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Campylobacter jejuni

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https://www.readbyqxmd.com/read/28087306/molecular-epidemiological-analysis-of-human-and-chicken-derived-isolates-of-campylobacter-jejuni-in-japan-using-next-generation-sequencing
#1
Takayuki Ohishi, Kotaro Aoki, Yoshikazu Ishii, Masaru Usui, Yutaka Tamura, Michiko Kawanishi, Ohnishi Kenji, Kazuhiro Tateda
In this research, we analyzed the main sequence types (ST) and ST complexes of human- and chicken-derived isolates of Campylobacter jejuni in Japan by using multilocus sequence typing (MLST). We also analyzed lipooligosaccharide biosynthesis locus classes (LOS locus classes) and the numbers of isolates carrying genes coding resistance factors against various antibiotics, and observed their relationships. ST-21 complex was the main ST complex in isolates from humans (n = 38) and chickens (n = 25). None of the isolates showed resistance to imipenem, chloramphenicol, or erythromycin...
January 10, 2017: Journal of Infection and Chemotherapy: Official Journal of the Japan Society of Chemotherapy
https://www.readbyqxmd.com/read/28080213/campylobacter-jejuni-transducer-like-proteins-chemotaxis-and-beyond
#2
Kshipra Chandrashekhar, Issmat I Kassem, Gireesh Rajashekara
Chemotaxis, a process that mediates directional motility towards or away from chemical stimuli (chemoeffectors/ ligands that can be attractants or repellents) in the environment, plays an important role in the adaptation of Campylobacter jejuni to disparate niches. The chemotaxis system consists of core signal transduction proteins and methyl-accepting-domain-containing Transducer like proteins (Tlps). Ligands binding to Tlps relay a signal to chemotaxis proteins in the cytoplasm which initiate a signal transduction cascade, culminating into a directional flagellar movement...
January 12, 2017: Gut Microbes
https://www.readbyqxmd.com/read/28080049/modeling-diversity-in-structures-of-bacterial-outer-membrane-lipids
#3
Huilin Ma, Daniel D Cummins, Natalie Brooke Edelstein, Jerry Gomez, Aliza Khan, Masud Dikita Llewellyn, Tara Picudella, Sarah Rose Willsey, Shikha Nangia
Lipopolysaccharides are vital components of the outer membrane of gram-negative bacteria, and they act as extremely strong stimulators of innate immunity in diverse eukaryotic species. The primary immunostimulatory center of the LPS molecule is lipid A-a disaccharide-bound lipophilic domain. Considering the broad diversity in bacterial species, there are variations in the lipid A structure and their immunogenic potency. In this work, we model the lipid A structures of eight commensal or human pathogenic bacterial species: Helicobacter pylori, Porphyromonas gingivalis, Bacteroides fragilis, Bordetella pertussis, Chlamydia trachomatis, Campylobacter jejuni, Neisseria meningitidis, and Salmonella minnesota...
January 12, 2017: Journal of Chemical Theory and Computation
https://www.readbyqxmd.com/read/28056838/first-case-report-of-myopericarditis-linked-to-campylobacter-coli-enterocolitis
#4
Cameron R M Moffatt, Soniah B Moloi, Karina J Kennedy
BACKGROUND: Campylobacter spp. are a common cause of mostly self-limiting enterocolitis. Although rare, pericarditis and myopericarditis have been increasingly documented as complications following campylobacteriosis. Such cases have occurred predominantly in younger males, and involved a single causative species, namely Campylobacter jejuni. We report the first case of myopericarditis following Campylobacter coli enterocolitis, with illness occurring in an immunocompetent middle-aged female...
January 5, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28035601/epidemiological-relationships-of-campylobacter-jejuni-strains-isolated-from-humans-and-chickens-in-south-korea
#5
Jae-Young Oh, Yong-Kuk Kwon, Bai Wei, Hyung-Kwan Jang, Suk-Kyung Lim, Cheon-Hyeon Kim, Suk-Chan Jung, Min-Su Kang
Thirty-nine human isolates of Campylobacter jejuni obtained from a national university hospital during 2007-2010 and 38 chicken isolates of C. jejuni were collected from poultry farms during 2009-2010 in South Korea were used in this study. Campylobacter genomic species and virulence-associated genes were identified by PCR. Pulsed-field gel electrophoresis (PFGE) and multilocus sequence typing (MLST) were performed to compare their genetic relationships. All isolates were highly resistant to ciprofloxacin, nalidixic acid, and tetracycline...
