens of the genera Salmonella, Campylobacter and Vibrio, parasites of the genera Cryptosporidium and Giardia, and marine biotoxins. Results: As climate change continues to progress, all infections and intoxications discussed here can be expected to increase in Germany. Conclusions: The expected increase in foodborne infections and intoxications presents a growing public health risk in Germany.
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- 2023
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22. Correction to: Gender‑specific distribution of knee morphology according to CPAK and functional phenotype classification: analysis of 8739 osteoarthritic knees prior to total knee arthroplasty using artificial intelligence
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Huber, Stephanie, Mitterer, Jennyfer A., Vallant, Sascha M., Simon, Sebastian, Hanak-Hammerl, Florian, Schwarz, Gilbert M., Klasan, Antonio, and Hofstaetter, Jochen G.
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- 2023
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23. 361 T cell receptor specific for tumor-restricted Ropporin-1 to treat triple negative breast cancer
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John WM Martens, Reno Debets, Justine Michaux, Michal Bassani-Sternberg, Dian Kortleve, Sonja Buschow, Monique de Beijer, Dora Hammerl, Mandy Van Brakel, Rebecca Wijers, Daphne Roelofs, Madelon Badoux, Mieke A Timmermans, Anita C Liao, Erik Danen, and Rachel JM Abbott
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Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Published
- 2023
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24. Genetic characterization of a multidrug-resistant Salmonella enterica serovar Agona isolated from a dietary supplement in Germany
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Lee Julia Bartsch, Maria Borowiak, Carlus Deneke, Josephine Gruetzke, Jens-Andre Hammerl, Burkhard Malorny, Istvan Szabo, Thomas Alter, Kim Katherine Nguyen, and Jennie Fischer
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Salmonella Agona ,dietary supplement ,whole genome sequencing ,antimicrobial resistance ,plasmid ,Microbiology ,QR1-502 - Abstract
Salmonella enterica subsp. enterica serovar Agona has a history of causing food-borne outbreaks and any emergence of multidrug-resistant (MDR) isolates in novel food products is of concern. Particularly, in food products frequently consumed without sufficient heating prior to consumption. Here, we report about the MDR isolate, 18-SA00377, which had been isolated from a dietary supplement in Germany in 2018 and submitted to the German National Reference Laboratory for Salmonella. WGS-based comparative genetic analyses were conducted to find a potential reservoir of the isolate itself or mobile genetic elements associated with MDR. As a phylogenetic analysis did not yield any closely related S. Agona isolates, either globally or from Germany, a detailed analysis of the largest plasmid (295,499 bp) was performed as it is the main carrier of resistances. A combined approach of long-read and short-read sequencing enabled the assembly of the isolate’s chromosome and its four plasmids. Their characterization revealed the presence of 23 different antibiotic resistance genes (ARGs), conferring resistance to 12 different antibiotic drug classes, as well as genes conferring resistance to six different heavy metals. The largest plasmid, pSE18-SA00377-1, belongs to the IncHI2 plasmid family and carries 16 ARGs, that are organized as two distinct clusters, with each ARG associated with putative composite transposons. Through a two-pronged approach, highly similar plasmids to pSE18-SA00377-1 were identified in the NCBI database and a search for Salmonella isolates with a highly similar ARG resistance profile was conducted. Mapping and structural comparisons between pSE18-SA00377-1 and these plasmids and Salmonella isolates showed that both the plasmid backbone and identical or similar ARG clusters can be found not only in Salmonella isolates, originating mostly from a wide variety of livestock, but also in a diverse range of bacterial genera of varying geographical origins and isolation sources. Thus, it can be speculated that the host range of pSE18-SA00377-1 is not restricted to Salmonella and its spread already occurred in different bacterial populations. Overall, this hints at a complex history for pSE18-SA00377-1 and highlights the importance of surveilling multidrug-resistant S. enterica isolates, especially in novel food items that are not yet heavily regulated.
