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https://www.readbyqxmd.com/read/28638412/molecular-identification-of-aminoglycoside-modifying-enzymes-and-plasmid-mediated-quinolone-resistance-genes-among-klebsiella-pneumoniae-clinical-isolates-recovered-from-egyptian-patients
#1
Mohamed F El-Badawy, Wael M Tawakol, Shaymaa W El-Far, Ibrahim A Maghrabi, Saleh A Al-Ghamdi, Moselhy S Mansy, Mohammed S Ashour, Mohamed M Shohayeb
Inappropriate use of antibiotics in clinical settings is thought to have led to the global emergence and spread of multidrug-resistant pathogens. The goal of this study was to investigate the prevalence of genes encoding aminoglycoside resistance and plasmid-mediated quinolone resistance among clinical isolates of Klebsiella pneumoniae. All K. pneumoniae isolates were phenotypically identified using API 20E and then confirmed genotypically through amplification of the specific K. pneumoniae phoE gene. All isolates were genotyped by the enterobacterial repetitive intergenic consensus polymerase chain reaction technique (ERIC-PCR)...
2017: International Journal of Microbiology
https://www.readbyqxmd.com/read/28605961/species-distribution-antibiotic-resistance-and-virulence-traits-in-canine-and-feline-enterococci-in-tunisia
#2
Leila Ben Said, Raoudha Dziri, Nadia Sassi, Carmen Lozano, Karim Ben Slama, Imen Ouzari, Carmen Torres, Naouel Klibi
In order to investigate the possible role of dogs and cats in the carriage and potential dissemination of resistant enterococci, seventy faecal samples from dogs and cats were tested for enterococci. Fifty-eight enterococci were recovered. Isolates were identified as Enterococcus faecium (n = 31) and E. faecalis (n = 14) E. durans (n = 6), E. casseliflavus (n = 2), E. hirae and E. gallinarum (2 isolates each). Enterococcal isolates showed resistance to ciprofloxacin (n = 35), erythromycin (n = 31), tetracycline (n = 25), kanamycin (n = 15), streptomycin (n = 13), pristinamycin (n = 11), gentamicin (n = 10), chloramphenicol (n = 8), and linezolid (n = 6)...
June 2017: Acta Veterinaria Hungarica
https://www.readbyqxmd.com/read/28589129/whole-genome-sequence-analysis-of-antimicrobial-resistance-genes-in-streptococcus-uberis-and-streptococcus-dysgalactiae-isolates-from-canadian-dairy-herds
#3
Julián Reyes Vélez, Marguerite Cameron, Juan Carlos Rodríguez-Lecompte, Fangfang Xia, Luke C Heider, Matthew Saab, J Trenton McClure, Javier Sánchez
The objectives of this study are to determine the occurrence of antimicrobial resistance (AMR) genes using whole-genome sequence (WGS) of Streptococcus uberis (S. uberis) and Streptococcus dysgalactiae (S. dysgalactiae) isolates, recovered from dairy cows in the Canadian Maritime Provinces. A secondary objective included the exploration of the association between phenotypic AMR and the genomic characteristics (genome size, guanine-cytosine content, and occurrence of unique gene sequences). Initially, 91 isolates were sequenced, and of these isolates, 89 were assembled...
2017: Frontiers in Veterinary Science
https://www.readbyqxmd.com/read/28584742/antepartum-hemorrhage-a-retrospective-analysis-from-a-northern-nigerian-teaching-hospital
#4
Idris Usman Takai, Badia Maje Sayyadi, Hadiza Shehu Galadanci
BACKGROUND: Antepartum hemorrhage (APH) contributes significantly to maternal and perinatal morbidity and mortality globally, particularly in the developing world like ours. Prevention, early detection, and prompt management cannot be overemphasized to significantly reduce the morbidity and mortality associated with this condition. OBJECTIVES: The study is aimed at determining the prevalence, etiology, sociodemographic characteristics, and the fetomaternal outcome of pregnancies complicated by APH in Aminu Kano Teaching Hospital, Kano...
