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https://www.readbyqxmd.com/read/29040608/risk-factors-for-resistance-and-mdr-in-community-urine-isolates-population-level-analysis-using-the-nhs-scotland-infection-intelligence-platform
#1
William Malcolm, Eilidh Fletcher, Kimberley Kavanagh, Ashutosh Deshpande, Camilla Wiuff, Charis Marwick, Marion Bennie
Background: Urinary tract infections (UTIs) are common. Antibiotic treatment is usually empirical, with the risk of under-treatment of resistant infections. Objectives: To characterize risk factors for antibiotic-resistant community urine isolates using routine record-linked health data. Methods: Within the NHS Scotland Infection Intelligence Platform, national surveillance patient-level data on community urine isolates (January 2012-June 2015) were linked to hospital activity and community prescribing data...
October 10, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/29034110/toll-like-receptor-4-dependent-inflammatory-responses-following-intestinal-colonization-of-secondary-abiotic-il10-deficient-mice-with-multidrug-resistant-pseudomonas-aeruginosa
#2
Anne Grunau, Ulrike Escher, Stefan Bereswill, Markus M Heimesaat
The rising incidences of infections with multidrug-resistant (MDR) Gram-negative bacteria including Pseudomonas aeruginosa (PA) have gained increasing attention in medicine, but also in the general public and global health politics. The mechanisms underlying opportunistic pathogen-host interactions are unclear, however. To address this, we challenged secondary abiotic IL10(-/-) mice deficient for Toll-like receptor-4 (TLR4(-/-) × IL10(-/-)), the main receptor of the Gram-negative cell wall constituent lipopolysaccharide, with a clinical MDR PA isolate...
September 2017: European Journal of Microbiology & Immunology
https://www.readbyqxmd.com/read/29033110/investigating-of-four-main-carbapenem-resistance-mechanisms-in-high-level-carbapenem-resistant-pseudomonas-aeruginosa-isolated-from-burn-patients
#3
Soodabeh Rostami, Ahmad Farajzadeh Sheikh, Saeed Shoja, Abbas Farahani, Mohammad Amin Tabatabaiefar, Abbas Jolodar, Raheleh Sheikhi
BACKGROUND: Pseudomonas aeruginosa is an opportunistic pathogen involved in many infections. Carbapenem-resistant P.aeruginosa has emerged as an important cause of infection in different hospitals worldwide. We aimed to determine frequencies of the four main resistance mechanisms [metallo-beta lactamase (MBL) production (blaIMP, blaVIM, blaSPM and blaNDM), overproduction of the MexAB-OprM and MexXY efflux pumps, overproduction of chromosome-encoded AmpC β-lactamase, and reduced OprD expression] in high-level carbapenem-resistant P...
October 9, 2017: Journal of the Chinese Medical Association: JCMA
https://www.readbyqxmd.com/read/29029072/detection-of-optra-in-the-african-continent-tunisia-within-a-mosaic-enterococcus-faecalis-plasmid-from-urban-wastewaters
#4
Ana R Freitas, Houyem Elghaieb, Ricardo León-Sampedro, Mohamed Salah Abbassi, Carla Novais, Teresa M Coque, Abdennaceur Hassen, Luisa Peixe
Objectives: Oxazolidinone resistance is a serious limitation in the treatment of MDR Enterococcus infections. Plasmid-mediated oxazolidinone resistance has been strongly linked to animals where the use of phenicols might co-select resistance to both antibiotic families. Our goal was to assess the diversity of genes conferring phenicol/oxazolidinone resistance among diverse enterococci and to characterize the optrA genetic environment. Methods: Chloramphenicol-resistant isolates (>16 mg/L, n = 245) from different sources (hospitals/healthy humans/wastewaters/animals) in Portugal, Angola and Tunisia (1996-2016) were selected...
September 26, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/29028223/are-scientific-research-outputs-aligned-with-national-policy-makers-priorities-a-case-study-of-tuberculosis-in-cambodia
#5
Lydia Boudarene, Richard James, Richard Coker, Mishal S Khan
With funding for tuberculosis (TB) research decreasing, and the high global disease burden persisting, there are calls for increased investment in TB research. However, justification of such investments is questionable, when translation of research outputs into policy and health care improvements remains a challenge for TB and other diseases. Using TB in Cambodia as a case study, we investigate how evidence needs of national policy makers are addressed by topics covered in research publications. We first conducted a systematic review to compile all studies on TB in Cambodia published since 2000...
