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https://www.readbyqxmd.com/read/29678910/serotype-diversity-and-antimicrobial-resistance-among-salmonella-enterica-isolated-from-patients-at-an-equine-referral-hospital
#1
I M Leon, S D Lawhon, K N Norman, D S Threadgill, N Ohta, J Vinasco, H M Scott
Although Salmonella enterica can produce life-threatening colitis in horses, certain serotypes are more commonly associated with clinical disease. Our aim was to evaluate the proportional morbidity attributed to different serotypes, as well as phenotypic and genotypic antimicrobial resistance (AMR) of Salmonella isolated from patients at an equine referral hospital in the southern United States. Two-hundred-fifty-five Salmonella isolates were obtained from clinical samples of patients admitted to the hospital between 2007 and 2015...
April 20, 2018: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29675838/t4-like-escherichia-coli-phages-from-the-environment-carry-bla-ctx-m
#2
Juliet Roshini Mohan Raj, Rajeshwari Vittal, Prashant Huilgol, Udaya Bhat, Indrani Karunasagar
The resistance determinant blaCTX -M has many variants and has been the most commonly reported gene in clinical isolates of extended spectrum beta-lactamase (ESBL) producing Escherichia coli. Phages have been speculated as potential reservoirs of resistance genes and efficient vehicles for horizontal gene transfer. The objective of the study was to determine the prevalence and characterize bacteriophages that harbour the resistance determinant blaCTX -M . E.coli specific bacteriophages were isolated from 15 samples including soil and water across Mangaluru, India using bacterial hosts that were sensitive to β-lactams...
April 20, 2018: Letters in Applied Microbiology
https://www.readbyqxmd.com/read/29675779/antibiotic-resistance-and-molecular-characteristics-of-staphylococcus-aureus-isolated-from-backyard-raised-pigs-and-pig-workers
#3
Asabe Halimat Momoh, Jacob K P Kwaga, Mohammed Bello, Anthony K B Sackey, Anders Rhod Larsen
Staphylococcus aureus is a commensal and pathogenic bacterium with impact on public health and livestock industry. The study investigated nasal carriage, antibiotic resistance, and molecular characterization of S. aureus in pigs and pig workers. Nasal swabs from 300 backyard-raised pigs and 101 pig workers were used for the study. Resulting isolates were confirmed using MALDI-TOF MS, tested for antibiotic resistance, and three different multiplex PCRs were used to detect enterotoxin, mecA, spaA, scn, and pvl genes...
April 19, 2018: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/29674034/a-voltammetric-test-for-the-rapid-discrimination-of-%C3%AE-lactamase-producing-enterobacteriaceae-in-blood-cultures
#4
Laetitia Betelli, Catherine Neuwirth, Sébastien Solanas, Benoît Chantemesse, Fabienne Vienney, Alain Hartmann, Murielle Rochelet
The accurate identification of β-lactamases produced by Enterobacteriaceae is a major challenge in clinical laboratories in order to optimize antimicrobial treatment and patient care. We describe here a rapid voltammetric-based method to detect and to discriminate β-lactamase activity in Enterobacteriaceae i.e., penicillinase, cephalosporinase (inducible or overproduced), extended-spectrum beta-lactamase and carbapenemase producers. After a 2-h growth step of the sample under three separate conditions: 1) LB (Luria-Bertani) medium, 2) LB supplemented with 4 μg/mL cefotaxime and 3) LB supplemented with 4 μg/mL cefotaxime and 100 μg/mL potassium clavulanate, the β-lactamase activity was measured by incubating a 0...
July 1, 2018: Talanta
https://www.readbyqxmd.com/read/29671364/infectious-complications-in-morbidly-adherent-placenta-treated-with-leaving-placenta-in-situ-a-cohort-series-and-suggested-approach
#5
Mehmet Kutuk, Aysegul Kilic, Mehmet Ak, Mahmut Ozgun
BACKGROUND: The aim of this study is to assess the clinical and microbiological features of infections in patients with morbidly adherent placenta (MAP) treated by leaving placenta in situ (LPIS). MATERIAL AND METHODS: Retrospective analysis of MAP cases who were treated by LPIS between 2 May, 2010 and 15 March 2017. The inclusion criteria's were: gestational age at or above 24 weeks, prenatal diagnosis elective operation, and complete data. RESULTS: Nineteen MAP cases were treated by LPIS during the study period...