April 2017: International Journal of Applied and Basic Medical Research
https://www.readbyqxmd.com/read/28577932/in-vitro-activity-of-several-antimicrobial-agents-against-methicillin-resistant-staphylococcus-aureus-mrsa-isolates-expressing-aminoglycoside-modifying-enzymes-potency-of-plazomicin-alone-and-in-combination-with-other-agents
#5
María Carmen López-Díaz, Esther Ríos, Iciar Rodríguez-Avial, Rosa Janneth Simaluiza, Juan José Picazo, Esther Culebras
This study investigated the in-vitro activity of clinically relevant aminoglycosides and new antimicrobial agents - plazomicin, ceftobiprole and dalbavancin - against 55 methicillin-resistant Staphylococcus aureus (MRSA) isolates producing aminoglycoside-modifying enzymes (AMEs). The checkerboard method was used to assess synergism between plazomicin and four antibiotics (fosfomycin, ceftobiprole, cefoxitin and meropenem), and time-kill assays were performed for the most active combinations. Among the aminoglycosides tested, plazomicin was the most active agent against MRSA, with >90% of isolates being inhibited at a minimum inhibitory concentration (MIC) of ≤1 mg/L...
May 31, 2017: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/28575064/antimicrobial-resistance-of-klebsiella-pneumoniae-stool-isolates-circulating-in-kenya
#6
Chris Rowe Taitt, Tomasz A Leski, Daniel P Erwin, Elizabeth A Odundo, Nancy C Kipkemoi, Janet N Ndonye, Ronald K Kirera, Abigael N Ombogo, Judd L Walson, Patricia B Pavlinac, Christine Hulseberg, Gary J Vora
We sought to determine the genetic and phenotypic antimicrobial resistance (AMR) profiles of commensal Klebsiella spp. circulating in Kenya by testing human stool isolates of 87 K. pneumoniae and three K. oxytoca collected at eight locations. Over one-third of the isolates were resistant to ≥3 categories of antimicrobials and were considered multidrug-resistant (MDR). We then compared the resistance phenotype to the presence/absence of 238 AMR genes determined by a broad-spectrum microarray and PCR. Forty-six genes/gene families were identified conferring resistance to β-lactams (ampC/blaDHA, blaCMY/LAT, blaLEN-1, blaOKP-A/OKP-B1, blaOXA-1-like family, blaOXY-1, blaSHV, blaTEM, blaCTX-M-1 and blaCTX-M-2 families), aminoglycosides (aac(3)-III, aac(6)-Ib, aad(A1/A2), aad(A4), aph(AI), aph3/str(A), aph6/str(B), and rmtB), macrolides (mac(A), mac(B), mph(A)/mph(K)), tetracyclines (tet(A), tet(B), tet(D), tet(G)), ansamycins (arr), phenicols (catA1/cat4, floR, cmlA, cmr), fluoroquinolones (qnrS), quaternary amines (qacEΔ1), streptothricin (sat2), sulfonamides (sul1, sul2, sul3), and diaminopyrimidines (dfrA1, dfrA5, dfrA7, dfrA8, dfrA12, dfrA13/21/22/23 family, dfrA14, dfrA15, dfrA16, dfrA17)...
2017: PloS One
https://www.readbyqxmd.com/read/28569134/incidence-and-outcome-of-severe-ante-partum-hemorrhage-at-the-teaching-hospital-yalgado-ou%C3%A3-draogo-in-burkina-faso
#7
Martin Lankoande, Papougnezambo Bonkoungou, Sosthène Ouandaogo, Marcelin Dayamba, Ali Ouedraogo, Francis Veyckmans, Nazinigouba Ouédraogo
BACKGROUND: Hemorrhage is the main cause of maternal death during pregnancy. This study aims to evaluate incidence and outcomes of Severe Ante Partum Hemorrhage (SAPH) during the third trimester of pregnancy prior to delivery. METHODS: Analytical cross-sectional study with prospective data collection during 12 months in Yalgado Ouedraogo Hospital, Ouagadougou, Burkina Faso. In this context SAPH is specifically referring to Ante Partum Hemorrhage (APH) and Intra Partum Hemorrhage (IPH) in the 3rd trimester...
