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Campylobacter jejuni

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https://www.readbyqxmd.com/read/29330183/campylobacter-jejuni-colonization-in-the-crow-gut-involves-high-deletion-within-the-cytolethal-distending-toxin-gene-cluster
#1
Keya Sen, Jingrang Lu, Piyali Mukherjee, Tanner Berglund, Eunice Varughese, Asish K Mukhopadhyay
Campylobacter spp. are major causes of gastroenteritis worldwide. The virulence potential of Campylobacter shed in crow feces obtained from a roost area in Bothell, Washington, was studied and compared with isolates from other parts of Washington, and from a different crow spp., 7000 miles away, in Kolkata, India. Campylobacter was isolated from 61% and 69 % of the fecal samples obtained from Washington and Kolkata, respectively and were confirmed to be C. jejuni The cytolethal distending toxin (CDT) gene cluster from these isolates revealed a truncated sequence of about 1400 bp...
January 12, 2018: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29324839/wild-insectivorous-bats-might-be-carriers-of-campylobacter-spp
#2
Wilma C Hazeleger, Wilma F Jacobs-Reitsma, Peter H C Lina, Albert G de Boer, Thijs Bosch, Angela H A M van Hoek, Rijkelt R Beumer
BACKGROUND: The transmission cycles of the foodborne pathogens Campylobacter and Salmonella are not fully elucidated. Knowledge of these cycles may help reduce the transmission of these pathogens to humans. METHODOLOGY/PRINCIPAL FINDINGS: The presence of campylobacters and salmonellas was examined in 631 fresh fecal samples of wild insectivorous bats using a specially developed method for the simultaneous isolation of low numbers of these pathogens in small-sized fecal samples (≤ 0...
2018: PloS One
https://www.readbyqxmd.com/read/29318796/recurrent-guillain-barr%C3%A3-syndrome-following-urinary-tract-infection-by-escherichia-coli
#3
Yoon Sik Jo, Jin Yong Choi, Hong Chung, Yuseok Kim, Sang Jun Na
Recurrent Guillain-Barré syndrome (GBS) is a rare, immune-mediated disease of the peripheral nervous system. It has been reported to occur at intervals ranging from four months to 10 years; published case studies suggest that 1%-6% of patients who have had GBS will experience recurrent attacks. The most commonly identified infections coinciding with GBS are Campylobacter jejuni, Haemophilus influenzae, Mycoplasma pneumonia, and cytomegalovirus, while an antecedent infection with Escherichia coli is very uncommon...
January 22, 2018: Journal of Korean Medical Science
https://www.readbyqxmd.com/read/29318721/catabolite-repression-in-campylobacter-jejuni-correlates-with-intracellular-succinate-levels
#4
Anne-Xander van der Stel, Chris H A van de Lest, Steven Huynh, Craig T Parker, Jos P van Putten, Marc M S M Wösten
Bacteria have evolved different mechanisms to catabolize carbon sources from nutrient mixtures. They first consume their preferred carbon source, before others are used. Regulatory mechanisms adapt the metabolism accordingly to maximize growth and to outcompete other organisms. The human pathogen Campylobacter jejuni is an asaccharolytic Gram-negative bacterium that catabolizes amino acids and organic acids for growth. It prefers serine and aspartate as carbon sources, however it lacks all regulators known to be involved in regulating carbon source utilization in other organisms...
January 10, 2018: Environmental Microbiology
https://www.readbyqxmd.com/read/29316981/host-specific-differences-in-the-response-of-cultured-macrophages-to-campylobacter-jejuni-capsule-and-o-methyl-phosphoramidate-mutants
#5
Sungwon Kim, Andrea Vela, Sara M Clohisey, Spiridoula Athanasiadou, Pete Kaiser, Mark P Stevens, Lonneke Vervelde
Campylobacter jejuni is the leading cause of bacterial food-borne gastroenteritis worldwide and human infections are frequently associated with handling and consumption of contaminated poultry. The polysaccharide capsule of C. jejuni plays important roles in colonisation of the chicken gut, invasion of epithelial cells and serum resistance and is subject to modification with O-methyl phosphoramidate (MeOPN) in most strains. In this study, the cytokine responses of mouse bone marrow-derived macrophages (mBMMs), chicken bone marrow-derived macrophages (chBMMs) and human monocyte-derived macrophages (hMDMs) were measured following infection with C...
