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Campylobacter jejuni

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https://www.readbyqxmd.com/read/28939610/co-administration-of-the-campylobacter-jejuni-n-glycan-based-vaccine-with-probiotics-improves-vaccine-performance-in-broiler-chickens
#1
H Nothaft, M E Perez-Muñoz, G J Gouveia, R M Duar, J J Wanford, L Lango-Scholey, C G Panagos, V Srithayakumar, G S Plastow, C Coros, C D Bayliss, A S Edison, J Walter, C M Szymanski
Source attribution studies report that consumption of contaminated poultry is the primary source for acquiring human campylobacteriosis. Oral administration of an engineered Escherichia coli strain expressing the Campylobacter jejuni N-glycan reduces bacterial colonization in specific-pathogen-free leghorn chickens, but only a fraction of birds respond to vaccination. Optimizing the vaccine for commercial broiler chickens has great potential to prevent pathogen entry into the food chain. Here, we tested the same vaccination approach in broilers and observed similar efficacy in pathogen load reduction, stimulation of host IgY response, lack of C...
September 22, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28935738/complete-genome-sequence-of-campylobacter-jejuni-rm1246-errc-which-exhibits-resistance-to-quaternary-ammonium-compounds
#2
Nereus W Gunther, Erin R Reichenberger
Campylobacter jejuni strain RM1246-ERRC is a clinical isolate. In laboratory experiments, RM1246-ERRC exhibited greater resistance to the antimicrobial effects of quaternary ammonium compounds than other C. jejuni strains. The chromosome of RM1246-ERRC is 1,659,694 bp with a G+C content of 30.56%. The strain also possesses a 45,197-bp plasmid.
September 21, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28922740/a-conserved-dggk-motif-is-essential-for-the-function-of-the-pglb-oligosaccharyltransferase-from-campylobacter-jejuni
#3
Yasmin Barre, Harald Nothaft, Cody Thomas, Xin Liu, Jianjun Li, Kenneth K S Ng, Christine M Szymanski
In Campylobacter jejuni, the PglB oligosaccharyltransferase catalyzes the transfer of a heptasaccharide from a lipid donor to asparagine within the D/E-X1-N-X2-S/T sequon (X1,2 ≠ P) or releases this heptasaccharide as free oligosaccharides (fOS). Using available crystal structures and sequence alignments, we identified a DGGK motif near the active site of PglB that is conserved among all Campylobacter species. We demonstrate that amino acid substitutions in the aspartate and lysine residues result in loss of protein glycosylation in the heterologous Escherichia coli system...
October 1, 2017: Glycobiology
https://www.readbyqxmd.com/read/28916560/cmeabc-multidrug-efflux-pump-contributes-to-antibiotic-resistance-and-promotes-campylobacter-jejuni-survival-and-multiplication-in-acanthamoeba-polyphaga
#4
Ana Vieira, Amritha Ramesh, Alan M Seddon, Andrey V Karlyshev
Campylobacter jejuni is a foodborne pathogen recognized as the leading cause of human bacterial gastroenteritis. The wide use of antibiotics in medicine and in animal husbandry has led to an increased incidence of antibiotic resistance in Campylobacter In addition to a role in multidrug resistance, the Campylobacter CmeABC RND-type efflux pump, which is associated with multidrug resistance (MDR), may also be involved in virulence. As a vehicle of pathogenic microorganisms, the protozoan Acanthamoeba is a good model for the investigation of bacterial survival in the environment and molecular mechanisms of pathogenicity...
September 15, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28916459/variation-in-campylobacter-jejuni-culturability-in-presence-of-acanthamoeba-castellanii-neff
#5
María Reyes-Batlle, Cecilia Girbau, Atteneri López-Arencibia, Ines Sifaoui, Aitor Rizo Liendo, Carlos J Bethencourt Estrella, Ana B García Méndez, Olfa Chiboub, Soumaya Hajaji, Aurora Fernández-Astorga, Basilio Valladares, Enrique Martínez-Carretero, José E Piñero, Jacob Lorenzo-Morales
Free-living amoebae (FLA) are protozoa that are widely distributed in the environment mainly in water and soil related habitats. These amoebae have also been reported to be associated with some bacterial pathogens for humans such as Campylobacter spp. The species C. jejuni is the causative agent of about 90% of human campylobacteriosis cases worldwide and this disease may even end up in severe autoimmune sequelae as Guillain-Barré syndrome (GBS). In this study, the interactions between the strain Acanthamoeba castellanii Neff and Campylobacter jejuni was investigated...