October 1, 2017: Health Policy and Planning
https://www.readbyqxmd.com/read/29027495/monitoring-and-managing-antibiotic-resistance-in-refugee-children
#6
Helena C Maltezou, Dana Elhadad, Daniel Glikman
The past decade the Middle East and Southeastern Europe have witnessed an enormous movement of refugees due to the Syrian war and conflicts in Asia and Africa. Although carriage of and infections with multi-drug resistant (MDR) pathogens in refugees have been reported, pediatric data are scarce. Areas covered: MDR bacterial carriage and infections, and MDR-tuberculosis (TB) in refugee children from 2010. Expert commentary: High MDR carriage rates in refugee children are attributed to high pre-civil war MDR rates, war-damaged infrastructure and healthcare systems, and poor hygiene conditions...
October 13, 2017: Expert Review of Anti-infective Therapy
https://www.readbyqxmd.com/read/29027384/survey-for-correlation-between-biofilm-formation-and-virulence-determinants-in-a-collection-of-pathogenic-and-fecal-enterococcus-faecalis-isolates
#7
Fereshteh Saffari, Mohammad Sadegh Dalfardi, Shahla Mansouri, Roya Ahmadrajabi
BACKGROUND: Enterococcus faecalis is an opportunistic pathogen that causes most of the enterococcal infections. Among the different factors implicated in the pathogenesis of these organisms, biofilm formation and antibiotic resistance are the most important. The ability for biofilm formation has been attributed to the presence of some virulence genes. However, no definite correlation has been found. This study aimed to detect biofilm formation and antibiotic resistance patterns in E. faecalis isolates collected from clinical and fecal samples, and to investigate possible correlation between some virulence genes (esp, cyl, gelE) and biofilm formation...
September 2017: Infection & Chemotherapy
https://www.readbyqxmd.com/read/29025395/proposed-risk-factors-for-infection-with-multidrug-resistant-pathogens-in-hemodialysis-patients-hospitalized-with-pneumonia
#8
Jae-Uk Song, Hye Kyeong Park, Hyung Koo Kang, Jonghoo Lee
BACKGROUND: In patients with hemodialysis-associated pneumonia (HDAP), information on both microbiologic features and antimicrobial strategies is limited. The aim of this study is to investigate predictive factors of infection with multidrug-resistant (MDR) pathogens in HDAP patients. METHODS: This was a multicenter, retrospective, and observational study. Enrolled patients were classified into MDR or non-MDR pathogens groups according to culture results. We examined risk factors of infection with MDR pathogens and created a decision support tool using these risk factors...
October 12, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/29023413/diallylthiosulfinate-allicin-a-volatile-antimicrobial-from-garlic-allium-sativum-kills-human-lung-pathogenic-bacteria-including-mdr-strains-as-a-vapor
#9
Jana Reiter, Natalja Levina, Mark van der Linden, Martin Gruhlke, Christian Martin, Alan J Slusarenko
Garlic (Allium sativum) has potent antimicrobial activity due to allicin (diallylthiosulfinate) synthesized by enzyme catalysis in damaged garlic tissues. Allicin gives crushed garlic its characteristic odor and its volatility makes it potentially useful for combating lung infections. Allicin was synthesized (>98% pure) by oxidation of diallyl disulfide by H₂O₂ using formic acid as a catalyst and the growth inhibitory effect of allicin vapor and allicin in solution to clinical isolates of lung pathogenic bacteria from the genera Pseudomonas, Streptococcus, and Staphylococcus, including multi-drug resistant (MDR) strains, was demonstrated...
October 12, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29020364/antimicrobial-resistance-in-gram-negative-rods-causing-bacteremia-in-hematopoietic-stem-cell-transplant-patients-intercontinental-prospective-study-of-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 rods (GNR) resistance in hematopoietic stem cell transplantation (HSCT). Methods: GNR bacteremias occurring during six months post-HSCT (February/2014-May/2015) were prospectively collected, and analysed for rates and risk factors for resistance to fluoroquinolones, non-carbapenem anti-Pseudomonas beta-lactams (non-carbapenems), carbapenems and multidrug-resistance (MDR). Results: Sixty-five HSCT centers from 25 countries (Europe, Australia, Asia) reported data on 655 GNR episodes/704 pathogens in 591 patients (Enterobacteriaceae, 73%; non-fermentatives, 24% and 3% others)...
