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https://www.readbyqxmd.com/read/28521000/the-ecology-of-extended-spectrum-%C3%AE-lactamases-esbls-in-the-developed-world
#1
Yohei Doi, Alina Iovleva, Robert A Bonomo
Background: Since the initial appearance in the 1980s, Enterobacteriaceae producing extended-spectrum β-lactamase (ESBL) have increased in prevalence and emerged as a major antimicrobial-resistant pathogen. The source of these antimicrobial-resistant bacteria in the developed world is an area of active investigation. Methods: A standard internet search was conducted with a focus on the epidemiology and potential sources of ESBL-producing Enterobacteriaceae in the developed world...
April 1, 2017: Journal of Travel Medicine
https://www.readbyqxmd.com/read/28517240/imaging-after-treatment-in-uterine-malignancies-spectrum-of-normal-findings-and-most-common-complications
#2
REVIEW
Maura Miccò, Anna Maria Telesca, Benedetta Gui, Pier Paolo Grimaldi, Francesco Cambi, Maria Giulia Marini, Anna Lia Valentini, Lorenzo Bonomo
Uterine malignancies account for the majority of gynaecologic cancers. Different treatment options are available depending on histology, disease grade and stage. Hysterectomy is the most frequent surgical procedure. Chemotherapy and radiation therapy (CRT) represents the preferred therapeutic choice for locally advanced uterine and cervical malignancies. Imaging of the female pelvis following these treatments is particularly challenging due to alteration of the normal anatomy. Radiologists should be familiar with both the expected post-treatment imaging findings and the imaging features of possible complications to make the correct interpretation and avoid possible pitfalls...
May 18, 2017: Journal of Medical Imaging and Radiation Oncology
https://www.readbyqxmd.com/read/28500486/tips-and-tricks-for-a-safe-and-effective-image-guided-percutaneous-renal-tumour-ablation
#3
REVIEW
Giovanni Mauri, L Nicosia, G M Varano, G Bonomo, P Della Vigna, L Monfardini, F Orsi
Image-guide thermal ablations are nowadays increasingly used to provide a minimally invasive treatment to patients with renal tumours, with reported good clinical results and low complications rate. Different ablative techniques can be applied, each with some advantages and disadvantages according to the clinical situation. Moreover, percutaneous ablation of renal tumours might be complex in cases where there is limited access for image guidance or a close proximity to critical structures, which can be unintentionally injured during treatment...
May 12, 2017: Insights Into Imaging
https://www.readbyqxmd.com/read/28482143/discovery-of-1-hydroxypyridine-2-1h-thione-6-carboxylic-acid-as-a-first-in-class-low-cytotoxic-nanomolar-metallo-%C3%AF-lactamase-inhibitor
#4
Ramaiah Muthyala, Woo Shik Shin, Yuk Yin Sham, Alexander Bergstrom, Michael W Crowder, Robert A Bonomo
VIM-2 is one of the most common carbapenem-hydrolyzing metallo lactamase (MBL) found in many drug resistant Gram-negative bacteria. Currently, there is a lack of effective lead compounds with optimal therapeutic potential within our drug development pipeline. Here we report the discovery of 1-hydroxypyridine-2(1H)-thione-6-carboxylic acid (3) as a first-in class metallo lactamase inhibitor (MBLi) with a potent inhibition Ki of 13 nM against VIM-2 that corresponds to a remarkable 0.99 ligand efficiency...
May 8, 2017: ChemMedChem
https://www.readbyqxmd.com/read/28468855/simple-screening-for-carbapenemase-producing-enterobacteriaceae-by-moxalactam-susceptibility-testing
#5
Waka Imai, Masakazu Sasaki, Kotaro Aoki, Yoshikazu Ishii, Robert A Bonomo, Tse Hsien Koh, Hinako Murakami, Toshisuke Morita, Kazuhiro Tateda
The increase of carbapenemase producing Enterobacteriaceae (CPE) is a serious concern worldwide (1-7).….
May 3, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28461314/ndm-5-and-oxa-181-beta-lactamases-a-significant-threat-continues-to-spread-in-the-americas
#6
Laura J Rojas, Andrea M Hujer, Susan D Rudin, Meredith S Wright, T Nicholas Domitrovic, Steven H Marshall, Kristine M Hujer, Sandra S Richter, Eric Cober, Federico Perez, Mark D Adams, David van Duin, Robert A Bonomo
Among Gram-negative bacteria, carbapenem resistant (CR) infections pose a serious and life threatening challenge. Here, the CRACKLE network reports a sentinel detection and characterization of a CR Klebsiella pneumoniae ST147 isolate harboring blaNDM-5 and blaOXA-181, from a young man who underwent abdominal surgery in India. blaNDM-5 was located on an IncFII plasmid of ≈ 90Kb, while blaOXA-181 was chromosomally encoded. Resistome and genome analysis demonstrated multiple copies of the transposable element IS26 and a "hotspot region" in the IncFII plasmid...
