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https://www.readbyqxmd.com/read/27920758/effectiveness-of-f18-fimbrial-antigens-released-by-a-novel-autolyzed-salmonella-expression-system-as-a-vaccine-candidate-against-lethal-f18-stec-infection
#1
Gayeon Won, John H Lee
Porcine edema disease (ED) caused by Shiga toxin 2e producing Escherichia coli expressing F18ab(+) fimbriae (F18ab(+)STEC) frequently occurs in post-weaned piglets, resulting in a significant economic loss in swine industries worldwide. In the present study, we proposed an efficient prevention scheme against ED in which the attenuated Salmonella Typhimurium inactivated by the E-mediated cell lysis to deliver target antigens, FedF and FedA, which function in fimbrial-mediated adhesion and as a major subunit of F18ab+fimbriae, respectively...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27917164/longitudinal-study-of-two-irish-dairy-herds-low-numbers-of-shiga-toxin-producing-escherichia-coli-o157-and-o26-super-shedders-identified
#2
Brenda P Murphy, Evonne McCabe, Mary Murphy, James F Buckley, Dan Crowley, Séamus Fanning, Geraldine Duffy
A 12-month longitudinal study was undertaken on two dairy herds to ascertain the Shiga-toxin producing Escherichia coli (STEC) O157 and O26 shedding status of the animals and its impact (if any) on raw milk. Cattle are a recognized reservoir for these organisms with associated public health and environmental implications. Animals shedding E. coli O157 at >10,000 CFU/g of feces have been deemed super-shedders. There is a gap in the knowledge regarding super-shedding of other STEC serogroups. A cohort of 40 lactating cows from herds previously identified as positive for STEC in a national surveillance project were sampled every second month between August, 2013 and July, 2014...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27916888/a-topographical-atlas-of-shiga-toxin-2e-receptor-distribution-in-the-tissues-of-weaned-piglets
#3
Daniel Steil, Robert Bonse, Iris Meisen, Gottfried Pohlentz, German Vallejo, Helge Karch, Johannes Müthing
Shiga toxin (Stx) 2e of Stx-producing Escherichia coli (STEC) is the primary virulence factor in the development of pig edema disease shortly after weaning. Stx2e binds to the globo-series glycosphingolipids (GSLs) globotriaosylceramide (Gb3Cer, Galα1-4Galβ1-4Glcβ1-1Cer) and globotetraosylceramide (Gb4Cer, GalNAcβ1-3Galα1-4Galβ1-4Glcβ1-1Cer), the latter acting as the preferential Stx2e receptor. We determined Stx receptor profiles of 25 different tissues of a male and a female weaned piglet using immunochemical solid phase binding assays combined with mass spectrometry...
November 30, 2016: Toxins
https://www.readbyqxmd.com/read/27905628/-virulence-mechanisms-of-enteropathogenic-escherichia-coli
#4
Ana Elvira Farfán-García, Sandra Catherine Ariza-Rojas, Fabiola Andrea Vargas-Cárdenas, Lizeth Viviana Vargas-Remolina
Acute diarrheal disease (ADD) is a global public health problem, especially in developing countries and is one of the causes of mortality in children under five. ADD etiologic agents include viruses, bacteria and parasites in that order. Escherichia coli bacteria it is classified as a major diarrheagenic agent and transmitted by consuming contaminated water or undercooked foods. This review compiled updates on information virulence factors and pathogenic mechanisms involved in adhesion and colonization of seven pathotypes of E...
August 2016: Revista Chilena de Infectología: órgano Oficial de la Sociedad Chilena de Infectología
https://www.readbyqxmd.com/read/27895483/improved-proliferation-of-antigen-specific-cytolytic-t-lymphocytes-using-a-multimodal-nanovaccine
#5
Bo Li, Michael Siuta, Vanessa Bright, Dmitry Koktysh, Brittany K Matlock, Megan E Dumas, Meiying Zhu, Alex Holt, Donald Stec, Shenglou Deng, Paul B Savage, Sebastian Joyce, Wellington Pham
The present study investigated the immunoenhancing property of our newly designed nanovaccine, that is, its ability to induce antigen-specific immunity. This study also evaluated the synergistic effect of a novel compound PBS-44, an α-galactosylceramide analog, in boosting the immune response induced by our nanovaccine. The nanovaccine was prepared by encapsulating ovalbumin (ova) and an adjuvant within the poly(lactic-co-glycolic acid) nanoparticles. Quantitative analysis of our study data showed that the encapsulated vaccine was physically and biologically stable; the core content of our nanovaccine was found to be released steadily and slowly, and nearly 90% of the core content was slowly released over the course of 25 days...