July 26, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29020166/long-term-impact-of-an-educational-antimicrobial-stewardship-program-on-hospital-acquired-candidemia-and-multidrug-resistant-bloodstream-infections-a-quasi-experimental-study-of-interrupted-time-series-analysis
#11
José Molina, Germán Peñalva, María V Gil-Navarro, Julia Praena, José A Lepe, María A Pérez-Moreno, Carmen Ferrándiz, Teresa Aldabó, Manuela Aguilar, Peter Olbrich, Manuel E Jiménez-Mejías, María L Gascón, Rosario Amaya-Villar, Olaf Neth, María J Rodríguez-Hernández, Antonio Gutiérrez-Pizarraya, José Garnacho-Montero, Cristina Montero, Josefina Cano, Julián Palomino, Raquel Valencia, Rocío Álvarez, Elisa Cordero, Marta Herrero, José M Cisneros
Background: The global crisis of bacterial resistance urges the scientific community to implement intervention programs in healthcare facilities to promote an appropriate use of antibiotics. However, the clinical benefits or the impact on resistance of these interventions has not been definitively proven. Methods: We designed a quasi-experimental intervention study with an interrupted time-series analysis. A multidisciplinary team conducted a multifaceted educational intervention in our tertiary-care hospital over a five-year period...
August 7, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29017263/progress-in-the-fight-against-multidrug-resistant-bacteria-2005-2016-modern-noninferiority-trial-designs-enable-antibiotic-development-in-advance-of-epidemic-bacterial-resistance
#12
John H Rex, George H Talbot, Mark J Goldberger, Barry I Eisenstein, Roger M Echols, John F Tomayko, Michael N Dudley, Aaron Dane
From a public health perspective, new antibacterial agents should be evaluated and approved for use before widespread resistance to existing agents emerges. However, for multidrug-resistant pathogens, demonstration of superior efficacy of a new agent over a current standard-of-care agent is routinely feasible only when epidemic spread of these dangerous organisms has already occurred. One solution to enable proactive drug development is to evaluate new antibiotics with improved in vitro activity against MDR pathogens using recently updated guidelines for active control, noninferiority trials of selected severe infections caused by more susceptible pathogens...
July 1, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29017262/ceftolozane-tazobactam-for-the-treatment-of-multidrug-resistant-pseudomonas-aeruginosa-infections-clinical-effectiveness-and-evolution-of-resistance
#13
Ghady Haidar, Nathan J Philips, Ryan K Shields, Daniel Snyder, Shaoji Cheng, Brian A Potoski, Yohei Doi, Binghua Hao, Ellen G Press, Vaughn S Cooper, Cornelius J Clancy, M Hong Nguyen
Background: Data on the use of ceftolozane-tazobactam and emergence of ceftolozane-tazobactam resistance during multidrug resistant (MDR)-Pseudomonas aeruginosa infections are limited. Methods: We performed a retrospective study of 21 patients treated with ceftolozane-tazobactam for MDR-P. aeruginosa infections. Whole genome sequencing and quantitative real-time polymerase chain reaction were performed on longitudinal isolates. Results: Median age was 58 years; 9 patients (43%) were transplant recipients...
July 1, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28994446/colonization-of-residents-and-staff-of-an-italian-long-term-care-facility-and-an-adjacent-acute-care-hospital-geriatric-unit-by-multidrug-resistant-bacteria
#14
Albert March, Richard Aschbacher, Ferisa Sleghel, Gertrud Soelva, Malgorzata Kaczor, Roberta Migliavacca, Aurora Piazza, Vittoria Mattioni Marchetti, Laura Pagani, Katia Scalzo, Valentina Pasquetto, Elisabetta Pagani
In 2016, we undertook a point prevalence screening study for Enterobacteriaceae with extended-spectrum β-lactamases (ESBLs), high-level AmpC cephalosporinases and carbapenemases, and also methicillin-resistant Staphylococcus aureus (MRSA) and vancomycin resistant enterococci (VRE) in a long-term care facility (LTCF) and the associated acute care hospital geriatric unit in Bolzano, Northern Italy. Urine samples and rectal, inguinal, oropharyngeal and nasal swabs were plated on selective agars. Demographic data were collected...
October 10, 2017: New Microbiologica
https://www.readbyqxmd.com/read/28991447/rigid-oxazole-acinetobactin-analog-blocks-siderophore-cycling-in-acinetobacter-baumannii
#15
Timothy Adam Wencewicz, Tabbetha Bohac, Justin Shapiro
The emergence of multi-drug resistant (MDR) Gram-negative bacterial pathogens has raised global concern. Non-traditional therapeutic strategies, including antivirulence approaches, are gaining traction as a means of applying less selective pressure for resistance in vivo. Here, we show that rigidifying the structure of the siderophore pre-acinetobactin from MDR Acinetobacter baumannii via oxidation of the phenolate-oxazoline moiety to a phenolate-oxazole results in a potent inhibitor of siderophore transport and imparts a bacteriostatic effect at low micromolar concentrations under infection-like conditions...
