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https://www.readbyqxmd.com/read/28425478/data-intensive-genome-level-analysis-for-identifying-novel-non-toxic-drug-targets-for-multi-drug-resistant-mycobacterium-tuberculosis
#1
Divneet Kaur, Rintu Kutum, Debasis Dash, Samir K Brahmachari
We report the construction of a novel Systems Biology based virtual drug discovery model for the prediction of non-toxic metabolic targets in Mycobacterium tuberculosis (Mtb). This is based on a data-intensive genome level analysis and the principle of conservation of the evolutionarily important genes. In the 1623 sequenced Mtb strains, 890 metabolic genes identified through a systems approach in Mtb were evaluated for non-synonymous mutations. The 33 genes showed none or one variation in the entire 1623 strains, including 1084 Russian MDR strains...
April 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28421881/factors-pivotal-for-designing-of-nanoantimicrobials-an-exposition
#2
Bushra Jamil, Muhammad Imran
Understanding the interplay between bacterial pathogens and antimicrobials is a key to realize the control over infections causing morbidity and mortality. An important current issue of contemporary medicine and microbiology is the search for new strategies for adequate therapy of infectious diseases associated with rapidly emerging multidrug-resistant (MDR) pathogens. Recently, a great deal of progress has been made in the field of nanobiotechnology towards the development of various nanoantimicrobials (NAMs) as novel therapeutic solution...
April 19, 2017: Critical Reviews in Microbiology
https://www.readbyqxmd.com/read/28419240/from-nano-to-micro-using-nanotechnology-to-combat-microorganisms-and-their-multidrug-resistance
#3
Michal Natan, Ehud Banin
The spread of antibiotic resistance and increasing prevalence of biofilm-associated infections is driving demand for new means to treat bacterial infection. Nanotechnology provides an innovative platform for addressing this challenge, with potential to manage even infections involving multidrug-resistant (MDR) bacteria. The current review summarizes recent progress over the last 2 years in the field of antibacterial nanodrugs, and describes their unique properties, mode of action and activity against MDR bacteria and biofilms...
April 13, 2017: FEMS Microbiology Reviews
https://www.readbyqxmd.com/read/28412932/isolation-of-enterococci-their-antimicrobial-susceptibility-patterns-and-associated-factors-among-patients-attending-at-the-university-of-gondar-teaching-hospital
#4
Amelework Yilema, Feleke Moges, Sisay Tadele, Mengistu Endris, Afework Kassu, Wondwossen Abebe, Getnet Ayalew
BACKGROUND: Enterococci become clinically important especially in immune compromised patients and important causes of nosocomial infections. Data on the prevalence, antimicrobial susceptibility patterns and associated factors of enterococci are scarce in Ethiopia. METHODS: A hospital based cross-sectional study was conducted at the University of Gondar Teaching Hospital from February 28, 2014 to May 1, 2014. Pretested structured questionnaire was used to collect socio-demographic data and possible associated factors of enterococci infections...
April 17, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28412382/use-of-nebulized-antimicrobials-for-the-treatment-of-respiratory-infections-in-invasively-mechanically-ventilated-adults-a-position-paper-from-the-european-society-of-clinical-microbiology-and-infectious-diseases
#5
Jordi Rello, Candela Solé-Lleonart, Jean-Jacques Rouby, Jean Chastre, Stijn Blot, Garyfallia Poulakou, Charles-Edouard Luyt, Jordi Riera, Lucy B Palmer, Jose M Pereira, Tim Felton, Jayesh Dhanani, Matteo Bassetti, Tobias Welte, Jason A Roberts
With an established role in cystic fibrosis and bronchiectasis, nebulized antibiotics are increasingly being used to treat respiratory infections in critically ill invasively mechanically ventilated adult patients. Although there is limited evidence describing their efficacy and safety, in an era of need for new strategies to enhance antibiotic effectiveness because of a shortage of new agents and increases in antibiotic resistance, the potential of nebulization of antibiotics to optimize therapy is considered of high interest, particularly in patients infected with multidrug-resistant (MDR) pathogens...