May 1, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28442293/effect-of-appropriate-combination-therapy-on-mortality-of-patients-with-bloodstream-infections-due-to-carbapenemase-producing-enterobacteriaceae-increment-a-retrospective-cohort-study
#7
Belén Gutiérrez-Gutiérrez, Elena Salamanca, Marina de Cueto, Po-Ren Hsueh, Pierluigi Viale, José Ramón Paño-Pardo, Mario Venditti, Mario Tumbarello, George Daikos, Rafael Cantón, Yohei Doi, Felipe Francisco Tuon, Ilias Karaiskos, Elena Pérez-Nadales, Mitchell J Schwaber, Özlem Kurt Azap, Maria Souli, Emmanuel Roilides, Spyros Pournaras, Murat Akova, Federico Pérez, Joaquín Bermejo, Antonio Oliver, Manel Almela, Warren Lowman, Benito Almirante, Robert A Bonomo, Yehuda Carmeli, David L Paterson, Alvaro Pascual, Jesús Rodríguez-Baño
BACKGROUND: The best available treatment against carbapenemase-producing Enterobacteriaceae (CPE) is unknown. The objective of this study was to investigate the effect of appropriate therapy and of appropriate combination therapy on mortality of patients with bloodstream infections (BSIs) due to CPE. METHODS: In this retrospective cohort study, we included patients with clinically significant monomicrobial BSIs due to CPE from the INCREMENT cohort, recruited from 26 tertiary hospitals in ten countries...
April 21, 2017: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/28435654/an-unusual-case-of-primary-extranodal-lymphoma-of-the-gallbladder
#8
Roberto Pezzuto, Davide Di Mauro, Luca Bonomo, Amita Patel, Edoardo Ricciardi, Andrea Attanasio, Antonio Manzelli
Primary gallbladder lymphoma is an extremely rare disease. We report a case of a 63 year-old woman who has been admitted with gradual onset abdominal pain in the upper right quadrant and in the suprapubic region, nausea and malaise. According to the computed tomography scan of the abdomen, which was suggestive of chronic cholecystitis, she was treated conservatively. A laparoscopic cholecystectomy was performed 5 months later and the histological examination of the gallbladder showed a low grade small lymphocytic lymphoma...
February 23, 2017: Hematology Reports
https://www.readbyqxmd.com/read/28432645/efficacy-of-lomitapide-in-the-treatment-of-familial-homozygous-hypercholesterolemia-results-of-a-real-world-clinical-experience-in-italy
#9
Laura D'Erasmo, Angelo Baldassare Cefalù, Davide Noto, Antonina Giammanco, Maurizio Averna, Paolo Pintus, Paolo Medde, Giovanni Battista Vigna, Cesare Sirtori, Laura Calabresi, Chiara Pavanello, Marco Bucci, Carlo Sabbà, Patrizia Suppressa, Francesco Natale, Paolo Calabrò, Tiziana Sampietro, Federico Bigazzi, Francesco Sbrana, Katia Bonomo, Fulvio Sileo, Marcello Arca
INTRODUCTION: Homozygous familial hypercholesterolaemia (HoFH) is a rare form of inherited dyslipidemia resistant to conventional cholesterol-lowering medications so that lipoprotein apheresis (LA) is usually required. Lomitapide has been approved for the treatment of HoFH. The aim of this study was to evaluate the benefits of lomitapide in HoFH patients followed with the usual clinical care. METHODS: Clinical and biochemical data were retrospectively collected in 15 HoFH patients (10 with mutations in the LDLR gene and 5 in the LDLRAP1 gene) treated for at least 6 months with lomitapide in addition to lipid-lowering therapies (LLT) in different Lipid Clinics across Italy...
April 21, 2017: Advances in Therapy
https://www.readbyqxmd.com/read/28429345/a-peculiar-case-of-diffuse-hemangiomatosis-of-the-left-hepatic-lobe-in-an-asymptomatic-adult-patient-case-report-and-literature-review
#10
A Guerra, A Infante, E Rinninella, I Spinelli, M A Mazziotti, A M De Gaetano, M Pompili, L Bonomo
We report a rare case of diffuse hepatic hemangiomatosis (DHH) of the left hepatic lobe coexistent with giant hepatic hemangioma and without extra-hepatic involvement in an asymptomatic adult patient. Liver hemangiomas are the most common benign liver tumors. However, DHH without extra-hepatic involvement has rarely been reported in adults. Furthermore, giant hepatic hemangioma coexistent with DHH is even uncommon, although an association between hemangiomatosis and giant hepatic hemangiomas may be supposed...
