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linezolid resistance

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https://www.readbyqxmd.com/read/28333257/comparative-effectiveness-of-linezolid-versus-vancomycin-as-definitive-antibiotic-therapy-for-heterogeneously-resistant-vancomycin-intermediate-coagulase-negative-staphylococcal-central-line-associated-bloodstream-infections-in-a-neonatal-intensive-care-unit
#1
A C Blanchard, E Fortin, C Laferrière, I Goyer, A Moussa, J Autmizguine, C Quach
Objectives: Heterogeneously resistant vancomycin-intermediate coagulase-negative staphylococci (hVICoNS) are emerging pathogens causing central-line-associated bloodstream infections (CLABSIs) in neonatal intensive care unit (NICU) patients. Given the burden of disease associated with CLABSI and the current lack of therapeutic guidelines, we aimed to compare the effectiveness of linezolid versus vancomycin used as the definitive antibiotic therapy for hVICoNS CLABSI. Methods: We performed a retrospective cohort study of infants with hVICoNS CLABSI from a single NICU between 2009 and 2014, treated with either linezolid or vancomycin as definitive antibiotic therapy...
March 3, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28333192/susceptibilities-of-mdr-mycobacterium-tuberculosis-isolates-to-unconventional-drugs-compared-with-their-reported-pharmacokinetic-pharmacodynamic-parameters
#2
Joseph S Cavanaugh, Ruwen Jou, Mei-Hua Wu, Tracy Dalton, Ekaterina Kurbatova, Julia Ershova, J Peter Cegielski
Background: The second-line drugs recommended to treat drug-resistant TB are toxic, expensive and difficult to procure. Given increasing resistance, the need for additional anti-TB drugs has become more urgent. But new drugs take time to develop and are expensive. Some commercially available drugs have reported anti-mycobacterial activity but are not routinely used because supporting laboratory and clinical evidence is sparse. Methods: We analysed 217 MDR M. tuberculosis isolates including 153 initial isolates from unique patients and 64 isolates from follow-up specimens during the course of treatment...
February 20, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28332345/high-incidence-of-virulence-factors-among-clinical-enterococcus-faecalis-isolates-in-southwestern-iran
#3
Hamid Heidari, Somayeh Hasanpour, Hadi Sedigh Ebrahim-Saraie, Mohammad Motamedifar
BACKGROUND: Over the past two decades, enterococci have emerged as an important agent responsible for hospital acquired infection. Several virulence factors contribute to the adherence, colonization, evasion of the host immune response, and pathogenicity and severity of the infection. Enterococcus faecalis is the most common and virulent species causing infections in hospitalized patients. The aim of the present study was to examine the prevalence of genes encoding virulence factors and antimicrobial resistance patterns of E...
March 13, 2017: Infection & Chemotherapy
https://www.readbyqxmd.com/read/28330892/in-vitro-susceptibility-testing-of-tedizolid-against-nontuberculous-mycobacteria
#4
Barbara A Brown-Elliott, Richard J Wallace
Tedizolid is a new oxazolidinone with improved in vitro and intracellular potency against Mycobacterium tuberculosis, including multidrug resistant strains, and some species of nontuberculous mycobacteria (NTM) compared with linezolid.Using the current Clinical and Laboratory Standards Institute (CLSI) recommended method of broth microdilution, susceptibility testing of 170 isolates of rapidly growing mycobacteria showed equivalent or lower (1- to 8-fold MIC50 and/or MIC90 values) for tedizolid compared to linezolid...
March 22, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28330484/antibiotic-resistance-and-biofilm-production-among-the-strains-of-staphylococcus-aureus-isolated-from-pus-wound-swab-samples-in-a-tertiary-care-hospital-in-nepal
#5
Ankit Belbase, Narayan Dutt Pant, Krishus Nepal, Bibhusan Neupane, Rikesh Baidhya, Reena Baidya, Binod Lekhak
BACKGROUND: The increasing drug resistance along with inducible clindamycin resistance, methicillin resistance and biofilm production among the strains of Staphylococcus aureus are present as the serious problems to the successful treatment of the infections caused by S. aureus. So, the main objectives of this study were to determine the antimicrobial susceptibility patterns along with the rates of inducible clindamycin resistance, methicillin resistance and biofilm production among the strains of S...
