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https://www.readbyqxmd.com/read/29228133/regional-epidemiology-of-methicillin-resistant-staphylococcus-aureus-among-adult-intensive-care-unit-patients-following-state-mandated-active-surveillance
#1
Michael Y Lin, Mary K Hayden, Rosie D Lyles, Karen Lolans, Louis F Fogg, Alexander J Kallen, Stephen G Weber, Robert A Weinstein, William E Trick
Background: In 2007, Illinois became the first state in the United States to mandate active surveillance of methicillin-resistant Staphylococcus aureus (MRSA). The Illinois law applies to intensive care unit (ICU) patients; contact precautions are required for patients found to be MRSA-colonized. However, the effectiveness of a legislated "search and isolate" approach to reduce MRSA burden among critically ill patients is uncertain. We evaluated whether the prevalence of MRSA colonization declined in the 5 years after the start of mandatory active surveillance...
December 7, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29228127/antibiotic-resistance-and-the-risk-of-recurrent-bacteremia
#2
Sjoukje H S Woudt, Sabine C de Greeff, Annelot F Schoffelen, Anne L M Vlek, Marc J M Bonten
Background: Direct health effects of antibiotic resistance are difficult to assess. We quantified the risk of recurrent bacteremia associated with antibiotic resistance. Methods: We extracted antimicrobial susceptibility testing data on blood isolates of Enterobacteriaceae, Pseudomonas spp., Enterococcus spp. and Staphylococcus aureus from the Dutch surveillance system for antimicrobial resistance between 2008 and 2017. First and first recurrent (4-30days) bacteremia episodes were categorized as susceptible, single non-susceptible or co-non-susceptible (I/R), to 3rd generation cephalosporins -/+ carbapenems (Enterobacteriaceae), ceftazidime -/+ carbapenems (Pseudomonas spp...
December 7, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29228010/nasal-carriage-of-methicillin-resistant-staphylococcus-aureus-mrsa-at-a-palliative-care-unit-a-prospective-single-service-analysis
#3
Maria Heckel, Walter Geißdörfer, Franziska A Herbst, Stephanie Stiel, Christoph Ostgathe, Christian Bogdan
BACKGROUND: The emergence of multidrug-resistant bacterial microorganisms is a particular challenge for the health care systems. Little is known about the occurrence of methicillin-resistant Staphylococcus aureus (MRSA) and multidrug-resistant Gram-negative bacteria (MDRGNB) in patients of palliative care units (PCU). AIM: The primary aim of this study was to determine the carriage of MRSA among patients of a PCU at a German University Hospital and to assess whether the positive cases would have been detected by a risk-factor-based screening-approach...
2017: PloS One
https://www.readbyqxmd.com/read/29227933/synthesis-biological-evaluation-and-metabolic-stability-of-phenazine-derivatives-as-antibacterial-agents
#4
Maddeboina Krishnaiah, Nathalia Rodrigues de Almeida, Venkatareddy Udumula, Zhongcheng Song, Yashpal Singh Chhonker, Mai M Abdelmoaty, Valter Aragao do Nascimento, Daryl J Murry, Martin Conda-Sheridan
Drug-resistant pathogens are a major cause of hospital- and community-associated bacterial infections in the United States and around the world. These infections are increasingly difficult to treat due to the development of antibiotic resistance and the formation of bacterial biofilms. In the paper, a series of phenazines were synthesized and evaluated for their in vitro antimicrobial activity against Gram positive (methicillin resistant staphylococcus aureus, MRSA) and Gram negative (Escherichia coli, E. coli) bacteria...
November 9, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29227931/synthesis-and-antibacterial-evaluation-of-novel-cationic-chalcone-derivatives-possessing-broad-spectrum-antibacterial-activity
#5
Wen-Chao Chu, Peng-Yan Bai, Zhao-Qing Yang, De-Yun Cui, Yong-Gang Hua, Yi Yang, Qian-Qian Yang, En Zhang, Shangshang Qin
There is an urgent need to identify new antibiotics with novel mechanisms that combat antibiotic resistant bacteria. Herein, a series of chalcone derivatives that mimic the essential properties of cationic antimicrobial peptides were designed and synthesized. Antibacterial activities against drug-sensitive bacteria, including Staphylococcus aureus, Enterococcus faecalis, Escherichia coli and Salmonella enterica, as well as clinical multiple drug resistant isolates of methicillin-resistant S. aureus (MRSA), KPC-2-producing and NDM-1-producing Carbapenem-resistant Enterobacteriaceae were evaluated...
