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beta-lactamase inhibitor

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https://www.readbyqxmd.com/read/29228168/glutamate-residues-at-positions-162nd-and-164th-influence-the-beta-lactamase-activity-of-shv-14-obtained-from-klebsiella-pneumoniae
#1
Gaurav Kumar, Sarmistha Biswal, Soshina Nathan, Anindya S Ghosh
Extensive production of SHV-14 beta-lactamase makes Klebsiella pneumoniae resistant to beta-lactams. The presence of omega-loop has been reported to influence the beta-lactamase activity, which is also present in SHV-14. Its omega-loop has three glutamates in nearly alternating positions, 162, 164 and 167 but their concise role on the behaviour of SHV-14 is unknown. To uncover the influence of each glutamate on SHV-14, we replaced glutamates with alanine and estimated the effect of each mutation by assessing the change in beta-lactam sensitivities in the surrogate Escherichia coli cells and catalytic efficiencies for hydrolysis with the purified proteins...
December 6, 2017: FEMS Microbiology Letters
https://www.readbyqxmd.com/read/29220754/association-of-high-mortality-with-extended-spectrum-%C3%AE-lactamase-esbl-positive-cultures-in-community-acquired-infections
#2
Sumit Ray, Dimple Anand, Sankalp Purwar, Arijit Samanta, Kaustubh V Upadhye, Prasoon Gupta, Debashis Dhar
PURPOSE: Infections due to multidrug resistant organisms have become a serious health concern worldwide. The present study was conducted to investigate the spectrum of microbial resistance pattern in the community and their effects on mortality. METHODS: A retrospective review and analysis of prospectively collected data was done of all patients admitted with diagnosis of sepsis in two tertiary care ICU's for a period of two years. Demographics, culture positivity, microbial spectrum, resistance pattern and outcome data were collected...
October 31, 2017: Journal of Critical Care
https://www.readbyqxmd.com/read/29187917/multi-antibiotic-resistant-extended-spectrum-beta-lactamase-producing-bacteria-pose-a-challenge-to-the-effective-treatment-of-wound-and-skin-infections
#3
Angus Nnamdi Oli, Dennis Emeka Eze, Thaddeus Harrison Gugu, Ifeanyi Ezeobi, Ukamaka Nwakaku Maduagwu, Chibueze Peter Ihekwereme
Introduction: The increasing incidence of antibiotic resistant bacteria is a concern both to the clinicians and the patients due to obvious consequences such as treatment failures, prolonged patients' stay in hospital and nosocomial infections. The choice of the first antibiotic therapy in emergency wards in hospitals is usually not based on patient-specific microbial culture and susceptibility test result.This study is aimed at profiling extended-spectrum beta-lactamase (ESBL) producing bacteria associated with wound injuries and highlighting their multi-antibiotic resistance character...
2017: Pan African Medical Journal
https://www.readbyqxmd.com/read/29184412/a-6-year-study-of-complicated-urinary-tract-infections-in-southern-china-prevalence-antibiotic-resistance-clinical-and-economic-outcomes
#4
Xiaoyan Li, Yunqin Chen, Weiguo Gao, Hao Ye, Zhongchao Shen, Zehuai Wen, Jia Wei
Urinary tract infections (UTIs) are common nosocomial infections. This study evaluated the prevalence, pathogens, antibiotic resistances, clinical outcomes, and hospitalization costs associated with complicated UTIs in southern China, and risk factors delaying patient discharge. We retrospectively reviewed electronic medical records of 4,284 (61.4% women) complicated UTI-related hospitalizations from 2008 to 2013. Average patient age was 61.1 years and median hospital stay was 11 days. Pathogens were isolated from 1,071 urine and 148 blood specimens...
2017: Therapeutics and Clinical Risk Management
https://www.readbyqxmd.com/read/29158284/the-comparative-in-vitro-activity-of-relebactam-imipenem-and-the-combination-of-the-two-plus-six-comparator-antimicrobial-agents-against-432-strains-of-anaerobic-organisms-including-imipenem-resistant-strains
#5
Ellie J C Goldstein, Diane M Citron, Kerin L Tyrrell, Eliza Leoncio, C Vreni Merriam
Relebactam is an important beta-lactamase inhibitor for certain aerobic organisms but alone it has no anti-anaerobic activity, with most anaerobes having MICs ≥32 μg/ml with the exception of a very few strains. There was no enhancement or antagonism of imipenem activity with the addition of relebactam, including activity against imipenem resistant strains. The relebactam-imipenem combination had excellent overall activity against the anaerobes tested.