May 31, 2017: BMC Emergency Medicine
https://www.readbyqxmd.com/read/28483962/comparative-analysis-of-extended-spectrum-beta-lactamase-ctx-m-65-producing-salmonella-infantis-isolates-from-humans-food-animals-and-retail-chickens-in-the-united-states
#8
Heather Tate, Jason P Folster, Chih-Hao Hsu, Jessica Chen, Maria Hoffmann, Cong Li, Cesar Morales, Gregory H Tyson, Sampa Mukerjee, Allison C Brown, Alice Green, Wanda Wilson, Uday Dessai, Jason Abbott, Lavin Joseph, Jovita Haro, Sherry Ayers, Patrick F McDermott, Shaohua Zhao
We sequenced the genomes of ten Salmonella enterica serovar Infantis containing blaCTX-M-65 isolated from chicken, cattle, and human sources collected between 2012 and 2015 in the United States through routine NARMS surveillance and product sampling programs. We also completely assembled the plasmids from four of the isolates. All isolates had a D87Y mutation in the gyrA gene and harbored between 7 and 10 resistance genes (aph (4)-Ia, aac (3)-IVa, aph(3' )-Ic, blaCTX-M-65, fosA3, floR, dfrA14, sul1, tetA, aadA1) located in two distinct sites of a megaplasmid (∼316-323kb) similar to that described in a blaCTX-M-65-positive S...
May 8, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28450554/biodistribution-pharmacokinetics-and-dosimetry-of-177-lu-90-y-and-111-in-labeled-somatostatin-receptor-antagonist-ops201-in-comparison-to-the-agonist-177-lu-dota-tate-the-mass-effect
#9
Guillaume Pierre Nicolas, Rosalba Mansi, Lisa McDougall, Jens Kaufmann, Hakim Bouterfa, Damian Wild, Melpomeni Fani
Radiolabeled somatostatin receptor (sstr) antagonists have shown in vivo higher uptake in sstr-expressing tumors than agonists. In this pre-clinical study the sstr2-antagonist OPS201 (DOTA-JR11; DOTA-[Cpa-c(DCys-Aph(Hor)-DAph(Cbm)-Lys-Thr-Cys)-DTyr-NH2]) labeled with (177)Lu, (90)Y and (111)In was compared with the sstr2-agonist (177)Lu-DOTA-TATE. Methods: Biodistribution, pharmacokinetics, single-photon emission computed tomography/computed tomography (SPECT/CT) and dosimetry studies were performed to assess the bioequivalence of all radiotracers...
April 27, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28413506/active-efflux-pump-adeb-is-involved-in-multidrug-resistance-of-acinetobacter-baumannii-induced-by-antibacterial-agents
#10
Tingting Zhang, Min Wang, Yixin Xie, Xianping Li, Zhihui Dong, Yanhua Liu, Ling Wang, Min Yang, Huan Song, Hong Cao, Wei Cao
The aim of the present study was to investigate the resistance of Acinetobacter baumannii, which was induced by cefepime (FEP), cefoperazone-sulbactam (SCF), tazobactam (TZP), levofloxacin (LEV), amikacin (AK), imipenem (IPM), and ciprofloxacin (CIP), in vitro. Multi-step drug resistance selection of 16 A. baumannii strains was performed using seven antibacterial agents (FEP, TZP, CIP, AK, IPM, SCF, and LEV). The minimum inhibitory concentration (MIC) was determined using the agar dilution method. Random amplified polymorphic DNA polymerase chain reaction was performed to analyze the genotypes and the carrying rates of aac(3)-I, aac(6')-I, ant(3)-I, aph(3)-Via, OXA-23, OXA-24, AmpC, TEM-1, metallo-β-lactamase gene (IMP), armA, rmtA, rmtB, parC, gyrA and adeB...
April 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28395597/genome-sequencing-and-comparative-analysis-of-an-ndm-1-producing-klebsiella-pneumoniae-st15-isolated-from-a-refugee-patient
#11
Tamara Salloum, Harout Arabaghian, Sahar Alousi, Edmond Abboud, Sima Tokajian
The escalating problem of antibiotic resistance, specifically cabarpenemase and extended-spectrum β-lacatamase (ESBL) producing K. pneumoniae strains, is directly correlated with increased patient morbidity and mortality and prolonged hospitalization and costs. In this study, a comprehensive genomic analysis encompassing the resistomics, virulence repertoire and mobile genetic elements of an NDM-1 positive ESBL-producing K. pneumoniae EA-MEH ST15 isolated from a urine sample collected from a Syrian refugee was conducted...
