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Multidrug-resistant Organism

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https://www.readbyqxmd.com/read/27909713/age-associated-differences-in-transporter-gene-expression-in-kidneys-of-male-rats
#1
Yong-Ji Xu, Yang Wang, Yuan-Fu Lu, Shang-Fu Xu, Qin Wu, Jie Liu
Kidney transporters are involved in the secretion and reabsorption of endogenous and exogenous molecules. Numerous factors may influence their expression and affect drug disposition, efficacy and toxicity. The present study aimed to examine the development‑ and age‑associated variations in primary renal transporters in rats, including 6 uptake transporters: Organic anion transporter (OAT) 1 and 3, organic cation transporter (OCT) 1, 2 and 3 and organic anion‑transporting polypeptide (OATP) 4C1, and 6 efflux transporters: Multidrug resistance protein 1 (MDR1), breast cancer resistance protein (BCRP), multidrug resistance‑associated protein (MRP) 2 and 4, and multidrug and toxin extrusion protein (MATE) 1 and 2‑K...
November 28, 2016: Molecular Medicine Reports
https://www.readbyqxmd.com/read/27902433/escherichia-coli-clonal-group-a-cga-among-uropathogenic-infections-in-mexico-city
#2
Angel Manjarrez-Hernandez, José Molina-López, Sandra Gavilanes-Parra, Rigoberto Hernandez-Castro
Escherichia coli clonal group A (CGA) causes urinary tract and other extraintestinal infections in humans. CGA is an important cause of trimethoprim/sulfamethoxazole (SXT)-resistance in extraintestinal pathogens. We examined the extent to which resistance in this area is related to CGA dissemination of E. coli from urinary tract infections (UTIs) in Mexico City. The virulence backgrounds of the isolates were also characterized. In this study, the frequency of resistance to SXT used for UTI treatment was high (56-65%) and CGA isolates accounted for 9 of the 78 SXT-resistant isolates (11...
November 7, 2016: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/27898030/assessment-of-the-activity-of-tigecycline-against-gram-positive-and-gram-negative-organisms-collected-from-italy-between-2012-and-2014-as-part-of-the-tigecycline-evaluation-and-surveillance-trial-t-e-s-t
#3
Stefania Stefani, Michael J Dowzicky
As part of the Tigecycline Evaluation and Surveillance Trial (T.E.S.T) we report the in vitro activity of tigecycline and its comparators against Gram-negative and Gram-positive organisms collected from Italian centers between 2012 and 2014. Minimum inhibitory concentrations were determined according to the broth microdilution methodology of the Clinical and Laboratory Standards Institute, and antimicrobial resistance was determined using the European Committee on Antimicrobial Susceptibility Testing interpretive criteria...
November 26, 2016: Pharmaceuticals
https://www.readbyqxmd.com/read/27887595/antimicrobial-stewardship-of-chinese-ministry-of-health-reduces-multidrug-resistant-organism-isolates-in-critically-ill-patients-a-pre-post-study-from-a-single-center
#4
Xudong Ma, Jianfeng Xie, Yi Yang, Fengmei Guo, Zhiwei Gao, Hua Shao, Yingzi Huang, Congshan Yang, Haibo Qiu
BACKGROUND: China's Ministry of Health (MOH) has established a policy about the antimicrobial stewardship. To date, the effects of this policy on multidrug-resistant organism (MDRO) in critically ill patients are unknown. METHODS: A pre-post study was conducted on intensive care unit (ICU) patients from June 2010 to May 2011 and from June 2012 to May 2013. Bacterial cultures were conducted at ICU admission and discharge. In June 2011, our hospital started to administer the antimicrobial stewardship program of Chinese MOH...
November 25, 2016: BMC Infectious Diseases
https://www.readbyqxmd.com/read/27884325/violet-405-nm-light-a-novel-therapeutic-agent-against-common-pathogenic-bacteria
#5
Mitchell D Barneck, Nathaniel L R Rhodes, Martin de la Presa, James P Allen, Ahrash E Poursaid, Maziar M Nourian, Matthew A Firpo, John T Langell
BACKGROUND: The increasing incidence of healthcare-associated infections (HAIs) and multidrug-resistant organisms demonstrate the need for innovative technological solutions. Staphylococcus aureus, Streptococcus pneumonia, Escherichia coli, and Pseudomonas aeruginosa in particular are common pathogens responsible for a large percentage of indwelling medical device-associated clinical infections. The bactericidal effects of visible light sterilization (VLS) using 405-nm is one potential therapeutic under investigation...
