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https://www.readbyqxmd.com/read/28526638/prevalence-and-antimicrobial-susceptibility-of-salmonella-and-shigella-spp-among-children-with-gastroenteritis-in-an-iranian-referral-hospital
#1
Shima Mahmoudi, Babak Pourakbari, Mina Moradzadeh, Hamid Eshaghi, Amitis Ramezani, Mohammad Taghi Haghi Ashtiani, Sepideh Keshavarz Valian, Setareh Mamishi
BACKGROUND: Gastroenteritis is one of the leading cause of illnesses through the world, especially in developing countries.Salmonella and Shigella infections are considered as the main public health problems in children. The aim of this study was to detect the prevalence and antimicrobial susceptibility of Salmonella and Shigella spp. among children with gastroenteritis in an Iranian referral hospital. METHODS: During April 2013 to April 2014, all medical records of children with gastroenteritis admitted to a pediatric medical center were evaluated...
May 16, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28524864/mistranslation-can-enhance-fitness-through-purging-of-deleterious-mutations
#2
Sinisa Bratulic, Macarena Toll-Riera, Andreas Wagner
Phenotypic mutations are amino acid changes caused by mistranslation. How phenotypic mutations affect the adaptive evolution of new protein functions is unknown. Here we evolve the antibiotic resistance protein TEM-1 towards resistance on the antibiotic cefotaxime in an Escherichia coli strain with a high mistranslation rate. TEM-1 populations evolved in such strains endow host cells with a general growth advantage, not only on cefotaxime but also on several other antibiotics that ancestral TEM-1 had been unable to deactivate...
May 19, 2017: Nature Communications
https://www.readbyqxmd.com/read/28508419/case-control-study-shows-that-neonatal-pneumococcal-meningitis-cannot-be-distinguished-from-group-b-streptococcus-cases
#3
Alexandra Arfi, Robert Cohen, Emmanuelle Varon, Stéphane Béchet, Stéphane Bonacorsi, Corinne Levy
AIM: Streptococcus pneumoniae (S. pneumoniae) is sometimes implicated in neonatal bacterial meningitis. This study described the demographic, clinical and biological features of neonatal S. pneumoniae meningitis and compared pneumococcal and group B streptococcal (GBS) neonatal meningitis. METHODS: We conducted a case-control study that compared neonates, aged one to 28 days with S. pneumoniae meningitis or GBS meningitis. Each case with S. pneumoniae was randomly matched to four control patients with GBS by age group and study year...
May 16, 2017: Acta Paediatrica
https://www.readbyqxmd.com/read/28506272/prevalence-and-clonal-relationship-of-esbl-producing-salmonella-strains-from-humans-and-poultry-in-northeastern-algeria
#4
Samia Djeffal, Sofiane Bakour, Bakir Mamache, Rachid Elgroud, Amir Agabou, Selma Chabou, Sana Hireche, Omar Bouaziz, Kheira Rahal, Jean-Marc Rolain
BACKGROUND: The aims of this study were to investigate Salmonella contamination in broiler chicken farms and slaughterhouses, to assess the antibiotic resistance profile in avian and human Salmonella isolates, and to evaluate the relationship between avian and human Extended Spectrum β-Lactamase (ESBL)-producing isolates. Salmonella was screened in different sample matrices collected at thirty-two chicken farms and five slaughterhouses. The human isolates were recovered from clinical specimens at the University Teaching Hospital of Constantine (UTH)...
May 15, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/28497052/etiological-and-resistance-profile-of-bacteria-involved-in-urinary-tract-infections-in-young-children
#5
Antonio Sorlózano-Puerto, José María Gómez-Luque, Juan de Dios Luna-Del-Castillo, José María Navarro-Marí, José Gutiérrez-Fernández
Background. The objective of this study was to identify the bacteria most frequently responsible for urinary tract infection (UTI) in the population of under-2-year-olds in our geographic area and to evaluate the activity of antibiotics widely used for UTI treatment during a 4-year study period. Materials and Methods. A retrospective analysis was conducted of data on the identification and susceptibility of microorganisms isolated in urine samples from children under 2 years of age. Results. A total of 1,045 uropathogens were isolated...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28489191/pathogenic-vibrio-species-isolated-from-estuarine-environments-cear%C3%A3-brazil-antimicrobial-resistance-and-virulence-potential-profiles
#6
Francisca G R DE Menezes, Marina T T Rodriguez, Fátima C T DE Carvalho, Rosa H Rebouças, Renata A Costa, Oscarina V DE Sousa, Ernesto Hofer, Regine H S F Vieira
Detection of virulent strains associated with aquatic environment is a current concern for the management and control of human and animal health. Thus, Vibrio diversity was investigated in four estuaries from state of Ceará (Pacoti, Choró, Pirangi and Jaguaribe) followed by antimicrobial susceptibility to different antimicrobials used in aquaculture and detection of main virulence factors to human health. Isolation and identification were performed on TCBS agar (selective medium) and dichotomous key based on biochemical characteristics, respectively...