March 23, 2017: Annals of Clinical Microbiology and Antimicrobials
https://www.readbyqxmd.com/read/28326447/in-vitro-activity-of-tedizolid-and-linezolid-against-staphylococcus-epidermidis-isolated-from-prosthetic-joint-infections
#6
C Littorin, B Hellmark, Å Nilsdotter-Augustinsson, B Söderquist
Prosthetic joint infections (PJIs) are rare but long-lasting and are serious complications without any spontaneous resolution, requiring additional surgery and long-term treatment with antibiotics. Staphylococci are the most important aetiological agents of PJIs, and among the coagulase-negative staphylococci Staphylococcus epidermidis is the most common. However, S. epidermidis often displays multidrug resistance (MDR), demanding additional treatment options. The objective was to examine the effectiveness of tedizolid and linezolid against S...
March 22, 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/28321212/microbiological-characteristics-and-clinical-features-of-cardiac-implantable-electronic-device-infections-at-a-tertiary-hospital-in-china
#7
Ruobing Wang, Xuebin Li, Qi Wang, Yawei Zhang, Hui Wang
The incidence of cardiac implantable electronic device (CIED) infections is rapidly increasing worldwide. However, the microbiological characteristics and clinical features of symptomatic CIED infections are not well described. The present study included patients with CIED infections in China, and their pocket tissues were collected for clinical microbiological determination. A total of 219 patients with CIED infections were investigated; of these patients, 145 (66.2%) were positive for CIED infection in pocket tissue cultures and 24 (11...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28317803/an-unusual-antibiotic-susceptibility-pattern-in-a-mycobacterium-cosmeticum-strain-isolated-from-the-chesapeake-bay
#8
Vajini Atukorale, Nicholas Boire, Kim Dionne, Stefan Riedel, Nicole Parrish
OBJECTIVE/BACKGROUND: Mycobacterium cosmeticum, first described in 2004, was recovered from a patient undergoing a cosmetic procedure. Subsequently, this species was associated with an outbreak in a nail salon. In all cases, the isolates were susceptible to all antibiotics tested. Recently, however, we recovered a strain of M. cosmeticum from the Chesapeake Bay, resistant to 11 of 14 antimicrobials. The objective of this work was to present our findings on the resistance and susceptibility of this isolate to various antibiotics...
January 2017: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28314920/-new-antibiotics-standstill-or-progress
#9
J Rademacher, T Welte
The development of resistance to antibiotics has been ignored for a long time. But nowadays, increasing resistance is an important topic. For a decade no new antibiotics had been developed and it is not possible to quickly close this gap of new resistance and no new drugs. This work presents six new antibiotics (ceftaroline, ceftobiprole, solithromycin, tedizolid, ceftolozane/tazobactam, ceftazidime/avibactam). In part, only expert opinions are given due to lack of study results.The two 5th generation cephalosporins ceftaroline and ceftobiprole have beside their equivalent efficacy to ceftriaxone (ceftaroline) and cefipim (ceftobiprole) high activity against MRSA...
March 17, 2017: Medizinische Klinik, Intensivmedizin und Notfallmedizin
https://www.readbyqxmd.com/read/28303819/prevalence-and-genetic-mechanisms-of-antimicrobial-resistance-in-staphylococcus-species-a-multicentre-report-of-the-indian-council-of-medical-research-antimicrobial-resistance-surveillance-network
#10
Sunanda Rajkumar, Sujatha Sistla, Meerabai Manoharan, Madhan Sugumar, Niveditha Nagasundaram, Subhash Chandra Parija, Pallab Ray, Yamuna Devi Bakthavatchalam, Balaji Veeraraghavan, Arti Kapil, Kamini Walia, V C Ohri
PURPOSE: Routine surveillance of antimicrobial resistance (AMR) is an essential component of measures aimed to tackle the growing threat of resistant microbes in public health. This study presents a 1-year multicentre report on AMR in Staphylococcus species as part of Indian Council of Medical Research-AMR surveillance network. MATERIALS AND METHODS: Staphylococcus species was routinely collected in the nodal and regional centres of the network and antimicrobial susceptibility testing was performed against a panel of antimicrobials...
