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Escherichia Coli and Hemolytic Uremic syndrome

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https://www.readbyqxmd.com/read/29156596/microvesicle-involvement-in-shiga-toxin-associated-infection
#1
REVIEW
Annie Villysson, Ashmita Tontanahal, Diana Karpman
Shiga toxin is the main virulence factor of enterohemorrhagic Escherichia coli, a non-invasive pathogen that releases virulence factors in the intestine, causing hemorrhagic colitis and, in severe cases, hemolytic uremic syndrome (HUS). HUS manifests with acute renal failure, hemolytic anemia and thrombocytopenia. Shiga toxin induces endothelial cell damage leading to platelet deposition in thrombi within the microvasculature and the development of thrombotic microangiopathy, mostly affecting the kidney. Red blood cells are destroyed in the occlusive capillary lesions...
November 19, 2017: Toxins
https://www.readbyqxmd.com/read/29152837/effect-of-nanoliposomes-containing-zataria-multiflora-boiss-essential-oil-on-gene-expression-of-shiga-toxin-2-in-escherichia-coli-o157-h7
#2
Seyed Amin Khatibi, Ali Misaghi, Mir-Hassan Moosavy, Afshin Akhondzadeh Basti, Samira Mohamadian, Ali Khanjari
AIMS: Enterohaemorrhagic Escherichia coli (EHEC) serotype O157:H7 as a major human pathogen is responsible for food borne outbreaks, bloody diarrhea, hemorrhagic colitis and hemolytic uremic syndrome (HUS) and even death. In this study, the antibacterial activity of the Zataria multiflora essential oil (ZMEO) and nanoliposome-encapsulated ZMEO was evaluated on the pathogenicity of Escherichia coli O157:H7. METHODS AND RESULTS: The minimum inhibitory concentrations (MIC) of essential oil (EO) were determined against the bacterium before and after encapsulation into nanoliposome...
November 20, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/29152520/a-case-of-escherichia-coli-hemolytic-uremic-syndrome-in-a-10-year-old-male-with-severe-neurologic-involvement-successfully-treated-with-eculizumab
#3
Malia Rasa, James Musgrave, Keith Abe, Len Tanaka, Konstantine Xoinis, Bruce Shiramizu, Gretchen Foskett, Rhiana Lau
Hemolytic uremic syndrome (HUS) can be classified as typical and atypical, and the treatment recommendations currently differ between the 2 types. Eculizumab is recommended as first-line treatment for atypical HUS; however, its use in typical HUS has been controversial. We report a case of a 10-year-old male with severe neurologic impairment who was successfully treated with eculizumab, which was started 4 days after onset of neurologic symptoms. Our case supports the use of eculizumab in typical HUS with neurologic involvement, even when given later in the course, as the pathophysiology of typical HUS has been shown to involve activation of the complement pathway, similar to atypical HUS...
October 2017: Journal of Investigative Medicine High Impact Case Reports
https://www.readbyqxmd.com/read/29148397/evolutionary-context-of-non-sorbitol-fermenting-shiga-toxin-producing-escherichia-coli-o55-h7
#4
Kyle Schutz, Lauren A Cowley, Sharif Shaaban, Anne Carroll, Eleanor McNamara, David L Gally, Gauri Godbole, Claire Jenkins, Timothy J Dallman
In July 2014, an outbreak of Shiga toxin-producing Escherichia coli (STEC) O55:H7 in England involved 31 patients, 13 (42%) of whom had hemolytic uremic syndrome. Isolates were sequenced, and the sequences were compared with publicly available sequences of E. coli O55:H7 and O157:H7. A core-genome phylogeny of the evolutionary history of the STEC O55:H7 outbreak strain revealed that the most parsimonious model was a progenitor enteropathogenic O55:H7 sorbitol-fermenting strain, lysogenized by a Shiga toxin (Stx) 2a-encoding phage, followed by loss of the ability to ferment sorbitol because of a non-sense mutation in srlA...
December 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/29121863/multiplex-real-time-pcr-assay-for-detection-of-escherichia-coli-o157-h7-and-screening-for-non-o157-shiga-toxin-producing-e-coli
#5
Baoguang Li, Huanli Liu, Weimin Wang
BACKGROUND: Shiga toxin-producing Escherichia coli (STEC), including E. coli O157:H7, are responsible for numerous foodborne outbreaks annually worldwide. E. coli O157:H7, as well as pathogenic non-O157:H7 STECs, can cause life-threating complications, such as bloody diarrhea (hemolytic colitis) and hemolytic-uremic syndrome (HUS). Previously, we developed a real-time PCR assay to detect E. coli O157:H7 in foods by targeting a unique putative fimbriae protein Z3276. To extend the detection spectrum of the assay, we report a multiplex real-time PCR assay to specifically detect E...