December 2016: Journal of Surgical Research
https://www.readbyqxmd.com/read/27868317/comparative-testing-of-disinfectant-efficacy-on-planktonic-bacteria-and-bacterial-biofilms-using-a-new-assay-based-upon-kinetic-analysis-of-metabolic-activity
#6
Frank Günther, Martin Scherrer, Stefan J Kaiser, Annalisa DeRosa, Nico T Mutters
AIMS: The aim of our study was to develop a new reproducible method for disinfectant efficacy testing on bacterial biofilms and to evaluate the efficacy of different disinfectants against biofilms. Clinical multidrug-resistant strains were chosen as test isolates to ensure practical relevance. METHODS AND RESULTS: We compared the standard qualitative suspension assay for disinfectant testing, which does not take into account biofilm formation, to the new biofilm viability assay that uses kinetic analysis of metabolic activity in biofilms after disinfectant exposure to evaluate disinfectant efficacy...
November 21, 2016: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/27855693/modelling-the-effect-of-short-course-multidrug-resistant-tuberculosis-treatment-in-karakalpakstan-uzbekistan
#7
James M Trauer, Jay Achar, Nargiza Parpieva, Atadjan Khamraev, Justin T Denholm, Dennis Falzon, Ernesto Jaramillo, Anita Mesic, Philipp du Cros, Emma S McBryde
BACKGROUND: Multidrug-resistant tuberculosis (MDR-TB) is a major threat to global TB control. MDR-TB treatment regimens typically have a high pill burden, last 20 months or more and often lead to unsatisfactory outcomes. A 9-11 month regimen with seven antibiotics has shown high success rates among selected MDR-TB patients in different settings and is conditionally recommended by the World Health Organization. METHODS: We construct a transmission-dynamic model of TB to estimate the likely impact of a shorter MDR-TB regimen when applied in a low HIV prevalence region of Uzbekistan (Karakalpakstan) with high rates of drug resistance, good access to diagnostics and a well-established community-based MDR-TB treatment programme providing treatment to around 400 patients...
November 18, 2016: BMC Medicine
https://www.readbyqxmd.com/read/27853743/a-novel-adjunctive-cleansing-method-to-reduce-colony-forming-units-on-duodenoscopes
#8
Karl Kwok, Joseph Chang, Simon Lo, Andrew Giap, Brian Lim, Bechien Wu
Background and study aims: Endoscopic retrograde cholangiopancreatography-related infections are of increasing global concern due to the emergence of multidrug-resistant bacteria such as carbapenem-resistant enterobacteriaceae (CRE), with bacterial biofilm production postulated as one cause of persistent infection from such virulent organisms. Because N-acetylcysteine (NAC) has been shown to possess antibacterial and biofilm-disruption properties, we aimed to evaluate if NAC would demonstrate clinical utility in reducing the colony forming units (CFU) at the elevator end of a duodenoscope, one of the hardest areas to clean...
November 2016: Endoscopy International Open
https://www.readbyqxmd.com/read/27850265/626-multidrug-resistant-organism-sepsis-in-pediatric-liver-transplant-recipients-a-burgeoning-problem
#9
Alicia Alcamo, Lauren Alessi, S Noona Vehovic, Diana Pang, Geoffrey Bond, Joseph Carcillo, Marian Michaels, Raj Aneja
No abstract text is available yet for this article.
December 2016: Critical Care Medicine
https://www.readbyqxmd.com/read/27847005/epidemiology-of-multidrug-resistant-extensively-drug-resistant-and-totally-drug-resistant-tuberculosis-in-middle-east-countries
#10
REVIEW
Mohanad M Ahmed, Ali A Velayati, Suhad H Mohammed
The 2015 represent the deadline for the global tuberculosis (TB) targets set through the Millennium Development Goals (MDG). From 2016 and onward, new goals were set to end the global TB epidemic via implementing new campaign entitled "the End TB Strategy". The major hurdle to end TB epidemic in several parts of the world is the emergence and spread of drug resistant Mycobacterium tuberculosis (MTB) strains. The better understanding of the actual global burden of drug resistant tuberculosis would feed into better implementing the End TB Strategy...