January 2017: Indian Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28296768/difficult-clinical-management-of-antituberculosis-dress-syndrome-complicated-by-mrsa-infection-a-case-report
#11
Li Wang, Lin-Feng Li
RATIONALE: Drug reaction with eosinophilia and systemic symptoms (DRESS) syndrome is a severe drug-induced hypersensitivity reaction characterized by skin rash, fever, blood abnormalities, and multiple organ involvement. The diagnosis of DRESS syndrome is often delayed because of its variable presentation. Prompt withdrawal of the culprit drug is the definitive treatment. DRESS syndrome induced by antituberculosis drugs has rarely been reported. PATIENT CONCERNS: A 50-year-old man admitted to our hospital with recurrent episodes of progressive rash, fever, eosinophilia, lymphadenopathy, hepatic, and pulmonary involvement were experienced after repeat trials of the same antituberculosis drugs...
March 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28293153/susceptibility-profile-of-methicillin-resistant-staphylococcus-aureus-to-linezolid-in-clinical-isolates
#12
Ali Shariq, Syed Bilal Tanvir, Atif Zaman, Salman Khan, Armeena Anis, Misha Aftab Khan, Sumaira Ahmed
OBJECTIVE: To determine the resistance and sensitivity pattern of methicillin-resistant Staphylococcus aureus (MRSA) isolates to linezolid (LZD) along with its prevalence in a tertiary care hospital of Karachi, Pakistan. MATERIALS AND METHODS: A cross-sectional study was carried out. This study lasted for about 1 year. Prevalence and sensitivity of LZD, vancomycin, and oxacillin was tested against isolates of MRSA. RESULTS: Out of total 369 specimens 165 were found to be MRSA making the prevalence in our study 44...
January 2017: International Journal of Health Sciences
https://www.readbyqxmd.com/read/28284617/detection-of-novel-oxazolidinone-and-phenicol-resistance-gene-optra-in-enterococcal-isolates-from-food-animals-and-animal-carcasses
#13
Migma Dorji Tamang, Dong Chan Moon, Su-Ran Kim, Hee Young Kang, Kichan Lee, Hyang-Mi Nam, Geum-Chan Jang, Hee-Soo Lee, Suk-Chan Jung, Suk-Kyung Lim
Altogether 7720 Enterococcus faecalis and 3939 E. faecium isolated from food animals and animal carcasses during 2003-2014 in Korea were investigated to determine if linezolid-resistant (LR) enterococci (≥8μg/ml) are present. Overall, 12 E. faecalis and 27 E. faecium recovered from chickens (n=32), pigs (n=6), and cattle (n=1) were resistant to linezolid and were further characterized using molecular methods Most LR isolates were also resistant to chloramphenicol (97.44%) and florfenicol (92.31%). Molecular analysis showed no mutations in the 23S ribosomal RNA and in the ribosomal protein L3...
March 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28284608/characterization-of-pig-associated-methicillin-resistant-staphylococcus-aureus
#14
Jun Li, Nansong Jiang, Yuebin Ke, Andrea T Feßler, Yang Wang, Stefan Schwarz, Congming Wu
Livestock-associated methicillin-resistant Staphylococcus aureus (LA-MRSA) have been reported in various countries worldwide. However, although China is one of the biggest pig and pork producers, large-scale studies on pig-associated LA-MRSA from China are scarce. The aims of this study were to analyze 2420 non-duplicate samples collected from pigs at swine farms and slaughterhouses in different regions in China during 2014 for the prevalence of pig-associated MRSA and to determine the antimicrobial resistance pheno- and genotypes of the respective isolates...
March 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28273820/in-vitro-activities-of-lcb-01-0648-a-novel-oxazolidinone-against-gram-positive-bacteria
#15
Sang-Hun Oh, Josep Kim, Sung-Yoon Baek, Sang-Eun Chae, Hee-Soo Park, Young-Lag Cho, Jin-Hwan Kwak
Oxazolidinones are a novel class of synthetic antibacterial agents that inhibit bacterial protein synthesis. Here, we synthesized and tested a series of oxazolidinone compounds containing cyclic amidrazone. Among these compounds, we further investigated the antibacterial activities of LCB01-0648 against drug-susceptible or resistant Gram-positive cocci in comparison with those of six reference compounds. LCB01-0648 showed the most potent antimicrobial activities against clinically isolated Gram-positive bacteria...
