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Campylobacter jejuni

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https://www.readbyqxmd.com/read/28546493/whole-genome-sequence-of-the-bacteriophage-sensitive-strain-campylobacter-jejuni-nctc12662
#1
Yilmaz Emre Gencay, Martine C H Sørensen, Lone Brøndsted
Campylobacter jejuni NCTC12662 has been the choice bacteriophage isolation strain due to its susceptibility to C. jejuni bacteriophages. This trait makes it a good candidate for studying bacteriophage-host interactions. We report here the whole-genome sequence of NCTC12662, allowing future elucidation of the molecular mechanisms of phage-host interactions in C. jejuni.
May 25, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28542173/metabolic-and-fitness-determinants-for-in-vitro-growth-and-intestinal-colonization-of-the-bacterial-pathogen-campylobacter-jejuni
#2
Beile Gao, Hanne Vorwerk, Claudia Huber, Maria Lara-Tejero, Juliane Mohr, Andrew L Goodman, Wolfgang Eisenreich, Jorge E Galán, Dirk Hofreuter
Campylobacter jejuni is one of the leading infectious causes of food-borne illness around the world. Its ability to persistently colonize the intestinal tract of a broad range of hosts, including food-producing animals, is central to its epidemiology since most infections are due to the consumption of contaminated food products. Using a highly saturated transposon insertion library combined with next-generation sequencing and a mouse model of infection, we have carried out a comprehensive genome-wide analysis of the fitness determinants for growth in vitro and in vivo of a highly pathogenic strain of C...
May 2017: PLoS Biology
https://www.readbyqxmd.com/read/28536568/comparing-the-genetic-diversity-and-antimicrobial-resistance-profiles-of-campylobacter-jejuni-recovered-from-cattle-and-humans
#3
Wonhee Cha, Rebekah E Mosci, Samantha L Wengert, Cristina Venegas Vargas, Steven R Rust, Paul C Bartlett, Daniel L Grooms, Shannon D Manning
Campylobacter jejuni, a leading cause of gastroenteritis in humans, is a foodborne pathogen that can reside in chickens, pigs, and cattle. Because resistance to fluoroquinolones and macrolides, which are commonly used to treat human infections, has emerged in C. jejuni, it is imperative to continously monitor resistance patterns and examine the genetic variation in strains from human infections and animal reservoirs. Our previous study of C. jejuni from human campylobacteriosis cases showed a significantly higher rate of tetracycline resistance compared to national trends, and identified multilocus sequence type (ST)-982 and a history of cattle contact to be associated with tetracycline resistance...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28532801/dissemination-of-erm-b-and-its-associated-multidrug-resistance-genomic-islands-in-campylobacter-from-2013-to-2015
#4
Dejun Liu, Fengru Deng, Yanan Gao, Hong Yao, Zhangqi Shen, Congming Wu, Yang Wang, Jianzhong Shen
A total of 1372 Campylobacter isolates (1107 Campylobacter coli and 265 Campylobacter jejuni) were obtained from 3462 samples collected from slaughterhouses and farms in three representative regions of China (Shandong, Guangdong, and Shanghai) over three successive years (2013-2015). Of these, 84 (84/1372, 6.1%) were erm(B)-positive, and all 84 positive isolates were identified as C. coli (83 chicken isolates and one swine isolate). The prevalence of erm(B) in Campylobacter isolates was compared amongst the different regions and between the three years investigated...
May 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28526589/a-rapid-salmonella-detection-method-involving-thermophilic-helicase-dependent-amplification-and-a-lateral-flow-assay
#5
Xin-Jun Du, Tian-Jiao Zhou, Ping Li, Shuo Wang
Salmonella is a major foodborne pathogen that is widespread in the environment and can cause serious human and animal disease. Since conventional culture methods to detect Salmonella are time-consuming and laborious, rapid and accurate techniques to detect this pathogen are critically important for food safety and diagnosing foodborne illness. In this study, we developed a rapid, simple and portable Salmonella detection strategy that combines thermophilic helicase-dependent amplification (tHDA) with a lateral flow assay to provide a detection result based on visual signals within 90 min...