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- 2023
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25. Disturbances in microbial skin recolonization and cutaneous immune response following allogeneic stem cell transfer
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Bayer, Nadine, Hausman, Bela, Pandey, Ram Vinay, Deckert, Florian, Gail, Laura-Marie, Strobl, Johanna, Pjevac, Petra, Krall, Christoph, Unterluggauer, Luisa, Redl, Anna, Bachmayr, Victoria, Kleissl, Lisa, Nehr, Marion, Kirkegaard, Rasmus, Makristathis, Athanasios, Watzenboeck, Martin L., Nica, Robert, Staud, Clement, Hammerl, Lukas, Wohlfarth, Philipp, Ecker, Rupert C., Knapp, Sylvia, Rabitsch, Werner, Berry, David, and Stary, Georg
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- 2022
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26. Genomic Evidence of mcr-1.26 IncX4 Plasmid Transmission between Poultry and Humans
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Ulrike Binsker, Kathrin Oelgeschläger, Bernd Neumann, Guido Werner, Annemarie Käsbohrer, and Jens A. Hammerl
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Escherichia coli ,colistin ,horizontal gene transfer ,plasmid-mediated resistance ,transfer ,mcr ,Microbiology ,QR1-502 - Abstract
ABSTRACT Colistin is still commonly used and misused in animal husbandry driving the evolution and dissemination of transmissible plasmid-mediated colistin resistance (mcr). mcr-1.26 is a rare variant and, so far, has only been detected in Escherichia coli obtained from a hospitalized patient in Germany in 2018. Recently, it was also notified in fecal samples from a pigeon in Lebanon. We report on the presence of 16 colistin-resistant, mcr-1.26-carrying extended-spectrum beta-lactamase (ESBL)-producing and commensal E. coli isolated from poultry samples in Germany, of which retail meat was the most common source. Short- and long-read genome sequencing and bioinformatic analyses revealed the location of mcr-1.26 exclusively on IncX4 plasmids. mcr-1.26 was identified on two different IncX4 plasmid types of 33 and 38 kb and was associated with an IS6-like element. Based on the genetic diversity of E. coli isolates, transmission of the mcr-1.26 resistance determinant is mediated by horizontal transfer of IncX4 plasmids, as confirmed by conjugation experiments. Notably, the 33-kb plasmid is highly similar to the plasmid reported for the human sample. Furthermore, we identified the acquisition of an additional beta-lactam resistance linked to a Tn2 transposon on the mcr-1.26 IncX4 plasmids of three isolates, indicating progressive plasmid evolution. Overall, all described mcr-1.26-carrying plasmids contain a highly conserved core genome necessary for colistin resistance development, transmission, replication, and maintenance. Variations in the plasmid sequences are mainly caused by the acquisition of insertion sequences and alteration in intergenic sequences or genes of unknown function. IMPORTANCE Evolutionary events causing the emergence of new resistances/variants are usually rare and challenging to predict. Conversely, common transmission events of widespread resistance determinants are quantifiable and predictable. One such example is the transmissible plasmid-mediated colistin resistance. The main determinant, mcr-1, has been notified in 2016 but has successfully established itself in multiple plasmid backbones in diverse bacterial species across all One Health sectors. So far, 34 variants of mcr-1 are described, of which some can be used for epidemiological tracing-back analysis to identify the origin and transmission dynamics of these genes. Here, we report the presence of the rare mcr-1.26 gene in E. coli isolated from poultry since 2014. Based on the temporal occurrence and high similarity of the plasmids between poultry and human isolates, our study provides first indications for poultry husbandry as the primary source of mcr-1.26 and its transmission between different niches.
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- 2023
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27. Why leaders are important for cross-functional teams: Moderating role of supportive leadership on knowledge hiding
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Anh Don Ton, Laszlo Hammerl, Dennis Weber, Oliver Kremer, and Gabor Szabo-Szentgroti
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information retention ,management support ,organizational citizenship behavior ,team effectiveness ,trust ,Business ,HF5001-6182 - Abstract
Knowledge exchange has been a critical factor for cross-functional teams to master different tasks and problems and promote innovation. Cross-functional teams rely on the direct cooperation of senior employees from different departments, often with converging aims, leadership, culture, and communication. However, with the ever-increasing complexity in business decisions, decision-makers invested in the manufacturing industry sector need the support of a diverse team as an advisory tool to put well-thought measures into effect. The aim of this study is to analyze how cross-functional teams in commerce and industry rely on different key performance indicators to limit knowledge hiding. This paper conducted a quantitative study of 130 individual participants working in cross-functional teams in Germany. It also adapted multiple linear regression and used a conceptual model impacting the relationship between team performance, trust, and organizational citizenship behavior, including the moderating role of leadership. The disruptive effect of knowledge hiding was contextualized. The results indicate that team performance is directly affected by the selected variables. Furthermore, it is limited to knowledge hiding, while trust and the use of adequate leadership help to retain knowledge retention. Lastly, organizational citizenship behavior was found as the paramount factor, supported by individually tailored leadership methods, to foster information exchange and thereby promote organization-wide learning.
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- 2022
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28. Harmonisation of in-silico next-generation sequencing based methods for diagnostics and surveillance
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J. Nunez-Garcia, M. AbuOun, N. Storey, M. S. Brouwer, J. F. Delgado-Blas, S. S. Mo, N. Ellaby, K. T. Veldman, M. Haenni, P. Châtre, J. Y. Madec, J. A. Hammerl, C. Serna, M. Getino, R. La Ragione, T. Naas, A. A. Telke, P. Glaser, M. Sunde, B. Gonzalez-Zorn, M. J. Ellington, and M. F. Anjum
- Subjects
Medicine ,Science - Abstract
Abstract Improvements in cost and speed of next generation sequencing (NGS) have provided a new pathway for delivering disease diagnosis, molecular typing, and detection of antimicrobial resistance (AMR). Numerous published methods and protocols exist, but a lack of harmonisation has hampered meaningful comparisons between results produced by different methods/protocols vital for global genomic diagnostics and surveillance. As an exemplar, this study evaluated the sensitivity and specificity of five well-established in-silico AMR detection software where the genotype results produced from running a panel of 436 Escherichia coli were compared to their AMR phenotypes, with the latter used as gold-standard. The pipelines exploited previously known genotype–phenotype associations. No significant differences in software performance were observed. As a consequence, efforts to harmonise AMR predictions from sequence data should focus on: (1) establishing universal minimum to assess performance thresholds (e.g. a control isolate panel, minimum sensitivity/specificity thresholds); (2) standardising AMR gene identifiers in reference databases and gene nomenclature; (3) producing consistent genotype/phenotype correlations. The study also revealed limitations of in-silico technology on detecting resistance to certain antimicrobials due to lack of specific fine-tuning options in bioinformatics tool or a lack of representation of resistance mechanisms in reference databases. Lastly, we noted user friendliness of tools was also an important consideration. Therefore, our recommendations are timely for widespread standardisation of bioinformatics for genomic diagnostics and surveillance globally.