2016: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/27893870/associations-between-hydration-status-intravenous-fluid-administration-and-outcomes-of-patients-infected-with-shiga-toxin-producing-escherichia-coli-a-systematic-review-and-meta-analysis
#6
Silviu Grisaru, Jianling Xie, Susan Samuel, Lisa Hartling, Phillip I Tarr, David Schnadower, Stephen B Freedman
Importance: The associations between hydration status, intravenous fluid administration, and outcomes of patients infected with Shiga toxin-producing Escherichia coli (STEC) remain unclear. Objective: To determine the relationship between hydration status, the development and severity of hemolytic uremic syndrome (HUS), and adverse outcomes in STEC-infected individuals. Data Sources: MEDLINE, EMBASE, Cochrane Central Register of Controlled Trials via the OvidSP platform, PubMed via the National Library of Medicine, CINAHL Plus with full text, Scopus, Web of Science, ClinicalTrials...
November 28, 2016: JAMA Pediatrics
https://www.readbyqxmd.com/read/27891338/non-o157-h7-shiga-toxin-producing-diarrhoeagenic-escherichia-coli-stec-in-southern-india-a-tinderbox-for-starting-epidemic
#7
Shashank Purwar, Subrana Roy, Sharada Metgud
INTRODUCTION: Outbreaks due to non-O157:H7 Shiga toxin producing Escherichia coli (STEC) resulting in Haemolytic Uraemic Syndrome (HUS) have garnered much attention because of associated mortality transcending across continents and also because diarrhoea due to E.coli itself is rare in developed countries. The actual incidence of non-O157:H7 STEC in sporadic acute diarrhoea is not fully elucidated, both in developing as well as in developed countries. Due to larger extent of faecal-oral transmission in developing countries it is prudent to look for non-O157: H7 STEC in such epidemiological settings because of very high potential to spread across larger geographical regions and cause life threatening illness...
October 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27891181/whole-genome-sequencing-and-comparative-genomic-analysis-of-escherichia-coli-o91-strains-isolated-from-symptomatic-and-asymptomatic-human-carriers
#8
Taesoo Kwon, Young-Seok Bak, Young-Hee Jung, Young-Bin Yu, Jong Tae Choi, Cheorl-Ho Kim, Jung-Beom Kim, Won Kim, Seung-Hak Cho
BACKGROUND: The Shiga toxin-producing Escherichia coli (STEC) O91:H21 strains NCCP15736 and NCCP15737 were isolated during a single outbreak in Korea, NCCP15736 from a symptomatic carrier and NCCP15737 from an asymptomatic carrier. To investigate genomic differences between the two strains, we performed whole-genome sequencing of both strains and conducted a comparative genomic analysis. RESULTS: Using the Illumina HiSeq 2000 platform and Rapid Annotation using the Subsystem Technology (RAST) server, whole-genome sequences of NCCP15736 and NCCP15737 were obtained and annotated...
2016: Gut Pathogens
https://www.readbyqxmd.com/read/27878803/tissue-doppler-echocardiography-detects-subclinical-left-ventricular-dysfunction-in-patients-undergoing-chemotherapy-for-colon-cancer-insights-from-oncoecho-multicenter-study
#9
Edyta Płońska-Gościniak, Monika Różewicz, Jarosław Kasprzak, Andrzej Wojtarowicz, Katarzyna Mizia-Stec, Tomasz Hryniewiecki, Piotr Pysz, Andrzej Kułach, Artur Bodys, Violetta Sulżyc, Wojciech Braksator, Andrzej Szyszka, Beata Zaborska, Adrianna Gościńska-Szmagała, Maciej Siński, Dariusz Kosior, Ilona Kowalik, Zbigniew Gąsior
I BACKGROUND: Colorectal cancer (CRC) is the second most common cancer in women and the third in men in Poland. The role of chemotherapy (CTX) depends on stage of CRC: adjuvant CTX is a standard treatment in stage III and should also be considered in stage II with risk factors. AIM: The aim of the paper was to assess the cardiovascular consequences of CTX in CRC enrolled to the ONCOECHO multicenter study (2012 - 2014). To identify potential cardiotoxicity we focused on myocardial function, heart rhythm and conduction disorders and adverse cardiovascular events...
