Publications by authors named "Ruppitsch W"

Introduction: is a widespread acid-lactic bacterium found in the environment, humans, and animal microbiota, and it also plays a role in the production of traditional food. However, the worldwide emergence of multidrug-resistant strains represents a major public health threat and is the primary reason that the genus is not recommended for the Qualified Presumption of Safety (QPS) list of the European Food Safety Authority (EFSA), raising concerns about its presence in food products.

Methods: In this study, 39 and 5 isolates were obtained from artisanal brine cheeses and dry sausages, sourced from 21 different Montenegrin producers.

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  • Antimicrobial resistance (AMR) in Enterobacterales, particularly in Escherichia coli, poses serious health and economic issues for humans and animals, highlighting the "One Health" approach to understanding this problem.
  • The study aimed to find extended-spectrum cephalosporin-resistant Enterobacterales in ruminants across Rwanda's provinces and to characterize the isolates.
  • From 454 rectal swabs collected from cattle, goats, and sheep, 64 resistant isolates were found, predominantly E. coli, with many showing multidrug-resistance and various resistance phenotypes linked to specific genes.
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  • Foodborne illnesses like listeriosis, caused by the Listeria bacteria, are a big worry for public health, especially during outbreaks.
  • Scientists collected and studied over 1800 Listeria samples from patients in Germany to understand how the bacteria spread and caused infections.
  • They found that many infection clusters lasted a long time and could affect people in different regions, with some bacteria types being more harmful than others.
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The demand for terrestrial snails as a food source is still on the increase globally, yet this has been overlooked in disease epidemiology and the spread of antimicrobial resistance. This study conducted genomic analyses of twenty strains isolated from live edible snails traded in two hubs. The isolates were subjected to MALDI-TOF MS, antimicrobial resistance testing, whole genome sequencing, and analyses for in-depth characterization.

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  • The study investigates antibiotic resistance genes in bacterial species posing risks to human and animal health, focusing on isolates from humans and poultry in Edo state, Nigeria.
  • A total of 61 isolates were tested, revealing that 77% came from human samples and 23% from poultry, with high phenotypic resistance observed across the board.
  • Whole-genome sequencing and phylogenetic analysis showed close genetic relationships among isolates, providing valuable insights into the nature of antibiotic resistance in these bacteria from a One Health perspective.
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Unlabelled: In spring 2022, an increase in metallo-β-lactamase-producing (MBL-Pa) infections was detected in a hospital in Upper Austria. To identify the source of infection and to stop further transmissions, an epidemiological outbreak investigation including whole-genome sequencing (WGS)-based typing was conducted. The final case definition included cases admitted to the hospital between 2020 and 2023 with an MBL-Pa in one of the three genomic clusters identified.

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Nanopore sequencing has shown the potential to democratize genomic pathogen surveillance due to its ease of use and low entry cost. However, recent genotyping studies showed discrepant results compared to gold-standard short-read sequencing. Furthermore, although essential for widespread application, the reproducibility of nanopore-only genotyping remains largely unresolved.

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Introduction: is an ubiquitous foodborne pathogen that represents a serious threat to public health and the food industry.

Methods: In this study Whole Genome Sequencing (WGS) was used to characterize 160 isolates obtained from 22,593 different food sources in Montenegro during the years 2014-2022.

Results: Isolates belonged to 21 different clonal complexes (CCs), 22 sequence types (STs) and 73 core genome multilocus sequence types (cgMLST) revealing a high diversity.

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() plays an important role in bovine respiratory diseases. Here we describe the complete genome of a multiresistant . The strain was isolated from the lung of a diseased, 4-month old, male Fleckvieh calf with a clinical history of bronchopneumonia in Upper Austria.

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The environmental bacterium displays an alarming increase of antibiotic-resistant strains that frequently cause outbreaks in intensive care units. Due to its prevalence in the environment and opportunistic presence in humans, molecular surveillance (including resistance marker screening) and high-resolution cluster analysis are of high relevance. Furthermore, previously described in studies is rather a species complex (KoSC) than a single species comprising at least six closely related species that are not easily differentiated by standard typing methods.

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() was recently described as a new species isolated from copper globemallow (). Here, we report the complete genome of CoE-159-22, which was obtained from traditionally produced Montenegrin cheese.

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Postweaning diarrhoea (PWD) is a frequent multifactorial disease occurring in swine stocks worldwide. Since pathogenic (.) play a pivotal role in the pathogenesis of PWD and porcine are often resistant to different antibiotics, colistin is frequently applied to treat piglets with PWD.