September 12, 2017: Experimental Parasitology
https://www.readbyqxmd.com/read/28916318/matrix-metalloproteinases-2-and-9-in-campylobacter-jejuni-induced-paralytic-neuropathy-resembling-guillain-barr%C3%A3-syndrome-in-chickens
#6
Kishan Kumar Nyati, Kashi Nath Prasad, Vinita Agrawal, Nuzhat Husain
Inflammation in Guillain-Barré syndrome (GBS) is manifested by changes in matrix metalloproteinase (MMP) and pro-inflammatory cytokine expression. We investigated the expression of MMP-2, -9 and TNF-α and correlated it with pathological changes in sciatic nerve tissue from Campylobacter jejuni-induced chicken model for GBS. Campylobacter jejuni and placebo were fed to chickens and assessed for disease symptoms. Sciatic nerves were examined by histopathology and immunohistochemistry. Expressions of MMPs and TNF-α, were determined by real-time PCR, and activities of MMPs by zymography...
September 12, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28906158/prevalence-of-putative-virulence-genes-in-campylobacter-and-arcobacter-species-isolated-from-poultry-and-poultry-by-products-in-tunisia
#7
Hela Jribi, Hanen Sellami, Amal Ben Hassena, Radhouane Gdoura
Campylobacter and Arcobacter spp. are common causes of gastroenteritis in humans; these infections are commonly due to undercooked poultry. However, their virulence mechanism is still poorly understood. The aim of this study was to evaluate the presence of genotypic virulence markers in Campylobacter and Arcobacter species using PCR. The prevalence of virulence and cytolethal distending toxin (CDT) genes was estimated in 71 Campylobacteraceae isolates. PCR was used to detect the presence of virulence genes (iam, cadF, virB1, flaA, cdtA, cdtB, and cdtC) using specific primers for a total of 45 Campylobacter isolates, including 37 C...
September 14, 2017: Journal of Food Protection
https://www.readbyqxmd.com/read/28904565/class-1-integrons-and-plasmid-mediated-multiple-resistance-genes-of-the-campylobacter-species-from-pediatric-patient-of-a-university-hospital-in-taiwan
#8
Yi-Chih Chang, Ni Tien, Jai-Sing Yang, Chi-Cheng Lu, Fuu-Jen Tsai, Tsurng-Juhn Huang, I-Kuan Wang
BACKGROUND: The Campylobacter species usually causes infection between humans and livestock interaction via livestock breeding. The studies of the Campylobacter species thus far in all clinical isolates were to show the many kinds of antibiotic phenomenon that were produced. Their integrons cause the induction of antibiotic resistance between bacterial species in the Campylobacter species. RESULTS: The bacterial strains from the diarrhea of pediatric patient which isolated by China Medical University Hospital storage bank...
2017: Gut Pathogens
https://www.readbyqxmd.com/read/28899453/application-of-maldi-tof-ms-systems-in-the-rapid-identification-of-campylobacter-spp-of-public-health-importance
#9
Ying-Hsin Hsieh, Yun F Wang, Hercules Moura, Nancy Miranda, Steven Simpson, Ramnath Gowrishankar, John Barr, Khalil Kerdahi, Irshad M Sulaiman
Campylobacteriosis is an infectious gastrointestinal disease caused by Campylobacter spp.In most cases, it is either underdiagnosed or underreported due to poor diagnostics and limited databases. Several DNA-based molecular diagnostic techniques, including 16S ribosomal RNA (rRNA) sequence typing, have been widely used in the species identification of Campylobacter. Nevertheless, these assays are time-consuming and require a high quality of bacterial DNA. Matrix-assisted laser desorption ionization (MALDI) time-of-flight (TOF) MS is an emerging diagnostic technology that can provide the rapid identification of microorganisms by using their intact cells without extraction or purification...
September 12, 2017: Journal of AOAC International
https://www.readbyqxmd.com/read/28892295/transcriptome-and-proteome-dynamics-in-chemostat-culture-reveal-how-campylobacter-jejuni-modulates-metabolism-stress-responses-and-virulence-factors-upon-changes-in-oxygen-availability
#10
Edward J Guccione, John J Kendall, Andrew Hitchcock, Nitanshu Garg, Michael A White, Francis Mulholland, Robert K Poole, David J Kelly
Campylobacter jejuni, the most frequent cause of food-borne bacterial gastroenteritis worldwide, is a microaerophile that has to survive high environmental oxygen tensions, adapt to oxygen limitation in the intestine and resist host oxidative attack. Here, oxygen-dependent changes in C. jejuni physiology were studied at constant growth rate using carbon (serine)-limited continuous chemostat cultures. We show that a perceived aerobiosis scale can be calibrated by the acetate excretion flux, which becomes zero when metabolism is fully aerobic (100% aerobiosis)...
