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https://www.readbyqxmd.com/read/28319520/infections-in-patients-with-a-total-artificial-heart-are-common-but-rarely-fatal
#1
Luis F Hidalgo, Keyur B Shah, Richard H Cooke, Daniel G Tang, Vigneshwar Kasirajan, Howard A Cooper, Wilbert S Aronow
Patients who received a total artificial heart (TAH) at Virginia Commonwealth University (VCU) between January 1, 2010 and December 31, 2011 were identified from the VCU Mechanical Circulatory Support Clinical Database. Retrospective data extraction from the medical records was performed from the time of TAH implantation until heart transplantation or death. Infections were classified as confirmed or suspected. Twenty-seven men and 5 women, mean age 49.5 years (range 24 to 68 years) received a TAH. The mean duration of TAH support was 225 days (range 1 to 1334 days)...
March 17, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28303831/strengths-and-limitations-of-various-screening-methods-for-carbapenem-resistant-enterobacteriaceae-including-new-method-recommended-by-clinical-and-laboratory-standards-institute-2017-a-tertiary-care-experience
#2
Agila Kumari Pragasam, Balaji Veeraraghavan, Yamuna Devi Bakthavatchalam, Radha Gopi, Raziya Fathima Aslam
Carbapenemase-mediated carbapenem resistance is a major concern across the world. Rapid detection of carbapenemase-producing organisms is of great importance in clinical settings. However, it is essential to have a test with good sensitivity and specificity. The aim of the study was to compare the performance of RAPIDEC® CARBA NP and modified carbapenem inactivation method (mCIM) recommended by Clinical and Laboratory Standards Institute guideline 2017. A total of ninety carbapenem resistant Escherichia coli and Klebsiella pneumoniae have been tested...
January 2017: Indian Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28300698/antibacterial-screening-of-rumex-species-native-to-the-carpathian-basin-and-bioactivity-guided-isolation-of-compounds-from-rumex-aquaticus
#3
Orsolya Orbán-Gyapai, Erika Liktor-Busa, Norbert Kúsz, Dóra Stefkó, Edit Urbán, Judit Hohmann, Andrea Vasas
Plants belonging to the genus Rumex (family Polygonaceae) are used worldwide in traditional medicine for the treatment of various diseases caused by different microorganisms (e.g. bacteria-related dermatologic conditions, dysentery and enteritis). The present study focused on the antibacterial screening of Rumex species native to the Carpathian Basin, and isolation of compounds from one of the most efficient species, Rumex aquaticus. The antibacterial effects of n-hexane, chloroform and aqueous fractions of methanol extracts prepared from different parts of 14 Rumex species (R...
March 11, 2017: Fitoterapia
https://www.readbyqxmd.com/read/28299769/the-effect-of-urinary-catheters-on-microbial-biofilms-and-catheter-associated-urinary-tract-infections
#4
Sahra Kirmusaoglu, Seyhun Yurdugül, Ahmet Metin, Suphi Vehid
PURPOSE: The aims of this study were to determine relationship between biofilm producer microorganisms attached to urinary catheters (UCs) and urinary catheter-associated urinary tract infections (CAUTIs), to determine the rate of CAUTI development and the relationship between CAUTI and catheterization period in catheterized patients. MATERIALS AND METHODS: Urinary catheters from 143 inpatients who were hospitalized in Abant Izzet Baysal University Hospital Urinary Service, and urine samples of these patients before and after catheterization of urinarycatheter were collected...