October 9, 2017: ACS Infectious Diseases
https://www.readbyqxmd.com/read/28991126/successful-treatment-of-invasive-conidiobolus-infection-during-therapy-for-acute-lymphoblastic-leukemia
#16
Craig Erker, Anna R Huppler, Thomas J Walsh, Michael E McCormick, Mariko Suchi, Neel S Bhatt, Susan C Kehl, Jessica Southwood, Paul Harker-Murray
Invasive fungal infections are a serious cause of morbidity and mortality in patients with hematologic malignancies. Conidiobolus species are molds within the order Entomophthorales and may disseminate to become rapidly fatal in immunocompromised individuals. This species of fungal infections are often multidrug resistant (MDR) and present unique therapeutic challenges. Reports of Conidiobolus infections are rare in pediatric oncology. We report the successful treatment of an adolescent male with B-cell lymphoblastic leukemia and MDR invasive sinopulmonary Conidiobolus infection with emphasis on early and aggressive neutrophil support with surgical debridement...
October 5, 2017: Journal of Pediatric Hematology/oncology
https://www.readbyqxmd.com/read/28986476/colistin-is-substrate-of-the-carnitine-organic-cation-transporter-2-octn2-slc22a5
#17
Michele Visentin, Zhibo Gai, Angelo Torozi, Christian Hiller, Gerd A Kullak-Ublick
Colistin is a polycation antibiotic used for the treatment of multidrug-resistance (MDR) gram-negative infections; nevertheless, its use is often limited by the high incidence of renal damage. The mechanism underlying colistin-induced nephrotoxicity is not known, but perhaps related to its accumulation in the renal cortex upon extensive reabsorption from the nascent urine. Because little is known about the membrane transport of colistin, the purpose of the present study was to characterize better the transport system involved in colistin renal handling by using HEK293 cells stably transfected with the main organic cation transporters expressed at the apical membrane of the proximal tubule...
October 6, 2017: Drug Metabolism and Disposition: the Biological Fate of Chemicals
https://www.readbyqxmd.com/read/28983513/potentiating-antibiotics-in-drug-resistant-clinical-isolates-via-stimuli-activated-superoxide-generation
#18
Colleen M Courtney, Samuel M Goodman, Toni A Nagy, Max Levy, Pallavi Bhusal, Nancy E Madinger, Corrella S Detweiler, Prashant Nagpal, Anushree Chatterjee
The rise of multidrug-resistant (MDR) bacteria is a growing concern to global health and is exacerbated by the lack of new antibiotics. To treat already pervasive MDR infections, new classes of antibiotics or antibiotic adjuvants are needed. Reactive oxygen species (ROS) have been shown to play a role during antibacterial action; however, it is not yet understood whether ROS contribute directly to or are an outcome of bacterial lethality caused by antibiotics. We show that a light-activated nanoparticle, designed to produce tunable flux of specific ROS, superoxide, potentiates the activity of antibiotics in clinical MDR isolates of Escherichia coli, Salmonella enterica, and Klebsiella pneumoniae...
October 2017: Science Advances
https://www.readbyqxmd.com/read/28980834/successful-treatment-of-three-severe-mdr-or-xdr-pseudomonas-aeruginosa-infections-with-ceftolozane-tazobactam
#19
Marc Xipell, Marta Bodro, Francesc Marco, José A Martínez, Alex Soriano
Ceftolozane/tazobactam is a novel fifth-generation cephalosporin β-lactamase combination with activity against extended-spectrum β-lactamases-producing enterobacteriaceae, and multidrug resistant Pseudomonas aeruginosa. However, clinical experience in real cases caused by these microorganisms is scarce. In this study, we describe three patients with severe infections caused by multidrug resistant and extensively drug-resistant (XDR) P. aeruginosa that were successfully treated with ceftolozane/tazobactam.
October 5, 2017: Future Microbiology
https://www.readbyqxmd.com/read/28980026/-bacterial-sepsis-diagnostics-and-calculated-antibiotic-therapy
#20
REVIEW
D C Richter, A Heininger, T Brenner, M Hochreiter, M Bernhard, J Briegel, S Dubler, B Grabein, A Hecker, W A Krüger, K Mayer, M W Pletz, D Störzinger, N Pinder, T Hoppe-Tichy, S Weiterer, S Zimmermann, A Brinkmann, M A Weigand, Christoph Lichtenstern
The mortality of patients with sepsis and septic shock is still unacceptably high. An effective antibiotic treatment within 1 h of recognition of sepsis is an important target of sepsis treatment. Delays lead to an increase in mortality; therefore, structured treatment concepts form a rational foundation, taking relevant diagnostic and treatment steps into consideration. In addition to the assumed focus and individual risks of each patient, local resistance patterns and specific problem pathogens must be taken into account for selection of anti-infection treatment...
October 4, 2017: Der Anaesthesist
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