April 27, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28483958/new-aspects-of-the-interplay-between-penicillin-binding-proteins-murm-and-the-two-component-system-ciarh-of-penicillin-resistant-streptococcus-pneumoniae-serotype-19a-isolates-from-hungary
#7
Inga Schweizer, Sebastian Blättner, Patrick Maurer, Katharina Peters, Daniela Vollmer, Waldemar Vollmer, Regine Hakenbeck, Dalia Denapaite
The Streptococcus pneumoniae clone Hungary(19A)-6 can expresses unusually high levels of β-lactam resistance which is in part due to mutations in the MurM gene encoding a transferase involved in the synthesis of branched peptidoglycan. Moreover it contains the allele ciaH232 encoding the histidine kinase CiaH (M Müller, P Marx, R Hakenbeck, and R Brückner, Microbiology 157:3104-12, 2011, doi: 10.1099/mic.0.053157-0). High-level penicillin resistance primarily requires the presence of low-affinity (mosaic) PBP genes as, for example, in strain Hu17, a closely related member of the Hungary(19A)-6 lineage...
May 8, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28465825/investigation-of-antimicrobial-use-at-a-tertiary-care-hospital-in-southern-punjab-pakistan-using-who-methodology
#8
Muhammad Atif, Muhammad Azeem, Anum Saqib, Shane Scahill
BACKGROUND: Globally, between 20 to 50% of antimicrobial consumption is inappropriate, causing significant impact on the quality of care, cost of therapy and incidence of adverse drug reactions. The purpose of this study was to investigate the prescribing patterns and utilization of antimicrobials in ten selected wards at Bahawal Victoria Hospital (BVH), Bahawalpur, Punjab, Pakistan. METHODS: A descriptive cross-sectional study was designed using the World Health Organization (WHO) indicators for antimicrobial use...
2017: Antimicrobial Resistance and Infection Control
https://www.readbyqxmd.com/read/28465811/frequency-of-extended-spectrum-beta-lactamases-esbls-in-strains-of-klebsiella-and-e-coli-isolated-from-patients-hospitalized-in-yazd
#9
Hengameh Zandi, Seyed Mostafa Tabatabaei, Fatemeh Ehsani, Mojtaba Babaei Zarch, Samira Doosthosseini
INTRODUCTION: Frequency of extended-spectrum beta-lactamases (ESBLs) and its variants may vary in different geographical areas, as reports indicate their spread in some certain communities. The aim of this study was to determine the frequency of ESBLs in strains of Klebsiella and E. coli, isolated from patients hospitalized in teaching hospitals of Yazd. METHODS: This cross-sectional study was carried out on samples including E. coli and Klebsiella strains collected from laboratories of Shahid Sadoughi and Shahid Rahnemoun hospitals in Yazd, Iran in the period of 2011-2012...
February 2017: Electronic Physician
https://www.readbyqxmd.com/read/28463778/detection-of-molecular-changes-induced-by-antibiotics-in-escherichia-coli-using-vibrational-spectroscopy
#10
N T Xuan Nguyen, Samira Sarter, N Hai Nguyen, Philippe Daniel
This study aimed to test Raman (400-1800cm(-1)) and Infra-red (1900-500cm(-1)) spectroscopies followed by statistical analysis (principal component analysis) to detect molecular changes induced by antibiotics (ampicillin, cefotaxime - cell wall synthesis inhibitors, tetracycline - protein synthesis inhibitor, ciprofloxacin - DNA synthesis inhibitor) against Escherichia coli TOP10. In case of ampicillin and cefotaxime, a decrease in protein bands in both Raman (1240, 1660cm(-1)), and IR spectra (1230, 1530, 1630cm(-1)), and an increase in carbohydrate bands (1150, 1020cm(-1)) in IR spectra were observed...
