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https://www.readbyqxmd.com/read/28630196/antimicrobial-susceptibility-trends-among-staphylococcus-aureus-from-united-states-hospitals-results-from-7-years-of-the-ceftaroline-aware-surveillance-program-2010-2016
#1
Helio S Sader, Rodrigo E Mendes, Jennifer M Streit, Robert K Flamm
We evaluated trends in Staphylococcus aureus antimicrobial susceptibility in United States hospitals in the 2010-2016 period. A total of 21,056 clinical isolates from 42 medical centers were tested for susceptibility by broth microdilution methods. MRSA rates decreased from 50.0% (2010) to 42.2% (2016). Susceptibility to erythromycin, levofloxacin, and clindamycin increased slightly, whereas susceptibility to ceftaroline, trimethoprim-sulfamethoxazole, and tetracycline remained stable. Ceftaroline retained potent activity against MSSA and MRSA (97...
June 19, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28630189/in-vitro-activity-of-delafloxacin-and-microbiological-response-against-fluoroquinolone-susceptible-and-non-susceptible-s-aureus-isolates-from-two-phase-3-studies-of-acute-bacterial-skin-and-skin-structure-infections-absssi
#2
S McCurdy, L Lawrence, M Quintas, L Woosley, R Flamm, C Tseng, S Cammarata
Delafloxacin is an investigational anionic fluoroquinolone antibiotic with broad spectrum in vitro activity, including Gram-positive organisms, Gram-negative organisms, atypical organisms, and anaerobes. The in vitro activity of delafloxacin and percent microbiological response in subjects infected with fluoroquinolone susceptible and non-susceptible S. aureus isolates was determined from two global Phase 3 studies of delafloxacin versus vancomycin plus aztreonam in ABSSSI. Patients were enrolled in 23 countries predominately in the US but also Eastern Europe, South America and Asia...
June 19, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28629333/efficacy-of-ultra-short-course-chemotherapy-for-new-smear-positive-drug-susceptible-pulmonary-tuberculosis-study-protocol-of-a-multicenter-randomized-controlled-clinical-trial
#3
Mengqiu Gao, Jingtao Gao, Jian Du, Yuhong Liu, Yao Zhang, Liping Ma, Fengling Mi, Liang Li, Shenjie Tang
BACKGROUND: Shortening the standard 6-month treatment for drug-susceptible pulmonary tuberculosis (DS-PTB) would be a major improvement for TB case management and disease control. METHODS: We are conducting a randomized, open-label, controlled, non-inferiority trial involving patients with smear-positive, newly diagnosed DS-PTB cases nationwide to assess the efficacy and safety of two 4.5- month regimens in comparison to the standard 6-month WHO recommended regimen...
June 19, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28627456/effect-of-the-surface-layer-on-drug-release-from-delefilcon-a-dailies-total1-%C3%A2-contact-lenses
#4
Phillip Dixon, Anuj Chauhan
Contact lenses are receiving significant attention for delivering ophthalmic drugs with higher bioavailability compared to eye drops. Here we explore drug transport from delefilcon-A Dailies Total1(®) lenses which are designed to have a thin, high-water content layer on the surface. Our goal is to determine the impact of this high water content layer on drug transport for both hydrophobic (dexamethasone and cyclosporine) and hydrophilic (timolol and levofloxacin) drugs. Drugs were loaded into the lens by soaking in aqueous drug solutions till equilibrium, followed by release in phosphate buffered saline...
June 13, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28625025/-causative-bacterial-strains-and-sensitivityto-antimicrobial-agents-in-female-acute-uncomplicated-cystitis
#5
Takuya Owari, Tomoki Yamamoto, Shinichiro Mizobuchi, Yositaka Itami, Tomonori Nakahama, Yosihiro Matsumoto, Kaoru Yamada, Hitoshi Momose
Recently, wide spreading of fluoloquinolone resistant Escherichia coli is a serious problem inthe treatment of urinary tract infection. To investigate the causative bacterial strains of female acute uncomplicated cystitis (AUC) in the community and their sensitivity to antimicrobial agents, we retrospectively reviewed the medical records of 215 female AUC patients treated at our clinics from April 2014 to June 2015. Two hundred and nineteen strains were isolated as the causative bacteria from the patients'urine samples, including E...
