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Campylobacter jejuni

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https://www.readbyqxmd.com/read/28801089/clinical-and-microbiological-characteristics-of-patients-with-bacteremia-caused-by-campylobacter-species-with-an-emphasis-on-the-subspecies-of-c-fetus
#1
Yen-Hung Liu, Wataru Yamazaki, Yu-Tsung Huang, Chun-Hsing Liao, Wang-Hui Sheng, Po-Ren Hsueh
OBJECTIVES: This study was intended to investigate the clinical and microbiological characteristics of patients with bacteremia caused by Campylobacter species. METHODS: From April 1998 to May 2014, 56 adults with bacteremia caused by Campylobacter species were evaluated. These Campylobacter species isolates were confirmed to the species level using 16S rRNA gene sequencing (all isolates) and multiplex PCR analysis (for C. fetus only). The performance of identification for Campylobacter species by the Bruker Biotyper MALDI-TOF MS was evaluated...
July 25, 2017: Journal of Microbiology, Immunology, and Infection, Wei Mian Yu Gan Ran za Zhi
https://www.readbyqxmd.com/read/28789710/transplanted-human-fecal-microbiota-enhanced-guillain-barr%C3%A3-syndrome-autoantibody-responses-after-campylobacter-jejuni-infection-in-c57bl-6-mice
#2
Phillip T Brooks, Kelsey A Brakel, Julia A Bell, Christopher E Bejcek, Trey Gilpin, Jean M Brudvig, Linda S Mansfield
BACKGROUND: Campylobacter jejuni is the leading antecedent infection to the autoimmune neuropathy Guillain-Barré syndrome (GBS), which is accompanied by an autoimmune anti-ganglioside antibody attack on peripheral nerves. Previously, we showed that contrasting immune responses mediate C. jejuni induced colitis and autoimmunity in interleukin-10 (IL-10)-deficient mice, dependent upon the infecting strain. Strains from colitis patients elicited T helper 1 (TH1)-dependent inflammatory responses while strains from GBS patients elicited TH2-dependent autoantibody production...
August 8, 2017: Microbiome
https://www.readbyqxmd.com/read/28783751/animal-related-factors-associated-with-moderate-to-severe-diarrhea-in-children-younger-than-five-years-in-western-kenya-a-matched-case-control-study
#3
Anne Conan, Ciara E O'Reilly, Eric Ogola, J Benjamin Ochieng, Anna J Blackstock, Richard Omore, Linus Ochieng, Fenny Moke, Michele B Parsons, Lihua Xiao, Dawn Roellig, Tamer H Farag, James P Nataro, Karen L Kotloff, Myron M Levine, Eric D Mintz, Robert F Breiman, Sarah Cleaveland, Darryn L Knobel
BACKGROUND: Diarrheal disease remains among the leading causes of global mortality in children younger than 5 years. Exposure to domestic animals may be a risk factor for diarrheal disease. The objectives of this study were to identify animal-related exposures associated with cases of moderate-to-severe diarrhea (MSD) in children in rural western Kenya, and to identify the major zoonotic enteric pathogens present in domestic animals residing in the homesteads of case and control children...
August 4, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28782648/whole-genome-sequencing-of-campylobacter-jejuni-isolated-from-danish-routine-human-stool-samples-reveals-surprising-degree-of-clustering
#4
K G Joensen, K G Kuhn, L Müller, J T Björkman, M Torpdahl, J Engberg, H M Holt, H L Nielsen, A M Petersen, S Ethelberg, E M Nielsen
OBJECTIVES: Outbreaks of Campylobacter are traditionally considered to be rare, however rather than being the true nature of the disease, this may reflect our present inability to detect them. The aim of this study was to determine the genetic and epidemiological degree of clustering among Campylobacter jejuni isolates from Danish patients. METHODS: Whole-genome sequencing (WGS) was applied to 245 C. jejuni isolates from patients with domestically acquired infection over a 9-month period in 2015 and 2016...
