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https://www.readbyqxmd.com/read/27905628/-virulence-mechanisms-of-enteropathogenic-escherichia-coli
#1
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/27895858/distribution-of-pathogenicity-island-pai-markers-and-phylogenetic-groups-in-diarrheagenic-and-commensal-escherichia-coli-from-young-children
#2
Ghazal Naderi, Fakhri Haghi, Habib Zeighami, Fatemeh Hemati, Neda Masoumian
AIM: This case-control study investigated the various PAI markers, phylogenetic groups and antimicrobial susceptibility among DEC and commensal E. coli isolates. BACKGROUND: Diarrheagenic Escherichia coli (DEC) is an emerging agent among pathogens that cause diarrheal diseases and represents a major public health problem in developing countries. The major difference in virulence among DEC pathotype and commensals may be related to the presence of specific genomic segments, termed pathogenicity islands (PAIs)...
2016: Gastroenterology and Hepatology From Bed to Bench
https://www.readbyqxmd.com/read/27891414/paediatric-urinary-tract-infection-a-hospital-based-experience
#3
Khursheed Ahmed Wani, Mohd Ashraf, Javaid Ahmed Bhat, Nazir Ahmed Parry, Lubna Shaheen, Sartaj Ali Bhat
INTRODUCTION: Paediatric Urinary Tract Infection (UTI) is one of the commonly encountered entities by paediatricians. Studies have shown easy vulnerability of paediatric urinary tract in any acute febrile illness and a miss in diagnosis could have long term consequences like renal scaring with its adverse effects. Bearing these evidence based preludes in view we designed our study to know the prevalence of UTI in Kashmir province. AIM: Aim of the present study was to know the prevalence of UTI in febrile children and to know the sensitivity of different imaging modalities like Renal and Urinary Bladder Ultrasonography (RUS), Voiding Cystourethrography (VCUG) and Dimercaptosuccinic Acid (DMSA) scan in diagnosing UTI...
October 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27890813/international-travel-is-a-risk-factor-for-extended-spectrum-%C3%AE-lactamase-producing-enterobacteriaceae-acquisition-in-children-a-single-center-case-case-control-study-in-an-urban-u-s-hospital
#4
Jonathan P Strysko, Vidya Mony, Jeremiah Cleveland, Hanna Siddiqui, Peter Homel, Christina Gagliardo
BACKGROUND: Extended-spectrum β-lactamase-producing Enterobacteriaceae (ESBL) infections are increasing in both adults and children. The aim of this study was to describe the epidemiology of children with ESBL in an urban and ethnically-diverse population, to determine what proportion of these infections were community-onset, and to identify risk factors predisposing children to ESBL acquisition. METHODS: A case-case-control study of children aged 0-18 years was conducted from 2012-2014...
November 24, 2016: Travel Medicine and Infectious Disease
https://www.readbyqxmd.com/read/27885442/patterns-and-trends-of-pediatric-bloodstream-infections-a-7-year-surveillance-study
#5
N Buetti, A Atkinson, L Kottanattu, J Bielicki, J Marschall, A Kronenberg
We characterize the epidemiology of pediatric bloodstream infections (BSIs) in Switzerland. We analyzed pathogen distribution and resistance patterns in monomicrobial and polymicrobial BSIs in children from 2008 to 2014 using data from the Swiss antibiotic resistance centre (ANRESIS). A confirmatory statistical analysis was performed comparing pathogens and resistance across 20 acute care hospitals. We identified 3,067 bacteremia episodes, of which 1,823 (59 %) were considered true BSI episodes. Overall, S...
November 24, 2016: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/27880834/overexpressed-proteins-in-hypervirulent-clade-8-and-clade-6-strains-of-escherichia-coli-o157-h7-compared-to-e-coli-o157-h7-edl933-clade-3-strain
#6
Natalia Amigo, Qi Zhang, Ariel Amadio, Qunjie Zhang, Wanderson M Silva, Baiyuan Cui, Zhongjian Chen, Mariano Larzabal, Jinlong Bei, Angel Cataldi
Escherichia coli O157:H7 is responsible for severe diarrhea and hemolytic uremic syndrome (HUS), and predominantly affects children under 5 years. The major virulence traits are Shiga toxins, necessary to develop HUS and the Type III Secretion System (T3SS) through which bacteria translocate effector proteins directly into the host cell. By SNPs typing, E. coli O157:H7 was separated into nine different clades. Clade 8 and clade 6 strains were more frequently associated with severe disease and HUS. In this study, we aimed to identify differentially expressed proteins in two strains of E...