January 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/28028852/structural-investigation-on-wlarg-from-campylobacter-jejuni-a-sugar-aminotransferase
#6
Garrett T Dow, Michel Gilbert, James B Thoden, Hazel M Holden
Campylobacter jejuni is a Gram-negative bacterium that represents a leading cause of human gastroenteritis worldwide. Of particular concern is the link between C. jejuni infections and the subsequent development of Guillain-Barré syndrome, an acquired autoimmune disorder leading to paralysis. All Gram-negative bacteria contain complex glycoconjugates anchored to their outer membranes, but in most strains of C. jejuni, this lipoglycan lacks the O-antigen repeating units. Recent mass spectrometry analyses indicate that the C...
December 28, 2016: Protein Science: a Publication of the Protein Society
https://www.readbyqxmd.com/read/28025556/detection-of-campylobacter-jejuni-in-lizard-faeces-from-central-australia-using-quantitative-pcr
#7
Harriet Whiley, Ryan McLean, Kirstin Ross
Worldwide, Campylobacter is a significant cause of gastrointestinal illness. It is predominately considered a foodborne pathogen, with human exposure via non-food transmission routes generally overlooked. Current literature has been exploring environmental reservoirs of campylobacteriosis including potential wildlife reservoirs. Given the close proximity between lizards and human habitats in Central Australia, this study examined the presence of Campylobacter jejuni from lizard faeces collected from this region...
December 23, 2016: Pathogens
https://www.readbyqxmd.com/read/28019693/relaxation-of-dna-supercoiling-leads-to-increased-invasion-of-epithelial-cells-and-protein-secretion-by-campylobacter-jejuni
#8
Eoin Scanlan, Laura Ardill, Matthew V X Whelan, Claire Shortt, Jarlath E Nally, Billy Bourke, Tadhg Ó Cróinín
Invasion of intestinal epithelial cells by Campylobacter jejuni is a critical step during infection of the intestine by this important human pathogen. In this study we investigated the role played by DNA supercoiling in the regulation of invasion of epithelial cells and the mechanism by which this could be mediated. A significant correlation between more relaxed DNA supercoiling and an increased ability of C. jejuni strains to penetrate human epithelial cells was demonstrated. Directly inducing relaxation of DNA supercoiling in C...
December 26, 2016: Molecular Microbiology
https://www.readbyqxmd.com/read/28008711/a-proteomics-assay-to-detect-eight-cbrn-relevant-toxins-in-food
#9
Benoit Gilquin, Michel Jaquinod, Mathilde Louwagie, Sylvie Kieffer-Jaquinod, Alexandra Kraut, Myriam Ferro, François Becher, Virginie Brun
A proteomics assay was set up to analyze food substrates for eight toxins of the CBRN (chemical, biological, radiological and nuclear) threat, namely ricin, Clostridium perfringens epsilon toxin (ETX), Staphylococcus aureus enterotoxins (SEA, SEB and SED), shigatoxins from Shigella dysenteriae and entero-hemorragic Escherichia coli strains (STX1 and STX2) and Campylobacter jejuni cytolethal distending toxin (CDT). The assay developed was based on an antibody-free sample preparation followed by bottom-up LC-MS/MS analysis operated in targeted mode...
November 7, 2016: Proteomics
https://www.readbyqxmd.com/read/28008697/host-cell-binding-of-the-flagellar-tip-protein-of-campylobacter-jejuni
#10
Claudia M Freitag, Karin Strijbis, Jos P M van Putten
Flagella are nanofibers that drive bacterial movement. The filaments are generally composed of thousands of tightly packed flagellin subunits with a terminal cap protein, named FliD. Here we report that the FliD protein of the bacterial pathogen Campylobacter jejuni binds to host cells. Live-cell imaging and confocal microscopy showed initial contact of the bacteria with epithelial cells via the flagella tip. Recombinant FliD protein bound to the surface of intestinal epithelial cells in a dose-dependent fashion...