September 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/27845849/an-experimental-model-for-the-rapid-screening-of-compounds-with-potential-use-against-mycobacteria
#11
Sofia Santos Costa, Elizeth Lopes, Elisa Azzali, Diana Machado, Tatiane Coelho, Pedro Eduardo Almeida da Silva, Miguel Viveiros, Marco Pieroni, Isabel Couto
Infections caused by Mycobacterium tuberculosis and other mycobacteria are major challenges for global public health. Particularly worrisome are infections caused by multidrug-resistant bacteria, which are increasingly difficult to treat because of the loss of efficacy of the current antibacterial agents, a problem that continues to escalate worldwide. There has been a limited interest and investment on the development of new antibacterial agents in the past decades. This has led to the current situation, in which there is an urgent demand for innovative therapeutic alternatives to fight infections caused by multidrug-resistant pathogens, such as multidrug-resistant tuberculosis...
November 2016: Assay and Drug Development Technologies
https://www.readbyqxmd.com/read/27842868/epidemiology-of-staphylococcus-aureus-in-italy-first-nationwide-survey-2012
#12
Floriana Campanile, Dafne Bongiorno, Marianna Perez, Gino Mongelli, Laura Sessa, Sabrina Benvenuto, Floriana Gona, Pietro E Varaldo, Stefania Stefani
A 3-month epidemiological study to determine the prevalence and antibiotic resistance of Staphylococcus aureus nosocomial infections was performed in 52 centres throughout Italy in 2012. A total of 21,873 pathogens were analysed. The prevalence of S. aureus among all nosocomial pathogens isolated in that period was 11.6% (n=2541), whilst the prevalence of methicillin-resistant S. aureus (MRSA) among the S. aureus was 35.8% (n=910). All tested antimicrobials demonstrated ≥92.2% susceptibility against methicillin-susceptible S...
December 2015: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/27836793/european-policies-in-the-management-of-tuberculosis-among-migrants
#13
Lia D'Ambrosio, Rosella Centis, Masoud Dara, Ivan Solovic, Giorgia Sulis, Alimuddin Zumla, Giovanni Battista Migliori
Globally 10.4 million new TB incident cases were estimated to have occurred in 2015, of which 3% were reported in the European Region of the World Health Organization. Importantly, about 25% of the global multidrug-resistant TB (MDR-TB) cases are reported in the European Region, representing one of the greatest challenges of TB control particularly in Former Soviet Union Countries. Over a quarter of TB cases in the European Union and European Economic Area (EU/EEA) are reported among foreign-born individuals...
November 8, 2016: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/27834195/cftr-associated-ligand-cal-is-a-negative-regulator-of-mrp2-expression
#14
Man Li, Carol J Soroka, Kathy Harry, James L Boyer
The multidrug resistance-associated protein 2 (Mrp2) is an ATP-binding cassette transporter that transports a wide variety of organic anions across the apical membrane of epithelial cells. The expression of Mrp2 on the plasma membrane is regulated by protein-protein interactions. CFTR-associated ligand (CAL) interacts with transmembrane proteins via its PDZ domain and reduces their cell surface expression by increasing lysosomal degradation and intracellular retention. Our results showed that CAL is localized at the trans-Golgi network of rat hepatocytes...
November 9, 2016: American Journal of Physiology. Cell Physiology
https://www.readbyqxmd.com/read/27826141/rapid-antimicrobial-susceptibility-test-for-identification-of-new-therapeutics-and-drug-combinations-against-multidrug-resistant-bacteria
#15
Wei Sun, Rebecca A Weingarten, Miao Xu, Noel Southall, Sheng Dai, Paul Shinn, Philip E Sanderson, Peter R Williamson, Karen M Frank, Wei Zheng
Current antimicrobial susceptibility testing has limited screening capability for identifying empirical antibiotic combinations to treat severe bacterial infections with multidrug-resistant (MDR) organisms. We developed a new antimicrobial susceptibility assay using automated ultra-high-throughput screen technology in combination with a simple bacterial growth assay. A rapid screening of 5170 approved drugs and other compounds identified 25 compounds with activities against MDR Klebsiella pneumoniae. To further improve the efficacy and reduce the effective drug concentrations, we applied a targeted drug combination approach that integrates drugs' clinical antimicrobial susceptibility breakpoints, achievable plasma concentrations, clinical toxicities and mechanisms of action to identify optimal drug combinations...
November 9, 2016: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/27825443/natural-competence-for-transformation
#16
Melanie Blokesch
While most molecular biologists are familiar with the artificial transformation of bacteria in the context of laboratory cloning experiments, natural competence for transformation refers to a specific physiological state in which prokaryotes are able to take up genetic material from their surroundings. Occasionally, such absorbed DNA is recombined into the organism's own genome, resulting in natural transformation (Figure 1). As a consequence, natural competence for transformation is considered a primary mode of horizontal gene transfer (HGT) in prokaryotes, together with conjugation (direct cell to cell transfer of DNA via a specialized conjugal pilus) and phage transduction (DNA transfer mediated by viruses)...