April 27, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28450661/prevalence-and-molecular-characterization-of-extended-spectrum-%C3%AE-lactamase-esbl-and-plasmidic-ampc-%C3%AE-lactamase-pampc-producing-escherichia-coli-in-dogs
#11
Özkan Aslantas, Ebru Sebnem Yilmaz
This study aimed to determine the prevalence of fecal carriage of extended spectrum β-lactamase (ESBL) and/or plasmidic AmpC β-lactamase (pAmpC) producing Escherichia coli among dogs (n=428) in Turkey. Polymerase chain reaction (PCR) and sequencing were used to characterize genes encoding β-lactamase genes and plasmid mediated quinolone resistance (PMQR). Antimicrobial susceptibility testing and PCRs for virulence genes and phylogenetic groups were also performed. Cefotaxime resistant E. coli isolates were detected in 95 (22...
April 27, 2017: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/28449875/development-and-validation-of-a-quantitative-confirmatory-method-for-30-%C3%AE-lactam-antibiotics-in-bovine-muscle-using-liquid-chromatography-coupled-to-tandem-mass-spectrometry
#12
M Di Rocco, M Moloney, T O'Beirne, S Earley, B Berendsen, A Furey, M Danaher
A method was developed for the confirmatory and quantitative analysis of 30 β-lactam antibiotic residues in bovine muscle. The method includes 12 penicillins (amoxicillin, ampicillin, cloxacillin, dicloxacillin, mecillinam, methicillin, nafcillin, oxacillin, penicillin G, penicillin V, piperacillin, ticarcillin), 12 cephalosporins (cefacetrile, cefadroxil, cephalexin, cefalonium, cefazolin, cefoperazone, cefotaxime, cefquinome, cefuroxime, desacetyl cephapirin, desfuroylceftiofur cysteine disulfide, desfuroylceftiofur dimer), five carbapenems (biapenem, doripenem, ertapenem, imipenem, meropenem) and faropenem...
April 12, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28446488/eculizumab-in-a-child-with-atypical-haemolytic-uraemic-syndrome-and-haemophagocytic-lymphohistiocytosis-triggered-by-cytomegalovirus-infection
#13
Gloria M Fraga-Rodriguez, Sonia Brió-Sanagustin, Eulalia Turón-Viñas, Bradley P Dixon, Eduardo Carreras-González
We present the case of a 21-month-old girl with two rare and life-threatening conditions, atypical haemolytic uraemic syndrome (aHUS) and haemophagocytic lymphohistiocytosis (HLH), triggered by a cytomegalovirus (CMV) infection. Soon after admission, the girl became anuric and required continuous venovenous haemodiafiltration.Initial treatments included methylprednisolone, fibrinogen and plasma infusion (for HLH), plasmapheresis (for thrombotic microangiopathy), immunoglobulins (for inflammation), ganciclovir (for CMV infection) and the antibiotic cefotaxime...
April 26, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28445079/multiple-antimicrobial-resistance-and-novel-point-mutation-in-fluoroquinolone-resistant-escherichia-coli-isolates-from-mangalore-india
#14
Santhosh Kogaluru Shivakumaraswamy, Deekshit Vijaya Kumar, Venugopal Moleyuru Nagarajappa, Iddya Karunasagar, Indrani Karunasagar
Fluoroquinolone resistance in bacteria is usually associated with mutations in the topoisomerase regions. We report a novel point mutation in fluoroquinolone-resistant Escherichia coli strains. E. coli isolated from the environment in and around Mangalore, India, were examined for their antimicrobial resistance profile to 12 antibiotics and for the antibiotic resistance genes by polymerase chain reaction. Of the 67 E. coli isolated, 24 (35.8%) were sensitive to all antibiotics and 43 (64.2%) showed resistance to at least one of the 12 antibiotics used in the study...
April 26, 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/28444315/towards-the-early-detection-of-%C3%AE-lactamase-producing-enterobacteriaceae-by-maldi-tof-ms-analysis
#15
Marina Oviaño, Marta Gómara, Maria José Barba, María José Revillo, Luis Pedro Barbeyto, Germán Bou
Objectives: Development of a novel MALDI-TOF MS-based method for the rapid detection of ESBL-producing Enterobacteriaceae. Methods: The method was evaluated in terms of sensitivity, specificity and turnaround time regarding the antibiotic used (cefotaxime, ceftazidime, ceftriaxone, cefpodoxime or cefepime) and the performance of the automated MBT STAR-BL software (Bruker Daltonik GmbH, Germany) relative to qualitative interpretation of spectra for detecting β-lactamase resistance by MALDI-TOF MS (Bruker Daltonik) in a collection of 11 isogenic Escherichia coli control strains expressing different β-lactamases...