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  • - The study aimed to analyze the diversity of Staphylococcus aureus in cow mastitis milk samples across Rwanda, collecting 1080 samples from 279 dairy cows on 80 farms.
  • - Researchers identified 135 S. aureus isolates using advanced techniques like genotyping and antimicrobial susceptibility testing, revealing significant resistance to penicillin and tetracycline, along with diverse genetic profiles among the bacteria.
  • - Findings indicated the presence of specific clonal complexes (CCs) associated with mastitis, highlighting their potential impact on cattle health and the need for enhanced surveillance to monitor the connection between animal and human health.
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is a versatile pathogen that does not only occur in humans but also in various wild and domestic animals, including several avian species. When characterizing isolates from waterfowl, isolates were identified as atypical CC133 by DNA microarray analysis. They differed from previously sequenced CC133 strains in the presence of the collagen adhesin gene ; some also showed a different capsule type and a deviant type.

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A novel, Gram-positive, facultative anaerobe, coccoid and non-motile bacterium, designated as CoE-012-22 was isolated from dried beef sausage (the original name in Montenegro is Govedji Kulen) manufactured in the municipality of Rozaje (Montenegro) in 2021. Cells of this strain were oxidase- and catalase-negative. Growth occurred at 4-50 °C, at pH 5.

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  • Mycoplasma hyosynoviae is a bacteria found in the upper respiratory tract of pigs that can cause arthritis; however, there's limited understanding of its spread due to poor typing methods.
  • This study developed two typing methods: a conventional multi locus sequence typing (MLST) and a core genome MLST (cgMLST) based on genome sequences from various pig strains.
  • The findings showed that while both methods produced similar results, cgMLST provided more detailed differentiation of closely related strains, making it more suitable for epidemiological studies despite MLST being quicker and cheaper.
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Aims: To examine the diversity of Staphylococcus aureus isolated from nasal swabs of ruminants in Rwanda.

Methods And Results: A total of 454 nasal swabs from 203 cows, 170 goats, and 81 sheep were examined for the presence of S. aureus, and 30 S.

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The objective of this study was to characterize spp. and related organisms isolated from powder dairy products intended for consumption by adults and older adults using whole-genome sequencing (WGS), and to identify genes and traits that encode antibiotic resistance and virulence. Virulence (VGs) and antibiotic resistance genes (ARGs) were detected with the Comprehensive Antibiotic Resistance Database (CARD) platform, ResFinder, and MOB-suite tools.

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Here, we report the complete genome of strain 400431-b isolated from a nasopharyngeal swab from a 4-year-old patient presenting with a protracted course of whooping cough, vaccinated with three doses of diphtheria-tetanus-acellular pertussis-hepatitis B-poliomyelitis- type b vaccine.

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  • - The study focuses on antibiotic resistance in livestock, particularly food-producing animals, and its implications for public health, emphasizing the potential for resistant bacteria to enter the food chain.
  • - Researchers analyzed genetic characteristics of antibiotic-resistant bacteria from humans and poultry in Edo State, Nigeria, identifying 91 isolates using mass spectrometry and various testing methods to assess their resistance to 12 antibiotics.
  • - The findings revealed that several isolates, particularly from humans, carried extended-spectrum beta-lactamase (ESBL) genes, highlighting the need for a comprehensive 'One Health' approach to monitor and manage antimicrobial resistance in the region.
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Objectives: Although generic medicinal products are required to have the same qualitative and quantitative composition of the active substance as their reference originator product, patients and health care professionals express concerns about their interchangeability and safety. Therefore, the present study investigated the antimicrobial activity and pathogen mutation prevention of original and generic cefepime, linezolid and piperacillin/tazobactam against Staphylococcus aureus.

Methods: Two generic formulations of cefepime, linezolid and piperacillin/tazobactam were tested against their respective originator products.

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The objective of this study was to use whole-genome sequencing (WGS) to screen for genes encoding for antibiotic resistance, fitness and virulence in strains that had been isolated from food and powdered-milk-producing environments. Virulence (VGs) and antibiotic-resistance genes (ARGs) were detected with the Comprehensive Antibiotic Resistance Database (CARD) platform, ResFinder and PlasmidFinder tools. Susceptibility testing was performed using disk diffusion.

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Next-generation whole-genome sequencing is essential for high-resolution surveillance of bacterial pathogens, for example, during outbreak investigations or for source tracking and escape variant analysis. However, current global sequencing and bioinformatic bottlenecks and a long time to result with standard technologies demand new approaches. In this study, we investigated whether novel nanopore Q20+ long-read chemistry enables standardized and easily accessible high-resolution typing combined with core genome multilocus sequence typing (cgMLST).

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