March 3, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28273381/role-of-combination-antimicrobial-therapy-for-vancomycin-resistant-enterococcus-faecium-infections-review-of-the-current-evidence
#16
Juwon Yim, Jordan R Smith, Michael J Rybak
Enterococcus species are the second most common cause of nosocomial infections in the United States and are particularly concerning in critically ill patients with preexisting comorbid conditions. Rising resistance to antimicrobials that were historically used as front-line agents for treatment of enterococcal infections, such as ampicillin, vancomycin, and aminoglycosides, further complicates the treatment of these infections. Of particular concern are Enterococcus faecium strains that are associated with the highest rate of vancomycin resistance...
March 8, 2017: Pharmacotherapy
https://www.readbyqxmd.com/read/28270207/cost-effectiveness-of-adding-novel-or-group-5-interventions-to-a-background-regimen-for-the-treatment-of-multidrug-resistant-tuberculosis-in-germany
#17
Daniel Wirth, Ramesh Dass, Robert Hettle
BACKGROUND: Treatment of multidrug-resistant tuberculosis (MDR-TB) is complex, lengthy, and involves a minimum of four drugs termed a background regimen (BR), that have not previously been prescribed or that have proven susceptible to patient sputum culture isolates. In recent years, promising new treatment options have emerged as add-on therapies to a BR. The aim of this study was to evaluate the long-term costs and effectiveness of adding the novel or group 5 interventions bedaquiline, delamanid, and linezolid to a background regimen (BR) of drugs for the treatment of adult patients with pulmonary multidrug-resistant tuberculosis (MDR-TB), within their marketing authorisations, from a German healthcare cost-effectiveness perspective...
March 8, 2017: BMC Health Services Research
https://www.readbyqxmd.com/read/28267763/molecular-characterization-of-vancomycin-resistant-enterococcus-faecium-isolates-from-bermuda
#18
Patrick Eberechi Akpaka, Shivnarine Kissoon, Clyde Wilson, Padman Jayaratne, Ashley Smith, George R Golding
Molecular characteristics of vancomycin resistant enterococci isolates from Bermuda Island is currently unknown. This study was conducted to investigate phenotypic and genotypic characteristics of VRE isolates from Bermuda Island using the chromogenic agar, E-tests, polymerase chain reaction (PCR), pulsed-field gel electrophoresis (PFGE) and multilocus sequence typing (MLST). Eighteen E. faecium isolates were completely analyzed and were all resistant to vancomycin, susceptible to linezolid and quinupristin/dalfopristin, positive for vanA and esp genes...
2017: PloS One
https://www.readbyqxmd.com/read/28264856/effect-of-continuous-and-sequential-therapy-among-veterans-receiving-daptomycin-or-linezolid-for-vancomycin-resistant-enterococcus-faecium-bacteremia
#19
Nicholas S Britt, Emily M Potter, Nimish Patel, Molly E Steed
Vancomycin-resistant Enterococcus faecium bloodstream infections (VREF-BSI) cause significant mortality, highlighting the need to optimize treatment. We compared the effectiveness and safety of daptomycin (DAP) and linezolid (LZD) as continuous or sequential therapy for VREF-BSI in a national, retrospective, propensity score (PS) matched cohort study of hospitalized Veterans Affairs patients (2004-2014). We compared clinical outcomes and adverse events among patients treated with continuous LZD, continuous DAP, or sequential LZD followed by DAP (LZD-DAP)...
March 6, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28264610/corynebacterium-species-causing-breast-abscesses-among-patients-attending-a-tertiary-care-hospital-in-chennai-south-india
#20
Indira Poojary, Ann Kurian, Jayalekshmi V A, Debora Devapriya J, Thirunarayan M A
BACKGROUND: Corynebacterium species other than Corynebacterium diphtheriae were mostly considered contaminants in the past, but there are reports of their association with wide variety of human infections lately. In this study, we look into Corynebacterium species isolated from breast abscess patients and assess their antimicrobial susceptibility pattern and treatment outcomes. MATERIAL AND METHODS: Pus samples from suspected breast abscess cases were examined from October 2014 to September 2015...
March 6, 2017: Infectious Diseases
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