May 2017: Hinyokika Kiyo. Acta Urologica Japonica
https://www.readbyqxmd.com/read/28619611/an-insight-into-selection-specificity-of-quinolone-resistance-determinants-within-enterobacteriaceae-family
#6
Nivedita Dasgupta, Deepjyoti Paul, Debadatta DharChanda, Birson Ingti, Dibyojyoti Bhattacharjee, Atanu Chakravarty, Amitabha Bhattacharjee
OBJECTIVES: Quinolone antimicrobials are frequently misused due to self-medication and suboptimal dose administration, leading to the development of resistance as well as treatment failure. The present study aimed to characterise plasmid-mediated quinolone resistance (PMQR) determinants and their genetic selection in the presence of quinolone stress within members of the Enterobacteriaceae. METHODS: A total of 209 non-duplicate Enterobacteriaceae isolates were collected from hospital and community health centres over the period July 2013 to June 2014...
June 12, 2017: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/28619105/patterns-of-antimicrobial-resistance-in-intensive-care-unit-patients-a-study-in-vietnam
#7
Giang M Tran, Thao P Ho-Le, Duc T Ha, Chau H Tran-Nguyen, Tuyet S M Nguyen, Thao T N Pham, Tuyet A Nguyen, Dung A Nguyen, Hoa Q Hoang, Ngoc V Tran, Tuan V Nguyen
BACKGROUND: Antimicrobial resistance has emerged as a major concern in developing countries. The present study sought to define the pattern of antimicrobial resistance in ICU patients with ventilator-associated pneumonia. METHODS: Between November 2014 and September 2015, we enrolled 220 patients (average age ~ 71 yr) who were admitted to ICU in a major tertiary hospital in Ho Chi Minh City, Vietnam. Data concerning demographic characteristics and clinical history were collected from each patient...
June 15, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28617882/eradication-rates-in-italian-subjects-heterogeneously-managed-for-helicobacter-pylori-infection-time-to-abandon-empiric-treatments-in-southern-europe
#8
Agostino Di Ciaula, Giuseppe Scaccianoce, Marino Venerito, Angelo Zullo, Leonilde Bonfrate, Theodore Rokkas, Piero Portincasa
BACKGROUND AND AIMS: H. pylori eradication is strongly affected by various factors, including the ongoing antibiotic resistance. We describe a "real life" scenario in patients managed for H. pylori-related conditions, living in a southern Italian region (Apulia), an area with clarithromycin resistance >15%. METHODS: 2,224 subjects were studied in two tertiary referral centers in Apulia. Analyses included: reason for referral, H. pylori infection rates (13C-urea breath test - UBT or upper endoscopy), and eradication rates following distinct regimens previously prescribed or prospectively prescribed (such as the bismuth-based quadruple therapy Pylera®, recently marketed in Italy)...
June 2017: Journal of Gastrointestinal and Liver Diseases: JGLD
https://www.readbyqxmd.com/read/28615866/virulence-assay-and-role-of-bacillus-thuringiensis-ts110-as-biocontrol-agent-against-the-larval-stages-of-rice-leaffolder-cnaphalocrocis-medinalis
#9
Tuhin Subhra Ghosh, Soumendranath Chatterjee, Syed Afrin Azmi, Abhijit Mazumdar, Tushar Kanti Dangar
The bacterial isolate Bacillus thuringiensis TS110 was isolated from the rice field soil of Burdwan district, West Bengal, India. Bioassay test of the bacteria TS110 against 3rd, 4th and 5th instar larvae of Cnaphalocrocis medinalis was carried out. Cut leaf assay, potted plant assay and field assay were done. During filed assay, it has been observed that the LC50 (×10(7)) values of TS110 against 3rd, 4th and 5th instar larvae of C. medinalis were 3.77, 5.29, 4.83 and 4.93, 4.42, 4.72 in dry and wet season, respectively...
June 2017: Journal of Parasitic Diseases: Official Organ of the Indian Society for Parasitology
https://www.readbyqxmd.com/read/28614157/probable-donor-derived-cytomegalovirus-disease-after-keratolimbal-allograft-transplantation
#10
Albert Y Cheung, Amit Govil, Scott R Friedstrom, Edward J Holland
PURPOSE: To report a case of probable donor-derived cytomegalovirus (CMV) infection after keratolimbal allograft (KLAL) transplantation. METHODS: Observational case report. RESULTS: A 41-year-old man with a history of aniridic keratopathy and limbal stem cell deficiency underwent KLAL in his right eye. Preoperatively, he was negative for CMV IgG and IgM. Postoperatively, he was maintained on tacrolimus and mycophenolate mofetil for systemic immunosuppression; he was also on prophylactic valganciclovir (for CMV) and trimethoprim/sulfamethoxazole (for pneumocystis pneumonia) for 1 month...