November 20, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29127502/piperacillin-tazobactam-as-alternative-to-carbapenems-for-icu-patients
#6
REVIEW
Benoit Pilmis, Vincent Jullien, Alexis Tabah, Jean-Ralph Zahar, Christian Brun-Buisson
Several studies suggest that alternatives to carbapenems, and particulary beta-lactam/beta-lactamase inhibitor combinations, can be used for therapy of extended-spectrum beta-lactamase-producing Enterobacteriaceae (ESBL-PE)-related infections in non-ICU patients. Little is known concerning ICU patients in whom achieving the desired plasmatic pharmacokinetic/pharmacodynamic (PK/PD) target may be difficult. Also, in vitro susceptibility to beta-lactamase inhibitors might not translate into clinical efficacy. We reviewed the recent clinical studies examining the use of BL/BLI as alternatives to carbapenems for therapy of bloodstream infection, PK/PD data and discuss potential ecological benefit from avoiding the use of carbapenems...
November 10, 2017: Annals of Intensive Care
https://www.readbyqxmd.com/read/29116290/drug-resistance-ampc-%C3%AE-lactamase-and-extended-spectrum-%C3%AE-lactamase-producing-enterobacteriaceae-isolated-from-fish-and-shrimp
#7
Marília Viana Albuquerque de Almeida, Ítalo Mendes Cangussú, Antonia Leonadia Siqueira de Carvalho, Izabelly Linhares Ponte Brito, Renata Albuquerque Costa
The present study aims to detect the production of extended-spectrum beta-lactamases (ESBL) by enterobacteria isolated from samples of fresh shrimp and fish obtained from the retail trade of the city of Sobral, Ceará State, Brazil. All bacterial isolates were submitted to identification and antimicrobial susceptibility testing using aminopenicillin, beta-lactamase inhibitors, carbapenem, 1st, 2nd, 3rd and 4th generation cephalosporins, and monobactam. Three types of beta-lactamases - ESBL, AmpC and KPC - were investigated...
November 6, 2017: Revista do Instituto de Medicina Tropical de São Paulo
https://www.readbyqxmd.com/read/29068939/watch-out-for-wild-animals-a-systematic-review-of-upper-extremity-injuries-caused-by-uncommon-species
#8
REVIEW
Jacqueline S Israel, James E McCarthy, Katherine R Rose, Venkat K Rao
BACKGROUND: Across the world, many species of nondomesticated animals dwell among humans in metropolitan areas. Rare animal bites pose a dilemma for hand surgeons, as they often result in operative injuries and recalcitrant infections. The authors treated an 85-year-old man who experienced severe cellulitis of the index finger following an opossum bite. This case prompted a systematic review of upper extremity injuries caused by species other than dogs, cats, snakes, and insects. METHODS: The authors conducted a systematic review of PubMed and Scopus databases to identify relevant articles published between 1980 and 2016...
November 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/29038260/meropenem-vaborbactam-resistance-selection-prevention-and-molecular-mechanisms-in-mutants-of-kpc-producing-klebsiella-pneumoniae
#9
Dongxu Sun, Debora Rubio-Aparicio, Kirk Nelson, Michael N Dudley, Olga Lomovskaya
Vaborbactam (formerly RPX7009) is a new beta-lactamase inhibitor based on a cyclic boronic acid pharmacophore with potent inhibitory activity against Klebsiella pneumoniaecarbapenemases (KPC). It has been developed in combination with meropenem. The objective of these studies was to identify concentrations of both agents associated with selecting or preventing single-step mutations leading to reduced sensitivity to the combination, and to characterize the selected mutations. Eighteen strains of KPC-producing Klebsiella pneumoniae with varying degrees of sensitivity to meropenem (MIC 8-512 μg/ml) and meropenem-vaborbactam (≤0...
October 16, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29020364/antimicrobial-resistance-in-gram-negative-rods-causing-bacteremia-in-hematopoietic-stem-cell-transplant-recipients-intercontinental-prospective-study-of-the-infectious-diseases-working-party-of-the-european-bone-marrow-transplantation-group
#10
Diana Averbuch, Gloria Tridello, Jennifer Hoek, Malgorzata Mikulska, Hamdi Akan, Lucrecia Yanez San Segundo, Thomas Pabst, Tülay Özçelik, Galina Klyasova, Irene Donnini, Depei Wu, Zafer Gülbas, Tsila Zuckerman, Aida Botelho de Sousa, Yves Beguin, Aliénor Xhaard, Emmanuel Bachy, Per Ljungman, Rafael de la Camara, Jelena Rascon, Isabel Ruiz Camps, Antonin Vitek, Francesca Patriarca, Laura Cudillo, Radovan Vrhovac, Peter J Shaw, Tom Wolfs, Tracey O'Brien, Batia Avni, Gerda Silling, Firas Al Sabty, Stelios Graphakos, Marja Sankelo, Henrik Sengeloev, Srinivas Pillai, Susanne Matthes, Frederiki Melanthiou, Simona Iacobelli, Jan Styczynski, Dan Engelhard, Simone Cesaro
Background: This intercontinental study aimed to study gram-negative rod (GNR) resistance in hematopoietic stem cell transplantation (HSCT). Methods: GNR bacteremias occurring during 6 months post-HSCT (February 2014-May 2015) were prospectively collected, and analyzed for rates and risk factors for resistance to fluoroquinolones, noncarbapenem anti-Pseudomonas β-lactams (noncarbapenems), carbapenems, and multidrug resistance. Results: Sixty-five HSCT centers from 25 countries in Europe, Australia, and Asia reported data on 655 GNR episodes and 704 pathogens in 591 patients (Enterobacteriaceae, 73%; nonfermentative rods, 24%; and 3% others)...