August 3, 2017: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/28769900/intrinsic-and-extrinsic-aspects-on-campylobacter-jejuni-biofilms
#5
Roberta T Melo, Eliane P Mendonça, Guilherme P Monteiro, Mariana C Siqueira, Clara B Pereira, Phelipe A B M Peres, Heriberto Fernandez, Daise A Rossi
Biofilm represents a way of life that allows greater survival of microorganisms in hostile habitats. Campylobacter jejuni is able to form biofilms in vitro and on surfaces at several points in the poultry production chain. Genetic determinants related to their formation are expressed differently between strains and external conditions are decisive in this respect. Our approach combines phylogenetic analysis and the presence of seven specific genes linked to biofilm formation in association with traditional microbiology techniques, using Mueller Hinton and chicken juice as substrates in order to quantify, classify, determine the composition and morphology of the biomass of simple and mixed biofilms of 30 C...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28768141/a-randomized-trial-to-assess-the-effect-of-fluoroquinolone-metaphylaxis-on-the-fecal-prevalence-and-quinolone-susceptibilities-of-salmonella-and-campylobacter-in-feedlot-cattle
#6
Ashley B Smith, David G Renter, Natalia Cernicchiaro, Xiaorong Shi, Jason S Nickell, Daniel J Keil, T G Nagaraja
The study objective was to determine effects of fluoroquinolone metaphylaxis on fecal prevalence of Salmonella and Campylobacter and fecal prevalence of quinolone-resistant Salmonella and Campylobacter in feedlot cattle. On Day 0, cattle (n = 288) at risk for bovine respiratory disease (BRD) were randomly assigned to either a nontreated control pen (12 pens) or a fluoroquinolone-treated (enrofloxacin; Baytril(®) 100) pen (12 pens). Rectal fecal samples were collected from cattle on days 0, 7, 14, 21, and 28...
August 2, 2017: Foodborne Pathogens and Disease
https://www.readbyqxmd.com/read/28766992/lactobacillus-fermentum-3872-as-a-potential-tool-for-combatting-campylobacter-jejuni-infections
#7
B Lehri, A M Seddon, A V Karlyshev
Due to the global spread of multidrug resistant pathogenic bacteria, alternative approaches in combating infectious diseases are required. One such approach is the use of probiotics. Lactobacillus fermentum 3872 is a promising probiotic bacterium producing a range of antimicrobial compounds, such as hydrogen peroxide and lactic acid. In addition, previous studies involving genome sequencing and analysis of L. fermentum 3872 allowed the identification of a gene encoding a cell surface protein referred to as collagen binding protein (CBP) not found in other strains of the species (according to the GenBank database), consisting of a C-terminal cell wall anchor domain (LPXT), multiple repeats of 'B domains' that form stalks presenting an 'A domain' required for adhesion...
August 2, 2017: Virulence
https://www.readbyqxmd.com/read/28766554/campylobacter-jejuni-impairs-sodium-transport-and-epithelial-barrier-function-via-cytokine-release-in-human-colon
#8
R Bücker, S M Krug, V Moos, C Bojarski, M R Schweiger, M Kerick, A Fromm, S Janßen, M Fromm, N A Hering, B Siegmund, T Schneider, C Barmeyer, J D Schulzke
Campylobacter jejuni is the most prevalent cause of foodborne bacterial enteritis worldwide. Patients present with diarrhea and immune responses lead to complications like arthritis and irritable bowel syndrome. Although studies exist in animal and cell models, we aimed at a functional and structural characterization of intestinal dysfunction and the involved regulatory mechanisms in human colon. First, in patients' colonic biopsies, sodium malabsorption was identified as an important diarrheal mechanism resulting from hampered epithelial ion transport via impaired epithelial sodium channel (ENaC) β- and γ-subunit...
August 2, 2017: Mucosal Immunology
https://www.readbyqxmd.com/read/28761097/structures-and-transport-dynamics-of-a-campylobacter-jejuni-multidrug-efflux-pump
#9
Chih-Chia Su, Linxiang Yin, Nitin Kumar, Lei Dai, Abhijith Radhakrishnan, Jani Reddy Bolla, Hsiang-Ting Lei, Tsung-Han Chou, Jared A Delmar, Kanagalaghatta R Rajashankar, Qijing Zhang, Yeon-Kyun Shin, Edward W Yu
Resistance-nodulation-cell division efflux pumps are integral membrane proteins that catalyze the export of substrates across cell membranes. Within the hydrophobe-amphiphile efflux subfamily, these resistance-nodulation-cell division proteins largely form trimeric efflux pumps. The drug efflux process has been proposed to entail a synchronized motion between subunits of the trimer to advance the transport cycle, leading to the extrusion of drug molecules. Here we use X-ray crystallography and single-molecule fluorescence resonance energy transfer imaging to elucidate the structures and functional dynamics of the Campylobacter jejuni CmeB multidrug efflux pump...