April 11, 2017: Pathogens and Global Health
https://www.readbyqxmd.com/read/28373209/fludarabine-resistance-mediated-by-aminoglycoside-3-phosphotransferase-iia-and-the-structurally-related-eukaryotic-camp-dependent-protein-kinase
#12
Dámaso Sánchez-Carrera, Sara Bravo-Navas, Elena Cabezón, Ignacio Arechaga, Matilde Cabezas, Lucrecia Yáñez, Carlos Pipaón
While working with G418-resistant stably transfected cells, we realized the neomycin resistance gene (NeoR), which encodes the aminoglycoside-3'-phosphotransferase-IIa [APH(3')-IIa], also confers resistance to the nucleoside analog fludarabine. Fludarabine is a cytostatic drug widely used in the treatment of hematologic and solid tumors as well as in the conditioning of patients before transplantation of hematopoietic progenitors. We present evidence that NeoR-transfected cells do not incorporate fludarabine, thus avoiding DNA damage caused by the drug, evidenced by a lack of FANCD2 monoubiquitination and impaired apoptosis...
April 3, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28352950/effect-of-threshold-growth-as-a-major-feature-on-li-rads-categorization
#13
Victoria Chernyak, Mariya Kobi, Milana Flusberg, Kate C Fruitman, Claude B Sirlin
PURPOSE: Liver Imaging Reporting and Data System (LI-RADS) uses major features (arterial phase hyperenhancement [APHE], "washout" [WO], "capsule," diameter, threshold growth [TG]) to codify probability of hepatocellular carcinoma for each observation. This study assessed the effect of removing TG as a major feature on LI-RADS categorization. MATERIALS AND METHODS: In this HIPAA-compliant, IRB-approved study, all MR and CT clinical reports containing a standardized LI-RADS v2014 template between 4/15-1/17 were retrospectively reviewed for each LR-3, LR-4, and LR-5 reported observation...
March 28, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28339104/transferable-antibiotic-resistances-in-marketed-edible-grasshoppers-locusta-migratoria-migratorioides
#14
Andrea Osimani, Cristiana Garofalo, Lucia Aquilanti, Vesna Milanović, Federica Cardinali, Manuela Taccari, Marina Pasquini, Stefano Tavoletti, Francesca Clementi
Grasshoppers are the most commonly eaten insects by humans worldwide, as they are rich in proteins and micronutrients. This study aimed to assess the occurrence of transferable antibiotic resistance genes in commercialized edible grasshoppers. To this end, the prevalence of 12 selected genes [aac(6')-Ie aph(2″)-Ia, blaZ, erm(A), erm(B), erm(C), mecA, tet(M), tet(O), tet(S), tet(K), vanA, vanB] coding for resistance to antibiotics conventionally used in clinical practice was determined. The majority of samples were positive for tet(M) (70...
May 2017: Journal of Food Science
https://www.readbyqxmd.com/read/28324643/unsymmetrical-iron-p-nh-p-catalysts-for-the-asymmetric-pressure-hydrogenation-of-aryl-ketones
#15
Samantha A M Smith, Paraskevi O Lagaditis, Anne Lüpke, Alan J Lough, Robert H Morris
The reductive amination of α-dialkylphosphine acetaldehydes with enantiopure β-aminophosphines is a new, versatile route to unsymmetrical tridentate (pincer) ligands P-NH-P'. Four new ligands PR2 CH2 CH2 NHCHR'CHR''PPh2 (R=iPr, Cy, R'=Ph, CH(CH3 )2 , R''=Ph, H) prepared in this way are used to make the iron(II) complexes mer-FeCl2 (CO)(P-NH-P') and mer-FeCl(H)(CO)(P-NH-P'). The hydride complex with the rigid ligand with R'=R''=Ph is an efficient and highly enantioselective homogeneous asymmetric pressure hydrogenation (APH) catalyst...