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- 2022
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29. Characterization of Temperate LPS-Binding Bordetella avium Phages That Lack Superinfection Immunity
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Dorothee Serian, Yury Churin, Jens André Hammerl, Manfred Rohde, Arne Jung, Anja Müller, Min Yue, and Corinna Kehrenberg
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Bordetella avium ,bacteriophages ,life cycle ,phage receptor ,Microbiology ,QR1-502 - Abstract
ABSTRACT Bordetella avium causes a highly infectious upper respiratory tract disease in turkeys and other poultry with high economic losses. Considering the antimicrobial resistance crisis, bacteriophages (phages) may be an alternative approach for treating bacterial infections such as bordetellosis. Here, we describe seven B. avium phages, isolated from drinking water and feces from chicken and turkey farms. They showed strong bacteriolytic activity with a broad host range and used lipopolysaccharides (LPS) as a host receptor for their adsorption. All phages are myoviruses based on their structure observed by transmission electron microscopy. Genome sequence analyses revealed genome assembly sizes ranging from 39,087 to 43,144 bp. Their permutated genomes were organized colinearly, with a conserved module order, and were packed according to a predicted headful packing strategy. Notably, they contained genes encoding putative markers of lysogeny, indicative of temperate phages, despite their lytic phenotype. Further investigation revealed that the phages could indeed undergo a lysogenic life cycle with varying frequency. However, the lysogenic bacteria were still susceptible to superinfection with the same phages. This lack of stable superinfection immunity after lysogenization appears to be a characteristic feature of B. avium phages, which is favorable in terms of a potential therapeutic use of phages for the treatment of avian bordetellosis. IMPORTANCE To maintain the effectiveness of antibiotics over the long term, alternatives to treat infectious diseases are urgently needed. Therefore, phages have recently come back into focus as they can specifically infect and lyse bacteria and are naturally occurring. However, there is little information on phages that can infect pathogenic bacteria from animals, such as the causative agent of bordetellosis of poultry, B. avium. Therefore, in this study, B. avium phages were isolated and comprehensively characterized, including whole-genome analysis. Although phenotypically the phages were thought to undergo a lytic cycle, we demonstrated that they undergo a lysogenic phase, but that infection does not confer stable host superinfection immunity. These findings provide important information that could be relevant for potential biocontrol of avian bordetellosis by using phage therapy.
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- 2023
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30. Characterization of qnrB-carrying plasmids from ESBL- and non-ESBL-producing Escherichia coli
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Katharina Juraschek, Janina Malekzadah, Burkhard Malorny, Annemarie Käsbohrer, Stefan Schwarz, Diana Meemken, and Jens Andre Hammerl
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E. coli ,qnrB ,Fluoroquinolone ,Plasmids ,Inc-group ,Biotechnology ,TP248.13-248.65 ,Genetics ,QH426-470 - Abstract
Abstract Background Escherichia coli carrying clinically important antimicrobial resistances [i.e., against extended-spectrum-beta-lactamases (ESBL)] are of high concern for human health and are increasingly detected worldwide. Worryingly, they are often identified as multidrug-resistant (MDR) isolates, frequently including resistances against quinolones/fluoroquinolones. Results Here, the occurrence and genetic basis of the fluoroquinolone resistance enhancing determinant qnrB in ESBL-/non-ESBL-producing E. coli was investigated. Overall, 33 qnrB-carrying isolates out of the annual German antimicrobial resistance (AMR) monitoring on commensal E. coli (incl. ESBL-/AmpC-producing E. coli) recovered from food and livestock between 2013 and 2018 were analysed in detail. Whole-genome sequencing, bioinformatics analyses and transferability evaluation was conducted to characterise the prevailing qnrB-associated plasmids. Furthermore, predominant qnrB-carrying plasmid-types were subjected to in silico genome reconstruction analysis. In general, the qnrB-carrying E. coli were found to be highly heterogenic in their multilocus sequence types (STs) and their phenotypic resistance profiles. Most of them appeared to be MDR and exhibited resistances against up to ten antimicrobials of different classes. With respect to qnrB-carrying plasmids, we found qnrB19 located on small Col440I plasmids to be most widespread among ESBL-producing E. coli from German livestock and food. This Col440I plasmid-type was found to be highly conserved by exhibiting qnrB19, a pspF operon and different genes of unassigned function. Furthermore, we detected plasmids of the incompatibility groups IncN and IncH as carriers of qnrB. All qnrB-carrying plasmids also exhibited virulence factors and various insertion sequences (IS). The majority of the qnrB-carrying plasmids were determined to be self-transmissible, indicating their possible contribution to the spread of resistances against (fluoro)quinolones and other antimicrobials. Conclusion In this study, a diversity of different plasmid types carrying qnrB alone or in combination with other resistance determinants (i.e., beta-lactamase genes) were found. The spread of these plasmids, especially those carrying antimicrobial resistance genes against highest priority critically important antimicrobial agents, is highly unfavourable and can pose a threat for public health. Therefore, the dissemination pathways and evolution of these plasmids need to be further monitored.