June 13, 2017: Cornea
https://www.readbyqxmd.com/read/28611739/the-pk-pd-relationship-and-resistance-development-of-danofloxacin-against-mycoplasma-gallisepticum-in-an-in-vivo-infection-model
#11
Nan Zhang, Yuzhi Wu, Zilong Huang, Lihua Yao, Longfei Zhang, Qinren Cai, Xiangguang Shen, Hongxia Jiang, Huanzhong Ding
Mycoplasma gallisepticum is the causative agent of chronic respiratory disease (CRD), a prevalent disease of poultry, which is responsible for significant economic losses in farms. Although several antimicrobial agents are currently recommended for the treatment and prevention of M. gallisepticum infections, investigations of M. gallisepticum have been hampered by their fastidious growth requirements and slow growth rate. As such, little work has been conducted concerning the PK/PD relationship and mechanisms of antibiotic resistance between antimicrobials against M...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28611286/synergistic-antibiotic-effect-of-looped-antimicrobial-peptide-clp-19-with-bactericidal-and-bacteriostatic-agents
#12
Di Li, Ya Yang, Zhiqiang Tian, Jun Lv, Fengjun Sun, Qian Wang, Yao Liu, Peiyuan Xia
The treatment of drug-resistant infections is complicated and the alarming rise in infectious diseases poses a unique challenge for development of effective therapeutic strategies. Antibiotic-induced liberation of the bacterial endotoxin lipopolysaccharide (LPS) may have immediate adverse effects promoting septic shock in patients. In the present study, we first confirmed our previous finding that looped antimicrobial peptide CLP-19 exerts non-specific direct antibacterial activity with no toxic to mammalian cells and second revealed that CLP-19 has synergistic effect to enhance the antibacterial activities of other conventional bactericidal (ampicillin and ceftazidime) and bacteriostatic (erythromycin and levofloxacin) agents...
May 23, 2017: Oncotarget
https://www.readbyqxmd.com/read/28605585/analyses-of-levofloxacin-adsorption-on-pretreated-barley-straw-with-respect-to-temperature-kinetics-%C3%AF-%C3%AF-electron-donor-acceptor-interaction-and-site-energy-distribution
#13
Bei Yan, Catherine Hui Niu, Jian Wang
Levofloxacin, representative of an important class of fluoroquinolone antibiotics, has been considered to be one of the emerging pollutants in various water sources. In this paper, adsorption of levofloxacin from artificial contaminated water was done by pretreated barley straw adsorbent obtained from raw barley straw after modification by H3PO4 impregnation and microwave heating. The adsorption kinetics was investigated at various temperatures and levofloxacin concentrations, and the activation energy was determined...
June 12, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28604271/the-study-on-interactions-between-levofloxacin-and-model-proteins-by-using-multi-spectroscopic-and-molecular-docking-methods
#14
Qing Fang, Chenhui Guo, Yirun Wang, Ying Liu
The interactions of levofloxacin (LEV) with lysozyme (LYZ), trypsin and bovine hemoglobin (BHb) were investigated, respectively by using multi-spectral techniques and molecular docking in vitro. Fluorescence studies showed that LEV quenched LYZ/trypsin fluorescence in a combined quenching ways and BHb fluorescence in a static quenching with binding constants of 0.14, 0.51 and 0.20 × 10(5) L⋅mol(-1) at 298 K, respectively. The thermodynamic parameters demonstrated that hydrophobic forces, hydrogen bonds and van der Waals forces played the major role in the binding process...
June 11, 2017: Journal of Biomolecular Structure & Dynamics
https://www.readbyqxmd.com/read/28602804/in%C3%A2-vitro-emergence-of-fluoroquinolone-resistance-in-cutibacterium-formerly-propionibacterium-acnes-and-molecular-characterization-of-mutations-in-the-gyra-gene
#15
Eve-Marie Takoudju, Aurélie Guillouzouic, Stanimir Kambarev, Frédéric Pecorari, Stéphane Corvec
In vitro occurrence of levofloxacin (LVX) resistance in C. acnes and characterization of its molecular background were investigated. The mutation frequency was determined by inoculation of 10(8) cfu of C. acnes ATCC 11827 (LVX MIC = 0.25 mg/L) on LVX-containing agar plates. The progressive emergence of resistance was studied by a second exposure to increasing LVX concentrations. For mutants, the QRDR regions including the gyrA and parC genes were sequenced and compared to both C. acnes ATCC 11827 and C...
June 8, 2017: Anaerobe
https://www.readbyqxmd.com/read/28599158/degradation-of-highly-consumed-fluoroquinolones-penicillins-and-cephalosporins-in-distilled-water-and-simulated-hospital-wastewater-by-uv254-and-uv254-persulfate-processes
#16
Efraím A Serna-Galvis, Franklin Ferraro, Javier Silva-Agredo, Ricardo A Torres-Palma
In this work, three penicillins (ampicillin "AMP", oxacillin "OXA" and cloxacillin "CLO"), two cephalosporins (cephalexin "CPX" and cephadroxyl "CPD") and three fluoroquinolones (levofloxacin "LEV", norfloxacin "NOR" and ciprofloxacin "CIP") were initially treated by UV254 and persulfate activated by UV254 (UV/PS). Significant differences in degradation kinetics under UV254 irradiation were found. Photodegradation followed the order: OXA > CPX > CPD > CLO > CIP > NOR > AMP ≫ LEV...