January 9, 2018: Veterinary Research
https://www.readbyqxmd.com/read/29315030/antimicrobial-activity-of-n-halamine-coated-materials-in-broiler-chicken-houses
#6
Tian Ren, Mingyu Qiao, Lei Zhang, Jean Weese, Tung-Shi Huang, Xuehong Ren
The antimicrobial activity of 1-chloro-2,2,5,5-tetramethyl-4-imidazoidinone (MC), a nonbleaching N-halamine compound, was investigated on materials commonly used in broiler production, including stainless steel, galvanized metal, aluminum, plastic, and pressure-treated wood. MC aqueous solutions at 0.02, 0.04, and 0.06% were challenged with Salmonella Typhimurium and Campylobacter jejuni at 6 log CFU/mL, resulting in complete inactivation of both bacteria in 30 min with 0.06% MC. Follow-up experiments were performed using test materials treated with 0...
February 2018: Journal of Food Protection
https://www.readbyqxmd.com/read/29313470/serological-markers-of-recent-campylobacter-jejuni-infection-in-patients-with-guillain-barr%C3%A3-syndrome-in-the-state-of-piau%C3%A3-brazil-2014-2016
#7
Cyntia O Souza, Marcelo A C S Vieira, Francisca M A Batista, Kelsen D Eulálio, Jéssica M M Neves, Laís C Sá, Leni C R Monteiro, Walfrido S Almeida-Neto, Raimunda S S Azevedo, Dorcas L Costa, Ana C R Cruz
In countries where poliomyelitis has been eradicated, Guillain-Barré syndrome (GBS) is the leading cause of acute flaccid paralysis. The range of infections that precede GBS in Brazil is unknown. Campylobacter jejuni infection is the most frequent trigger of GBS worldwide. Given the lack of systematic surveillance of diarrheal diseases, particularly in adults, the incidence of enteritis caused by C. jejuni in developing countries is unknown. From 2014 to 2016, pretreatment serum samples from 63 GBS patients were tested by immunoglobulin M (IgM) enzyme-linked immunosorbent assay for C...
January 8, 2018: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/29311627/evolution-of-higher-torque-in-campylobacter-type-bacterial-flagellar-motors
#8
Bonnie Chaban, Izaak Coleman, Morgan Beeby
Understanding the evolution of molecular machines underpins our understanding of the development of life on earth. A well-studied case are bacterial flagellar motors that spin helical propellers for bacterial motility. Diverse motors produce different torques, but how this diversity evolved remains unknown. To gain insights into evolution of the high-torque ε-proteobacterial motor exemplified by the Campylobacter jejuni motor, we inferred ancestral states by combining phylogenetics, electron cryotomography, and motility assays to characterize motors from Wolinella succinogenes, Arcobacter butzleri and Bdellovibrio bacteriovorus...
January 8, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29306004/genetic-diversity-and-clonal-characteristics-of-ciprofloxacin-resistant-campylobacter-jejuni-isolated-from-chilean-patients-with-gastroenteritis
#9
Luis Collado, Nataly Muñoz, Lorena Porte, Sofía Ochoa, Carmen Varela, Ivo Muñoz
Campylobacter jejuni is a major cause of acute gastroenteritis worldwide. However, it has also been associated with other diseases such as bacteremia and with several post-infection sequelae. Although campylobacteriosis is usually a self-limited infection, antibiotics are indicated for severe and chronic conditions. Unfortunately, several industrialised nations have reported a substantial increase in antibiotic resistance of C. jejuni. However, there is still a lack of knowledge about the epidemiology of resistance developed by this pathogen in the developing world...
January 3, 2018: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/29286481/method-for-efficient-refolding-and-purification-of-chemoreceptor-ligand-binding-domain
#10
Mayra A Machuca, Anna Roujeinikova
Identification of natural ligands of chemoreceptors and structural studies aimed at elucidation of the molecular basis of the ligand specificity can be greatly facilitated by the production of milligram amounts of pure, folded ligand binding domains. Attempts to heterologously express periplasmic ligand binding domains of bacterial chemoreceptors in Escherichia coli (E. coli) often result in their targeting into inclusion bodies. Here, a method is presented for protein recovery from inclusion bodies, its refolding and purification, using the periplasmic dCACHE ligand binding domain of Campylobacter jejuni (C...