December 5, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29227620/nano-ag-zno-incorporated-hydroxyapatite-composite-coatings-highly-effective-infection-prevention-and-excellent-osteointegration
#6
Yanzhe Zhang, Xiangmei Liu, Zhaoyang Li, Shengli Zhu, Xu-Bo Yuan, Zhenduo Cui, Xianjin Yang, Paul K Chu, Shuilin Wu
The interfacial characterisics play an important role in infection prevention and osteointegration of artificial bone implants. In this work, both Ag and ZnO nanoparticles are incorporated into hydroxyapatite (HA) nano powders and deposited onto Ti6Al4V (Ti6) implants by laser cladding. The composite coatings possess a hierarchical surface structure with homogeneous distributions of Ag and ZnO. The Ag and ZnO nanoprticles are immobilized by laser cladding ensure long-term and gradual release of Ag and Zn ions at low cumulative concentrations of 36...
December 11, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29227579/obesity-type-2-diabetes-increases-inflammation-periosteal-reactive-bone-formation-and-osteolysis-during-staphylococcus-aureus-implant-associated-bone-infection
#7
Christopher W Farnsworth, Eric M Schott, Abigail M Benvie, Jacob Zukoski, Stephen L Kates, Edward M Schwarz, Steven R Gill, Michael J Zuscik, Robert A Mooney
Obese and type 2 diabetic (T2D) patients have a 5-fold increased rate of infection following placement of an indwelling orthopaedic device. Though implant infections are associated with inflammation, periosteal reactive bone formation and osteolysis, the effect of obesity/T2D on these complicating factors has not been studied. To address this question, C57BL/6J mice were fed a high fat diet (60% Kcal from fat) to induce obesity/T2D, or a control diet (10% Kcal from fat) for three months, and challenged with a transtibial pin coated with a bioluminescent USA300 strain of S...
December 11, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29226254/empirical-treatment-of-bacterial-keratitis-an-international-survey-of-corneal-specialists
#8
Ariana Austin, Julie Schallhorn, Mike Geske, Mark Mannis, Tom Lietman, Jennifer Rose-Nussbaumer
Background/aims: New antibiotic agents and changing susceptibility patterns may have changed the empirical treatment of bacterial keratitis. Our objective in this study was to survey cornea specialists' practice patterns in the initial treatment of bacterial ulcers. Methods: This study consisted of a short online survey emailed to members of the Cornea Society listserv for an international sample of cornea specialists. Data collection began July 2014 and ended October 2014...
August 2017: BMJ Open Ophthalmology
https://www.readbyqxmd.com/read/29225755/evaluation-of-anti-bacterial-effects-of-nickel-nanoparticles-on-biofilm-production-by-staphylococcus-epidermidis
#9
Morteza Vahedi, Nima Hosseini-Jazani, Saber Yousefi, Maryam Ghahremani
Background and Objectives: Staphylococcus epidermidis produces biofilm by extracellular polysaccharides, causing bacterial adherence to different surfaces. Anti-microbial effects of nickel nanoparticles on some bacterial strains such as S. aureus and Escherichia coli have been determined in limited studies. The aim of the present study is to examine the inhibitory effect of nickel nanoparticles on biofilm formation using clinical isolates of S. epidermidis and its hemolytic effect on human red blood cells...
June 2017: Iranian Journal of Microbiology
https://www.readbyqxmd.com/read/29225754/methicillin-resistance-and-selective-genetic-determinants-of-staphylococcus-aureus-isolates-with-bovine-mastitis-milk-origin
#10
Zohreh Ahangari, Masoud Ghorbanpoor, Masoud Reza Seifiabad Shapouri, Darioush Gharibi, Kiarash Ghazvini
Background and Objectives: Staphylococcus aureus is one of the major causes of bovine mastitis, which can be transmitted from animals to humans. Methicillin-resistant S. aureus (MRSA) isolates are more attentive and if not treated promptly, they can cause death. The aim of this study was to determine the prevalence of methicillin resistance and frequency of selected virulence factors of S. aureus isolates with bovine mastitis milk origin in Ahvaz, southwest of Iran. Materials and Methods: During a two-year period (2014-2015), 75 S...
