A total of 117 Campylobacter jejuni isolates from Danish turkeys were tested for the presence of seven virulence and toxin genes by PCR. One hundred seventeen (100%) isolates were positive for flaA, cadF, and ceuE gene primers. One hundred three (88%) isolates were positive for cdt gene cluster PCR detection (cdt gene cluster-PCR), whereas 101 (86.3%), 102 (87.2%), and 110 (94%) isolates were positive for cdtA-, cdtB-, and cdtC-PCR, respectively. Only 39 (33.3%) isolates were positive for virB11. Of 117 isolates, 114 (97.4%) produced cytolethal distending toxin (CDT) in Vero cell assays, 105 (89.7%) in Colon 205 assays, and 109 (93.2%) in chicken embryo cell assays. The CDT titers were determined in Vero cell assays. Of 117 isolates, 50 (42.7%) produced a CDT titer of 1:100, 29 (24.8%) of 1:50, and 27 (23%) of 1:5 to 1:10; 8 (6.8%) produced a CDT titer at undiluted supernatants and 3 (2.6%) produced no toxin. Twenty-nine C. jejuni isolates that were PCR negative for one or more individual cdt toxin genes also produced low or no CDT toxin. The high prevalence of the seven virulence and toxin genes demonstrates that these putative pathogenic determinants are widespread among Campylobacter isolates from turkeys and calls for further investigation for the elimination of Campylobacter infection in industrial turkey production and in industrial food chains.
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http://dx.doi.org/10.4315/0362-028x-67.10.2171 | DOI Listing |
Int J Clin Pediatr Dent
December 2024
Department of Dental Research Cell, Dr D Y Patil Dental College and Hospital, Dr D Y Patil Vidyapeeth, Pune, Maharashtra, India.
Background: This systematic analysis of case reports aimed to compile available knowledge and identify trends in disorder onset, symptoms, treatment, and possible interventions across individual cases associated with Lesch-Nyhan syndrome (LNS) oral self-injury.
Materials And Methods: "Lesch-Nyhan syndrome" and "oral self-mutilation" were entered as keywords in four search engines. All cases reporting the patients' demographics and documented episodes of self-mutilation, with details on treatment and management, were included.
ACS Synth Biol
January 2025
College of Life Science, Shandong First Medical University & Shandong Academy of Medical Sciences, Taian 271016, China.
Filamentous fungi are important cell factories for producing chemicals, organic acids, and enzymes. Although several genome editing tools are available for filamentous fungi, few effectively enable continuous evolution for rational engineering of complex phenotype. Here, we present CRISPR-Cas9 cytidine-base-editor (CBE) assisted evolution by continuously delivering a combinatorial sgRNA library to filamentous fungi.
View Article and Find Full Text PDFMicrob Cell Fact
January 2025
Swammerdam Institute for Life Sciences, University of Amsterdam, Science Park 904, Amsterdam, 1098 XH, The Netherlands.
Background: Ribosome pausing slows down translation and can affect protein synthesis. Improving translation efficiency can therefore be of commercial value. In this study, we investigated whether ribosome pausing occurs during production of the α-amylase AmyM by the industrial production organism Bacillus subtilis under repeated batch fermentation conditions.
View Article and Find Full Text PDFNat Commun
January 2025
Type 2 Immunity Section, Laboratory of Parasitic Diseases, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, MD, USA.
How macrophages in the tissue environment integrate multiple stimuli depends on the genetic background of the host, but this is still poorly understood. We investigate IL-4 activation of male C57BL/6 and BALB/c strain specific in vivo tissue-resident macrophages (TRMs) from the peritoneal cavity. C57BL/6 TRMs are more transcriptionally responsive to IL-4 stimulation, with induced genes associated with more super enhancers, induced enhancers, and topologically associating domains (TAD) boundaries.
View Article and Find Full Text PDFDiagn Microbiol Infect Dis
January 2025
National Reference Laboratory of Control and Monitoring of Antibiotic Resistance (NRL-CMAR), Department Microbiology, National Center of Infectious and Parasitic Diseases (NCIPD), 26 Yanko Sakazov Blvd., Sofia, Bulgaria.
Increased incidence of Clostridioides difficile infections were documented in Bulgarian hospitals during COVID-19. WGS was performed on 39 isolates from seven hospitals during 2015-2022. Antimicrobial resistance and toxin genes were inferred from genomes.
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