April 24, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28439602/antibiogram-profile-of-septic-meningitis-among-children-in-duhok-iraq
#16
Abdulrahman T Saadi, Nadir A Garjees, Aveen H Rasool
  To determine the prevalence of bacteria in the cerebrospinal fluid (CSF), and the antibiogram profile in pediatric patients with suspected meningitis. Methods: This descriptive study was conducted between January 2014 and January 2016 in the Hevi Paediatric Teaching Hospital in Duhok, Iraq. The CSF samples were withdrawn from 432 pediatric patients suspected of meningitis. The samples were cultured, and antibiotic sensitivity tests were performed.  Results: There were 33 (7.6%) culture positive cases among 432 CSF samples...
May 2017: Saudi Medical Journal
https://www.readbyqxmd.com/read/28439301/prevalence-virulence-potential-and-pulsed-field-gel-electrophoresis-profiling-of-shiga-toxin-producing-escherichia-coli-strains-from-cattle
#17
Hee-Jin Dong, Soomin Lee, Woohyun Kim, Jae-Uk An, Junhyung Kim, Danil Kim, Seongbeom Cho
BACKGROUND: As a primary source of Shiga-toxin-producing Escherichia coli (STEC) infection, cattle are often targeted to develop strategies for reducing STEC contamination. Monitoring the virulence potentials of STEC isolates from cattle is important for tracing contamination sources, managing outbreaks or sporadic cases, and reducing the risks for human infection. This study aimed to investigate the prevalence of STEC in cattle farm samples in South Korea and to assess their virulence potentials...
2017: Gut Pathogens
https://www.readbyqxmd.com/read/28438925/identification-of-mycobacterial-genes-involved-in-antibiotic-sensitivity-implications-in-the-treatment-of-tuberculosis-with-%C3%AE-lactam-containing-regimens
#18
Gopinath Viswanathan, Sangya Yadav, Tirumalai R Raghunand
In a Mycobacterium smegmatis mutant library screen, transposon mutants with insertions in fhaA, dprE2, rpsT and parA, displayed hypersusceptibility to antibiotics including the β-lactams meropenem, ampicillin, amoxicillin and cefotaxime. Sub MIC levels of octoclothepin, a psychotic drug inhibiting ParA, phenocopied the parA insertion and enhanced the bactericidal activity of meropenem against Mycobacteriumtuberculosis in combination with clavulanate. Our study identifies novel factors associated with antibiotic resistance, with implications in repurposing β-lactams for tuberculosis treatment...
April 24, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28437226/first-report-of-prevalence-of-ctx-m-15-producing-escherichia-coli-o25b-st131-from-iran
#19
Mohammad Hasan Namaei, Masoud Yousefi, Masoud Ziaee, Alireza Salehabadi, Malaknaz Ghannadkafi, Elham Amini, Parvin Askari
The emergence of Escherichia coli sequence type 131 (ST131) as a multidrug-resistant and virulent pathogen represents a major challenge to public health globally. Recently, the O25b/ST131 E. coli producing CTX-M-15 with high virulence potential has been reported worldwide, but has received little attention in Iran. This study is the first in Iran to specifically determine the spread of the O25b/ST131 clone producing CTX-M-15 among E. coli isolates belonging to the B2 phylogenetic group. ST131 clone in phylogenetic group B2 was detected based on PCR detection of ST131-specific single-nucleotide polymorphisms in mdh and gyrB...
February 16, 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/28435191/occurrence-of-multidrug-resistant-escherichia-coli-in-groundwater-of-brij-region-uttar-pradesh-and-its-public-health-implications
#20
Barkha Sharma, Parul, A K Verma, Udit Jain, Janaradan K Yadav, Ravneet Singh, Raghvendra Mishra
AIM: The study evaluates the microbial as well as physicochemical pollution of groundwater of Brij region of Uttar Pradesh, a major tourist destination in the country along with estimating the drug resistance evident in the isolated Escherichia coli. MATERIALS AND METHODS: A total of 60 samples of groundwater were collected from six different sites and assessed for physicochemical (pH, color, taste, turbidity, total dissolved solids [TDS], total hardness [TH], chlorides, fluorides, nitrates, and iron) and microbiological parameters (standard plate count [SPC], most probable number test [MPN], E...
March 2017: Veterinary World
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