221 results match your criteria: "Institute of Microbiology and Parasitology[Affiliation]"

Salmonella enterica subsp. serovar Infantis is the most prevalent serovar found in broilers and broiler meat and is among the top five serovars responsible for human infections in Europe. In 2008, a multidrug-resistant .

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Article Synopsis
  • Lactic acid bacteria (LAB) and bifidobacteria may harbor antimicrobial resistance (AMR), but the risk from strains used in food production is not well understood.
  • A study analyzing 474 strains found that intestinal isolates had higher rates of AMR compared to commercial strains, with 13.8% of commercial strains showing acquired resistance, mainly to tetracycline.
  • The research indicates that while intentional introduction of these bacteria into food doesn’t pose a major threat, caution is still needed with specific probiotic strains that may have a higher risk of transferring AMR in the gut.
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Novel bacterial topoisomerase inhibitors (NBTIs) are an important new class of antibacterials targeting bacterial type II topoisomerases (DNA gyrase and topoisomerase IV). Notwithstanding their potent antibacterial activity, they suffer from a detrimental class-related hERG blockage. In this study, we designed and synthesized an optimized library of NBTIs comprising different linker moieties that exhibit reduced hERG inhibition and retain inhibitory potencies on DNA gyrase and topoisomerase IV of Staphylococcus aureus and Escherichia coli, respectively, as well as potent antibacterial activities.

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Enterococci represent a significant part of the non-starter LAB microbiota of artisanal cheeses produced mainly from raw milk. Common approaches to safety evaluation of enterococci isolates include assessment of antimicrobial resistance and virulence potential. Hence, a collection of 47 (n = 22, Serbia; n = 25, Slovenia) dairy enterococcal isolates, of which (n = 28), (n = 11), (n = 5), (n = 2), and (n = 1), was analyzed.

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Alveolar echinococcosis in nutria (), invasive species in Slovenia.

Int J Parasitol Parasites Wildl

August 2022

Institute of Microbiology and Parasitology, Veterinary Faculty, University of Ljubljana, Gerbičeva 60, 1000, Ljubljana, Slovenia.

The present report describes a case of infection in nutria () culled in the central area of Slovenia. Post-mortem exam showed multiple cystic lesions in the liver. Gross examination, as well as parasitological and histopathological examinations, revealed numerous cysts of various sizes, filled with yellow clear fluid and displacing most of the liver parenchyma.

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Antioxidant and Antimicrobial Biofoil Based on Chitosan and Japanese Knotweed (, Houtt.) Rhizome Bark Extract.

Antioxidants (Basel)

June 2022

Department of Catalysis and Chemical Reaction Engineering, National Institute of Chemistry, Hajdrihova 19, 1001 Ljubljana, Slovenia.

A 70% ethanol extract of the rhizome bark of the invasive alien plant species Japanese knotweed (JKRB) with potent (in the range of vitamin C) and stable antioxidant activity was incorporated in 1% into a chitosan biofoil, which was then characterized on a lab-scale. The 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay confirmed the antioxidant activity of the JKRB biofoil upon contact with the food simulants A, B, C, and D1 (measured half-maximal inhibitory concentrations-IC) and supported the Folin-Ciocalteu assay result. The migration of the antioxidant marker, (-)-epicatechin, into all food simulants (A, B, C, D1, D2, and E) was quantified using liquid chromatography hyphenated to mass spectrometry (LC-MS).

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Genomic determinants of Furin cleavage in diverse European SARS-related bat coronaviruses.

Commun Biol

May 2022

Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Institute of Virology, Berlin, Germany.

The furin cleavage site (FCS) in SARS-CoV-2 is unique within the Severe acute respiratory syndrome-related coronavirus (SrC) species. We re-assessed diverse SrC from European horseshoe bats and analyzed the spike-encoding genomic region harboring the FCS in SARS-CoV-2. We reveal molecular features in SrC such as purine richness and RNA secondary structures that resemble those required for FCS acquisition in avian influenza viruses.