November 23, 2016: Kardiologia Polska
https://www.readbyqxmd.com/read/27872453/huge-interventricular-septal-aneurysm-diagnosed-in-vivo-in-an-adult
#10
Błażej Kusz, Magdalena Mizia, Wojciech Wróbel, Katarzyna Mizia-Stec
No abstract text is available yet for this article.
October 28, 2016: Polskie Archiwum Medycyny Wewnętrznej
https://www.readbyqxmd.com/read/27872443/microvolt-t-wave-alternans-testing-is-abnormal-both-in-left-and-right-sided-pathology
#11
EDITORIAL
Katarzyna Mizia-Stec
No abstract text is available yet for this article.
November 2016: Anatolian Journal of Cardiology
https://www.readbyqxmd.com/read/27869602/secondary-shiga-toxin-producing-escherichia-coli-infection-japan-2010-2012
#12
Tomoko Morita-Ishihara, Sunao Iyoda, Atsushi Iguchi, Makoto Ohnishi
To evaluate the potential public health risk caused by secondary Shiga toxin-producing Escherichia coli (STEC) infections in Japan, we investigated the prevalence and characteristics of STEC isolated from healthy adults during 2010-2012. Although prevalence among healthy adults was high, most STEC organisms displayed characteristics rarely found in isolates from symptomatic patients.
December 2016: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/27865199/cha2ds2-vasc-af2-score-accurately-predicts-moderate-to-severe-acute-neurological-dysfunction-in-the-course-of-first-ever-ischaemic-stroke
#13
Maciej T Wybraniec, Maciej Faryan, Błażej Kusz, Anetta Lasek-Bal, Katarzyna Mizia-Stec
No abstract text is available yet for this article.
November 12, 2016: International Journal of Cardiology
https://www.readbyqxmd.com/read/27853704/molecular-and-phylogenetic-characterization-of-non-o157-shiga-toxin-producing-escherichia-coli-strains-in-china
#14
Xiangning Bai, Bin Hu, Yanmei Xu, Hui Sun, Ailan Zhao, Pengbin Ba, Shanshan Fu, Ruyue Fan, Yujuan Jin, Hong Wang, Qiusheng Guo, Xuebin Xu, Shan Lu, Yanwen Xiong
Shiga toxin-producing Escherichia coli (STEC) causes diarrhea and hemorrhagic colitis with life-threatening complications, such as hemolytic uremic syndrome. The aim of this study was to assess the molecular epidemiologic features of non-O157 STEC strains from different resources in China and illustrate the role of animal reservoirs or animal-derived foodstuffs in human STEC infections. A collection of 301 non-O157 STEC isolates from domestic and wild animals (i.e., cattle, goat, pig, yak, pika, and antelope), raw meats (i...
2016: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/27842895/transmission-pathways-for-sporadic-shiga-toxin-producing-e-coli-infections-a-systematic-review-and-meta-analysis
#15
Erica Kintz, Julii Brainard, Lee Hooper, Paul Hunter
BACKGROUND: Shiga-toxin E. coli infections remain a public health concern because of the severity of the gastrointestinal illness and associated complications. Transmission pathways are typically elucidated from outbreaks, with foodborne transmission the primary source. However, most STEC cases are sporadic. This systematic review aimed to identify the most common pathways for sporadic STEC transmission and quantify their importance. METHODS: We systematically reviewed epidemiological studies of sporadic (non-outbreak) STEC cases that investigated potential risk factors...
January 2017: International Journal of Hygiene and Environmental Health
https://www.readbyqxmd.com/read/27826079/purified-stx-and-%C3%AE-phage-initiator-o-proteins-bind-specifically-to-two-different-origins-of-replication-in%C3%A2-vitro
#16
Katarzyna I Kozłowska, Joanna Tymecka-Mulik, Grzegorz Węgrzyn
The O protein is a crucial factor initiating the DNA replication of lambdoid bacteriophage. Efficient DNA replication of Shiga toxin-converting phage is necessary for effective production of Shiga toxin - main virulence factor of STEC strains. We developed an improved protocol for overproduction, bacterial cell lysis and purification of λO protein. With use of this method we have also isolated O proteins of Stx-phage P27 and 933W that were never purified before. Purified proteins were tested for their DNA binding activity and revealed a sequence specific interactions...