June 1, 2017: Water Research
https://www.readbyqxmd.com/read/28598311/in-vitro-activity-of-sitafloxacin-against-mycobacterium-tuberculosis-with-gyra-b-mutations-isolated-in-japan
#17
Lina Yi, Akio Aono, Kinuyo Chikamatsu, Yuriko Igarashi, Hiroyuki Yamada, Akiko Takaki, Satoshi Mitarai
PURPOSE: Sitafloxacin (SFX) is a new fluoroquinolone (FQ) that has shown a strong bactericidal effect against Mycobacterium tuberculosis (Mtb) in vitro. However, data on SFX efficacy against Mtb with gyrA/B mutations and its epidemiological cut-off (ECOFF) value remain limited. Therefore, we evaluated and compared the in vitro activity of SFX against gyrA/B-mutant Mtb to that of moxifloxacin (MFX), levofloxacin (LFX) and ciprofloxacin (CFX), and determined the ECOFF for SFX. METHODOLOGY: A total of 109 clinical Mtb isolates, including 73 multidrug-resistant (MDR) isolates, were subjected to minimum inhibitory concentration (MIC) analysis in oleic-albumin-dextrose-catalase (OADC)-supplemented Middlebrook 7H9 medium...
June 9, 2017: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28597192/pre-banking-microbial-contamination-of-donor-conjunctiva-and-storage-medium-for-penetrating-keratoplasty
#18
Takenori Inomata, Koichi Ono, Tsuyoshi Matsuba, Tina Shiang, Antonio Di Zazzo, Satoru Nakatani, Masahiro Yamaguchi, Nobuyuki Ebihara, Akira Murakami
PURPOSE: The aims of this study were to investigate the incidence of positive donor tissue cultures before transfer to preservation medium (Optisol™-GS) for penetrating keratoplasty, to verify the efficacy of antibiotics contained in Optisol™-GS by examining the drug susceptibility and to assess the relationship between the results of our microbial assessments as well as donor factors and the incidence of contamination. METHODS: We conducted a retrospective, cross-sectional study using Juntendo Eye Bank records for all corneal transplantations...
June 8, 2017: Japanese Journal of Ophthalmology
https://www.readbyqxmd.com/read/28594635/epidemiology-of-carbapenem-resistant-klebsiella-pneumoniae-bloodstream-infections-in-a-chinese-children-s-hospital-predominance-of-new-delhi-metallo-%C3%AE-lactamase-1
#19
Fang Dong, Ye Zhang, Kaihu Yao, Jie Lu, Lingyun Guo, Shuang Lyu, Ying Yang, Yan Wang, Hongyan Zheng, Wenqi Song, Gang Liu
The spread of carbapenem-resistant Klebsiella pneumoniae (CRKp) has become a significant problem worldwide; however, relevant data in children are limited. We performed a retrospective study to better understand the epidemiology of CRKp bloodstream infections at Beijing Children's Hospital. A total of 164 K. pneumoniae strains were collected from blood cultures between January 2011 and September 2014, of which 52 (31.7%) were CRKp strains. All 52 CRKp strains were multidrug resistant; 46 (88.5%) and 49 (94...
June 8, 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/28594345/synthesis-and-evaluation-of-antimicrobial-activity-of-r%C3%A2-w%C3%A2-k-levofloxacin-and-r%C3%A2-w%C3%A2-k-levofloxacin-q-conjugates
#20
Neda Riahifard, Kathy Tavakoli, Jason Yamaki, Keykavous Parang, Rakesh Tiwari
The development of a new class of antibiotics to fight bacterial resistance is a time-consuming effort associated with high-cost and commercial risks. Thus, modification, conjugation or combination of existing antibiotics to enhance their efficacy is a suitable strategy. We have previously reported that the amphiphilic cyclic peptide [R₄W₄] had antibacterial activity with a minimum inhibitory concentration (MIC) of 2.97 µg/mL against Methicillin-resistant Staphylococcus aureus (MRSA). Herein, we hypothesized that conjugation or combination of the amphiphilic cyclic peptide [R₄W₄] with levofloxacin or levofloxacin-Q could improve the antibacterial activity of levofloxacin and levofloxacin-Q...
June 8, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
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