2016: PloS One
https://www.readbyqxmd.com/read/27871251/epidemiology-and-rapd-pcr-typing-of-thermophilic-campylobacters-from-children-under-five-years-and-chickens-in-morogoro-municipality-tanzania
#7
Idrissa S Chuma, Hezron E Nonga, Robinson H Mdegela, Rudovick R Kazwala
BACKGROUND: Campylobacter species are gram negative and flagellated bacteria under the genus Campylobacter, family Campylobacteriaceae. These pathogens cause zoonotic infections among human and animal populations. This study was undertaken between December 2006 and May 2007 to determine prevalence, risk factors and genetic diversity of thermophilic Campylobacter isolates from children less than 5 years and chickens in Morogoro Municipality, Tanzania. METHODS: The Skirrow's protocol was used for isolation and identification of Campylobacter from 268 human stool specimens and 419 chicken cloacal swabs...
November 21, 2016: BMC Infectious Diseases
https://www.readbyqxmd.com/read/27866935/diarrheagenic-escherichia-coli
#8
REVIEW
Tânia A T Gomes, Waldir P Elias, Isabel C A Scaletsky, Beatriz E C Guth, Juliana F Rodrigues, Roxane M F Piazza, Luís C S Ferreira, Marina B Martinez
Most Escherichia coli strains live harmlessly in the intestines and rarely cause disease in healthy individuals. Nonetheless, a number of pathogenic strains can cause diarrhea or extraintestinal diseases both in healthy and immunocompromised individuals. Diarrheal illnesses are a severe public health problem and a major cause of morbidity and mortality in infants and young children, especially in developing countries. E. coli strains that cause diarrhea have evolved by acquiring, through horizontal gene transfer, a particular set of characteristics that have successfully persisted in the host...
November 5, 2016: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/27856044/community-fecal-carriage-of-broad-spectrum-cephalosporin-resistant-escherichia-coli-in-tunisian-children
#9
Sana Ferjani, Mabrouka Saidani, Zeineb Hamzaoui, Carla Andrea Alonso, Carmen Torres, Elaa Maamar, Amine Faouzi Slim, Ben Boubaker Ilhem Boutiba
The spread of extended spectrum β-lactamases (ESBL) and plasmid mediated AmpC β-lactamases (pAmpC) was evaluated in Escherichia coli strains collected from the intestinal microbiota of healthy children in Tunisia. The carriage rate of CTX(R)E. coli was 6.6% (7 of 105 samples) and one strain/sample was further characterized (7 isolates). These isolates harbored blaCTX-M-1 (n = 4), blaCTX-M-15 (n = 2), and blaCMY-2 gene (n = 1), which were usually located on FIB replicon type and carried class 1 integrons. The acc(6')-Ib-cr variant was identified in one isolate that harbored blaCTX-M-15...
March 8, 2016: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/27834092/urinary-tract-infection-in-childhood-and-inflammatory-markers
#10
S Tamgumus, J Geoghan, D Coghlan, M Nadeem
Acute urinary tract infections are common in children. Our aim was to establish whether peripheral blood tests correlate with urinary culture. We also examined the relationship between peripheral blood results and the length of stay (LOS) in children and adolescents with UTI. We studied 135 patients admitted with UTI, mean (SD) age 3.0 (4.1) years. Of these 135 patients, 16 (11.9%) had combined normal serum WCC, normal neutrophil count and CRP < 5 mg/L. In this group of patients, there was no significant association between LOS and serum WCC, serum neutrophil values, E...
August 8, 2016: Irish Medical Journal
https://www.readbyqxmd.com/read/27777701/the-role-of-dna-amplification-and-cultural-growth-in-complicated-acute-appendicitis
#11
Francesca Tocchioni, Chiara Tani, Laura Bartolini, Maria Moriondo, Francesco Nieddu, Patrizia Pecile, Chiara Azzari, Antonio Messineo, Marco Ghionzoli
Bacterial growth of peritoneal fluid specimens obtained during surgical procedures for acute appendicitis may be useful to optimize further antibiotic therapy in complicated cases. DNA amplification represents a fast technique to detect microbial sequences. We aimed to compare the potential of DNA amplification versus traditional bacterial growth culture highlighting advantages and drawbacks in a surgical setting. Peritoneal fluid specimens were collected during surgery from 36 children who underwent appendectomy between May and December 2012...