March 16, 2017: Urology Journal
https://www.readbyqxmd.com/read/28298903/apoptosis-toll-like-rig-i-like-and-nod-like-receptors-are-pathways-jointly-induced-by-diverse-respiratory-bacterial-and-viral-pathogens
#5
Isidoro Martínez, Juan C Oliveros, Isabel Cuesta, Jorge de la Barrera, Vicente Ausina, Cristina Casals, Alba de Lorenzo, Ernesto García, Belén García-Fojeda, Junkal Garmendia, Mar González-Nicolau, Alicia Lacoma, Margarita Menéndez, David Moranta, Amelia Nieto, Juan Ortín, Alicia Pérez-González, Cristina Prat, Elisa Ramos-Sevillano, Verónica Regueiro, Ariel Rodriguez-Frandsen, Dolores Solís, José Yuste, José A Bengoechea, José A Melero
Lower respiratory tract infections are among the top five leading causes of human death. Fighting these infections is therefore a world health priority. Searching for induced alterations in host gene expression shared by several relevant respiratory pathogens represents an alternative to identify new targets for wide-range host-oriented therapeutics. With this aim, alveolar macrophages were independently infected with three unrelated bacterial (Streptococcus pneumoniae, Klebsiella pneumoniae, and Staphylococcus aureus) and two dissimilar viral (respiratory syncytial virus and influenza A virus) respiratory pathogens, all of them highly relevant for human health...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28298454/in-vitro-activity-of-imipenem-against-carbapenemase-positive-enterobacteriaceae-smart-global-surveillance-program-2008-2014
#6
James A Karlowsky, Sibylle H Lob, Krystyna M Kazmierczak, Robert E Badal, Katherine Young, Mary R Motyl, Daniel F Sahm
The Study for Monitoring Antimicrobial Resistance Trends (SMART) global surveillance program collected 103,960 isolates of Enterobacteriaceae from 2008 to 2014. From this isolate collection all ertapenem-non-susceptible isolates (MIC, ≥1 μg/ml; n = 3,428) and 9,371 isolates of Escherichia coli, Klebsiella pneumoniae, Klebsiella oxytoca, and Proteus mirabilis with an ertapenem-susceptible extended-spectrum β-lactamase (ESBL)-positive phenotype were assessed for the presence of common carbapenemase genes using the Check-MDR CT101 microarray (Check-Points, Wageningen, the Netherlands) and published multiplex PCR assays...
March 15, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28298206/burden-and-spectrum-of-bacterial-infections-among-sickle-cell-disease-children-living-in-cameroon
#7
Anastasie Nicole Alima Yanda, Jobert Richie N Nansseu, Hubert Désiré Mbassi Awa, Sandra A Tatah, Judith Seungue, Charlotte Eposse, Paul Olivier N Koki
BACKGROUND: Although sickle cell disease (SCD) children are highly susceptible to bacterial infections (BIs), there is a dreadful lack of data related to the burden and spectrum of BIs in sub-Saharan Africa (SSA), the highest affected region with SCD. This study aimed to determine the burden and spectrum of BIs among SCD children hospitalized in a pediatric reference hospital in Cameroon, a SSA country. METHODS: We conducted a retrospective analysis of records of children hospitalized from November 2012 to August 2015 in the SCD unit of the Mother and Child Centre of the Chantal Biya Foundation, Cameroon...
March 15, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28295617/carbapenemases-producing-klebsiella-pneumoniae-in-hospitals-of-two-regions-of-southern-italy
#8
Carla Calia, Carlo Pazzani, Marta Oliva, Maria Scrascia, Piero Lovreglio, Carmen Capolongo, Anna Maria Dionisi, Adriana Chiarelli, Rosa Monno
Carbapenem-resistant Klebsiella pneumoniae infections are reported with increasing frequency elsewhere in the world, representing a worrying phenomenon for global health. In Italy, there are hotspot data on the diffusion and type of carbapenemase-producing Enterobacteriaceae and K. pneumoniae in particular, with very few data coming from Apulia and Basilicata, two regions of Southern Italy. This study was aimed at characterizing by phenotypic and genotypic methods carbapenem-resistant K. pneumoniae isolated from several Hospitals of Apulia and Basilicata, Southern Italy...
March 15, 2017: APMIS: Acta Pathologica, Microbiologica, et Immunologica Scandinavica
https://www.readbyqxmd.com/read/28291698/detection-and-analysis-of-different-interactions-between-resistance-mechanisms-and-carbapenems-in-clinical-isolates-of-klebsiella-pneumoniae
#9
Tanise Vendruscolo Dalmolin, Bianca Vendruscolo Bianchini, Grazielle Guidolin Rossi, Ana Carolina Ramos, Ana Cristina Gales, Priscila de Arruda Trindade, Marli Matiko Anraku de Campos
Carbapenems are considered last-line agents for the treatment of serious infections caused by Klebsiella pneumoniae, and this microorganism may exhibit resistance to β-lactam antibiotics due to different mechanisms of resistance. We evaluated 27 isolates of K. pneumoniae resistant to carbapenems recovered from inpatients at the University Hospital of Santa Maria-RS from July 2013 to August 2014. We carried out antimicrobial susceptibility, carbapenemase detection, testing for the presence of efflux pump by broth microdilution and loss of porin by sodium dodecyl sulfate polyacrylamide gel electrophoresis...