November 9, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/29080423/prevalence-and-characteristics-of-shiga-toxin-producing-escherichia-coli-in-finishing-pigs-implications-on-public-health
#6
Wonhee Cha, Pina M Fratamico, Leah E Ruth, Andrew S Bowman, Jacqueline M Nolting, Shannon D Manning, Julie A Funk
Shiga toxin-producing Escherichia coli (STEC) are important food-borne pathogens, which can cause serious illnesses, including hemorrhagic colitis and hemolytic uremic syndrome. To study the epidemiology of STEC in finishing pigs and examine the potential risks they pose for human STEC infections, we conducted a longitudinal cohort study in three finishing sites. Six cohorts of pigs (2 cohorts/site, 20 pigs/cohort) were randomly selected, and fecal samples (n=898) were collected every two weeks through their finishing period...
October 21, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/29068360/soluble-cd40-ligand-and-oxidative-response-are-reciprocally-stimulated-during-shiga-toxin-associated-hemolytic-uremic-syndrome
#7
Maria J Abrey Recalde, Romina S Alvarez, Fabiana Alberto, Maria P Mejias, Maria V Ramos, Romina J Fernandez Brando, Andrea C Bruballa, Ramon A Exeni, Laura Alconcher, Cristina A Ibarra, María M Amaral, Marina S Palermo
Shiga toxin (Stx), produced by Escherichia coli, is the main pathogenic factor of diarrhea-associated hemolytic uremic syndrome (HUS), which is characterized by the obstruction of renal microvasculature by platelet-fibrin thrombi. It is well known that the oxidative imbalance generated by Stx induces platelet activation, contributing to thrombus formation. Moreover, activated platelets release soluble CD40 ligand (sCD40L), which in turn contributes to oxidative imbalance, triggering the release of reactive oxidative species (ROS) on various cellular types...
October 25, 2017: Toxins
https://www.readbyqxmd.com/read/29054297/hemolytic-uremic-syndrome-due-to-shiga-toxin-producing-escherichia-coli-infection
#8
REVIEW
M Bruyand, P Mariani-Kurkdjian, M Gouali, H de Valk, L A King, S Le Hello, S Bonacorsi, C Loirat
The leading cause of hemolytic uremic syndrome (HUS) in children is Shiga toxin-producing Escherichia coli (STEC) infection, which has a major outbreak potential. Since the early 2010s, STEC epidemiology is characterized by a decline of the historically predominant O157 serogroup and the emergence of non-O157 STEC, especially O26 and O80 in France. STEC contamination occurs through the ingestion of contaminated food or water, person-to-person transmission, or contact with ruminants or their contaminated environment...
October 17, 2017: Médecine et Maladies Infectieuses
https://www.readbyqxmd.com/read/28981517/a-recombinant-o-polysaccharide-protein-conjugate-approach-to-develop-highly-specific-monoclonal-antibodies-to-shiga-toxin-producing-escherichia-coli-o157-and-o145-serogroups
#9
Daniela S Castillo, Diego A Rey Serantes, Luciano J Melli, Andrés E Ciocchini, Juan E Ugalde, Diego J Comerci, Alejandro Cassola
Shiga toxin-producing Escherichia coli (STEC) is the major etiologic agent of hemolytic-uremic syndrome (HUS). The high rate of HUS emphasizes the urgency for the implementation of primary prevention strategies to reduce its public health impact. Argentina shows the highest rate of HUS worldwide, being E. coli O157 the predominant STEC-associated HUS serogroup (>70%), followed by E. coli O145 (>9%). To specifically detect these serogroups we aimed at developing highly specific monoclonal antibodies (mAbs) against the O-polysaccharide (O-PS) section of the lipopolysaccharide (LPS) of the dominant STEC-associated HUS serogroups in Argentina...
2017: PloS One
https://www.readbyqxmd.com/read/28970221/characterization-of-sorbitol-fermenting-enterohemorrhagic-escherichia-coli-o157-h-from-czech-patients-identifies-novel-plasmid-composition-not-previously-seen-in-german-isolates
#10
Andreas Bauwens, Monika Marejková, Barbara Middendorf-Bauchart, Rita Prager, Annelene Kossow, Wenlan Zhang, Helge Karch, Alexander Mellmann, Martina Bielaszewska
Sorbitol-fermenting (SF) enterohemorrhagic Escherichia coli (EHEC) O157:H(-) strains, first identified in Germany, have emerged as important pathogens throughout Europe. Besides chromosomally encoded Shiga toxin 2a, the major virulence factor, several putative virulence loci including the hly, etp, and sfp operons encoding EHEC hemolysin, type II secretion system, and Sfp fimbriae, respectively, are located on a 121 kb plasmid pSFO157 in German strains. Here, we report novel SF EHEC O157:H(-) strains isolated from patients in the Czech Republic...