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- 2022
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31. Impact and Diversity of ESBL-Producing Klebsiella pneumoniae Recovered from Raw Chicken Meat Samples in Türkiye
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Cemil Kürekci, Özlem Ünaldı, Seyda Şahin, Isidro García-Meniño, and Jens Andre Hammerl
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multidrug resistance ,K. pneumoniae ,One Health ,food ,zoonosis ,risk evaluation ,Therapeutics. Pharmacology ,RM1-950 - Abstract
The interrelationship between human, animal and environmental sectors leads to the spread of antibiotic resistance due to selective pressures, evolutionary traits and genomic evolution. In particular, the frequent use of antibiotics in livestock inevitably influences the emergence of specific resistance determinants in human strains, associated with reduced treatment options in clinical therapy. In this study, ESBL-producing Klebsiella pneumoniae strains isolated from chicken meat samples were evaluated for public health implications in Türkiye. Whole-genome sequencing was used for genetic dissection and phylogenetic comparison of their genomes. The isolates were assigned to four MLST types (ST147, ST37, ST2747 and ST219); two of them were found to represent the ST147 clone associated with severe human infections worldwide. In addition to cephalosporins, high resistance levels to quinolones/fluoroquinolones were identified phenotypically, caused by acquired resistance genes and chromosomal point variations. One isolate was also found to carry the qacE∆1 efflux transporter gene, which confers tolerance to quaternary ammonium compounds. The detection of virulence genes (i.e., that coding for enterobactin) associated with the pathogenicity of K. pneumoniae suggests a public health impact. Thus, comprehensive information on the occurrence and impact of K. pneumoniae from livestock is needed to derive appropriate management strategies for consumer protection. In this study, it was shown that poultry meat serves as a reservoir of clinically emerging multidrug-resistant high-risk clones.
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- 2023
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32. Genetic and Phenotypic Virulence Potential of Non-O1/Non-O139 Vibrio cholerae Isolated from German Retail Seafood
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Quantao Zhang, Thomas Alter, Eckhard Strauch, Jens Andre Hammerl, Keike Schwartz, Maria Borowiak, Carlus Deneke, and Susanne Fleischmann
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non-O1/non-O139 Vibrio cholerae ,seafood ,genetic and phenotypic characterization ,virulence potential ,antimicrobial resistance ,Biology (General) ,QH301-705.5 - Abstract
Non-O1 and non-O139 Vibrio cholerae (NOVC) can cause gastrointestinal infections in humans. Contaminated food, especially seafood, is an important source of human infections. In this study, the virulence potential of 63 NOVC strains isolated from retail seafood were characterized at the genotypic and phenotypic levels. Although no strain encoded the cholera toxin (CTX) and the toxin-coregulated pilus (TCP), several virulence factors, including the HlyA hemolysin, the cholix toxin ChxA, the heat-stable enterotoxin Stn, and genes coding for the type 3 and type 6 secretion systems, were detected. All strains showed hemolytic activity against human and sheep erythrocytes: 90% (n = 57) formed a strong biofilm, 52% (n = 33) were highly motile at 37 °C, and only 8% (n = 5) and 14% (n = 9) could resist ≥60% and ≥40% human serum, respectively. Biofilm formation and toxin regulation genes were also detected. cgMLST analysis demonstrated that NOVC strains from seafood cluster with clinical NOVC strains. Antimicrobial susceptibility testing (AST) results in the identification of five strains that developed non-wildtype phenotypes (medium and resistant) against the substances of the classes of beta-lactams (including penicillin, carbapenem, and cephalosporin), polymyxins, and sulphonamides. The phenotypic resistance pattern could be partially attributed to the acquired resistance determinants identified via in silico analysis. Our results showed differences in the virulence potential of the analyzed NOVC isolated from retail seafood products, which may be considered for further pathogenicity evaluation and the risk assessment of NOVC isolates in future seafood monitoring.