May 16, 2017: Molecular and Cellular Probes
https://www.readbyqxmd.com/read/28523231/association-of-anti-gangliosides-antibodies-and-anti-cmv-antibodies-in-guillain-barr%C3%A3-syndrome
#6
Lijuan Wang, Chunqing Shao, Chunjiao Yang, Xixiong Kang, Guojun Zhang
INTRODUCTION: Numerous types of infection were closely related to GBS, mainly including Campylobacter jejuni, Cytomegalovirus, which may lead to the production of anti-gangliosides antibodies (AGA). Currently, although there are increased studies on the AGA and a few studies of anti-CMV antibodies in GBS, the association between them remains poorly documented. Therefore, our research aims to analyze the correlation of anti-CMV antibodies and AGA in GBS. METHODS: A total of 29 patients with GBS were enrolled in this study...
May 2017: Brain and Behavior
https://www.readbyqxmd.com/read/28522817/lactobacillus-johnsonii-ameliorates-intestinal-extra-intestinal-and-systemic-pro-inflammatory-immune-responses-following-murine-campylobacter-jejuni-infection
#7
Stefan Bereswill, Ira Ekmekciu, Ulrike Escher, Ulrike Fiebiger, Kerstin Stingl, Markus M Heimesaat
Campylobacter jejuni infections are progressively increasing worldwide. Probiotic treatment might open novel therapeutic or even prophylactic approaches to combat campylobacteriosis. In the present study secondary abiotic mice were generated by broad-spectrum antibiotic treatment and perorally reassociated with a commensal murine Lactobacillus johnsonii strain either 14 days before (i.e. prophylactic regimen) or 7 days after (i.e. therapeutic regimen) peroral C. jejuni strain 81-176 infection. Following peroral reassociation both C...
May 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28507984/immunoprevalence-to-six-waterborne-pathogens-in-beachgoers-at-boquer%C3%A3-n-beach-puerto-rico-application-of-a-microsphere-based-salivary-antibody-multiplex-immunoassay
#8
Swinburne A J Augustine, Kaneatra J Simmons, Tarsha N Eason, Clarissa L Curioso, Shannon M Griffin, Timothy J Wade, Alfred Dufour, G Shay Fout, Ann C Grimm, Kevin H Oshima, Elizabeth A Sams, Mary Jean See, Larry J Wymer
Waterborne infectious diseases are a major public health concern worldwide. Few methods have been established that are capable of measuring human exposure to multiple waterborne pathogens simultaneously using non-invasive samples such as saliva. Most current methods measure exposure to only one pathogen at a time, require large volumes of individual samples collected using invasive procedures, and are very labor intensive. In this article, we applied a multiplex bead-based immunoassay capable of measuring IgG antibody responses to six waterborne pathogens simultaneously in human saliva to estimate immunoprevalence in beachgoers at Boquerón Beach, Puerto Rico...
2017: Frontiers in Public Health
https://www.readbyqxmd.com/read/28505584/development-of-a-gold-nanoparticle-based-universal-oligonucleotide-microarray-for-multiplex-and-low-cost-detection-of-foodborne-pathogens
#9
Xiaoqiang Wang, Sisi Ying, Xiaoguang Wei, Jun Yuan
Bacterial foodborne diseases remain major threats to food safety and public health, especially in developing countries. In this study a novel assay, combining gold nanoparticle (GNP)-based multiplex oligonucleotide ligation-PCR and universal oligonucleotide microarray technology, was developed for inexpensive, specific, sensitive, and multiplex detection of eight common foodborne pathogens, including Shigella spp., Campylobacter jejuni, Bacillus cereus, Escherichia coli O157:H7, Listeria monocytogenes, Salmonella enterica, Staphylococcus aureus, and Vibrio parahaemolyticus...
May 9, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/28504616/prevalence-and-characterization-of-campylobacter-jejuni-isolated-from-retail-chicken-in-tianjin-china
#10
Hui Ma, Yulan Su, Luyao Ma, Lina Ma, Ping Li, Xinjun Du, Greta Gölz, Shuo Wang, Xiaonan Lu
Campylobacter jejuni is an important foodborne pathogen worldwide; however, there is a lack of information on the prevalence and antibiotic-resistant profile of C. jejuni in the People's Republic of China. We determined the prevalence and characteristics of C. jejuni on the retail level in Tianjin, one of the five national central cities in China. A total of 227 samples of chicken wings, legs, and breasts were collected from supermarkets and wet markets; 42 of these samples were confirmed to be positive for Campylobacter contamination...