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Quantitative Risk Assessment of Exposure to subsp. (MAP) via Different Types of Milk for the Slovenian Consumer.

Foods

May 2022

Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Institute of Epidemiology, Südufer 10, 17493 Greifswald-Insel Riems, Germany.

This study aimed to assess the risk of exposure to subsp. (MAP) via milk for the Slovenian consumer. MAP is suspected to be associated with several diseases in humans, therefore the risk of exposure should be better understood.

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in Dogs and Humans in Slovenia.

J Vet Res

March 2022

Institute of Microbiology and Immunology, Faculty of Medicine, University of Ljubljana, SI-1000 Ljubljana, Slovenia.

Introduction: The prevalence of in dogs in countries bordering Slovenia ranges from 1.5% to 47.3%.

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This study aimed to investigate the possible dynamics of paratuberculosis or Johne's disease in a typical Slovenian dairy herd of about 17 cows. Paratuberculosis is a worldwide endemic disease of cattle caused by subsp. (MAP) and is associated with significant economic losses.

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Passive Disease Surveillance of Alpine Chamois () in Slovenia between 2000 and 2020.

Animals (Basel)

April 2022

Institute of Pathology, Wild Animals, Fish and Bees, Veterinary Faculty, University of Ljubljana, Gerbičeva 60, 1000 Ljubljana, Slovenia.

In this paper, we provide an overview of the causes of death of Alpine chamois () diagnosed in the national passive health surveillance of chamois in Slovenia. From 2000 to 2020, 284 free-ranging chamois provided by hunters were necropsied at the Veterinary Faculty, University of Ljubljana, Slovenia. Depending on the results of complete necropsy, histopathological, bacteriological, parasitological, and virological examinations, a descriptive data analysis was performed.

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A European-wide dataset to uncover adaptive traits of Listeria monocytogenes to diverse ecological niches.

Sci Data

April 2022

French Agency for Food, Environmental and Occupational Health & Safety (ANSES), Laboratory for Food Safety, Salmonella and Listeria Unit, Paris-Est University, 14 rue Pierre et Marie Curie, 94701, Maisons-Alfort, France.

Listeria monocytogenes (Lm) is a ubiquitous bacterium that causes listeriosis, a serious foodborne illness. In the nature-to-human transmission route, Lm can prosper in various ecological niches. Soil and decaying organic matter are its primary reservoirs.

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Serological Survey of Small Ruminant Lentivirus Infections in Free-Ranging Mouflon and Chamois in Slovenia.

Animals (Basel)

April 2022

Veterinary Faculty, Institute of Pathology, Wild Animals, Fish and Bees, University of Ljubljana, Gerbičeva 60, 1000 Ljubljana, Slovenia.

Small ruminant lentiviruses (SRLVs) belong to the genus in the family, which are responsible for the diseases maedi-visna and caprine arthritis-encephalitis in sheep and goats worldwide and are also widespread in Slovenian sheep and goats. SRLVs cause lifelong infections with chronic inflammatory lesions in various organ systems. Cross-species transmission of SRLV strains in sheep and goats is well documented, but there are few data on the ability of these viruses to infect wild ruminants.

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The stem cell theory of aging postulates that stem cells become inefficient at maintaining the original functions of the tissues. We, therefore, hypothesized that transplanting young bone marrow (BM) to old recipients would lead to rejuvenating effects on immunity, followed by improved general health, decreased frailty, and possibly life span extension. We developed a murine model of non-myeloablative heterochronic BM transplantation in which old female BALB/c mice at 14, 16, and 18(19) months of age received altogether 125.

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Detection of Herpesviruses in Wild Bird Casualties in Slovenia.

Front Vet Sci

February 2022

Institute of Poultry, Birds, Small Mammals, and Reptiles, Faculty of Veterinary Medicine, University of Ljubljana, Ljubljana, Slovenia.