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- 2023
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33. Environmental assessment of non-metallic reinforcement for concrete structures as an alternative to steel reinforcement
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Nadine Stoiber, Mathias Hammerl, and Benjamin Kromoser
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concrete structures ,environmental impact ,frp reinforcement ,life cycle assessment ,non-metallic reinforcement ,Engineering (General). Civil engineering (General) ,TA1-2040 - Abstract
The concrete industry accounts for a significant amount of CO2 emissions worldwide. One approach to counter this issue includes material reduction of structural components via the use of non-metallic reinforcement, such as carbon, glass and basalt fibre reinforced polymers. On the one hand, non-metallic reinforcement. However, as its environmental impact has not been sufficiently investigated yet, a Life Cycle Assessment of the production phase is presented within this paper. In a first step, the environmental impact of the sole various reinforcement components and types is compared to each other per mass, per tensile or rather yield strength as well as density unit, at which an environmental disadvantage of especially carbon-fibre reinforced polymers is apparent in most cases. In a further step, a focus is put on applying the environmental data of carbon-fibre reinforced polymers to a pedestrian bridge, which is finally compared to a conventionally reinforced concrete bridge and a steel bridge with similar boundary conditions. The latter results indicate that an adequate application of carbon-fibre reinforcement in structural components has the potential to lead to designs of less environmental impact in comparison to conventionally reinforced pendants.
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- 2022
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34. Striatal Lacunar Infarction in a Late Preterm Infant Born to a Mother with Active Peripartum SARS-CoV-2 Infection
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Christoph Hochmayr, Marlene Hammerl, Ira Winkler, Gisela Schweigmann, Ursula Kiechl-Kohlendorfer, Elke Griesmaier, and Anna Posod
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Pediatrics ,RJ1-570 - Abstract
Background. The current literature suggests that neonatal severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infections generally have a mild course. Data on how in utero exposure to maternal infection affects neonatal health outcomes are limited, but there is evidence that neurological damage to the fetus and thromboembolic events may occur. Case Presentation. We describe the case of a late preterm infant, who presented with striatal lacunar infarction in the neonatal period, born to a mother with active peripartum SARS-CoV-2 infection. Diagnostic workup did not identify risk factors apart from the maternal SARS-CoV-2 infection. Repeated reverse transcription-polymerase chain reaction (RT-PCR) tests for SARS-CoV-2 using oropharyngeal swab specimens of the patient were negative. IgG, but not IgM antibodies against spike protein S1 receptor-binding domain (S1RBD) epitope were detectable in umbilical cord blood and neonatal serum collected at 48 hours of life. Anti-SARS-CoV-2 total antibody titers against nucleocapsid protein in umbilical cord blood were negative. Conclusions. Bearing in mind a possible association of in utero exposure to SARS-CoV-2 and neonatal thromboembolic events, neonatologists should be aware of these complications even in well-appearing preterm infants.
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- 2023
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35. Investigation of secretoneurin as a potential biomarker of brain injury in very preterm infants: A pilot study.
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Anna Posod, Karina Wechselberger, Yasmin Pellkofer, Marlene Hammerl, Martina Urbanek, Eva Huber, Ursula Kiechl-Kohlendorfer, and Elke Griesmaier
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Medicine ,Science - Abstract
Neurodevelopmental impairment is a significant complication among survivors of preterm birth. To improve outcomes, reliable biomarkers for early detection of brain injury and prognostic assessment are required. Secretoneurin is a promising early biomarker of brain injury in adults and full-term neonates suffering from perinatal asphyxia. Data on preterm infants is currently lacking. The aim of this pilot study was to determine secretoneurin concentrations in preterm infants in the neonatal period, and to assess secretoneurin's potential as a biomarker of preterm brain injury. We included 38 very preterm infants (VPI) born at
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- 2023
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36. Characterization of qnrB-carrying plasmids from ESBL- and non-ESBL-producing Escherichia coli
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Juraschek, Katharina, Malekzadah, Janina, Malorny, Burkhard, Käsbohrer, Annemarie, Schwarz, Stefan, Meemken, Diana, and Hammerl, Jens Andre
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- 2022
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37. Harmonisation of in-silico next-generation sequencing based methods for diagnostics and surveillance
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Nunez-Garcia, J., AbuOun, M., Storey, N., Brouwer, M. S., Delgado-Blas, J. F., Mo, S. S., Ellaby, N., Veldman, K. T., Haenni, M., Châtre, P., Madec, J. Y., Hammerl, J. A., Serna, C., Getino, M., La Ragione, R., Naas, T., Telke, A. A., Glaser, P., Sunde, M., Gonzalez-Zorn, B., Ellington, M. J., and Anjum, M. F.
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- 2022
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38. UR: SMART–A tool for analyzing social media content
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Schwaiger, Josef, Hammerl, Timo, Florian, Johannsen, and Leist, Susanne
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- 2021
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39. The Novel Yersinia enterocolitica Telomere Phage vB_YenS_P840 Is Closely Related to PY54, but Reveals Some Striking Differences
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Julia Anabell Bräuer, Jens Andre Hammerl, Sabrin El-Mustapha, Julius Fuhrmann, Andrea Barac, and Stefan Hertwig
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Yersinia ,phage ,telomere ,plasmid prophage ,regulation ,PY54 ,Microbiology ,QR1-502 - Abstract
Telomere phages are a small group of temperate phages, whose prophages replicate as a linear plasmid with covalently closed ends. They have been isolated from some Enterobacteriaceae and from bacterial species living in aquatic environments. Phage PY54 was the first Yersinia (Y.) enterocolitica telomere phage isolated from a nonpathogenic O:5 strain, but recently a second telomeric Yersinia phage (vB_YenS_P840) was isolated from a tonsil of a wild boar in Germany. Both PY54 and vB_YenS_P840 (P840) have a siphoviridal morphology and a similar genome organization including the primary immunity region immB and telomere resolution site telRL. However, whereas PY54 only possesses one prophage repressor for the lysogenic cycle, vB_YenS_P840 encodes two. The telRL region of this phage was shown to be processed by the PY54 protelomerase under in vivo conditions, but unlike with PY54, a flanking inverted repeat was not required for processing. A further substantial difference between the phages is their host specificity. While PY54 infects Y. enterocolitica strains belonging to the serotypes O:5 and O:5,27, vB_YenS_P840 exclusively lyses O:3 strains. As the tail fiber and tail fiber assembly proteins of the phages differ significantly, we introduced the corresponding genes of vB_YenS_P840 by transposon mutagenesis into the PY54 genome and isolated several mutants that were able to infect both serotypes, O:5,27 and O:3.