February 9, 2017: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/28291671/molecular-characterization-of-kpc-producing-klebsiella-pneumoniae-isolated-from-patients-in-a-public-hospital-in-caracas-venezuela
#10
Aura Dayana Falco Restrepo, Mariel Alexandra Velásquez Nieves, Howard Takiff
INTRODUCTION: Klebsiella pneumoniae carbapenemase (KPC)-producing bacteria are amongst the most important causative agents of nosocomial infections worldwide. Isolates of this bacterium have been identified in Venezuela but little is known about their local spread. The aim of this study was to perform the molecular characterization of KPC-producing strains isolated from 2012 to 2013 in a public hospital in Caracas, Venezuela. METHODS: Twenty-two K. pneumoniae clinical isolates phenotypically classified as KPC producing were subjected to PCR screening for the presence of blaKPC genes and their location within transposon Tn4401...
March 11, 2017: Enfermedades Infecciosas y Microbiología Clínica
https://www.readbyqxmd.com/read/28289407/a-novel-antimicrobial-endolysin-lyspa26-against-pseudomonas-aeruginosa
#11
Mingquan Guo, Chunyan Feng, Jie Ren, Xuran Zhuang, Yan Zhang, Yongzhang Zhu, Ke Dong, Ping He, Xiaokui Guo, Jinhong Qin
The global increase in multidrug resistant (MDR) bacteria has led to phage therapy being refocused upon. A novel endolysin, LysPA26, containing a lysozyme-like domain, was screened against Pseudomonas aeruginosa in this study. It had activity against MDR P. aeruginosa without pretreatment with an outer-membrane permeabilizer. LysPA26 could kill up to 4 log units P. aeruginosa in 30 min. In addition, temperature and pH effect assays revealed that LysPA26 had good stability over a broad range of pH and temperatures...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28289030/antibiotic-prophylaxis-is-associated-with-subsequent-resistant-infections-in-children-with-an-initial-extended-spectrum-cephalosporin-resistant-enterobacteriaceae-infection
#12
Sibani Das, Amanda L Adler, Arianna Miles-Jay, Matthew P Kronman, Xuan Qin, Scott J Weissman, C A Burnham, Alexis Elward, Jason G Newland, Rangaraj Selvarangan, Kaede V Sullivan, Theoklis Zaoutis, Danielle M Zerr
The objective of this study was to assess the association between previous antibiotic use, particularly long-term prophylaxis, and occurrence of subsequent resistant infections in children with index infections due to extended-spectrum cephalosporin-resistant Enterobacteriaceae We also investigated the concordance of index and subsequent isolates. Extended-spectrum cephalosporin-resistant E. coli and Klebsiella spp. isolated from normally sterile sites of patients aged <22 years were collected along with associated clinical data from four freestanding pediatric centers...
March 13, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28287720/discovery-of-novel-pyridone-conjugated-monosulfactams-as-potent-and-broad-spectrum-antibiotics-for-multidrug-resistant-gram-negative-infections
#13
Liang Tan, Yunliang Tao, Ting Wang, Feng Zou, Shuhua Zhang, Qunhuan Kou, Ao Niu, Qian Chen, Wenjing Chu, Xiaoyan Chen, Haidong Wang, Yushe Yang
Conjugating a siderophore to an antibiotic is a promising strategy to overcome the permeability-mediated resistance of Gram-negative pathogens. Based on the structure of BAL30072, novel pyridone-conjugated monosulfactams incorporating diverse substituents into the methylene linker between the 1,3-dihydroxypyridin-4(1H)-one and the aminothiazole oxime were designed and synthesized. Structure-activity relationship studies revealed that a variety of substituents were tolerated, with isopropyl (compound 12c) and methylthiomethyl (compound 16a) showing the best efficacy against multidrug-resistant (MDR) Gram-negative pathogens...
March 13, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28286833/ventilator-associated-pneumonia-and-its-responsible-germs-an-epidemiological-study
#14
Rama Bozorgmehr, Vanousheh Bahrani, Alireza Fatemi
INTRODUCTION: Ventilator-associated pneumonia (VAP) is one of the most common hospital infections and a side effect of lengthy stay in intensive care unit (ICU). Considering the ever-changing pattern of common pathogens in infectious diseases and the raise in prevalence of hospital infections, the present study was designed aiming to determine the prevalence of VAP and its bacterial causes. METHODS: In this cross-sectional study, the medical profiles of all the patients under mechanical ventilation, who had no symptoms of pneumonia at the time of intubation and developed new infiltration in chest radiography after 48 hours under mechanical ventilation along with at least 2 of the symptoms including fever, hypothermia, leukocytosis, leukopenia, or purulent discharge from the lungs, were evaluated...
2017: Emergency (Tehran, Iran)
https://www.readbyqxmd.com/read/28286165/disparate-domains-klebsiella-pneumoniae-liver-abscess-syndrome
#15
Jacquelyn R Sink, William A Pasculle, Neel B Shah, Emanuel N Vergis
No abstract text is available yet for this article.