September 29, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28959735/zebrafish-danio-rerio-as-a-vertebrate-model-host-to-study-colonization-pathogenesis-and-transmission-of-foodborne-escherichia-coli-o157
#11
Daniel H Stones, Alexander G J Fehr, Laurel Thompson, Jacqueline Rocha, Nicolas Perez-Soto, Vipin T P Madhavan, Kerstin Voelz, Anne Marie Krachler
Foodborne infections with enterohemorrhagic Escherichia coli (EHEC) are a major cause of diarrheal illness in humans and can lead to severe complications such as hemolytic uremic syndrome. Cattle and other ruminants are the main reservoir of EHEC, which enters the food chain through contaminated meat, dairy, or vegetables. Here, we describe the establishment of a vertebrate model for foodborne EHEC infection, using larval zebrafish (Danio rerio) as a host and the protozoan prey Paramecium caudatum as a vehicle...
September 2017: MSphere
https://www.readbyqxmd.com/read/28947259/-hemolytic-and-uremic-syndrome-and-related-thrombotic-microangiopathies-treatment-and-prognosis
#12
C Rafat, P Coppo, F Fakhouri, V Frémeaux-Bacchi, C Loirat, J Zuber, E Rondeau
Major achievements in the understanding of thrombotic microangiopathies (TMA) have not only resulted in a reclassification of TMA but most of all they have culminated in the design of new treatments and have enabled clinicians to better delineate their prognosis. Recent multicenter studies have improved our understanding of the prognosis of atypical hemolytic and uremic syndromes (aHUS). More specifically, they have highlighted the role of genetic testing on predicting the recurrence of aHUS, the risk of chronic kidney disease and the recurrence following kidney transplantation...
September 22, 2017: La Revue de Médecine Interne
https://www.readbyqxmd.com/read/28943538/hemolytic-uremic-syndrome-associated-encephalopathy-successfully-treated-with-corticosteroids
#13
Takashi Hosaka, Kiyotaka Nakamagoe, Akira Tamaoka
The encephalopathy that occurs in association with hemolytic uremic syndrome (HUS), which is caused by enterohemorrhagic Escherichia coli (E. coli), has a high mortality rate and patients sometimes present sequelae. We herein describe the case of a 20-year-old woman who developed encephalopathy during the convalescent stage of HUS caused by E.coli O26. Hyperintense lesions were detected in the pons, basal ganglia, and cortex on diffusion-weighted brain MRI. From the onset of HUS encephalopathy, we treated the patient with methylprednisolone (mPSL) pulse therapy alone...
September 25, 2017: Internal Medicine
https://www.readbyqxmd.com/read/28935743/genome-sequence-for-shiga-toxin-producing-escherichia-coli-o26-h11-associated-with-a-cluster-of-hemolytic-uremic-syndrome-cases-in-south-africa-2017
#14
Anthony M Smith, Kalule J Bosco, Mark P Nicol, Jackie Kleynhans, Mignon McCulloch, Sanelisiwe T Duze, Arshad Ismail, Mushal Allam, Nomsa P Tau, Karen H Keddy
Shiga toxin-producing Escherichia coli (STEC) strains are primarily foodborne pathogens that may cause diarrheal outbreaks and are associated with severe complications, specifically hemolytic-uremic syndrome (HUS). We report here genome sequence data for STEC O26:H11, which is associated with a cluster of cases of HUS, a rarely described syndrome in South Africa.
September 21, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28930030/mild-illness-during-outbreak-of-shiga-toxin-producing-escherichia-coli-o157-infections-associated-with-agricultural-show-australia
#15
Bhakti R Vasant, Russell J Stafford, Amy V Jennison, Sonya M Bennett, Robert J Bell, Christine J Doyle, Jeannette R Young, Susan A Vlack, Paul Titmus, Debra El Saadi, Kari A J Jarvinen, Patricia Coward, Janine Barrett, Megan Staples, Rikki M A Graham, Helen V Smith, Stephen B Lambert
During a large outbreak of Shiga toxin-producing Escherichia coli illness associated with an agricultural show in Australia, we used whole-genome sequencing to detect an IS1203v insertion in the Shiga toxin 2c subunit A gene of Shiga toxin-producing E. coli. Our study showed that clinical illness was mild, and hemolytic uremic syndrome was not detected.