November 13, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29017750/trends-and-relationship-between-antimicrobial-resistance-and-antibiotic-use-in-xinjiang-uyghur-autonomous-region-china-based-on-a-3-year-surveillance-data-2014-2016
#11
Haishaerjiang Wushouer, Zhao-Xia Zhang, Jian-Hua Wang, Ping Ji, Qing-Fang Zhu, Renagu Aishan, Lu-Wen Shi
PURPOSES: The objective of the study was to identify the trends and relations between antimicrobial resistance (AMR) and antibiotic use in the Xinjiang Uyghur Autonomous Region in Western China from 2014 to 2016. METHODS: A retrospective, descriptive analysis of AMR prevalence, and trends and relations between AMR and antibiotic use during the 3-year period was performed. RESULTS: Third-generation cephalosporin-resistant Escherichia coli was the most prevalent resistant pathogen in terms of both resistance density and resistance proportion...
October 7, 2017: Journal of Infection and Public Health
https://www.readbyqxmd.com/read/28942664/-clinical-aspects-of-severe-infections-caused-by-antibiotic-resistant-gram-negative-bacteria-the-empire-strikes-back
#12
János Sinkó
In our days, growing incidence of antibiotic resistant bacteria has become an eminent public health problem. For survival Gram-negative species possess several different tools to withstand antibiotics: they produce degrading and modifying enzymes, decrease their permeability or expel drug molecules. An increasing proportion of severe nosocomial infections are caused by strains resistant to several antimicrobials (multiresistant, extensively resistant or panresistant species). Development of new antibiotic compounds may serve as a possible solution to this problem...
October 2017: Orvosi Hetilap
https://www.readbyqxmd.com/read/28929963/-comparison-of-phenotypic-methods-and-polymerase-chain-reaction-for-the-detection-of-carbapenemase-production-in-clinical-klebsiella-pneumoniae-isolates
#13
Yamaç Tekintaş, Feriha Çilli, Bayrı Eraç, Melike Yaşar, Sabire Şöhret Aydemir, Mine Hoşgör Limoncu
Being a member of the Enterobacteriaceae family, Klebsiella pneumoniae is an opportunistic pathogen that inhabits normal human microbiota and causes predominantly hospital-acquired infections. The emergence of K.pneumoniae isolates which are resistant particularly to the carbapenem group of antibiotics has led to an increase in hospitalization period, mortality and morbidity. Although different rates of resistance are observed between countries, regions and even healthcare facilities, there has been a rapid increase in the prevalence of carbapenem-resistant strains in the last 10 years...
July 2017: Mikrobiyoloji Bülteni
https://www.readbyqxmd.com/read/28893690/new-agents-for-the-treatment-of-infections-with-gram-negative-bacteria-restoring-the-miracle-or-false-dawn
#14
REVIEW
H Wright, R A Bonomo, D L Paterson
BACKGROUND: Antibiotic resistance in Gram-negative resistance has developed without a commensurate response in the successful development of antibiotic agents, though recent progress has been made. AIMS: This review aims to provide a summary of the existing evidence on efficacy, spectrum of activity and the development of resistance of new agents that have been licensed or have completed advanced clinical trials and that possess activity against resistant Gram-negative organisms...
October 2017: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/28859497/first-report-of-coexistence-of-ampc-beta-lactamase-genes-in-klebsiella-pneumoniae-strains-isolated-from-burn-patients
#15
Roya Ghanavati, Davood Darban-Sarokhalil, Fateme Navab-Moghadam, Hossein Kazemian, Gholamreza Irajian, Shabnam Razavi
Klebsiella spp. are among the most frequently isolated bacteria from burn wounds. These organisms are among the most important opportunistic pathogens, causing hospital-acquired and healthcare-associated infections worldwide. Limited information is available about prevalence of AmpC-producing Klebsiella pneumoniae from burn patients. Therefore, the aim of this study was to determine the characterization of AmpC beta-lactamase among K. pneumoniae isolated from burn patients. Samples were collected from wound specimens of patients with burn injury from a burn hospital in Tehran during 18 months (March 2015 to August 2016)...