September 19, 2016: Pediatric Reports
https://www.readbyqxmd.com/read/27745751/province-wide-review-of-pediatric-shiga-toxin-producing-escherichia-coli-case-management
#12
Stephen B Freedman, Mohamed Eltorki, Linda Chui, Jianling Xie, Sharon Feng, Judy MacDonald, Andrew Dixon, Samina Ali, Marie Louie, Bonita E Lee, Lara Osterreicher, Jennifer Thull-Freedman
OBJECTIVE: To identify the gaps in the care of children infected with Shiga toxin-producing Escherichia coli (STEC), we sought to quantitate care received and management timelines. Such knowledge is crucial to the design of interventions to prevent the development of hemolytic uremic syndrome (HUS). STUDY DESIGN: We conducted a retrospective case-series study of 78 children infected with STEC in Alberta, Canada, through the linkage of microbiology and laboratory results, telephone health advice records, hospital charts, physician billing submissions, and outpatient antimicrobial dispensing databases...
October 10, 2016: Journal of Pediatrics
https://www.readbyqxmd.com/read/27741093/antimicrobial-resistance-among-uropathogens-that-cause-childhood-community-acquired-urinary-tract-infections-in-central-israel
#13
Renata Yakubov, Machiel van den Akker, Kaba Machamad, Amit Hochberg, Erez Nadir, Adi Klein
BACKGROUND: Empiric antibiotic treatment of urinary tract infection (UTI) in children relies on surveillance data about epidemiology and resistance patterns of common uropathogens. METHODS: A retrospective analysis of bacteria isolated from urine cultures of children with febrile UTI, seen at the pediatric department of a large regional hospital (Hillel-Yaffe Medical Center, Hadera, Israel) between January 2007 and December 2014. RESULTS: In this study period, 829 positive urine cultures were analyzed...
October 12, 2016: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/27738857/abnormal-vaginal-flora-in-symptomatic-non-pregnant-and-pregnant-women-in-a-greek-hospital-a-prospective-study
#14
G S Tansarli, T Skalidis, N J Legakis, M E Falagas
Bacterial vaginosis (BV), candidiasis, and trichomoniasis were the three established types of vaginal conditions until aerobic vaginitis (AV) was defined in the early 2000s. We sought to study the prevalence of abnormal vaginal flora (AVF) with inflammation in our hospital and to correlate it with AV. We prospectively collected vaginal smear specimens originated from symptomatic women who were examined at Iaso Obstetrics, Gynecology and Children's Hospital of Athens from April 2014 until September 2015. Amsel's criteria were used for the diagnosis of BV...
October 13, 2016: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/27733309/construction-and-immunogenic-properties-of-a-chimeric-protein-comprising-cfae-cfab-and-ltb-against-enterotoxigenic-escherichia-coli
#15
Seyed-Mohammad Gheibi Hayat, Seyed-Latif Mousavi Gargari, Shahram Nazarian
ETEC (Enterotoxigenic Escherichia coli) is a major cause of diarrhea in developing countries and children. ETEC has two virulence factors including colonization factors antigen (CFA) and labile enterotoxins (LTs). CFA/I consists the major pilin subunit CfaB and a minor adhesive subunit, CfaE. In this study a tripartite fusion protein containing CfaB, CfaE and LTB was designed. In silico analysis of the tertiary structure of the chimeric protein showed a protein with three main domains linked together with linkers...
October 9, 2016: Biologicals: Journal of the International Association of Biological Standardization
https://www.readbyqxmd.com/read/27718086/serological-and-genetic-complement-alterations-in-infection-induced-and-complement-mediated-hemolytic-uremic-syndrome
#16
Dineke Westra, Elena B Volokhina, Renate G van der Molen, Thea J A M van der Velden, Annelies Jeronimus-Klaasen, Joop Goertz, Valentina Gracchi, Eiske M Dorresteijn, Antonia H M Bouts, Mandy G Keijzer-Veen, Joanna A E van Wijk, Jaap A Bakker, Anja Roos, Lambert P van den Heuvel, Nicole C A J van de Kar
BACKGROUND: The role of complement in the atypical form of hemolytic uremic syndrome (aHUS) has been investigated extensively in recent years. As the HUS-associated bacteria Shiga-toxin-producing Escherichia coli (STEC) can evade the complement system, we hypothesized that complement dysregulation is also important in infection-induced HUS. METHODS: Serological profiles (C3, FH, FI, AP activity, C3d, C3bBbP, C3b/c, TCC, αFH) and genetic profiles (CFH, CFI, CD46, CFB, C3) of the alternative complement pathway were prospectively determined in the acute and convalescent phase of disease in children newly diagnosed with STEC-HUS or aHUS...