April 19, 2018: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/29669670/utilization-and-timeliness-of-an-inpatient-penicillin-allergy-evaluation
#6
Keith A Sacco, Razvan Chirila, Claudia Libertin, Brett Hiroto, Arveen Bhasin, Margaret M Johnson, Thanai Pongdee, M Caroline Burton
BACKGROUND: A history of penicillin allergy is associated with an increased risk of nosocomial infections because patients are exposed to non-beta lactam antibiotics. Ruling out inaccurate penicillin allergy during hospitalization decreases prescription of beta lactam antibiotics. However, the utilization of penicillin allergy testing and timeliness in relation to initiation of antibiotics is not known. OBJECTIVE: Our aim was to describe the proportion and characteristics of patients who underwent inpatient penicillin allergy testing in a hospital without a guideline or infrastructure for inpatient penicillin allergy testing...
May 1, 2018: Allergy and Asthma Proceedings:
https://www.readbyqxmd.com/read/29667378/alarming-results-of-nosocomial-infections-in-a-multicenter-program-of-surveillance-in-polish-intensive-care-units
#7
Michał Wałaszek, Anna Różańska, Małgorzata Bulanda, Jadwiga Wojkowska-Mach, Polish Society of Hospital Infections Team
INTRODUCTION: Nosocomial bloodstream infections (BSI) among patients in intensive care units (ICU) are the most common form of nosocomial infections and they are serious complications of the treatment process. The etiological factors of these infections and the proper antibiotic therapy can influence the effects of patient treatment. The aim of the study was to analyze the epidemiology, microbiology and antibiotic therapy of nosocomial BSI in Polish ICU patients. MATERIALS AND METHODS: The retrospective study covered patients hospitalized in seven ICUs for adults with a general profile, located in southern Poland...
2018: Przegla̧d Epidemiologiczny
https://www.readbyqxmd.com/read/29665424/draft-genome-sequence-of-escherichia-coli-st977-a-clinical-multidrug-resistant-strain-harbouring-bla-ndm-3-isolated-from-bloodstream-infection
#8
Xi Li, Long Sun, Yongze Zhu, Mengyuan Shen, Yuexing Tu
OBJECTIVES: The emergence of Carbapenem-resistant E. coli has become a serious challenge to manage in the clinic because of multi-drug resistance. Here, we report the draft genome sequence of a NDM-3-producing E. coli strain NT1 that was isolated from bloodstream infection in China. METHODS: Whole-genomic DNA of E. coli strain NT1 was extracted and was sequenced using an Illumina-Hiseq™ X Ten platform. The generated sequence reads were assembled using CLC Genomics Workbench...
April 14, 2018: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/29665345/evaluation-of-ifn-%C3%AE-enzyme-linked-immunospot-assay-elispot-as-a-first-line-test-in-the-diagnosis-of-non-immediate-hypersensitivity-to-amoxicillin-and-penicillin
#9
Lenka Sedláčková, Miroslav Průcha, Ingrid Poláková, Blanka Míková
The current diagnostic algorithm for beta-lactam allergy is based on skin and provocation tests, both of which carry a certain risk of inducing hypersensitivity reactions. Thus, non-invasive in vitro tests reliable enough to replace skin and provocation tests at least in a portion of patients are desirable. We aimed to verify the utility of IFN-γ ELISPOT as a first-line test in patients with suspected non-immediate hypersensitivity reaction to amoxicillin (AMX) and penicillin (PNC). The prospective observational study included 24 patients with recent, suspected non-immediate hypersensitivity reaction to AMX or PNC and 6 recently-exposed healthy subjects...
2018: Prague Medical Report
https://www.readbyqxmd.com/read/29662260/characterization-of-multidrug-resistant-acinetobacter-ssp-strains-isolated-from-medical-intensive-care-units-in-cali-colombia
#10
Rómel Fabian Gómez, Andres Castillo, Mónica Chávez-Vivas
Introduction: The extensive use of antibiotics has led to the emergence of multi-resistant strains in some species of the genus Acinetobacter . Objective: To investigate the molecular characteristics of multidrug-resistant of Acinetobacter ssp. strains isolated from 52 patients collected between March 2009 and July 2010 in medical intensive care units in Cali - Colombia. Methods: The susceptibility to various classes of antibiotics was determined by disc diffusion method, and the determination of the genomic species was carried out using amplified ribosomal DNA restriction analysis (ARDRA) and by sequencing of the 16s rDNA gene...