April 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28428984/a-comparison-of-molecular-typing-methods-applied-to-enterobacter-cloacae-complex-hsp60-sequencing-rep-pcr-and-mlst
#11
Roberto A Viau, Lee M Kiedrowski, Barry N Kreiswirth, Mark Adams, Federico Perez, Dror Marchaim, Dubert M Guerrero, Keith S Kaye, Latania K Logan, Maria Virginia Villegas, Robert A Bonomo
Molecular typing using repetitive sequenced-based PCR (rep-PCR) and hsp60 sequencing were applied to a collection of diverse Enterobacter cloacae complex isolates. To determine the most practical method for reference laboratories, we analyzed 71 E. cloacae complex isolates from sporadic and outbreak occurrences originating from 4 geographic areas. While rep-PCR was more discriminating, hsp60 sequencing provided a broader and a more objective geographical tracking method similar to multilocus sequence typing (MLST)...
2017: Pathogens & Immunity
https://www.readbyqxmd.com/read/28418318/carbapenem-resistant-enterobacter-cloacae-in-patients-from-the-us-veterans-health-administration-2006-2015
#12
Brigid M Wilson, Nadim G El Chakhtoura, Sachin Patel, Elie Saade, Curtis J Donskey, Robert A Bonomo, Federico Perez
We analyzed carbapenem-resistant Enterobacteriaceae (CRE) trends among patients from the US Veterans Health Administration (VHA). After the emergence of CRE in the eastern United States, resistance rates remained stable in Klebsiella pneumoniae but increased in Enterobacter cloacae complex, suggesting a "second epidemic". VHA offers a vantage point for monitoring nationwide CRE trends.
May 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28416558/in-vitro-discordance-with-in-vivo-activity-humanized-exposures-of-ceftazidime-avibactam-aztreonam-and-tigecycline-alone-and-in-combination-against-new-delhi-metallo-%C3%AE-lactamase-producing-klebsiella-pneumoniae-in-a-murine-lung-infection-model
#13
M L Monogue, L M Abbo, R Rosa, J F Camargo, O Martinez, R A Bonomo, D P Nicolau
The management of infections with New Delhi Metallo-beta-lactamase-1 (NDM) producing bacteria remains clinically challenging given the multi-drug resistant (MDR) phenotype associated with these bacteria. Despite resistance in vitro, ceftazidime-avibactam previously demonstrated in vivo activity against NDM+ Enterobacteriaceae. Herein, we observed in vitro synergy with ceftazidime-avibactam and aztreonam against a MDR K. pneumoniae harboring NDM. In vivo, humanized doses of ceftazidime-avibactam monotherapy resulted in > 2 log10CFU bacterial reduction, therefore, no in vivo synergy was observed...
April 17, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28398924/factors-leading-to-transmission-risk-of-acinetobacter-baumannii
#14
Kerri A Thom, Clare Rock, Sarah S Jackson, J Kristie Johnson, Arjun Srinivasan, Laurence S Magder, Mary-Claire Roghmann, Robert A Bonomo, Anthony D Harris
OBJECTIVES: To identify patient and healthcare worker factors associated with transmission risk of Acinetobacter baumannii during patient care. DESIGN: Prospective cohort study. SETTING: ICUs at a tertiary care medical center. PATIENTS: Adult ICU patients known to be infected or colonized with A. baumannii. MEASUREMENTS AND MAIN RESULTS: Cultures of skin, respiratory tract, and the perianal area were obtained from participants and evaluated for the presence of A...
April 10, 2017: Critical Care Medicine
https://www.readbyqxmd.com/read/28387522/mechanism-of-cytochrome-p450-17a1-catalyzed-hydroxylase-and-lyase-reactions
#15
Silvia Bonomo, Flemming Steen Jørgensen, Lars Olsen
Cytochrome P450 17A1 (CYP17A1) catalyzes C17 hydroxylation of pregnenolone and progesterone and the subsequent C17-C20 bond cleavage (lyase reaction) to form androgen precursors. Compound I (Cpd I) and peroxo anion (POA) are the heme-reactive species underlying the two reactions. We have characterized the reaction path for both the hydroxylase and lyase reactions using density functional theory (DFT) calculations and the enzyme-substrate interactions by molecular dynamics (MD) simulations. Activation barriers for positions subject to hydroxylase reaction have values close to each other and span from 54 to 60 kJ·mol(-1) with a small preference for 17α hydroxylation, in agreement with experimental observations...