September 11, 2017: Environmental Microbiology
https://www.readbyqxmd.com/read/28889054/evaluation-of-chemical-immersion-treatments-to-reduce-microbial-populations-in-fresh-beef
#11
Ahmed Kassem, Joseph Meade, James Gibbons, Kevina McGill, Ciara Walsh, James Lyng, Paul Whyte
The aim of the current study was to assess the ability of a number of chemicals (acetic Acid (AA), citric acid (CA) lactic acid (LA), sodium decanoate (SD) and trisodium phosphate (TSP)) to reduce microbial populations (total viable count, Campylobacter jejuni, Escherichia coli, Salmonella typhimurium and Listeria monocytogenes) on raw beef using an immersion system. The following concentrations of each chemical were used: 3 & 5% for AA, CA, LA, SD and 10 &12% for TSP. Possible synergistic effects of using combinations of two chemicals sequentially (LA+CA and LA+AA) were also investigated...
September 5, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/28887647/a-comparative-evaluation-study-of-growth-conditions-for-culturing-the-isolates-of-campylobacter-spp
#12
Ying-Hsin Hsieh, Steven Simpson, Khalil Kerdahi, Irshad M Sulaiman
Campylobacter is one of the leading causes of foodborne travelers' diarrhea worldwide. Although a large number cases of campylobacteriosis go undiagnosed or unreported, it is considered as the second most common foodborne illness in the USA affecting over 1.3 million individuals every year. Of various Campylobacter species, C. jejuni, C. coli, and C. lari have been accounted for causing more than 99% of human infections. Thus, there is a need to have efficient isolation method to protect public health on food safety and monitoring the burden of campylobacteriosis...
September 8, 2017: Current Microbiology
https://www.readbyqxmd.com/read/28887450/effects-of-low-concentrations-of-erythromycin-penicillin-and-virginiamycin-on-bacterial-resistance-development-in-vitro
#13
Beilei Ge, Kelly J Domesle, Qianru Yang, Shenia R Young, Crystal L Rice-Trujillo, Sonya M Bodeis Jones, Stuart A Gaines, Marla W Keller, Xin Li, Silvia A Piñeiro, Brooke M Whitney, Heather C Harbottle, Jeffrey M Gilbert
Distillers grains are co-products of the corn ethanol industry widely used in animal feed. We examined the effects of erythromycin, penicillin, and virginiamycin at low concentrations reflective of those detected in distillers grains on bacterial resistance selection. At 0.1 µg/ml erythromycin, macrolide-resistant mutants were induced in one Campylobacter coli and one Enterococcus faecium strain, while these strains plus three additional C. coli, one additional E. faecium, and one C. jejuni also developed resistance when exposed to 0...
September 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28885976/quantitative-microbial-risk-assessment-for-spray-irrigation-of-dairy-manure-based-on-an-empirical-fate-and-transport-model
#14
Tucker R Burch, Susan K Spencer, Joel P Stokdyk, Burney A Kieke, Rebecca A Larson, Aaron D Firnstahl, Ana M Rule, Mark A Borchardt
BACKGROUND: Spray irrigation for land-applying livestock manure is increasing in the United States as farms become larger and economies of scale make manure irrigation affordable. Human health risks from exposure to zoonotic pathogens aerosolized during manure irrigation are not well understood. OBJECTIVES: We aimed to a) estimate human health risks due to aerosolized zoonotic pathogens downwind of spray-irrigated dairy manure; and b) determine which factors (e...