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- 2023
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40. Spatial immunophenotypes predict response to anti-PD1 treatment and capture distinct paths of T cell evasion in triple negative breast cancer
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Dora Hammerl, John W. M. Martens, Mieke Timmermans, Marcel Smid, Anita M. Trapman-Jansen, Renée Foekens, Olga I. Isaeva, Leonie Voorwerk, Hayri E. Balcioglu, Rebecca Wijers, Iris Nederlof, Roberto Salgado, Hugo Horlings, Marleen Kok, and Reno Debets
- Subjects
Science - Abstract
Only a subset of triple negative breast cancer patients respond to immunotherapy. Here, the authors analysed spatial immune contextures, which can be captured by a gene classifier, in relation to genomic alterations, mechanisms of T cell evasion and response to anti-PD1 treatment.
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- 2021
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41. Dietary treatment of congenital chylothorax with skimmed breast milk
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Michaela Höck, Alexander Höller, Marlene Hammerl, Karina Wechselberger, Jakob Krösslhuber, Ursula Kiechl-Kohlendorfer, Sabine Scholl-Bürgi, and Daniela Karall
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Congenital chylothorax ,Skimmed breast milk ,Pediatrics ,RJ1-570 - Abstract
Abstract Background Congenital chylothorax (CC) is a rare but potentially life-threatening condition in newborns. It is defined as an accumulation of chyle in the pleural cavity. The few publications regarding medical management and therapeutic dietary intervention motivated us to share our experience. Methods Neonates diagnosed with congenital chylothorax and treated at Innsbruck Medical University Hospital between 2013 and 2020 (n = 6, gestational age: 36 3/7, 32 5/7, 36 4/7, 35 0/7, 35 4/7, 37 3/7 weeks) were eligible for this report. The cornerstones of treatment for chylothorax conventionally consist of chest tube drainage (CTD), respiratory support, dietary restriction of long-chain triglycerides (LCT) or total parenteral nutrition (TPN). In further course the introduction of a medium-chain triglyceride (MCT)-based formula followed by an overlapping switch to a formula with low LCT and high MCT, containing the essential long-chain fatty acids (LCFA), is attempted. In three patients we used fat-modified (skimmed) breast milk to provide a high protein and low fat diet and to avoid the discontinuation of breast milk. Results The outcome of an early introduction of LCFA in the form of skimmed breast milk after resolution of chylothorax diverse. One patient had a favourable outcome, meaning no recurrence of pleural effusion, adequate weight gain and a content mother, while another patient had a relapse of pleural effusion after the administration of skimmed milk and was therefore transitioned back to Basic F® . The CC of patient 5 was difficult due to Noonan syndrome. Two weeks after the introduction of skimmed breast milk the mother wanted to stop to express breast milk, so nutrition was changed to Basic F®. Conclusion The first-line therapy of chylothorax is a combination of respiratory stabilization and dietary modification. The use of skimmed breast milk is advisable in CC and feasible by means of a simple milk defatting procedure. It offers benefits to mothers who wish to resume breast feeding after resolution of chylothorax and has proven positive effects, above all in preterm infants as optimal nutrition with protective components superior to formula feeding. However, the nutritional analysis of the skimmed milk and the correlation to a re-accumulation of pleural fluid remains a question to be answered.