April 13, 2017: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/28409644/amphiphilic-tobramycin-lysine-conjugates-sensitize-multidrug-resistant-gram-negative-bacteria-to-rifampicin-and-minocycline
#6
Yinfeng Lyu, Xuan Yang, Sudeep Goswami, Bala Kishan Gorityala, Temilolu Idowu, Ronald Domalaon, George G Zhanel, Anshan Shan, Frank M Schweizer
Chromosomally-encoded low membrane permeability and highly efficient efflux systems are major mechanisms by which Pseudomonas aeruginosa evades antibiotic actions. Our previous reports have shown that amphiphilic tobramycin-fluoroquinolone hybrids can enhance efficacy of fluoroquinolone antibiotics against multidrug-resistant (MDR) P. aeruginosa isolates. Herein, we report on a novel class of tobramycin-lysine conjugates containing an optimized amphiphilic tobramycin-C12 tether which sensitize Gram-negative bacteria to legacy antibiotics...
April 14, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28407430/chronic-urinary-tract-infections-in-patients-with-spinal-cord-lesions-biofilm-infection-with-need-for-long-term-antibiotic-treatment
#7
REVIEW
Nete Tofte, Alex C Y Nielsen, Hannah Trøstrup, Christine B Andersen, Michael Von Linstow, Birgitte Hansen, Fin Biering-Sørensen, Niels Høiby, Claus Moser
Patients suffering from spinal cord injuries resulting in complete or incomplete paraplegia or tetraplegia are highly disposed to frequent, recurrent or even chronic urinary tract infections (UTIs). The reason for the increased risk of acquiring UTIs is multifactorial, including reduced sensation of classical UTI symptoms, incomplete bladder emptying, frequent catheterizations or chronic urinary tract catheters. Biofilms in relation to UTIs have been shown both on catheters, on concrements or as intracellular bacterial communities (IBCs)...
April 2017: APMIS: Acta Pathologica, Microbiologica, et Immunologica Scandinavica
https://www.readbyqxmd.com/read/28399372/a-tobramycin-vector-enhances-synergy-and-efficacy-of-efflux-pump-inhibitors-against-multidrug-resistant-gram-negative-bacteria
#8
Xuan Yang, Sudeep Goswami, Bala Kishan Gorityala, Ronald Domalaon, Yinfeng Lyu, Ayush Kumar, George G Zhanel, Frank M Schweizer
Drug efflux mechanisms interact synergistically with the outer membrane permeability barrier of Gram-negative bacteria leading to intrinsic resistance that presents a major challenge for antibiotic drug development. Efflux pump inhibitors (EPIs) which block the efflux of antibiotics synergize antibiotics but the clinical development of EPI/antibiotic combination therapy to treat multidrug-resistant (MDR) Gram-negative infections has been challenging. This is in part caused by the inefficiency of current EPIs to penetrate the outer membrane and resist efflux...
April 11, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28397262/extended-spectrum-%C3%AE-lactamase-producing-escherichia-coli-and-klebsiella-pneumoniae-critical-tools-for-antibiotic-resistance-pattern
#9
REVIEW
Nagarajan Padmini, Antony Alex Kennedy Ajilda, Natesan Sivakumar, Gopal Selvakumar
Drug resistance is a phenomenon where by an organism becomes fully or partially resistant to drugs or antibiotics being used against it. Antibiotic resistance poses an exacting intimidation for people with underlying medical immune conditions or weakened immune systems. Infections caused by the enzyme extended spectrum β-lactamase (ESBL) producing multi drug resistance (MDR) Enterobacteriaceae especially Escherichia coli and Klebsiella pneumoniae are resistant to a broad range of beta lactams, including third generation cephalosporins...
April 11, 2017: Journal of Basic Microbiology
https://www.readbyqxmd.com/read/28396543/a-topical-hydrogel-with-deferiprone-and-gallium-protoporphyrin-targets-bacterial-iron-metabolism-and-has-antibiofilm-activity
#10
Katharina Richter, Nicky Thomas, Jolien Claeys, Jonathan McGuane, Clive A Prestidge, Tom Coenye, Peter-John Wormald, Sarah Vreugde
Many infectious diseases are associated with multidrug-resistant (MDR) bacteria residing in biofilms that require high antibiotic concentrations. Whilst oral drug-delivery is frequently ineffective, topical treatments have the potential to deliver higher drug concentrations to the infection-site while reducing systemic side-effects.This study determined the antibiofilm activity of a surgical wound-gel loaded with the iron-chelator deferiprone (Def) and the heme-analogue gallium-protoporphyrin (GaPP), alone and in combination with ciprofloxacin...