The complete host range of avian herpesviruses in wild birds is unknown, and information about nucleotide sequences is available only in limited cases. The aim of this study was to detect the presence of herpesviruses in wild birds and to gain more information about their phylogenetic relationship. Oropharyngeal and cloacal swabs from 447 wild birds from 15 different orders presented as wildlife casualties were examined for herpesvirus presence with PCR targeting a fragment of the DNA polymerase gene.

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Enterococcus cecorum and Enterococcus hirae can cause locomotor problems, septicaemia, and endocarditis in broiler chickens. Understanding transmission routes and resistance patterns are essential for effective treatment. The aim of this study was to follow the same animals from the breeder flock to the hatchery and up to 14-day-old broiler chickens on the farm to find the source of E.

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Using whole-genome sequencing to assess the diversity of within an outbreak and a beekeeping operation.

Microb Genom

December 2021

Institute of Microbiology and Parasitology, Veterinary Faculty, University of Ljubljana, Gerbičeva 60, Ljubljana, Slovenia.

The spore-forming bacterium is the causative agent of American foulbrood (AFB), a devastating disease of honeybees (). In the present study, we used whole-genome sequencing (WGS) to investigate an extensive outbreak of AFB in northwestern Slovenia in 2019. A total of 59 .

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Novel TaqMan PCR Assay for the Quantification of Spores in Bee-Related Samples.

Insects

November 2021

Institute of Pathology, Wild Animals, Fish and Bees, Veterinary Faculty, University of Ljubljana, Gerbičeva 60, 1000 Ljubljana, Slovenia.

is the causative agent of American foulbrood (AFB), a devastating disease of honeybees. spore counts in bee-related samples correlate with the presence of AFB symptoms and may, therefore, be used to identify at-risk colonies. Here, we constructed a TaqMan-based real-time PCR (qPCR) assay targeting a single-copy chromosomal metalloproteinase gene for reliable quantification of .

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Salmonella enterica serovar Choleraesuis is a host-adapted serovar that causes serious infections in domestic pigs and wild boars. Here, we investigated an outbreak of salmonellosis in domestic pigs in Slovenia, 2018-2019. To assess the outbreak, 18 isolates from domestic pigs, wild boars, wild boar meat and a human patient underwent whole-genome sequencing (WGS).

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Bats are potential natural reservoirs for emerging viruses, causing deadly human diseases, such as COVID-19, MERS, SARS, Nipah, Hendra, and Ebola infections. The fundamental mechanisms by which bats are considered "living bioreactors" for emerging viruses are not fully understood. Some studies suggest that tolerance to viruses is linked to suppressing antiviral immune and inflammatory responses due to DNA damage by energy generated to fly.

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In the past few decades, the relevance of and , causing cardiopulmonary and subcutaneous dirofilariosis in dogs and cats, and of , causing canine angiostrongylosis, has steadily increased in Central and Northern Europe. In this review, a summary of published articles and additional reports dealing with imported or autochthonous cases of these parasites is provided for Central (Austria, Czechia, Germany, Hungary, Luxemburg, Poland, Slovakia, Slovenia, and Switzerland) and Northern (Denmark, Finland, Iceland, Norway, and Sweden) Europe. Research efforts focusing on spp.

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Antibiotics are frequently used for treating urinary tract infections (UTI) in dogs and cats. UTI often requires time-consuming and expensive antimicrobial susceptibility testing (AST). Alternatively, clinicians can employ Flexicult Vet, an affordable chromogenic agar with added antibiotics for in-clinic AST.

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Campylobacter jejuni is the leading bacterial food-borne pathogen in Europe. Despite the accepted limits of cultural detection of the fastidious bacterium, the "gold standard" in food microbiology is still the determination of colony-forming units (CFU). As an alternative, a live/dead differentiating qPCR has been established, using propidium monoazide (PMA) as DNA-intercalating crosslink agent for inactivating DNA from dead, membrane-compromised cells.

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