December 30, 2017: Colombia Médica: CM
https://www.readbyqxmd.com/read/29662129/intracellular-replication-of-streptococcus-pneumoniae-inside-splenic-macrophages-serves-as-a-reservoir-for-septicaemia
#11
Giuseppe Ercoli, Vitor E Fernandes, Wen Y Chung, Joseph J Wanford, Sarah Thomson, Christopher D Bayliss, Kornelis Straatman, Paul R Crocker, Ashley Dennison, Luisa Martinez-Pomares, Peter W Andrew, E Richard Moxon, Marco R Oggioni
Bacterial septicaemia is a major cause of mortality, but its pathogenesis remains poorly understood. In experimental pneumococcal murine intravenous infection, an initial reduction of bacteria in the blood is followed hours later by a fatal septicaemia. These events represent a population bottleneck driven by efficient clearance of pneumococci by splenic macrophages and neutrophils, but as we show in this study, accompanied by occasional intracellular replication of bacteria that are taken up by a subset of CD169+ splenic macrophages...
April 16, 2018: Nature Microbiology
https://www.readbyqxmd.com/read/29661861/forespore-targeting-of-spovd-in-bacillus-subtilis-is-mediated-by-the-n-terminal-part-of-the-protein
#12
Margareth Sidarta, Dongdong Li, Lars Hederstedt, Ewa Bukowska-Faniband
SpoVD and PBP4b are structurally very similar high molecular weight, class B, penicillin-binding proteins produced early during sporulation in Bacillus subtilis SpoVD is known to be essential for endospore cortex synthesis and thereby production of heat-resistant spores. The role of PBP4b is still enigmatic. Both proteins are synthesized in the cytoplasm of the mother cell. PBP4b remains in the cytoplasmic membrane of the mother cell whereas SpoVD accumulates in the forespore outer membrane. By the use of SpoVD/PBP4b chimeras with swapped protein domains we show that the N-terminal part of SpoVD, containing the single transmembrane region, determines forespore targeting of the protein...
April 16, 2018: Journal of Bacteriology
https://www.readbyqxmd.com/read/29661158/effect-of-an-intervention-targeting-inappropriate-continued-empirical-parenteral-vancomycin-use-a-quasi-experimental-study-in-a-region-of-high-mrsa-prevalence
#13
Pyoeng Gyun Choe, Hei Lim Koo, Doran Yoon, Ji Yun Bae, Eunyoung Lee, Joo-Hee Hwang, Kyoung-Ho Song, Wan Beom Park, Ji Hwan Bang, Eu Suk Kim, Hong Bin Kim, Sang Won Park, Myoung-Don Oh, Nam Joong Kim
BACKGROUND: Despite vancomycin use is a major risk factor for the emergence of vancomycin resistance, it is frequently inappropriately prescribed, especially as empirical treatment. We evaluated the effect of an antimicrobial stewardship intervention targeting for inappropriate continued empirical vancomycin use. METHODS: This was a quasi-experimental study comparing vancomycin use in a 6-month pre-intervention and 6-month intervention period. If empirical vancomycin was continued for more than 96 h without documentation of beta-lactam-resistant gram-positive microorganisms, it was considered inappropriate continued empirical vancomycin use...
April 16, 2018: BMC Infectious Diseases
https://www.readbyqxmd.com/read/29656053/novel-variant-ndm-11-and-other-ndm-1-variants-in-multidrug-resistant-escherichia-coli-from-south-india
#14
Mohibur Rahman, Chiranjay Mukhopadhyay, Ravi Prakash Rai, Sanjay Singh, Shefali Gupta, Avinash Singh, Ashutosh Pathak, Kashi Nath Prasad
OBJECTIVE: New Delhi metallo-β-lactamase (NDM-1) and its variants mediated carbapenem resistance has raised a major public health concern worldwide. In the present study, we report Escherichia coli positive novel variant i.e. NDM-11 for the first time METHODS: blaNDM were investigated in E. coli by PCR and sequencing. The blaNDM variants were further characterized. The susceptibility patterns of novel blaNDM-11 towards different antibiotics were compared with blaNDM-1 by cloning expressing in E...
April 12, 2018: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/29655759/determination-of-21-antibiotics-in-sea-cucumber-using-accelerated-solvent-extraction-with-in-cell-clean-up-coupled-to-ultra-performance-liquid-chromatography-tandem-mass-spectrometry
#15
Minghua Zhu, Hongxia Zhao, Deming Xia, Juan Du, Huaijun Xie, Jingwen Chen
An accelerated solvent extraction (ASE) with in-cell clean-up method coupled to ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) was developed to determine 21 antibiotics in sea cucumber. The analytes include 10 sulfonamides, 4 fluoroquinolones, 3 amphenicols, 2 beta-lactams, 1 lincosamide and trimethoprim. Optimal parameters of ASE method were obtained at 80 °C, 1 static cycle of 5 min with methanol/acetonitrile (1/1, v/v) using 2 g of C18 as adsorbent. Recoveries at 50...