April 10, 2017: Antimicrobial Agents and Chemotherapy
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/28389536/whole-genome-sequencing-of-drug-resistant-salmonella-enterica-isolated-from-dairy-cattle-and-humans-in-new-york-and-washington-states-reveals-source-and-geographic-associations
#12
Laura M Carroll, Martin Wiedmann, Henk den Bakker, Julie Siler, Steven Warchocki, David Kent, Svetlana Lyalina, Margaret Davis, William Sischo, Thomas Besser, Lorin D Warnick, Richard V Pereira
Multidrug-resistant (MDR) Salmonella enterica can be spread from cattle to humans through direct contact with animals shedding Salmonella, as well as through the food chain, making MDR Salmonella a serious threat to human health. The objective of this study was to use whole-genome sequencing to compare antimicrobial-resistant (AMR) S. Typhimurium, Newport, and Dublin isolated from dairy cattle and humans in Washington state and New York state at a genotypic and phenotypic level. A total of 90 isolates were selected for the study (37 Typhimurium, 32 Newport, 21 Dublin)...
April 7, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28386474/finding-novel-antibiotic-substances-from-medicinal-plants-antimicrobial-properties-of-nigella-sativa-directed-against-multidrug-resistant-bacteria
#13
Seher Nancy Bakal, Stefan Bereswill, Markus M Heimesaat
The progressive rise in multidrug-resistant (MDR) bacterial strains poses serious problems in the treatment of infectious diseases. While the number of newly developed antimicrobial compounds has greatly fallen, the resistance of pathogens against commonly prescribed drugs is further increasing. This rise in resistance illustrates the need for developing novel therapeutic and preventive antimicrobial options. The medicinal herb Nigella sativa and its derivatives constitute promising candidates. In a comprehensive literature survey (using the PubMed data base), we searched for publications on the antimicrobial effects of N...
March 2017: European Journal of Microbiology & Immunology
https://www.readbyqxmd.com/read/28384882/polymyxin-b-induced-diffuse-cutaneous-hyperpigmentation
#14
Sandeep Lahiry, Shouvik Choudhury, Ayan Mukherjee, Prajesh Kiran Bhunya, Moumita Bala
Polymyxin B is a polypeptide-antibiotic, primarily used for resistant Gram-negative infections, first obtained from bacterium Bacillus polymyxa in the late 1940s. Antibiotic spectrum are restricted to mainly gram negative bacterias like Enterobacter, E. coli, Klebsiella, Salmonella, Pasteurella, Bordetella, Shigella; and particularly organisms like Pseudomonas aeruginosa and Acinetobacter baumannii, which are extremely potent to acquire antibiotic resistance. Side effects include neurotoxicity and acute renal tubular necrosis...
February 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28384861/molecular-characterization-of-multidrug-resistant-strains-of-acinetobacter-baumannii-isolated-from-intensive-care-units-in-west-of-iran
#15
Parviz Mohajeri, Abbas Farahani, Rasa Sheini Mehrabzadeh
INTRODUCTION: According to the results of various studies using phenotypic methods, the prevalence of Multidrug Resistant (MDR) Acinetobacter baumannii (A. baumannii) isolates has been increasing worldwide. Pulsed-Field Gel Electrophoresis (PFGE) technique is known as the gold standard method to determine clonal characterization of bacterial species, especially A. baumannii. AIM: To determine the clonal relatedness and investigate the prevalence of integron classes 1 and 2 and genes encoding OXA-23 and 24 in A...