October 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28925976/shiga-toxin-therapeutics-beyond-neutralization
#16
REVIEW
Gregory Hall, Shinichiro Kurosawa, Deborah J Stearns-Kurosawa
Ribotoxic Shiga toxins are the primary cause of hemolytic uremic syndrome (HUS) in patients infected with Shiga toxin-producing enterohemorrhagic Escherichia coli (STEC), a pathogen class responsible for epidemic outbreaks of gastrointestinal disease around the globe. HUS is a leading cause of pediatric renal failure in otherwise healthy children, resulting in a mortality rate of 10% and a chronic morbidity rate near 25%. There are currently no available therapeutics to prevent or treat HUS in STEC patients despite decades of work elucidating the mechanisms of Shiga toxicity in sensitive cells...
September 19, 2017: Toxins
https://www.readbyqxmd.com/read/28888654/shiga-toxin-producing-escherichia-coli-stec-o22-h8-isolated-from-cattle-reduces-e-coli-o157-h7-adherence-in-vitro-and-in-vivo
#17
L Martorelli, A Albanese, D Vilte, R Cantet, A Bentancor, G Zolezzi, I Chinen, C Ibarra, M Rivas, E C Mercado, A Cataldi
PROBLEM ADDRESSED: Shiga toxin-producing Escherichia coli (STEC) are a group of bacteria responsible for food-associated diseases. Clinical features include a wide range of symptoms such as diarrhea, hemorrhagic colitis and the hemolytic uremic syndrome (HUS), a life-threatening condition. OBJECTIVE: Our group has observed that animals naturally colonized with STEC strains of unknown serotype were not efficiently colonized with E. coli O157:H7 after experimental infection...
September 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28843125/combination-of-essential-oil-compounds-and-phenolic-acids-against-escherichia-coli-o157-h7-in-vitro-and-in-dry-fermented-sausage-production
#18
Natan V B Meira, Richard A Holley, Keliani Bordin, Renata E F de Macedo, Fernando B Luciano
Escherichia coli O157:H7 is a foodborne pathogen that causes hemorrhagic colitis and hemolytic uremic syndrome. The low dose of infection and severity of the disease represent a concern to public health. Natural compounds have been widely applied as food additives to replace synthetic preservatives. The aim of this study was to determine the efficiency of essential oil compounds (EOCs) in combination with phenolic acids (PA) in vitro and in dry-fermented sausage production. Minimum Inhibitory Concentration (MIC) and Fractional Inhibitory Concentration index (FICindex) were determined for a 5-strain mixture of E...
August 16, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/28835862/late-onset-cobalamin-disorder-and-hemolytic-uremic-syndrome-a-rare-cause-of-nephrotic-syndrome
#19
Gianluigi Ardissino, Michela Perrone, Francesca Tel, Sara Testa, Amelia Morrone, Ilaria Possenti, Francesco Tagliaferri, Robertino Dilena, Francesca Menni
Hemolytic uremic syndrome (HUS) is an unrare and severe thrombotic microangiopathy (TMA) caused by several pathogenetic mechanisms among which Shiga toxin-producing Escherichia coli infections and complement dysregulation are the most common. However, very rarely and particularly in neonates and infants, disorders of cobalamin metabolism (CblC) can present with or be complicated by TMA. Herein we describe a case of atypical HUS (aHUS) related to CblC disease which first presented in a previously healthy boy at age of 13...
2017: Case Reports in Pediatrics
https://www.readbyqxmd.com/read/28830351/genome-sequencing-and-comparative-genomics-of-enterohemorrhagic-escherichia-coli-o145-h25-and-o145-h28-reveal-distinct-evolutionary-paths-and-marked-variations-in-traits-associated-with-virulence-colonization
#20
Sandra C Lorenz, Narjol Gonzalez-Escalona, Michael L Kotewicz, Markus Fischer, Julie A Kase
BACKGROUND: Enterohemorrhagic Escherichia coli (EHEC) O145 are among the top non-O157 serogroups associated with severe human disease worldwide. Two serotypes, O145:H25 and O145:H28 have been isolated from human patients but little information is available regarding the virulence repertoire, origin and evolutionary relatedness of O145:H25. Hence, we sequenced the complete genome of two O145:H25 strains associated with hemolytic uremic syndrome (HUS) and compared the genomes with those of previously sequenced O145:H28 and other EHEC strains...
August 22, 2017: BMC Microbiology
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