October 7, 2016: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
https://www.readbyqxmd.com/read/27713728/cell-free-spent-media-obtained-from-bifidobacterium-bifidum-and-bifidobacterium-crudilactis-grown-in-media-supplemented-with-3-sialyllactose-modulate-virulence-gene-expression-in-escherichia-coli-o157-h7-and-salmonella-typhimurium
#17
Pauline Bondue, Sébastien Crèvecoeur, François Brose, Georges Daube, Marie-Christine Seghaye, Mansel W Griffiths, Gisèle LaPointe, Véronique Delcenserie
Complex oligosaccharides from human milk (HMO) possess an antimicrobial activity and can promote the growth of bifidobacteria such as Bifidobacterium bifidum and Bifidobacterium longum subsp. infantis. In addition, fermentation of carbohydrates by bifidobacteria can result in the production of metabolites presenting an antivirulence effect on several pathogenic bacteria. Whey is rich in complex bovine milk oligosaccharides (BMO) structurally similar to HMO and B. crudilactis, a species of bovine origin, is able to metabolize some of those complex carbohydrates...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27701380/identification-of-helicobacter-pylori-and-the-evolution-of-an-efficacious-childhood-vaccine-to-protect-against-gastritis-and-peptic-ulcer-disease
#18
Thomas G Blanchard, Steven J Czinn
Establishment of Helicobacter pylori infection as an etiologic agent of peptic ulcer disease and other gastric pathologies marked a revolution in gastroenterology which spurred an enormous interest in gastric physiology and immunology research. The association was soon also demonstrated in children as well. Application of antimicrobial therapies have proven remarkably efficacious in eradicating H. pylori and curing pediatric patients of duodenal ulcers as well as gastritis, negating a lifetime of ineffective therapy and life-threatening disease...
October 4, 2016: Pediatric Research
https://www.readbyqxmd.com/read/27684204/community-wide-outbreak-of-haemolytic-uraemic-syndrome-associated-with-shiga-toxin-2-producing-escherichia-coli-o26-h11-in-southern-italy-summer-2013
#19
Cinzia Germinario, Alfredo Caprioli, Mario Giordano, Maria Chironna, Maria Serena Gallone, Silvio Tafuri, Fabio Minelli, Antonella Maugliani, Valeria Michelacci, Luisa Santangelo, Onofrio Mongelli, Cosimo Montagna, Gaia Scavia
In summer 2013, an excess of paediatric cases of haemolytic uraemic syndrome (HUS) in a southern region of Italy prompted the investigation of a community-wide outbreak of Shiga toxin 2-producing Escherichia coli (STEC) O26:H11 infections. Case finding was based on testing patients with HUS or bloody diarrhoea for STEC infection by microbiological and serological methods. A case-control study was conducted to identify the source of the outbreak. STEC O26 infection was identified in 20 children (median age 17 months) with HUS, two of whom reported severe neurological sequelae...
September 22, 2016: Euro Surveillance: Bulletin Européen sur les Maladies Transmissibles, European Communicable Disease Bulletin
https://www.readbyqxmd.com/read/27673470/use-of-quantitative-molecular-diagnostic-methods-to-identify-causes-of-diarrhoea-in-children-a-reanalysis-of-the-gems-case-control-study
#20
Jie Liu, James A Platts-Mills, Jane Juma, Furqan Kabir, Joseph Nkeze, Catherine Okoi, Darwin J Operario, Jashim Uddin, Shahnawaz Ahmed, Pedro L Alonso, Martin Antonio, Stephen M Becker, William C Blackwelder, Robert F Breiman, Abu S G Faruque, Barry Fields, Jean Gratz, Rashidul Haque, Anowar Hossain, M Jahangir Hossain, Sheikh Jarju, Farah Qamar, Najeeha Talat Iqbal, Brenda Kwambana, Inacio Mandomando, Timothy L McMurry, Caroline Ochieng, John B Ochieng, Melvin Ochieng, Clayton Onyango, Sandra Panchalingam, Adil Kalam, Fatima Aziz, Shahida Qureshi, Thandavarayan Ramamurthy, James H Roberts, Debasish Saha, Samba O Sow, Suzanne E Stroup, Dipika Sur, Boubou Tamboura, Mami Taniuchi, Sharon M Tennant, Deanna Toema, Yukun Wu, Anita Zaidi, James P Nataro, Karen L Kotloff, Myron M Levine, Eric R Houpt
BACKGROUND: Diarrhoea is the second leading cause of mortality in children worldwide, but establishing the cause can be complicated by diverse diagnostic approaches and varying test characteristics. We used quantitative molecular diagnostic methods to reassess causes of diarrhoea in the Global Enteric Multicenter Study (GEMS). METHODS: GEMS was a study of moderate to severe diarrhoea in children younger than 5 years in Africa and Asia. We used quantitative real-time PCR (qPCR) to test for 32 enteropathogens in stool samples from cases and matched asymptomatic controls from GEMS, and compared pathogen-specific attributable incidences with those found with the original GEMS microbiological methods, including culture, EIA, and reverse-transcriptase PCR...
September 24, 2016: Lancet
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