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- 2021
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42. Antibiotic-resistant bacteria, antibiotic resistance genes, and antibiotic residues in wastewater from a poultry slaughterhouse after conventional and advanced treatments
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Mykhailo Savin, Johannes Alexander, Gabriele Bierbaum, Jens Andre Hammerl, Norman Hembach, Thomas Schwartz, Ricarda Maria Schmithausen, Esther Sib, Alexander Voigt, and Judith Kreyenschmidt
- Subjects
Medicine ,Science - Abstract
Abstract Slaughterhouse wastewater is considered a reservoir for antibiotic-resistant bacteria and antibiotic residues, which are not sufficiently removed by conventional treatment processes. This study focuses on the occurrence of ESKAPE bacteria (Enterococcus spp., S. aureus, K. pneumoniae, A. baumannii, P. aeruginosa, Enterobacter spp.), ESBL (extended-spectrum β-lactamase)-producing E. coli, antibiotic resistance genes (ARGs) and antibiotic residues in wastewater from a poultry slaughterhouse. The efficacy of conventional and advanced treatments (i.e., ozonation) of the in-house wastewater treatment plant regarding their removal was also evaluated. Target culturable bacteria were detected only in the influent and effluent after conventional treatment. High abundances of genes (e.g., bla TEM, bla CTX-M-15, bla CTX-M-32, bla OXA-48, bla CMY and mcr-1) of up to 1.48 × 106 copies/100 mL were detected in raw influent. All of them were already significantly reduced by 1–4.2 log units after conventional treatment. Following ozonation, mcr-1 and bla CTX-M-32 were further reduced below the limit of detection. Antibiotic residues were detected in 55.6% (n = 10/18) of the wastewater samples. Despite the significant reduction through conventional and advanced treatments, effluents still exhibited high concentrations of some ARGs (e.g., sul1, ermB and bla OXA-48), ranging from 1.75 × 102 to 3.44 × 103 copies/100 mL. Thus, a combination of oxidative, adsorptive and membrane-based technologies should be considered.
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- 2021
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43. Knowledge management in the environment of cross-functional team coopetition: A systematic literature review
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Anh Don Ton and Laszlo Hammerl
- Subjects
competition ,cooperation ,innovation ,performance ,relationship ,Business ,HF5001-6182 ,Social sciences (General) ,H1-99 - Abstract
Knowledge is crucial, but a transient resource that decides over the success or failure of business operations. Consequently, companies aim for the most profitable method to achieve high gains and conservation of knowledge, while excluding rivals to maintain the position of economic advantage as long as possible. To maximize the efforts of knowledge generation, new concepts of organizational processes were established in recent years. To provide a conceptual foundation and identify promising niches for future studies in the important field of team coopetition, existing literature on the factors of cross-functional team coopetition was reviewed, concluding in a systematic review. For this purpose, leading peer-reviewed journals from 2010 to 2021 offered 25 articles that fall within its established search inclusion criteria. Adding to the change of stakeholder project management, the shift from traditional, cooperative-led organizational approaches towards coopetition between two or multiple rivals can lead to promising results. However, it was indicated that this concept often fails due to misleading coordination in a coopetitive tension. Current studies extracted their results from applied team management mostly on short-term organizational, financial, and technical benefits or drawbacks, excluding long-term innovation effects. Most studies were categorized into three outcomes contributing to knowledge management: performance, relationship, and innovation. As a result, it is pointed out that several factors derived from the literature significantly influence the outcomes.
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- 2021
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44. A New Lower Bound for Deterministic Truthful Scheduling
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Giannakopoulos, Yiannis, Hammerl, Alexander, and Poças, Diogo
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- 2021
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45. Multidrug-resistant Staphylococcus cohnii and Staphylococcus urealyticus isolates from German dairy farms exhibit resistance to beta-lactam antibiotics and divergent penicillin-binding proteins
- Author
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Tobias Lienen, Arne Schnitt, Jens Andre Hammerl, Stephen F. Marino, Sven Maurischat, and Bernd-Alois Tenhagen
- Subjects
Medicine ,Science - Abstract
Abstract Non-aureus staphylococci are commonly found on dairy farms. Two rarely investigated species are Staphylococcus (S.) cohnii and S. urealyticus. Since multidrug-resistant S. cohnii and S. urealyticus are known, they may serve as an antimicrobial resistance (AMR) gene reservoir for harmful staphylococcal species. In our study, nine S. cohnii and six S. urealyticus isolates from German dairy farms were analyzed by whole-genome sequencing and AMR testing. The isolates harbored various AMR genes (aadD1, str, mecA, dfrC/K, tetK/L, ermC, lnuA, fexA, fusF, fosB6, qacG/H) and exhibited non-wildtype phenotypes (resistances) against chloramphenicol, clindamycin, erythromycin, fusidic acid, rifampicin, streptomycin, tetracycline, tiamulin and trimethoprim. Although 14/15 isolates lacked the blaZ, mecA and mecC genes, they showed reduced susceptibility to a number of beta-lactam antibiotics including cefoxitin (MIC 4–8 mg/L) and penicillin (MIC 0.25–0.5 mg/L). The specificity of cefoxitin susceptibility testing for mecA or mecC gene prediction in S. cohnii and S. urealyticus seems to be low. A comparison with penicillin-binding protein (PBP) amino acid sequences of S. aureus showed identities of only 70–80% with regard to PBP1, PBP2 and PBP3. In conclusion, S. cohnii and S. urealyticus from selected German dairy farms show multiple resistances to antimicrobial substances and may carry unknown antimicrobial resistance determinants.
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- 2021
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46. Seismic control of large prehistoric rockslides in the Eastern Alps
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Patrick Oswald, Michael Strasser, Christa Hammerl, and Jasper Moernaut
- Subjects
Science - Abstract
The authors here present a multi-lake paleoseismological approach to evaluate the role of earthquakes in causing a spatio-temporal cluster of large, prehistoric rockslides between 3000 and 4200 years ago in the Eastern European Alps and for which the triggering mechanisms are still debated.