November 7, 2016: Current Biology: CB
https://www.readbyqxmd.com/read/27818808/persistent-bacteremia-from-pseudomonas-aeruginosa-with-in-vitro-resistance-to-the-novel-antibiotics-ceftolozane-tazobactam-and-ceftazidime-avibactam
#17
Louie Mar Gangcuangco, Patricia Clark, Cynthia Stewart, Goran Miljkovic, Zane K Saul
Ceftazidime-avibactam and ceftolozane-tazobactam are new antimicrobials with activity against multidrug-resistant Pseudomonas aeruginosa. We present the first case of persistent P. aeruginosa bacteremia with in vitro resistance to these novel antimicrobials. A 68-year-old man with newly diagnosed follicular lymphoma was admitted to the medical intensive care unit for sepsis and right lower extremity cellulitis. The patient was placed empirically on vancomycin and piperacillin-tazobactam. Blood cultures from Day 1 of hospitalization grew P...
2016: Case Reports in Infectious Diseases
https://www.readbyqxmd.com/read/27818775/characterization-and-antimicrobial-susceptibility-of-one-antibiotic-sensitive-and-one-multidrug-resistant-corynebacterium-kroppenstedtii-strain-isolated-from-patients-with-granulomatous-mastitis
#18
I Fernández-Natal, D Rodríguez-Lázaro, T Marrodán-Ciordia, J A Sáez-Nieto, S Valdezate, H Rodríguez-Pollán, A Tauch, F Soriano
Human infections associated with Corynebacterium kroppenstedtii are rarely reported, and this organism is usually described as antibiotic sensitive. Almost all published cases of C. kroppenstedtii infections have been associated with breast pathology in women and have been described in New Zealand, France, Canada, India and Japan. Here we describe the microbiologic characteristics of two strains isolated from two women diagnosed of granulomatous mastitis in Spain. One C. kroppenstedtii isolate was antibiotic sensitive while the other was multidrug resistant...
November 2016: New Microbes and New Infections
https://www.readbyqxmd.com/read/27818361/classifying-new-anti-tb-drugs-rationale-and-future-perspectives
#19
Simon Tiberi, Anna Scardigli, Rosella Centis, Lia D'Ambrosio, Marcela Muñoz-Torrico, Miguel Ángel Salazar-Lezama, Antonio Spanevello, Dina Visca, Alimuddin Zumla, Giovanni Battista Migliori, Jose A Caminero Luna
The classification of anti-tuberculosis (TB) drugs is important as it serves the clinician in building an appropriate anti-TB regimen for multidrug (MDR-) and extensively drug resistant (XDR-) TB cases which do not fulfil criteria for the shorter MDR-TB regimen. The World Health Organization (WHO) has recently approved a revision of the classification of new anti-TB drugs based on current evidence on each drug. In the previous WHO guidelines the drug choice was based on their efficacy and toxicity, in a step-down manner from Group 1, including first-line drugs and Group 2-5 including second- line drugs, to Group 5 including drugs with potentially limited efficacy or limited clinical evidence...
November 3, 2016: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/27817759/status-of-the-prevention-of-multidrug-resistant-organisms-in-international-settings-a-survey-of-the-society-for-healthcare-epidemiology-of-america-research-network
#20
Nasia Safdar, Sharmila Sengupta, Jackson S Musuuza, Manisha Juthani-Mehta, Marci Drees, Lilian M Abbo, Aaron M Milstone, Jon P Furuno, Meera Varman, Deverick J Anderson, Daniel J Morgan, Loren G Miller, Graham M Snyder
OBJECTIVE To examine self-reported practices and policies to reduce infection and transmission of multidrug-resistant organisms (MDRO) in healthcare settings outside the United States. DESIGN Cross-sectional survey. PARTICIPANTS International members of the Society for Healthcare Epidemiology of America (SHEA) Research Network. METHODS Electronic survey of infection control and prevention practices, capabilities, and barriers outside the United States and Canada. Participants were stratified according to their country's economic development status as defined by the World Bank as low-income, lower-middle-income, upper-middle-income, and high-income...
November 7, 2016: Infection Control and Hospital Epidemiology
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