August 1, 2017: Nature Communications
https://www.readbyqxmd.com/read/28759328/molecular-dynamics-simulations-of-quinolone-resistance-associated-t86i-and-p104s-mutations-in-campylobacter-jejuni-gyra-unraveling-structural-repercussions
#10
Kusum Mehla, Jayashree Ramana
gyrA is a clinically validated therapeutic drug target that catalyzes changes in DNA topology by introducing negative supercoils into DNA. The broad-spectrum quinolones are hitherto the most potent antibacterial agents targeted toward gyrA. Increasing resistance to quinolones is accompanied by several mutations in the quinolone resistance-determining region of gyrA. In the present study, we report a comprehensive picture of the dynamic behavior of wild-type, T86I, and T86I/P104S mutants (MTs) of gyrA from Campylobacter jejuni in complex with ciprofloxacin to unravel the atomistic details of the mechanism underlying resistance to quinolones...
July 31, 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/28757747/guillain-barr%C3%A3-syndrome-complicating-dengue-fever-two-case-reports
#11
Yang Liang Boo, Mohd Azman M Aris, Pek Woon Chin, Wan Aliaa Wan Sulaiman, Hamidon Basri, Fan Kee Hoo
Guillain-Barré syndrome is a rare neurological manifestation associated with dengue infection. More common antecedent infections include Campylobacter jejuni and Cytomegalovirus infection. Here, we report two cases of Guillain-Barré syndrome complicating dengue infection.
October 2016: Ci Ji Yi Xue za Zhi, Tzu-chi Medical Journal
https://www.readbyqxmd.com/read/28755449/population-structure-and-attribution-of-human-clinical-campylobacter-jejuni-isolates-from-central-europe-to-livestock-and-environmental-sources
#12
J Kovac, B Stessl, N Čadež, I Gruntar, M Cimerman, K Stingl, M Lušicky, M Ocepek, M Wagner, S Smole Možina
Campylobacter jejuni is among the most prevalent causes of human bacterial gastroenteritis worldwide. Domesticated animals and, especially, chicken meat are considered to be the main sources of infections. However, the contribution of surface waters and wildlife in C. jejuni transmission to humans is not well understood. We have evaluated the source attribution potential of a six-gene multiplex PCR (mPCR) method coupled with STRUCTURE analysis on a set of 410 C. jejuni strains isolated from environment, livestock, food and humans in central Europe...
July 28, 2017: Zoonoses and Public Health
https://www.readbyqxmd.com/read/28752962/seabirds-laridae-as-a-source-of-campylobacter-spp-salmonella-spp-and-antimicrobial-resistance-in-south-africa
#13
Elisabet Moré, Teresa Ayats, Peter G Ryan, Preneshni R Naicker, Karen H Keddy, Davide Gaglio, Minke Witteveen, Marta Cerdà-Cuéllar
Zoonotic thermophilic Campylobacter and nontyphoidal Salmonella enterica are a major cause of foodborne human gastroenteritis worldwide. There is little information about reservoirs of these zoonotic agents in Africa. Thus, chicks of kelp gulls (Larus dominicanus, n=129) and greater crested terns (Thalasseus bergii, n=100) were studied at five colonies on the Western Cape coast (South Africa) during summer 2013/2014. Campylobacter spp. occurrence was 14.0% (CI95% : 9.9-19.3), with C. jejuni the most frequently isolated species, whilst that of Salmonella was 27...
July 28, 2017: Environmental Microbiology
https://www.readbyqxmd.com/read/28752081/absence-of-nucleotide-oligomerization-domain-2-is-associated-with-less-distinct-disease-in-campylobacter-jejuni-infected-secondary-abiotic-il-10-deficient-mice
#14
Markus M Heimesaat, Ursula Grundmann, Marie E Alutis, André Fischer, Stefan Bereswill
Human Campylobacter jejuni-infections are progressively increasing worldwide. Despite their high prevalence and socioeconomic impact the underlying mechanisms of pathogen-host-interactions are only incompletely understood. Given that the innate immune receptor nucleotide-oligomerization-domain-2 (Nod2) is involved in clearance of enteropathogens, we here evaluated its role in murine campylobacteriosis. To address this, we applied Nod2-deficient IL-10(-/-) (Nod2(-/-) IL-10(-/-)) mice and IL-10(-/-) counterparts both with a depleted intestinal microbiota to warrant pathogen-induced enterocolitis...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28751407/complete-genome-sequence-of-campylobacter-jejuni-subsp-jejuni-atcc-35925
#15
Susan P Gardner, Kevin J Kendall, Michael E Taveirne, Jonathan W Olson
Here, we report the complete genome sequence of Campylobacter jejuni ATCC 35925, an avian isolate from Sweden. The genome gives insight into the ATCC 35925 strain's remarkable ability to tolerate copper and its permissiveness to plasmid transformation.