February 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28376315/safety-and-efficacy-of-a-novel-drug-elores-ceftriaxone-sulbactam-disodium-edetate-in-the-management-of-multi-drug-resistant-bacterial-infections-in-tertiary-care-centers-a-post-marketing-surveillance-study
#16
Manu Chaudhary, Mohd Amin Mir, Shiekh Gazalla Ayub
OBJECTIVE: In India, elores (CSE-1034: ceftriaxone+sulbactam+disodium edetate) was approved as a broad spectrum antibiotic in year 2011 and is used for management of ESBL/MBL infections in tertiary care centers. The objective of this study was to investigate the efficacy of this drug in patients with ESBL/MBL infections and identify the incidence of adverse events in real clinical settings. METHODS: This PMS study was conducted at 17 centers across India and included 2500 patients of all age groups suffering from various bacterial infections and treated with CSE-1034...
April 1, 2017: Brazilian Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28375673/distribution-and-antimicrobial-susceptibility-of-foodborne-salmonella-serovars-in-eight-provinces-in-china-from-2007-to-2012-except-2009
#17
Yin Wang, Chenyang Cao, Walid Q Alali, Shenghui Cui, Fengqin Li, Jianghui Zhu, Xin Wang, Jianghong Meng, Baowei Yang
One thousand four hundred ninety-one Salmonella isolates recovered from retail foods including chicken, beef, fish, pork, dumplings, and cold dishes in China in 2007, 2008, 2010, 2011, and 2012 were analyzed for distribution of serotype and antimicrobial susceptibility. A total of 129 Salmonella serotypes were detected among 1491 isolates. Salmonella Enteritidis (21.5%), Typhimurium (11.0%), Indiana (10.8%), Thompson (5.4%), Derby (5.1%), Agona (3.8%), and Shubra (3.0%) were the seven most important serotypes in 1491 isolates...
April 4, 2017: Foodborne Pathogens and Disease
https://www.readbyqxmd.com/read/28374267/risk-factors-for-and-outcomes-of-multidrug-resistant-escherichia-coli-infections-in-children
#18
Adaora S Uzodi, Christine M Lohse, Ritu Banerjee
INTRODUCTION: The recent increase in multidrug-resistant (MDR) Escherichia coli infections is not well described in children. We determined the risk factors and outcomes of extraintestinal E. coli infections in children in our region. METHODS: We conducted a retrospective cohort study of children ≤18 years in Olmsted County, MN, USA, between January 1, 2012 and December 31, 2012. MDR isolates were defined as resistant to ≥3 antibiotic classes. RESULTS: A total of 368 children each contributed 1 isolate...
April 3, 2017: Infectious Diseases and Therapy
https://www.readbyqxmd.com/read/28373776/severe-infection-with-multidrug-resistant-salmonella-choleraesuis-in-a-young-patient-with-primary-sclerosing-cholangitis
#19
Philip G Ferstl, Claudia Reinheimer, Katalin Jozsa, Stefan Zeuzem, Volkhard Aj Kempf, Oliver Waidmann, Georgios Grammatikos
Massive global spread of multidrug-resistant (MDR) Salmonella spp. expressing extended-spectrum beta-lactamase (ESBL) and additional resistance to fluoroquinolones has often been attributed to high international mobility as well as excessive use of oral antibiotics in livestock farming. However, MDR Salmonella spp. have not been mentioned as a widespread pathogen in clinical settings so far. We demonstrate the case of a 25-year-old male with primary sclerosing cholangitis who tested positive for MDR Salmonella enterica serotype Choleraesuis expressing ESBL and fluoroquinolone resistance...
March 21, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28373189/increased-mortality-associated-with-bloodstream-infections-caused-by-pseudomonas-aeruginosa-as-compared-to-other-bacteria-results-of-a-13-year-prospective-cohort-study
#20
Joshua T Thaden, Lawrence P Park, Stacey A Maskarinec, Felicia Ruffin, Vance G Fowler, David van Duin
The impact of bacterial species on outcome in bloodstream infections (BSI) is incompletely understood. We evaluated the impact of bacterial species on BSI mortality, with adjustment for patient, bacterial, and treatment factors. From 2002-2015, all adult inpatients with monomicrobial BSI caused by Staphylococcus aureus or Gram-negative bacteria at Duke University Medical Center were prospectively enrolled. Kaplan-Meier curves and multivariable Cox regression with propensity score models were used to examine species-specific bacterial BSI mortality...
April 3, 2017: Antimicrobial Agents and Chemotherapy
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