August 30, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29655726/validated-multiclass-targeted-determination-of-antibiotics-in-fish-with-high-performance-liquid-chromatography-benchtop-quadrupole-orbitrap-hybrid-mass-spectrometry
#16
Luca Chiesa, Sara Panseri, Elisa Pasquale, Renato Malandra, Radmila Pavlovic, Francesco Arioli
High performance liquid chromatography, coupled with a benchtop Q-Exactive Orbitrap high-resolution mass spectrometer, was successfully applied for the determination of 24 target antibiotics (selected beta-lactams, tetracyclines, fluoroquinolones, sulfonamids, phenicols, macrolides, cephalosporins, lincosamides, diaminopyrimidine) in fish matrices. The Q-Exactive parameters were carefully studied to accomplish the best compromise between a suitable scan speed and selectivity, considering the restrictions associated with generic sample preparation methodology...
August 30, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29644421/-infections-after-bite-wounds-for-example-rat-bite-fever-due-to-streptobacillus-moniliformis
#17
Herbert Hof, Rudolf Binder, Christian Schäfer, Madeleine Stuber, Andreas Licht, Iris Bozenhardt-Stavrakidis, Konrad Bode
Rat bite fever due to Streptobacillus moniliformis induces typical but not pathognomonic clinical signs, such as local purulent wound infection followed by maculopapular exanthema, myalgia as well as purulent joint infections. Severe complications, such as osteomyelitis and endocarditis are possible. it seems that this infection is rarely diagnosed but this infection could be much more common because the final diagnostic proof is difficult to achieve. Firstly, the culture of these bacteria is critical because the bacteria are fastidious and secondly the exact differentiation of the isolates is hardly possible by standard laboratory methods...
April 11, 2018: Der Unfallchirurg
https://www.readbyqxmd.com/read/29625107/cephalosporin-antibiotics-are-weak-blockers-of-gabaa-receptor-mediated-synaptic-transmission-in-rat-brain-slices
#18
Dmitry V Amakhin, Elena B Soboleva, Aleksey V Zaitsev
Cephalosporins are beta-lactam antibiotics that are extensively used in medical practice and are reported to cause epileptic seizures in some patients. The primary cause of cephalosporin-induced convulsions is believed to be their ability to block GABAa receptors. However, direct evidence for the involvement of this mechanism has not yet been provided. The present study aims to investigate the ability of two cephalosporins - cefepime and ceftriaxone - to block inhibitory synaptic transmission in entorhinal cortex slices of rats...
April 3, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29624841/enantioselective-synthesis-of-medium-sized-lactams-employing-chiral-alpha-beta-unsaturated-acylammonium-salts
#19
Daniel Romo
Medium-sized lactams are important structural motifs found in a variety of bioactive compounds and natural products but are challenging to prepare especially in optically active form. A Michael-proton transfer lactamization organocascade process is described that delivers medium-sized lactams including azepanones, benzazepinones, azocanones and benzazocinones in high enantiopurity through the intermediacy of chiral, alpha, beta-unsaturated acylammonium salts. An unexpected indoline synthesis was also uncovered and the benzazocinone skeleton was transformed into other complex heterocyclic derivatives including spiroglutarimides, isoquinolinones and delta- lactones...
April 6, 2018: Angewandte Chemie
https://www.readbyqxmd.com/read/29619607/pharmacokinetic-pharmacodynamic-considerations-of-beta-lactam-antibiotics-in-adult-critically-ill-patients
#20
REVIEW
Anne M Masich, Mojdeh S Heavner, Jeffrey P Gonzales, Kimberly C Claeys
PURPOSE OF REVIEW: Beta-lactam antibiotics are commonly prescribed in critically ill patients for a variety of infectious conditions. Our understanding of how critical illness alters beta-lactam pharmacokinetics/pharmacodynamics (PK/PD) is rapidly evolving. RECENT FINDINGS: There is a growing body of literature in adult patients demonstrating that physiological alterations occurring in critically ill patients may limit our ability to optimally dose beta-lactam antibiotics to reach these PK/PD targets...
April 4, 2018: Current Infectious Disease Reports
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