July 27, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28741151/probiotic-characteristics-of-lactobacillus-curvatus-dn317-a-strain-isolated-from-chicken-ceca
#16
Mohamed Zommiti, Nathalie Connil, Jeannette Ben Hamida, Mounir Ferchichi
The probiotic characteristics of Lactobacillus curvatus DN317, a strain isolated from chicken ceca, were evaluated. This strain was selected for study from the isolated Lactobacillus strains because it has specific anti-microbial activity against Campylobacter jejuni ATCC 33560, Camp. jejuni NCTC 11168, Listeria monocytogenes ATCC 7644, and Bacillus subtilis ATCC 8633. Lact. curvatus DN317 showed an auto-aggregation percentage of 72% and presented the highest co-aggregation with Lact. monocytogenes ATCC 7644 (68%) compared to B...
July 24, 2017: Probiotics and Antimicrobial Proteins
https://www.readbyqxmd.com/read/28740363/synthesis-and-antimicrobial-activity-of-chiral-quaternary-n-spiro-ammonium-bromides-with-3-4-dihydro-1-h-spiro-isoindoline-2-2-isoquinoline-skeleton
#17
Krzysztof Bielawski, Katarzyna Leszczyńska, Zbigniew Kałuża, Anna Bielawska, Olga Michalak, Tamara Daniluk, Olga Staszewska-Krajewska, Anna Czajkowska, Natalia Pawłowska, Agnieszka Gornowicz
A new class of highly functionalized tetrahydroisoquinolines with a quaternary carbon stereocenter was synthesized starting from an easily accessible L-tartaric acid. Nine strains of bacteria (Staphylococcus aureus, Streptococcus pyogenes, Streptococcus mutans, Streptococcus salivarius, Bacillus subtilis, Enterococcus faecalis, Moraxella catarrhalis, Escherichia coli, Campylobacter jejuni) were used for the determination of minimal inhibitory concentration (MIC) and minimal bactericidal concentration (MBC) of synthesized compounds...
2017: Drug Design, Development and Therapy
https://www.readbyqxmd.com/read/28736979/in-vitro-characteristics-of-lactobacillus-spp-strains-isolated-from-the-chicken-digestive-tract-and-their-role-in-the-inhibition-of-campylobacter-colonization
#18
Patrycja A Kobierecka, Agnieszka K Wyszyńska, Tamara Aleksandrzak-Piekarczyk, Maciej Kuczkowski, Anna Tuzimek, Wioletta Piotrowska, Adrian Górecki, Iwona Adamska, Alina Wieliczko, Jacek Bardowski, Elżbieta K Jagusztyn-Krynicka
Campylobacter jejuni/coli infections are the leading cause of bacterial diarrheal illnesses in humans. Many epidemiological studies indicate that improperly prepared meat from chickens that carry a high load of Campylobacter in their intestinal tracts is the key source of human infections. LAB, mainly members of the Lactococcus and Lactobacillus genera, increasingly have been tested as vehicles for the delivery of heterologous bacterial or viral antigens to animal mucosal immune systems. Thus, the objective of this study was to isolate, identify, and characterize Lactobacillus spp...
July 24, 2017: MicrobiologyOpen
https://www.readbyqxmd.com/read/28717848/new-identification-of-three-or-more-campylobacter-species-on-the-basis-of-a-degenerate-pcr-rflp-method-targeting-gyrb-gene
#19
Hiroyuki Fukuda, Fumiko Kojima, Shuji Fujimoto
This method was aimed targeting more Campylobacter species than conventional PCR-based identifications. They generally use species-specific primers focusing on clinically common species like C. jejuni, resulting in failure to recognize other species. We made the PCR-based identification more flexible using degenerate primers and DdeI- and MboI-separately used RFLP assay, which were designed on the basis of gyrB nucleotide sequence data of 14 Campylobacter species including C. jejuni, C. coli, and C. fetus. Ninety-four clinical isolates from patients with Campylobacter gastroenteritis and 13 biochemically identified C...
July 17, 2017: Current Microbiology
https://www.readbyqxmd.com/read/28714890/cardamom-cumin-and-dill-weed-essential-oils-chemical-compositions-antimicrobial-activities-and-mechanisms-of-action-against-campylobacter-spp
#20
Aysegul Mutlu-Ingok, Funda Karbancioglu-Guler
Natural antimicrobials as well as essential oils (EOs) have gained interest to inhibit pathogenic microorganisms and to control food borne diseases. Campylobacter spp. are one of the most common causative agents of gastroenteritis. In this study, cardamom, cumin, and dill weed EOs were evaluated for their antibacterial activities against Campylobacter jejuni and Campylobacter coli by using agar-well diffusion and broth microdilution methods, along with the mechanisms of antimicrobial action. Chemical compositions of EOs were also tested by gas chromatography (GC) and gas chromatography-mass spectrometry (GC-MS)...
July 15, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
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