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- 2021
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47. Correction: Disturbances in microbial skin recolonization and cutaneous immune response following allogeneic stem cell transfer
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Bayer, Nadine, Hausmann, Bela, Pandey, Ram Vinay, Deckert, Florian, Gail, Laura-Marie, Strobl, Johanna, Pjevac, Petra, Krall, Christoph, Unterluggauer, Luisa, Redl, Anna, Bachmayr, Victoria, Kleissl, Lisa, Nehr, Marion, Kirkegaard, Rasmus, Makristathis, Athanasios, Watzenboeck, Martin L., Nica, Robert, Staud, Clement, Hammerl, Lukas, Wohlfarth, Philipp, Ecker, Rupert C., Knapp, Sylvia, Rabitsch, Werner, Berry, David, and Stary, Georg
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- 2023
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48. Occurrence and Genomic Characterization of Clone ST1193 Clonotype 14-64 in Uncomplicated Urinary Tract Infections Caused by Escherichia coli in Spain
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Isidro García-Meniño, Pilar Lumbreras, Luz Lestón, Mónica Álvarez-Álvarez, Vanesa García, Jens Andre Hammerl, Javier Fernández, and Azucena Mora
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uncomplicated UTI (uUTI) ,antimicrobial resistance (AMR) ,UPEC ,ST1193 ,ST131 ,fluoroquinolone resistance (FQR) ,Microbiology ,QR1-502 - Abstract
ABSTRACT We conducted a prospective, multicenter, specific pilot study on uncomplicated urinary tract infections (uUTI). One-hundred non-duplicated uropathogenic Escherichia coli (UPEC) from uUTI occurred in 2020 in women attending 15 primary care centers of a single health region of northern Spain were characterized using a clonal diagnosis approach. Among the high genetic diversity showed by 59 different phylogroup-clonotype combinations, 11 clones accounted for 46% of the isolates: B2-ST73 (CH24-30); B2-ST73 (CH24-103); B2-ST131 (CH40-30); B2-ST141 (CH52-5); B2-ST372 (CH103-9); B2-ST404 (CH14-27); B2-ST404 (CH14-807); B2-ST1193 (CH14-64); D-ST69 (CH35-27); D-ST349 (CH36-54), and F-ST59 (CH32-41). The screening of the UPEC status found that 69% of isolates carried ≥ 3 of chuA, fyuA, vat, and yfcV genes. Multidrug resistance to at least one antibiotic of ≥ 3 antimicrobial categories were exhibited by 30% of the isolates, with the highest rates of resistance against ampicillin/amoxicillin (48%), trimethoprim (35%), norfloxacin (28%), amoxicillin-clavulanic acid (26%), and trimethoprim-sulfamethoxazole (24%). None extended-spectrum beta-lactamase/carbapenemase producer was recovered. According to our results, fosfomycin and nitrofurantoin should be considered as empirical treatment of choice for uUTI by E. coli (resistance rates 4% and 2%, respectively). We uncover the high prevalence of the pandemic fluoroquinolone-resistant ST1193 clone (6%) in uUTI, which represents the first report in Spain in this pathology. The genomic analysis showed similar key traits than those ST1193 clones disseminated worldwide. Through the SNP comparison based on the core genome, the Spanish ST1193 clustered with isolates retrieved from the Enterobase, showing high genomic similarity than the global ST1193 described in the United States, Canada and Australia. IMPORTANCE Analyzing the clonal structure and antimicrobial resistance of E. coli isolates implicated in uncomplicated urinary tract infections, one of the most frequent visits managed in primary health care, is of interest for clinicians to detect changes in the dynamics of emerging uropathogenic clones associated with the spread of fluoroquinolone resistance. It can also provide consensus concerning optimal control and antibiotic prescribing.
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- 2022
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49. Prophylactic Low-Dose Paracetamol Administration for Ductal Closure and Amplitude-Integrated Electroencephalography in Preterm Infants
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Christina Schreiner, Maria Sappler, Michaela Höck, Marlene Hammerl, Vera Neubauer, Ursula Kiechl-Kohlendorfer, and Elke Griesmaier
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ductal closure ,preterm infant ,amplitude-integrated electroencephalography ,neurodevelopmental outcome ,paracetamol ,Pediatrics ,RJ1-570 - Abstract
IntroductionProphylactic low-dose paracetamol administration is used to induce closure of the ductus arteriosus in preterm infants. In our recent study we found no impairment on microstructural maturation processes in the brain of preterm infants at term-equivalent age following prophylactic low-dose paracetamol administration. We now assessed amplitude-integrated electroencephalography (aEEG) signals in preterm infants with and without exposure to prophylactic low-dose paracetamol administration.MethodsInfants
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- 2022
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50. Impact of residual fuel ash layers on the catalytic activation of K-feldspar regarding the water–gas shift reaction
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Fürsatz, Katharina, Kuba, Matthias, Janisch, Daniel, Aziaba, Kouessan, Hammerl, Christoph, Chlebda, Damian, Łojewska, Joanna, and Hofbauer, Hermann
- Published
- 2021
- Full Text
- View/download PDF
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