March 21, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28302486/mitochondria-are-devoid-of-amyloid-%C3%AE-protein-a%C3%AE-producing-secretases-evidence-for-unlikely-occurrence-within-mitochondria-of-a%C3%AE-generation-from-amyloid-precursor-protein
#16
Naomi Mamada, Daisuke Tanokashira, Kazuhiro Ishii, Akira Tamaoka, Wataru Araki
Mitochondrial dysfunction is implicated in the pathological mechanism of Alzheimer's disease (AD). Amyloid β-protein (Aβ), which plays a central role in AD pathogenesis, is reported to accumulate within mitochondria. However, a question remains as to whether Aβ is generated locally from amyloid precursor protein (APP) within mitochondria. We investigated this issue by analyzing the expression patterns of APP, APP-processing secretases, and APP metabolites in mitochondria separated from human neuroblastoma SH-SY5Y cells and those expressing Swedish mutant APP...
April 29, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28270117/antepartum-complications-and-perinatal-mortality-in-rural-bangladesh
#17
Rasheda Khanam, Saifuddin Ahmed, Andreea A Creanga, Nazma Begum, Alain K Koffi, Arif Mahmud, Heather Rosen, Abdullah H Baqui
BACKGROUND: Despite impressive improvements in maternal survival throughout the world, rates of antepartum complications remain high. These conditions also contribute to high rates of perinatal deaths, which include stillbirths and early neonatal deaths, but the extent is not well studied. This study examines patterns of antepartum complications and the risk of perinatal deaths associated with such complications in rural Bangladesh. METHODS: We used data on self-reported antepartum complications during the last pregnancy and corresponding pregnancy outcomes from a household survey (N = 6,285 women) conducted in Sylhet district, Bangladesh in 2006...
March 7, 2017: BMC Pregnancy and Childbirth
https://www.readbyqxmd.com/read/28264854/high-prevalence-and-predominance-of-the-aph-2%C3%A2-if-gene-conferring-aminoglycoside-resistance-in-campylobacter
#18
Hong Yao, Dejun Liu, Yang Wang, Qijing Zhang, Zhangqi Shen
Campylobacter is a major foodborne pathogen, and previous studies revealed that Campylobacter isolates from food-producing animals are increasingly resistant to gentamicin in China. The molecular epidemiology and genetic mechanisms responsible for gentamicin resistance in China have not been well understood. In this study, 607 Campylobacter isolates of chicken and swine origins collected in 2014 were analyzed, revealing that 15.6% (25/160) of the Campylobacter jejuni isolates and 79.9% (357/447) of the Campylobacter coli isolates were resistant to gentamicin...
May 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28260587/antimicrobial-resistant-escherichia-coli-and-enterococcus-spp-isolated-from-miranda-donkey-equus-asinus-an-old-problem-from-a-new-source-with-a-different-approach
#19
Isabel Carvalho, Rosa Del Campo, Margarida Sousa, Nuno Silva, João Carrola, Catarina Marinho, Tiago Santos, Sílvia Carvalho, Miguel Nóvoa, Miguel Quaresma, José Eduardo Pereira, Marta Cobo, Gilberto Igrejas, Patrícia Poeta
PURPOSE: The Miranda donkey (Equus asinus) is an endangeredasinine from Miranda do Douro region, located in the north east of Portugal. We studied the antimicrobial resistance and virulence genes in Escherichia coli and Enterococcus spp. isolates from these animals. METHODOLOGY: In March 2014, a total of 66 faecal samples were recovered from independent animals. Antibiotic resistance was determined by the disc diffusion method. Carriage of genes coding for antibiotic-resistant and virulent factors was analysed by PCR...
March 2017: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28187245/molecular-phylogeny-and-ultrastructure-of-aphelidium-desmodesmi-a-new-species-in-aphelida-opisthosporidia
#20
Peter M Letcher, Martha J Powell, Philip A Lee, Salvador Lopez, Micheal Burnett
Aphelids are a diverse group of intracellular parasitoids of algae and diatoms, and are sister to true fungi. Included in four genera, the 14 described species utilize phagocytosis as their mode of nutrition, and the life cycles of these taxa are remarkably similar. However, their putative specificity of host, morphological and ultrastructural features, and genetic divergence have been considered in taxon delineation. Here we examine the host specificity, morphology, ultrastructure, and molecular 18S gene sequence of a new species in Aphelida, Aphelidium desmodesmi sp...
February 10, 2017: Journal of Eukaryotic Microbiology
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