December 12, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29279578/characterization-and-application-of-lytic-bacteriophages-against-campylobacter-jejuni-isolated-from-poultry-in-japan
#11
Munenori Furuta, Takayuki Nasu, Kouichi Umeki, Duc Hoang Minh, Ken-Ichi Honjoh, Takahisa Miyamoto
 The aim was to isolate Campylobacter jejuni-specific lytic phages from meats on the market in Japan. These phages were effectively isolated from 13 of 15 (86.7%) retail chicken meat samples (skin and liver) by the enrichment method using Preston Campylobacter Selective Enrichment Broth and 10 host Campylobacter strains. Among the 26 phage isolates, 14 were extracted by means of C. jejuni L26 as a host strain. Phage PHC10 showed the broadest lytic spectrum: active against 67.4% of the 46 C. jejuni strains tested...
2017: Biocontrol Science
https://www.readbyqxmd.com/read/29274458/detection-of-virulence-genes-determining-the-ability-to-adhere-and-invade-in-campylobacter-spp-from-cattle-and-swine-in-poland
#12
Beata Wysok, Joanna Wojtacka
The aim of the study was to determine the prevalence of virulence genes responsible for the adhesion (flaA, cadF and racR) and invasion (virB11, iam and pldA) in Campylobacter isolates from cattle and swine and determine their adherence and invasion abilities. The studies conducted revealed high prevalence rate of adherence and invasion associated genes irrespective of the isolates origin. All Campylobacter strains of swine and cattle origin adhered to HeLa cells at mean level 0.1099% ± SD 0.1341% and 0...
December 20, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29273615/longitudinally-extensive-transverse-myelitis-after-campylobacter-jejuni-enteritis
#13
Yudy Llamas, Karl Hazel, Patrick Nicholson, Lisa Costelloe
Campylobacter jejuni infection is well-known to precipitate Guillain-Barré syndrome through an immune-mediated attack on the peripheral nervous system. Molecular mimicry between C. jejuni lipo-oligosaccharides on the surface of infectious agents and human gangliosides in the peripheral nerves induces cross-reactive immune responses. Although gangliosides also occur in the central nervous system (CNS), autoimmune CNS disorders rarely follow Cjejuni infections. However, longitudinally extensive transverse myelitis commonly has a parainfectious cause, triggered by a wide range of micro-organisms including viruses and bacteria...
December 22, 2017: Practical Neurology
https://www.readbyqxmd.com/read/29260646/epidemiology-of-campylobacter-infections-among-children-in-egypt
#14
Rebecca Sainato, Atef ElGendy, Frédéric Poly, Janelle Kuroiwa, Patricia Guerry, Mark S Riddle, Chad K Porter
Campylobacter is a frequently isolated bacterial pathogen among children with diarrhea. Data are lacking on the distribution and spectrum of disease associated with Campylobacter species and Campylobacter jejuni capsular polysaccharide (CPS) types. This information is essential because current vaccine research seeks to target specific CPS types. An effective CPS-conjugate vaccine will need to cover CPS types that are both common and associated with severe disease. The US Naval Medical Research Unit-3 conducted several prospective cohort studies researching diarrheal disease in Egypt from 1995 to 2003...
December 18, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/29250802/occurrence-of-enteropathogenic-bacteria-in-birds-of-prey-in-italy
#15
Antonio Gargiulo, Alessandro Fioretti, Tamara Pasqualina Russo, Lorena Varriale, Loredana Rampa, Silvia Paone, Luigi Maria De Luca Bossa, Pasquale Raia, Ludovico Dipineto
The importance of wild birds as potential vectors of disease has received recent renewed empirical interest, especially regarding human health although information regarding the enteropathogenic bacteria in birds of prey continue to be scant. This study was performed with the aim to evaluate the occurrence of enteropathogenic bacteria (i.e. Campylobacter spp. Escherichia coli, Salmonella spp.) in birds of prey carcasses in Southern Italy. The results of the present study showed a prevalence of 33.1% (49/148) for Campylobacter spp...