June 2017: Iranian Journal of Microbiology
https://www.readbyqxmd.com/read/29225753/study-of-bacterial-flora-associated-with-mobile-phones-of-healthcare-workers-and-non-healthcare-workers
#11
Raghavendra Rao Morubagal, Sowmya Govindanahalli Shivappa, Rashmi Padmanabha Mahale, Sumana Mhadevaiah Neelambike
Background and Objectives: Despite improvements in modern diagnosis and therapies, hospital acquired infections remain a leading problem of global health systems. Healthcare workers mobile phones is a reservoir for potential pathogens. Despite the high possibility of being contaminated, mobile phones are rarely clean and are often touched during or after examination of patients and handling of specimens without proper hand washing. The main objective of the present study was to isolate, identify different types of bacteria and their antibiotic sensitivity from mobile phones of healthcare workers and non-health-care workers...
June 2017: Iranian Journal of Microbiology
https://www.readbyqxmd.com/read/29225626/hemothorax-due-to-ruptured-mycotic-aneurysm-of-intercostal-arteries-associated-with-infective-endocarditis
#12
Eddie Y Liu, Jennifer Crawford, Haissam Haddad
We present a case of hemothorax due to ruptured mycotic aneurysm in three intercostal arteries in a 40-year-old male with methicillin-resistant Staphylococcus aureus infective endocarditis (IE) due to intravenous drug use. Microcoil embolization and thoracotomy successfully achieved hemostasis. Mycotic aneurysm is a rare complication of IE and is usually found in the intracranial vessels. Ruptured mycotic aneurysm in the intercostal arteries can be associated with IE and can present as acute hemothorax.
2017: Case Reports in Medicine
https://www.readbyqxmd.com/read/29225254/observational-study-of-infective-endocarditis-at-a-community-based-hospital-dominance-of-elderly-patients-with-comorbidity
#13
Tomoo Nagai, Yoshiyuki Takase, Akira Hamabe, Hirotsugu Tabata
Objective The purpose of this study was to present the recent clinical profiles and the real-world management of infective endocarditis (IE). Methods All medical records of patients with IE were reviewed retrospectively for their clinical data, including clinical presentation, laboratory results, blood cultures, echocardiographic findings, treatments and complications. Using the clinical data collected, we calculated the EuroSCORE II, the European risk score for adult cardiac surgery, the Charlson Comorbidity Index as a surrogate of comordibity, and the Katz Index as a surrogate of frailty...
December 8, 2017: Internal Medicine
https://www.readbyqxmd.com/read/29225037/understanding-and-sensitizing-density-dependent-persistence-to-quinolone-antibiotics
#14
Arnaud Gutierrez, Saloni Jain, Prerna Bhargava, Meagan Hamblin, Michael A Lobritz, James J Collins
Physiologic and environmental factors can modulate antibiotic activity and thus pose a significant challenge to antibiotic treatment. The quinolone class of antibiotics, which targets bacterial topoisomerases, fails to kill bacteria that have grown to high density; however, the mechanistic basis for this persistence is unclear. Here, we show that exhaustion of the metabolic inputs that couple carbon catabolism to oxidative phosphorylation is a primary cause of growth phase-dependent persistence to quinolone antibiotics...
December 5, 2017: Molecular Cell
https://www.readbyqxmd.com/read/29224997/in-vitro-assessment-of-the-anti-biofilm-activity-of-ethanol-alone-and-in-combination-with-enoxaparin-60iu
#15
María Jesús Pérez-Granda, Beatriz Alonso, Ana Rodríguez-Huerta, Carmen Rodríguez, María Guembe
INTRODUCTION: Catheter-related bloodstream infection (C-RBSI) can sometimes be managed without catheter removal by combining systemic therapy with catheter lock therapy. Most antiseptic lock solutions are made up of ethanol combined with an anticoagulant. However, data regarding the anti-biofilm activity of ethanol combined with enoxaparin are scarce. We aimed to assess the efficacy of ethanol at different concentrations combined with enoxaparin 60IU as a lock solution for eradication of the biofilm of different microorganisms...
December 7, 2017: Enfermedades Infecciosas y Microbiología Clínica
https://www.readbyqxmd.com/read/29224881/early-lactation-extended-pirlimycin-therapy-against-naturally-acquired-staphylococcus-aureus-intramammary-infections-in-heifers-a-randomized-controlled-trial
#16
S Skoulikas, S Dufour, D Haine, J-Y Perreault, J-P Roy
The primary objective of the current study was to evaluate cure rate following an early-lactation extended intramammary pirlimycin treatment on heifers naturally infected by Staphylococcus aureus. The secondary objective was to assess Petrifilm Staph Express (3M Microbiology, St. Paul, MN) count plate characteristics when used in a protocol for early-lactation detection of infected quarters in heifers. Milk samples were collected from heifers (n = 946) in the first few days following calving (mean = 5 d). Heifers with laboratory-confirmed S...