March 9, 2017: American Journal of Medicine
https://www.readbyqxmd.com/read/28285868/more-than-meets-the-eye-klebsiella-pneumoniae-invasive-liver-abscess-syndrome-presenting-with-endophthalmitis
#16
Jan Van Keer, Karel Van Keer, Joachim Van Calster, Inge Derdelinckx
BACKGROUND: Endophthalmitis is a feared complication of pyogenic liver abscesses caused by hypervirulent Klebsiella pneumoniae strains. First described in East Asia in the 1980s, this invasive syndrome is only recently emerging in Europe and America. CASE REPORT: We describe an 84-year-old man who presented to the emergency department with fever, orbital cellulitis, and bilateral visual loss. Although the patient had no overt abdominal symptoms, computed tomography scan revealed a pyogenic liver abscess...
March 9, 2017: Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28283020/carbapenem-resistant-klebsiella-pneumoniae-in-high-risk-haematological-patients-factors-favouring-spread-risk-factors-and-outcome-of-carbapenem-resistant-klebsiella-pneumoniae-bacteremias
#17
Alessandra Micozzi, Giuseppe Gentile, Clara Minotti, Claudio Cartoni, Saveria Capria, Daniele Ballarò, Stefania Santilli, Emanuele Pacetti, Sara Grammatico, Giampaolo Bucaneve, Robin Foà
BACKGROUND: Carbapenem-resistant Klebsiella pneumoniae (CRKP) spread and infections in patients with haematological malignancies are a serious concern especially in endemic areas. Treatment failures and delay in appropriate therapy for CRKP infections are frequent and the mortality rate associated with CRKP bacteremia in neutropenic haematological patients is reported about 60%. METHODS: Haematological patients harboring CRKP hospitalized between February 2012 and May 2013 in an Italian Teaching hospital were examined...
March 10, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28282434/resistance-of-hypervirulent-klebsiella-pneumoniae-to-both-intracellular-and-extracellular-killing-of-neutrophils
#18
Lifeng Wang, Dingxia Shen, Hua Wu, Yanning Ma
Hypervirulent Klebsiella pneumoniae (HvKP) is hypermucoviscous organism, carrying genes of rmpA and aerobactin, causing serious community-acquired infection and metastatically spread in young healthy hosts. Neutrophils play an important role during innate immune response against bacterial infection by phagocytosis and neutrophil extracellular traps (NETs). Whether neutrophils can effectively defend against HvKP remains unclear. In this study, we observed that the HvKP was significantly more resistant to neutrophil-mediated phagocytosis and intracellular killing than classic Klebsiella pneumoniae (cKP) isolates...
2017: PloS One
https://www.readbyqxmd.com/read/28280486/the-resistance-phenotype-and-molecular-epidemiology-of-klebsiella-pneumoniae-in-bloodstream-infections-in-shanghai-china-2012-2015
#19
Shu-Zhen Xiao, Su Wang, Wen-Man Wu, Sheng-Yuan Zhao, Fei-Fei Gu, Yu-Xing Ni, Xiao-Kui Guo, Jie-Ming Qu, Li-Zhong Han
Klebsiella pneumoniae (K.pneumoniae) is a common nosocomial pathogen causing bloodstream infections. Antibiotic susceptibility surveillance and molecular characterization will facilitate prevention and management of K. pneumoniae bloodstream infections. K. pneumoniae isolates causing bloodstream infections were consecutively collected between January 2012 and December 2015 in Shanghai. Eighty isolates (20 per year) were randomly selected and enrolled in this study. Drug susceptibility were determined by the disk diffusion method...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28280056/comparative-analyses-of-selection-operating-on-non-translated-intergenic-regions-of-diverse-bacterial-species
#20
Harry A Thorpe, Sion C Bayliss, Laurence D Hurst, Edward J Feil
Non-translated intergenic regions (IGRs) comprise 10-15% of bacterial genomes, and contain many regulatory elements with key functions. Despite this, there are few systematic studies on the strength and direction of selection operating on IGRs in bacteria using whole genome sequence datasets. Here we exploit representative whole genome datasets from six diverse bacterial species; Staphylococcus aureus, Streptococcus pneumoniae, Mycobacterium tuberculosis, Salmonella enterica, Klebsiella pneumoniae and Escherichia coli We compare patterns of selection operating on IGRs using two independent methods; the proportion of singleton mutations, and the dI/dS ratio; where dI is the number of intergenic SNPs per intergenic site...
March 9, 2017: Genetics
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