September 1, 2017: Acta Microbiologica et Immunologica Hungarica
https://www.readbyqxmd.com/read/28822333/virtual-screening-and-repositioning-of-inconclusive-molecules-of-beta-lactamase-bioassays-a-data-mining-approach
#16
Akshata Gad, Andrew Titus Manuel, Jinuraj K R, Lijo John, Sajeev R, Shanmuga Priya V G, Abdul Jaleel U C
This study focuses on the best possible way forward in utilizing inconclusive molecules of PubChem bioassays AID 1332, AID 434987 and AID 434955, which are related to beta-lactamase inhibitors of Mycobacterium tuberculosis (Mtb). The inadequacy in the experimental methods that were observed during the invitro screening resulted in an inconclusive dataset. This could be due to certain moieties present within the molecules. In order to reconsider such molecules, insilico methods can be suggested in place of invitro methods For instance, datamining and medicinal chemistry methods: have been adopted to prioritise the inconclusive dataset into active or inactive molecules...
July 29, 2017: Computational Biology and Chemistry
https://www.readbyqxmd.com/read/28799307/guiding-principles-for-the-use-of-fluroquinolones-in-out-patient-community-settings-of-india-panel-consensus
#17
Agam Vora, K Krishnaprasad
INTRODUCTION: Respiratory tract infections have been an important cause of morbidity and mortality worldwide that is looming large especially in context of antibiotic resistance that is confronted both by a pulmonologist as well as a general practitioner. A reflection to this trend has been the rising phenomenon of MICs as shown the respiratory pathogens towards conventional antibiotics including macrolides or β lactam/β lactamase inhibitor combinations. Respiratory fluoroquinolones offer broad yet potent cover of respiratory pathogens leading to their obvious choice for empirical therapy for clinical persisters or high risk cases with prior history of antibiotics not-withstanding the clinical concerns in tropical countries...
August 2017: Journal of the Association of Physicians of India
https://www.readbyqxmd.com/read/28697720/early-onset-pneumonia-after-liver-transplant-microbial-causes-risk-factors-and-outcomes-mansoura-university-egypt-experience
#18
Mohammad Khairy El-Badrawy, Raed El-Metwaly Ali, Amr Yassen, Mohammad Ahmad AbouElela, Rehab Ahmad Elmorsey
OBJECTIVES: Pneumonia has a negative effect on the outcome of liver transplant. Our aim was to analyze early-onset pneumonia that developed within the first month after transplant. MATERIALS AND METHODS: This prospective single-center study included 56 adult living-donor liver transplant recipients; those who developed early-onset pneumonia based on clinical and radiologic criteria were investigated as to causative pathogens and then followed up and compared with other recipients without pneumonia to illustrate risk factors, outcomes, and related mortality of posttransplant pneumonia...
October 2017: Experimental and Clinical Transplantation
https://www.readbyqxmd.com/read/28634829/potential-inhibitory-effect-of-indolizine-derivatives-on-the-two-enzymes-nicotinamide-phosphoribosyltransferase-and-beta-lactamase-a-molecular-dynamics-study
#19
Beata Szefler, Przemysław Czeleń
Nicotinamide phosphoribosyl-transferases (NAMPT) are enzymes that play a role in targeting cancer metabolism, while beta lactamases are involved in bacterial resistance to beta-lactam antibiotics. Many protein inhibitors exhibit such property which is often correlated with their cellular potency. In order to understand such a phenomenon, the present article conducts an analysis of the dynamic behavior of complexes formed by the inhibitors, that is indolizine derivatives, with the studied enzymes. Both docking and molecular dynamics led to identification of their interactions and showed the mechanism of inhibition of the two studied enzymes...
July 2017: Journal of Molecular Modeling
https://www.readbyqxmd.com/read/28631121/-prudent-use-of-antimicrobial-prophylaxis-prevention-of-increasing-antibiotic-resistance
#20
REVIEW
C Hein, A Pilatz, F M E Wagenlehner
BACKGROUND: The use of peri-operative antimicrobial prophylaxis during urological procedures to prevent postoperative complications is very common. OBJECTIVES: What kind of recommendations for reasonable use of peri-operative antimicrobial prophylaxis during urological procedures to prevent increasing antibiotic resistance and postoperative complications exist? METHODS: Review of evidence-based recommendations from literature and current Guidelines of the EAU...
June 19, 2017: Der Urologe. Ausg. A
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