August 16, 2017: Environmental Health Perspectives
https://www.readbyqxmd.com/read/28883983/antibiotic-resistance-in-campylobacter-and-other-diarrheal-pathogens-isolated-from-us-military-personnel-deployed-to-thailand-in-2002-2004-a-case-control-study
#15
Carl J Mason, Siriporn Sornsakrin, Jessica C Seidman, Apichai Srijan, Oralak Serichantalergs, Nucharee Thongsen, Michael W Ellis, Viseth Ngauy, Brett E Swierczewski, Ladaporn Bodhidatta
BACKGROUND: Campylobacter continues to be an important cause of diarrheal disease worldwide and a leading cause in Southeast Asia. Studies of US soldiers and marines deployed to Thailand for a 2 to 3 week field exercise provide a unique population in which to study traveler's diarrhea. METHODS: A case-control study of 217 deployed military personnel was conducted from 2002 through 2004. Of these, 155 subjects who presented to a field medical unit with acute diarrhea were enrolled as cases...
2017: Tropical Diseases, Travel Medicine and Vaccines
https://www.readbyqxmd.com/read/28883389/septic-shock-with-multi-organ-failure-due-to-fluoroquinolones-resistant-campylobacter-jejuni
#16
Filippo Mearelli, Chiara Casarsa, Andrea Breglia, Gianni Biolo
BACKGROUND Campylobacter jejuni infections are typically self-limited, and severe extra-intestinal complications are uncommon. CASE REPORT We report a case of a man with septic shock due to fluoroquinolones resistant Campylobacter jejuni. CONCLUSIONS This manuscript emphasizes the potential lethality of fluorquinolones resistant Campylobacter jejuni bacteremia.
September 8, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/28878749/in-vitro-evaluation-of-the-impact-of-the-probiotic-e-coli-nissle-1917-on-campylobacter-jejuni-s-invasion-and-intracellular-survival-in-human-colonic-cells
#17
Yosra A Helmy, Issmat I Kassem, Anand Kumar, Gireesh Rajashekara
Campylobacter jejuni is a leading cause of bacterial food poisoning in humans. Due to the rise in antibiotic-resistant Campylobacter, there exists a need to develop antibiotic-independent interventions to control infections in humans. Here, we evaluated the impact of Escherichia coli Nissle 1917 (EcN), a probiotic strain, on C. jejuni's invasion and intracellular survival in polarized human colonic cells (HT-29). To further understand how EcN mediates its impact, the expression of 84 genes associated with tight junctions and cell adhesion was profiled in HT-29 cells after treatment with EcN and challenge with C...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28872824/transition-state-analysis-of-adenosine-triphosphate-phosphoribosyltransferase
#18
Gert-Jan Moggré, Myles B Poulin, Peter C Tyler, Vern L Schramm, Emily J Parker
Adenosine triphosphate phosphoribosyltransferase (ATP-PRT) catalyzes the first step in histidine biosynthesis, a pathway essential to microorganisms and a validated target for antimicrobial drug design. The ATP-PRT enzyme catalyzes the reversible substitution reaction between phosphoribosyl pyrophosphate and ATP. The enzyme exists in two structurally distinct forms, a short- and a long-form enzyme. These forms share a catalytic core dimer but bear completely different allosteric domains and thus distinct quaternary assemblies...
September 5, 2017: ACS Chemical Biology
https://www.readbyqxmd.com/read/28870004/inverse-correlation-between-extracellular-dnase-activity-and-biofilm-formation-among-chicken-derived-campylobacter-strains
#19
Gi Hoon Jung, Eun Seob Lim, Min-Ah Woo, Joo Young Lee, Joo-Sung Kim, Hyun-Dong Paik
Campylobacter jejuni and C. coli are important foodborne pathogenic bacteria, especially in poultry meat. In this study, the presence of extracellular DNase activity was investigated for biofilm-deficient Campylobacter strains versus biofilm-forming Campylobacter strains isolated from chickens to understand the relation between extracellular DNase activity and biofilm formation. Biofilm-forming reference strain, C. jejuni NCTC11168, was co-incubated with biofilm non-forming strains isolated from raw chickens or their supernatants...
September 5, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28866736/peroxynitrite-scavenging-by-campylobacter-jejuni-truncated-hemoglobin-p
#20
Paolo Ascenzi, Alessandra Pesce
Truncated hemoglobins (trHb) are present in protozoa, cyanobacteria, nemertean, bacteria, algae, and plants. They are characterized by the 2-on-2 topology and are ordered in four phylogenetic groups (I or N, II or O, III or P, and IV or Q). Several functions have been attributed to trHbs including the inactivation of reactive nitrogen and oxygen species, permitting the survival of microorganisms in the host. Here, the kinetics of peroxynitrite scavenging by ferric Campylobacter jejuni truncated hemoglobin P [i...
September 2, 2017: Journal of Biological Inorganic Chemistry: JBIC
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