December 17, 2017: Letters in Applied Microbiology
https://www.readbyqxmd.com/read/29243991/zoonotic-agents-in-feral-pigeons-columba-livia-from-costa-rica-possible-improvements-to-diminish-contagion-risks
#16
Ana María Torres-Mejía, César Rodríguez, Francisco Duarte, Mauricio Jiménez-Soto, Fernando Esperón, Kinndle Blanco-Peña
Most studies on zoonotic agents in pigeons have been conducted in the Palearctic region, but the scarcity of data is notorious in the Neotropical region, where these birds can breed all year around and are in close contact with humans. In this study, we used a combination of culture-dependent and culture-independent methods to identify infectious agents in 141 fecal samples from pigeons collected at four urban parks from Costa Rica. Of these we identified 34 positive samples for Salmonella enterica subsp. enterica serovar Braenderup (24...
December 15, 2017: Vector Borne and Zoonotic Diseases
https://www.readbyqxmd.com/read/29237513/features-of-illnesses-caused-by-five-species-of-campylobacter-foodborne-diseases-active-surveillance-network-foodnet-2010-2015
#17
M E Patrick, O L Henao, T Robinson, A L Geissler, A Cronquist, S Hanna, S Hurd, F Medalla, J Pruckler, B E Mahon
The Foodborne Diseases Active Surveillance Network (FoodNet) conducts population-based surveillance for Campylobacter infection. For 2010 through 2015, we compared patients with Campylobacter jejuni with patients with infections caused by other Campylobacter species. Campylobacter coli patients were more often >40 years of age (OR = 1·4), Asian (OR = 2·3), or Black (OR = 1·7), and more likely to live in an urban area (OR = 1·2), report international travel (OR = 1·5), and have infection in autumn or winter (OR = 1·2)...
December 14, 2017: Epidemiology and Infection
https://www.readbyqxmd.com/read/29236304/enterovirus-detection-in-patients-with-acute-gastroenteritis-in-switzerland
#18
Rainer Gosert, Ulrich Heininger, Hans H Hirsch
Acute gastroenteritis (GE) has a major impact on morbidity and mortality worldwide, yet comprehensive data regarding infectious agents including enteroviruses are scarce. We hypothesized that enteroviruses constitute a significant cause of acute GE. We analyzed 677 stool samples from 504 patients, which had been submitted for suspected infectious GE. 0.2 ml of stool suspension was extracted using the Abbott m2000 sp robot and analysed by multiplex nucleic acid testing (NAT) using the Luminex xTAG gastrointestinal pathogen panel (GPP) as well as by specific NATs detecting enteroviruses and polioviruses...
December 13, 2017: Journal of Medical Virology
https://www.readbyqxmd.com/read/29233680/new-fpg-probe-chemistry-for-direct-detection-of-recombinase-polymerase-amplification-on-lateral-flow-strips
#19
Michael L Powell, Frank R Bowler, Aurore J Martinez, Catherine J Greenwood, Niall Armes, Olaf Piepenburg
Rapid, cost-effective and sensitive detection of nucleic acids has the ability to improve upon current practices employed for pathogen detection in diagnosis of infectious disease and food testing. Furthermore, if assay complexity can be reduced, nucleic acid amplification tests could be deployed in resource-limited and home use scenarios. In this study, we developed a novel Fpg (Formamidopyrimidine DNA glycosylase) probe chemistry, which allows lateral flow detection of amplification in undiluted recombinase polymerase amplification (RPA) reactions...
December 9, 2017: Analytical Biochemistry
https://www.readbyqxmd.com/read/29223488/oral-administration-of-plga-encapsulated-cpg-odn-and-campylobacter-jejuni-lysate-reduces-cecal-colonization-by-campylobacter-jejuni-in-chickens
#20
Khaled Taha-Abdelaziz, Douglas C Hodgins, Tamiru Negash Alkie, Wanderely Quinteiro-Filho, Alexander Yitbarek, Jake Astill, Shayan Sharif
Campylobacter jejuni (C. jejuni) is a major cause of bacterial food-borne illness in humans. It is considered a commensal organism of the chicken gut and infected chickens serve as a reservoir and shed bacteria throughout their lifespan. Contaminated poultry products are considered the major source of infection in humans. Therefore, to reduce the risk of human campylobacteriosis, it is essential to reduce the bacterial load in poultry products. The present study aimed to evaluate the protective effects of soluble and PLGA-encapsulated oligodeoxynucleotides (ODN) containing unmethylated CpG motifs (E-CpG ODN) as well as C...
December 6, 2017: Vaccine
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