November 5, 2016: Protein Expression and Purification
https://www.readbyqxmd.com/read/27817960/multifaceted-immune-responses-and-protective-efficacy-elicited-by-a-recombinant-autolyzed-salmonella-expressing-flic-flagellar-antigen-of-f18-escherichia-coli
#17
Gayeon Won, John Hwa Lee
Porcine edema disease (ED) caused by F18(+) Shiga toxin 2e-producing Escherichia coli (STEC) has imposed significant economic losses in the swine industry worldwide, resulting in sudden deaths in post-weaned piglets. The flagellin protein of F18(+) STEC, a structural component of the flagellar filament, is a known virulence factor that mediates adhesion and invasion to porcine epithelial cells. In this study, Salmonella inactivated by the E lysis gene and expressing the flagellin (fliC) antigen was genetically engineered utilizing a plasmid (pMMP184) carrying an efficient heterologous antigen delivery system...
December 7, 2016: Vaccine
https://www.readbyqxmd.com/read/27800426/prevalence-and-molecular-characterisation-of-shiga-toxin-producing-escherichia-coli-in-raw-milk-cheeses-from-lazio-region-italy
#18
Selene Marozzi, Paola De Santis, Sarah Lovari, Roberto Condoleo, Stefano Bilei, Rita Marcianò, Ziad Mezher
In recent years, the incidence of foodborne diseases caused by Shiga toxin-producing Escherichia coli (STEC) has increased globally. For this reason, within the specific regional control plan for the detection of STEC in food products in Italy, the presence of STEC in unpasteurised milk cheeses was investigated. In total, 203 samples obtained from March 2011 to December 2013 were analysed, with two standard methods (ISO 16654:2001 and ISO 13136:2012). Two strains of E. coli O157 were isolated (2/161, 1.2%) but did not carry any virulence-associated genes and 22 stx-positive samples (22/146, 15...
January 18, 2016: Italian Journal of Food Safety
https://www.readbyqxmd.com/read/27795338/clinical-microbiology-laboratories-adoption-of-culture-independent-diagnostic-tests-are-a-threat-to-food-borne-disease-surveillance-in-the-united-states
#19
Shari Shea, Kristy A Kubota, Hugh Maguire, Stephen Gladbach, Amy Woron, Robyn Atkinson-Dunn, Marc Roger Couturier, Melissa B Miller
In November, 2015, the Centers for Disease Control and Prevention (CDC) sent a letter to State and Territorial epidemiologists, State and Territorial public health laboratory directors, and State and Territorial health officials. In this letter, culture independent diagnostic tests (CIDTs) for detection for enteric pathogens were characterized as "a serious and current threat to public health surveillance, particularly for Shiga toxin-producing E. coli (STEC) and Salmonella." The document says CDC and its public health partners are approaching this issue, in part, by "reviewing regulatory authority in public health agencies to require culture isolates or specimen submission if CIDTs are used...
October 19, 2016: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/27787756/characterization-of-virulence-factors-and-phylogenetic-group-determination-of-escherichia-coli-isolated-from-diarrheic-and-non-diarrheic-calves-from-brazil
#20
Fernanda Morcatti Coura, Soraia de Araújo Diniz, Jamili Maria Suhet Mussi, Marcos Xavier Silva, Andrey Pereira Lage, Marcos Bryan Heinemann
This study aimed to detect virulence factors, pathovars, and phylogenetic groups of Escherichia coli strains obtained from feces of calves with and without diarrhea up to 70 days old and to determine the association between occurrence of diarrhea, phylogenetic groups, and pathovars. Phylo-typing analysis of the 336 E. coli strains isolated from calves with Clermont method showed that 21 (6.25 %) belong to phylogroup A, 228 (67.85 %) to phylogroup B1, 2 (0.6 %) to phylogroup B2, 5 (1.49 %) to phylogroup C, 57 (16...
October 27, 2016: Folia Microbiologica
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