May 15, 2017: Journal of Food Protection
https://www.readbyqxmd.com/read/28503965/prevalence-of-campylobacter-species-in-wild-birds-of-south-korea
#11
Yong-Kuk Kwon, Jae-Young Oh, Ok-Mi Jeong, Oun-Kyoung Moon, Min-Su Kang, Byeong-Yeal Jung, Byung-Ki An, So-Youn Youn, Hye-Ryoung Kim, Il Jang, Hee-Soo Lee
Campylobacter species cause human gastrointestinal infections worldwide. They commonly inhabit intestines of avian species including wild birds. They might play a role in the spread of infections to humans and other bird species. The prevalence of Campylobacter species in 2164 faecal samples of wild birds (representing 71 species and 28 families) captured across the Korean peninsula was evaluated in this study. The overall prevalence was 15.3% (332/2164). Bird species belonging to the family Charadriidae had the highest isolation rate (30...
May 15, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28500040/a-novel-sampling-method-for-assessing-human-pathogen-interactions-in-the-natural-environment-using-boot-socks-and-citizen-scientists-with-an-application-to-the-seasonality-of-campylobacter
#12
Natalia R Jones, Caroline Millman, Mike van der Es, Miroslava Hukelova, Ken J Forbes, Catherine Glover, Sam Haldenby, Paul R Hunter, Kathryn Jackson, Sarah J O'Brien, Dan Rigby, Norval J C Strachan, Nicola Williams, Iain R Lake
This paper introduces a novel method for sampling pathogens in natural environments. It uses fabric boot socks worn over walkers' shoes allowing collection of composite samples over large areas. Wide area sampling is better suited to studies focussing upon human exposure to pathogens (e.g. recreational walking). This sampling method is implemented using a Citizen Science approach: groups of three walkers wearing boot socks undertook one of six routes, 40 times over 16 months in the North West (NW) and East Anglian (EA) regions of England...
May 12, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28499399/identification-of-potential-campylobacter-jejuni-genes-involved-in-biofilm-formation-by-ez-tn5-transposome-mutagenesis
#13
Amy Huei Teen Teh, Sui Mae Lee, Gary A Dykes
BACKGROUND: Biofilm formation has been suggested to play a role in the survival of Campylobacter jejuni in the environment and contribute to the high incidence of human campylobacteriosis. Molecular studies of biofilm formation by Campylobacter are sparse. RESULTS: We attempted to identify genes that may be involved in biofilm formation in seven C. jejuni strains through construction of mutants using the EZ-Tn5 Transposome system. Only 14 mutants with reduced biofilm formation were obtained, all from one strain of C...
May 12, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28491823/comparative-proteomics-reveals-differences-in-host-pathogen-interaction-between-infectious-and-commensal-relationship-with-campylobacter-jejuni
#14
Nieves Ayllón, Ángeles Jiménez-Marín, Héctor Argüello, Sara Zaldívar-López, Margarita Villar, Carmen Aguilar, Angela Moreno, José De La Fuente, Juan J Garrido
Campylobacter jejuni is the leading food-borne poisoning in industrialized countries. While the bacteria causes disease in humans, it merely colonizes the gut in poultry or pigs, where seems to establish a commensal relationship. Until now, few studies have been conducted to elucidate the relationship between C. jejuni and its different hosts. In this work, a comparative proteomics approach was used to identify the underlying mechanisms involved in the divergent outcome following C. jejuni infection in human and porcine host...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28487689/cj0440c-affects-flagella-formation-and-in-vivo-colonization-of-erythromycin-susceptible-and-resistant-campylobacter-jejuni
#15
Haihong Hao, Xia Fang, Jing Han, Steven L Foley, Yulian Wang, Guyue Cheng, Xu Wang, Lingli Huang, Menghong Dai, Zhenli Liu, Zonghui Yuan
Campylobacter jejuni is one of the most common foodborne pathogen worldwide. A putative transcriptional regulator, Cj0440c, was up-regulated in the erythromycin-resistant C. jejuni, however, the precise role of Cj0440c is yet to be determined. The aim of this study was to determine the biological functions of Cj0440c. The Cj0440c isogenic mutants were constructed from erythromycin-susceptible C. jejuni NCTC 11168 (S) and -resistant C. jejuni 68-ER (R), designating as SM and RM, respectively. The isogenic Cj0440c mutants (SM and RM) and parental strains (S and R) were subjected to microarray and qRT-PCR analysis to examine the transcriptional profile changes contributed by Cj0440c...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28487683/trans-cinnamaldehyde-carvacrol-and-eugenol-reduce-campylobacter-jejuni-colonization-factors-and-expression-of-virulence-genes-in-vitro