December 22, 2016: Cellular Microbiology
https://www.readbyqxmd.com/read/27986835/tannerella-forsythia-strains-display-different-cell-surface-nonulosonic-acids-biosynthetic-pathway-characterization-and-first-insight-into-biological-implications
#11
Valentin Friedrich, Bettina Janesch, Markus Windwarder, Daniel Maresch, Matthias L Braun, Zoë A Megson, Evgeny Vinogradov, Marie-France Goneau, Ashu Sharma, Friedrich Altmann, Paul Messner, Ian C Schoenhofen, Christina Schäffer
Tannerella forsythia is an anaerobic, Gram-negative periodontal pathogen. A unique O-linked oligosaccharide decorates the bacterium's cell surface proteins and was shown to modulate the host immune response. In our study, we investigated the biosynthesis of the nonulosonic acid (NulO) present at the terminal position of this glycan. A bioinformatic analysis of T. forsythia genomes revealed a gene locus for the synthesis of pseudaminic acid (Pse) in the type strain ATCC 43037 while strains FDC 92A2 and UB4 possess a locus for the synthesis of legionaminic acid (Leg) instead...
December 16, 2016: Glycobiology
https://www.readbyqxmd.com/read/27977299/feed-can-be-a-source-of-campylobacter-jejuni-infection-in-broilers
#12
M B R Alves, B B Fonseca, R T Melo, E P Mendonça, P C Nalevaiko, L C Girão, G P Monteiro, P L Silva, D A Rossi
1. The aim was to determine the importance of a contaminated diet as a possible cause of Campylobacter jejuni infection in broilers. 2. This study evaluated the viability of C. jejuni in both starter and finisher diets and the interference from other mesophilic bacteria in this viability. 3. Starter and finisher samples of broiler diet were deliberately contaminated with 3 or 5 log CFU·g(-1) of C. jejuni (NCTC 11351) and then maintained at two different storage temperatures (25°C or 37°C) for 3 or 5 d. 4...
December 15, 2016: British Poultry Science
https://www.readbyqxmd.com/read/27965649/the-12-gastrointestinal-pathogens-spectrum-of-acute-infectious-diarrhea-in-a-sentinel-hospital-shenzhen-china
#13
Hongwei Shen, Jinjin Zhang, Yinghui Li, Sirou Xie, Yixiang Jiang, Yanjie Wu, Yuhui Ye, Hong Yang, Haolian Mo, Chaoman Situ, Qinghua Hu
Acute infectious gastroenteritis is one of the most common diseases among all ages, particularly in developing countries. The pathogen spectrum may differ among different regions and seasons. To investigate the etiology of acute diarrhea in Shenzhen, a prospective study was conducted from August 2014 to September 2015. Stools from 412 patients with diarrhea (286 of whom were adults) including the general epidemiological information of the patients were collected. The 19 pathogens were detected by conventional culture method or multiplex PCR assay, which included five viruses (rotavirus, adenovirus, sapovirus, norovirus, and astrovirus), 11 bacterial pathogens (Salmonella, Campylobacter jejuni, Shigella, Listeria monocytogenes, Vibrio parahaemolyticus, Vibrio cholera, Enterohemorrhagic (EHEC), enteropathogenic (EPEC), enteroinvasive (EIEC), enterotoxigenic (ETEC); and enteroaggregative Escherichia coli (EAEC)) and three parasites (Entamoeba histolytica, Giardia lamblia, and Cryptosporidium parvum)...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27965643/the-minor-flagellin-of-campylobacter-jejuni-flab-confers-defensive-properties-against-bacteriophage-infection
#14
Lukas Lis, Ian F Connerton
A screen of bacteriophages infecting a panel of Campylobacter jejuni PT14 gene knock-out mutants identified a role for the minor flagellin encoded by the flaB gene, in the defense of the host against CP8unalikevirus bacteriophage CP_F1 infection. Inactivation of the flaB gene resulted in an increase in the susceptibility of PT14 cultures to infection by CP_F1 and an increase in bacteriophage yields. Infection of wild type PT14 with CP_F1 produces turbid plaques in bacterial lawns, from which 78% of the resistant isolates recovered exhibit either attenuation or complete loss of motility...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27942359/cytolethal-distending-toxin-from-campylobacter-jejuni-requires-the-cytoskeleton-for-toxic-activity
#15
Estela T Méndez-Olvera, Jaime A Bustos-Martínez, Yolanda López-Vidal, Antonio Verdugo-Rodríguez, Daniel Martínez-Gómez
BACKGROUND: Campylobacter jejuni is one of the major causes of infectious diarrhea worldwide. The distending cytolethal toxin (CDT) of Campylobacter spp. interferes with normal cell cycle progression. This toxic effect is considered a result of DNase activity that produces chromosomal DNA damage. To perform this event, the toxin must be endocytosed and translocated to the nucleus. OBJECTIVES: The aim of this study was to evaluate the role of the cytoskeleton in the translocation of CDT to the nucleus...