December 7, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/29224767/lugol-s-solution-eradicates-staphylococcus-aureus-biofilm-in%C3%A2-vitro
#17
Torstein Grønseth, Lene K Vestby, Live L Nesse, Even Thoen, Olivier Habimana, Magnus von Unge, Juha T Silvola
OBJECTIVES: The aim of the study was to evaluate the antibacterial efficacy of Lugol's solution, acetic acid, and boric acid against Staphylococcus aureus biofilm. METHODS: The efficacy of Lugol's solution 1%, 0.1%, and 0.05%, acetic acid 5% or boric acid 4.7% for treatment of Staphylococcus aureus biofilm in vitro was tested using 30 clinical strains. Susceptibility in the planktonic state was assessed by disk diffusion test. Antiseptic effect on bacteria in biofilm was evaluated by using a Biofilm-oriented antiseptic test (BOAT) based on metabolic activity, a biofilm bactericidal test based on culturing of surviving bacteria and confocal laser scanning microscopy combined with LIVE/DEAD staining...
December 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/29224318/-distribution-and-drug-resistance-of-pathogens-of-blood-stream-infection-in-patients-with-hematological-malignancies-after-chemotherapy
#18
S Z Chen, K N Lin, M Xiao, X F Luo, Q Li, J H Ren, R Y Huang, M M Chen, Z Z Ally, T Chen, J D Yang, Jianda Hu
Objective: To investigate the distribution and resistance of pathogens isolated from blood cultures in patients with hematological malignancies after chemotherapy in Union Hospital of Fujian Medical University so as to understand the real situation of blood stream infection (BSI) and provide the basis for rational use of antibiotics in clinic. Methods: The data of 657 strains isolated from blood culture specimens of patients with hematological malignancies from January 2013 to December 2016 were collected analyzed...
November 14, 2017: Zhonghua Xue Ye Xue za Zhi, Zhonghua Xueyexue Zazhi
https://www.readbyqxmd.com/read/29224317/-a-multicenter-retrospective-study-of-pathogenic-bacteria-distribution-and-drug-resistance-in-febrile-neutropenic-patients-with-hematological-diseases-in-shanghai
#19
J Zhu, J Hu, Y F Mao, F Y Chen, J Y Zhu, J M Shi, D D Yu, S G Hao, R Tao, P Liu, S Y Gu, J Hou, H Y He, A B Liang, Y Ding, L G Liu, Y H Xie, Q Zhu, Y H Yu, Y H Yao, W Chen, H L Xu, X H Han, C Wang
Objective: To investigate the pathogen spectrum distribution and drug resistance of febrile neutropenic patients with hematological diseases in Shanghai. Methods: A retrospective study was conducted on the clinical isolates from the febrile neutropenic patients hospitalized in the departments of hematology in 12 general hospitals in Shanghai from January 2012 to December 2014. The drug susceptibility test was carried out by Kirby-Bauer method. WHONET 5.6 software was used to analyze pathogenic bacteria and drug susceptibility data...
November 14, 2017: Zhonghua Xue Ye Xue za Zhi, Zhonghua Xueyexue Zazhi
https://www.readbyqxmd.com/read/29224313/-incidence-of-blood-stream-infections-of-1265-patients-with-hematopoietic-stem-cell-transplantation-and-analysis-of-pathogenic-bacteria
#20
Q Z Han, Y Chen, H Yang, X F Zhang, J Chen, D P Wu, S N Chen, H Y Qiu
Objective: To analyze the incidence and microbiological features of blood stream infections (BSI) of patients with hematopoietic stem cell transplantation (HSCT) and to provide laboratory data for empirical use of antibiotic for the HSCT patients with BSI. Methods: The incidence of bloodstream infection, the positive rate of blood culture, bacterial spectrum and drug resistance were analyzed in 1 265 HSCT recipients during 2013 and 2015 were retrospectively studied. Results: Of 1265 patients undergoing HSCT, 1 422 cases of suspected BSI occurred in 784 patients (61...
November 14, 2017: Zhonghua Xue Ye Xue za Zhi, Zhonghua Xueyexue Zazhi
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