#16
Abhinav Upadhyay, Komala Arsi, Basanta R Wagle, Indu Upadhyaya, Sandip Shrestha, Ann M Donoghue, Dan J Donoghue
Campylobacter jejuni is a major foodborne pathogen that causes severe gastroenteritis in humans characterized by fever, diarrhea, and abdominal cramps. In the human gut, Campylobacter adheres and invades the intestinal epithelium followed by cytolethal distending toxin mediated cell death, and enteritis. Reducing the attachment and invasion of Campylobacter to intestinal epithelium and expression of its virulence factors such as motility and cytolethal distending toxin (CDT) production could potentially reduce infection in humans...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28487428/microbiota-derived-short-chain-fatty-acids-modulate-expression-of-campylobacter-jejuni-determinants-required-for-commensalism-and-virulence
#17
Paul M Luethy, Steven Huynh, Deborah A Ribardo, Sebastian E Winter, Craig T Parker, David R Hendrixson
Campylobacter jejuni promotes commensalism in the intestinal tracts of avian hosts and diarrheal disease in humans, yet components of intestinal environments recognized as spatial cues specific for different intestinal regions by the bacterium to initiate interactions in either host are mostly unknown. By analyzing a C. jejuni acetogenesis mutant defective in converting acetyl coenzyme A (Ac-CoA) to acetate and commensal colonization of young chicks, we discovered evidence for in vivo microbiota-derived short-chain fatty acids (SCFAs) and organic acids as cues recognized by C...
May 9, 2017: MBio
https://www.readbyqxmd.com/read/28471617/causality-assessment-of-serious-neurologic-adverse-events-following-bopv-national-vaccination-campaign-in-israel
#18
Diana Tasher, Eran Kopel, Emilia Anis, Zachi Grossman, Eli Somekh
BACKGROUND: During 2013-2014 Israel experienced a continuous circulation of wild poliovirus type 1 (WPV1) but with no clinical cases. WPV1 circulation was gradually terminated following a national vaccination campaign of bivalent oral poliovirus vaccine (bOPV) for 943,587 children < 10 years. Four cases of children with neurological manifestations that appeared following bOPV vaccinations were reported during the campaign: three of Guillain-Barré syndrome (GBS) and one of acute disseminated encephalomyelitis (ADEM)...
October 2016: Israel Medical Association Journal: IMAJ
https://www.readbyqxmd.com/read/28470609/generation-of-recombinant-n-linked-glycoproteins-in-e-coli
#19
Benjamin Strutton, Stephen R P Jaffé, Jagroop Pandhal, Phillip C Wright
The production of N-linked recombinant glycoproteins is possible in a variety of biotechnology host cells, and more recently in the bacterial workhorse, Escherichia coli. This methods chapter will outline the components and procedures needed to produce N-linked glycoproteins in E. coli, utilizing Campylobacter jejuni glycosylation machinery, although other related genes can be used with minimal tweaks to this methodology. To ensure a successful outcome, various methods will be highlighted that can confirm glycoprotein production to a high degree of confidence, including the gold standard of mass spectrometry analysis...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28468859/isolation-of-campylobacter-species-from-stool-samples-using-a-filtration-method-assessment-from-a-u-s-based-population
#20
Irving Nachamkin, Phi Nguyen
Fecal samples submitted to our clinical microbiology laboratory from patients in the Philadelphia region were prospectively analyzed for Campylobacter species other than C. jejuni and C. coli using a filtration method and microaerobic conditions with increased H2 concentrations. Of 225 samples tested, 13 (5.8%) yielded Campylobacter species with frequent isolation of C. concisus. The majority of Campylobacter species were not clinically significant. Additional studies in U.S. populations are warranted.
May 3, 2017: Journal of Clinical Microbiology
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