April 19, 2017: Journal of Chemical Information and Modeling
https://www.readbyqxmd.com/read/28375583/flow-cytometry-and-capillary-electrophoresis-analyses-in-ethanol-stressed-oenococcus-oeni-strains-and-changes-assessment-of-membrane-fatty-acid-composition
#16
M G Bonomo, C Cafaro, A Guerrieri, F Crispo, L Milella, L Calabrone, G Salzano
AIMS: This study aimed to investigate the dynamics and physiological heterogeneity of Oenococcus oeni under different conditions, cell membrane fluidity and permeability variations, and assessment of changes in cell surface charging rates. METHODS AND RESULTS: Flow cytometry, membrane fatty acid analysis and capillary electrophoresis were performed to study ethanol-induced variations. Different physiological states were assessed, revealing cell subpopulations able to adapt and withstand to environmental stress, in order to recover their functionality...
April 4, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28360021/the-morbidly-adherent-placenta-when-and-what-association-of-signs-can-improve-mri-diagnosis-our-experience
#17
Anna Lia Valentini, Benedetta Gui, Valeria Ninivaggi, Maura Miccò, Michela Giuliani, Luca Russo, Maria Giulia Marini, Mauro Tintoni, Anna Franca Cavaliere, Lorenzo Bonomo
PURPOSE: We aimed to verify whether combination of specific signs improves magnetic resonance imaging (MRI) accuracy in morbidly adherent placenta (MAP). METHODS: MRI findings for MAP were retrospectively evaluated in 27 women. Histopathology was the reference standard, showing MAP in eight of 27 cases. Specificity, sensitivity, positive predictive value, and negative predictive value were calculated for all MRI signs. Two skilled radiologists analyzed MRI findings, resolving discrepancies by consensus, using three alternative diagnostic criteria during three consecutive sections...
May 2017: Diagnostic and Interventional Radiology: Official Journal of the Turkish Society of Radiology
https://www.readbyqxmd.com/read/28350903/advancing-diagnostics-to-address-antibacterial-resistance-the-diagnostics-and-devices-committee-of-the-antibacterial-resistance-leadership-group
#18
Ephraim L Tsalik, Elizabeth Petzold, Barry N Kreiswirth, Robert A Bonomo, Ritu Banerjee, Ebbing Lautenbach, Scott R Evans, Kimberly E Hanson, Jeffrey D Klausner, Robin Patel
Diagnostics are a cornerstone of the practice of infectious diseases. However, various limitations frequently lead to unmet clinical needs. In most other domains, diagnostics focus on narrowly defined questions, provide readily interpretable answers, and use true gold standards for development. In contrast, infectious diseases diagnostics must contend with scores of potential pathogens, dozens of clinical syndromes, emerging pathogens, rapid evolution of existing pathogens and their associated resistance mechanisms, and the absence of gold standards in many situations...
March 15, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28350901/gram-negative-bacterial-infections-research-priorities-accomplishments-and-future-directions-of-the-antibacterial-resistance-leadership-group
#19
Yohei Doi, Robert A Bonomo, David C Hooper, Keith S Kaye, James R Johnson, Cornelius J Clancy, Joshua T Thaden, Martin E Stryjewski, David van Duin
Antimicrobial resistance in pathogenic gram-negative bacteria is one of the most pressing challenges in the field of infectious diseases and is one of 4 key areas of unmet medical need identified by the Antibacterial Resistance Leadership Group (ARLG). The mission of the Gram-Negative Committee is to advance our knowledge of these challenging infections and implement studies to improve patient outcomes. Studies have fallen primarily into 2 broad categories: prospective cohort studies and interventional trials...
March 15, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28350898/leading-antibacterial-laboratory-research-by-integrating-conventional-and-innovative-approaches-the-laboratory-center-of-the-antibacterial-resistance-leadership-group
#20
Claudia Manca, Carol Hill, Andrea M Hujer, Robin Patel, Scott R Evans, Robert A Bonomo, Barry N Kreiswirth
The Antibacterial Resistance Leadership Group (ARLG) Laboratory Center (LC) leads the evaluation, development, and implementation of laboratory-based research by providing scientific leadership and supporting standard/specialized laboratory services. The LC has developed a physical biorepository and a virtual biorepository. The physical biorepository contains bacterial isolates from ARLG-funded studies located in a centralized laboratory and they are available to ARLG investigators. The Web-based virtual biorepository strain catalogue includes well-characterized gram-positive and gram-negative bacterial strains published by ARLG investigators...
March 15, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
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