October 2016: Jundishapur Journal of Microbiology
https://www.readbyqxmd.com/read/27939129/guillain-barr%C3%A3-syndrome-is-induced-in-non-obese-diabetic-nod-mice-following-campylobacter-jejuni-infection-and-is-exacerbated-by-antibiotics
#16
J L St Charles, J A Bell, B J Gadsden, A Malik, H Cooke, L K Van de Grift, H Y Kim, E J Smith, L S Mansfield
Campylobacter jejuni is a leading cause of bacterial gastroenteritis linked to several serious autoimmune sequelae such as the peripheral neuropathies Guillain Barré syndrome (GBS) and Miller Fisher syndrome (MFS). We hypothesized that GBS and MFS can result in NOD wild type (WT) mice or their congenic interleukin (IL)-10 or B7-2 knockouts secondary to C. jejuni infection. Mice were gavaged orally with C. jejuni strains HB93-13 and 260.94 from patients with GBS or CF93-6 from a patient with MFS and assessed for clinical neurological signs and phenotypes, anti-ganglioside antibodies, and cellular infiltrates and lesions in gut and peripheral nerve tissues...
December 8, 2016: Journal of Autoimmunity
https://www.readbyqxmd.com/read/27935836/the-pas-domain-containing-protein-heur-regulates-heme-uptake-in-campylobacter-jejuni
#17
Jeremiah G Johnson, Jennifer A Gaddy, Victor J DiRita
Campylobacter jejuni is a leading cause of bacterially derived gastroenteritis. A previous mutant screen demonstrated that the heme uptake system (Chu) is required for full colonization of the chicken gastrointestinal tract. Subsequent work identified a PAS domain-containing regulator, termed HeuR, as being required for chicken colonization. Here we confirm that both the heme uptake system and HeuR are required for full chicken gastrointestinal tract colonization, with the heuR mutant being particularly affected during competition with wild-type C...
November 15, 2016: MBio
https://www.readbyqxmd.com/read/27932636/complete-genome-sequence-of-bacteriophage-ma12-which-infects-both-campylobacter-jejuni-and-salmonella-enterica-serovar-enteritidis
#18
Sunjin Lee, Taesoo Kwon, Su-Jin Chae, Jong-Hyun Kim, Yeon Ho Kang, Gyung Tae Chung, Dae-Won Kim, Deog-Yong Lee
Here, we announce the complete genome sequence of Salmonella enterica serovar Enteritidis (S Enteritidis) bacteriophage MA12, a 41-Kb chromosome. The strain can infect both Campylobacter jejuni (C. jejuni) and S Enteritidis and can be used in phage therapy experiments with poultry and poultry meat.
December 8, 2016: Genome Announcements
https://www.readbyqxmd.com/read/27931258/htra-mediated-e-cadherin-cleavage-is-limited-to-degp-and-degq-homologs-expressed-by-gram-negative-pathogens
#19
Carmen M Abfalter, Maria Schubert, Camilla Götz, Thomas P Schmidt, Gernot Posselt, Silja Wessler
BACKGROUND: The serine proteases HtrA/DegP secreted by the human gastrointestinal pathogens Helicobacter pylori (H. pylori) and Campylobacter jejuni (C. jejuni) cleave the mammalian cell adhesion protein E-cadherin to open intercellular adhesions. A wide range of bacteria also expresses the HtrA/DegP homologs DegQ and/or DegS, which significantly differ in structure and function. METHODS: E-cadherin shedding was investigated in infection experiments with the Gram-negative pathogens H...
December 8, 2016: Cell Communication and Signaling: CCS
https://www.readbyqxmd.com/read/27921008/age-related-differences-in-the-luminal-and-mucosa-associated-gut-microbiome-of-broiler-chickens-and-shifts-associated-with-campylobacter-jejuni-infection
#20
Wageha A Awad, Evelyne Mann, Monika Dzieciol, Claudia Hess, Stephan Schmitz-Esser, Martin Wagner, Michael Hess
Despite the importance of gut microbiota for broiler performance and health little is known about the composition of this ecosystem, its development and response towards bacterial infections. Therefore, the current study was conducted to address the composition and structure of the microbial community in broiler chickens in a longitudinal study from day 1 to day 28 of age in the gut content and on the mucosa. Additionally, the consequences of a Campylobacter (C.) jejuni infection on the microbial community were assessed...
2016: Frontiers in Cellular and Infection Microbiology
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