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https://www.readbyqxmd.com/read/28741299/a-review-of-moxifloxacin-for-the-treatment-of-drug-susceptible-tuberculosis
#1
REVIEW
Anushka Naidoo, Kogieleum Naidoo, Helen McIlleron, Sabiha Essack, Nesri Padayatchi
Moxifloxacin, an 8-methoxy quinolone, is an important drug in the treatment of multidrug-resistant tuberculosis and is being investigated in novel drug regimens with pretomanid, bedaquiline, and pyrazinamide, or rifapentine, for the treatment of drug-susceptible tuberculosis. Early results of these studies are promising. Although current evidence does not support the use of moxifloxacin in treatment-shortening regimens for drug-susceptible tuberculosis, it may be recommended in patients unable to tolerate standard first-line drug regimens or for isoniazid monoresistance...
July 24, 2017: Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28735058/prevalence-of-pmqr-genes-in-e-coli-and-klebsiella-spp-isolated-from-north-west-of-morocco
#2
Houda Benaicha, Said Barrijal, Fatima Ezzakkioui, Fatima Elmalki
OBJECTIVES: Plasmid mediated quinolone resistance (PMQR) genes are increasingly detected worldwide. However, in Morocco a few studies have been carried out. The aim of this study was to investigate the prevalence of these determinants among Escherichia coli and Klebsiella spp isolated from North-West of Morocco. METHODS: The prevalence of PMQR genes was investigated among 398 E. coli and 118 Klebsiella spp clinical isolates collected between 2012 and 2015 from North-West of Morocco...
July 19, 2017: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/28735057/brazil-s-resolutions-to-regulate-the-sale-of-antibiotics-impact-on-consumption-and-escherichia-coli-resistance-rates
#3
Karen P H Mattos, Marília B Visacri, Júlia C F Quintanilha, Gustavo R Lloret, Maria A Cursino, Anna S Levin, Carlos E Levy, Patricia Moriel
OBJECTIVE: The aim of this study was to determine the impact of two resolutions to restrict antibiotic use (RDCs no. 44/2010 and 20/2011) in the Campinas metropolitan area (Sao Paulo, Brazil) on antibiotic consumption, resistance rates, and trends in Escherichia coli-causing community-acquired urinary tract infection (UTI). METHODS: The annual retail sale information of antibiotics from drugstores in the Campinas metropolitan area between 2008 and 2012 were obtained through the Intercontinental Medical Statistics Health of Brazil...
July 19, 2017: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/28734246/topological-pattern-for-the-search-of-new-active-drugs-against-methicillin-resistant-staphylococcus-aureus
#4
Jose I Bueso-Bordils, Maria T Perez-Gracia, Beatriz Suay-Garcia, Maria J Duart, Rafael V Martin Algarra, Luis Lahuerta Zamora, Gerardo M Anton-Fos, Pedro A Aleman Lopez
Molecular topology was used to develop a mathematical model capable of classifying compounds according to antimicrobial activity against methicillin resistant Staphylococcus aureus (MRSA). Topological indices were used as structural descriptors and their relation to antimicrobial activity was determined by using linear discriminant analysis. This topological model establishes new structure activity relationships which show that the presence of cyclopropyl, chlorine and ramification pairs at a distance of two bonds favor this activity, while the presence of tertiary amines decreases it...
July 8, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28732788/occurrence-and-clonal-diversity-of-multidrug-resistant-klebsiella-pneumoniae-recovered-from-inanimate-surfaces-in-algerian-hospital-environment-first-report-of-arma-qnrb-and-aac-6-ib-cr-genes
#5
Karima Zenati, Farida Sahli, Vincent Garcia, Sofiane Bakour, Djellali Belhadi, Jean Marc Rolain, Abdelaziz Touati
PURPOSE: The aim of this study is to characterize the molecular support of antibiotic resistance in MDR K. pneumonaie recovered from inanimate surfaces between March 2012 to February 2014 in three teaching hospitals (Setif, Bejaia and Constantine) in Algeria. RESULTS: Forty four K. pneumoniae producing ESBL were detected and blaCTX-M-15 and blaCTX-M-3 were detected respectively in 41 and 3 isolates. These K. pneumoniae isolates producing ESBL were also resistant to gentamicin (87%), tobramicin (87%), ciprofloxacin (66%) and ofloxacin (62%)...
July 18, 2017: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/28729302/vosaroxin-in-combination-with-decitabine-in-newly-diagnosed-older-patients-with-acute-myeloid-leukemia-or-high-risk-mds
#6
Naval Daver, Hagop Kantarjian, Guillermo Garcia-Manero, Elias Jabbour, Gautam Borthakur, Mark Brandt, Sherry Pierce, Kenneth Vaughan, Jing Ning, Graciela M Nogueras González, Keyur Patel, Jeff Jorgensen, Naveen Pemmaraju, Tapan Kadia, Marina Konopleva, Michael Andreeff, Courtney DiNardo, Jorge Cortes, Renee Ward, Adam Craig, Farhad Ravandi
Vosaroxin is an anti-cancer quinolone derived DNA topoisomerase II inhibitor. We investigated vosaroxin with decitabine in patients ≥ 60 years of age with newly diagnosed acute myeloid leukemia (AML) (n=58) or myelodysplastic syndrome (MDS) (≥ 10% blasts) (n=7) in a phase 2 non-randomized trial. The initial 22 patients received vosaroxin 90 mg/m2 on Days 1 and 4 with decitabine 20 mg/m2 Days 1-5 every 4-6 weeks for up to 7 cycles. Due to high incidence of mucositis the subsequent 43 patients received vosaroxin 70 mg/m2 Days 1 and 4...
July 20, 2017: Haematologica
https://www.readbyqxmd.com/read/28728202/-pyogenic-liver-abscess-changes-of-organisms-and-consequences-for-diagnosis-and-therapy
#7
Alexander Mischnik, Winfried Vincenz Kern, Robert Thimme
Liver abscess is a rare but potentially fatal disease with mortality rates of 2 - 12 %. The spectrum of causative microorganisms varies across the world and is changing due to increasing worldwide travel activity. As a result, previously less frequent pathogens must increasingly be considered in the differential diagnosis. The most common pathogens of liver abscess are so-called abscess streptococci, anaerobes and Gram-negative bacteria such as Escherichia coli and Klebsiella pneumoniae. Certain clones among the Gram-negatives, typically among Klebsiella spp...
July 2017: Deutsche Medizinische Wochenschrift
https://www.readbyqxmd.com/read/28727330/-lower-urinary-tract-infections-in-men-urethritis-cystitis-and-prostatitis
#8
Marie-Céline Zanella, Fabian Schoofs, Benedikt Huttner, Angela Huttner
Recommendations for the treatment of lower non-catheter-related urinary tract infection (UTI) in men are rarely evidence-based. Their management requires the localization of the site of infection, whether it be the urethra, bladder or prostate, and includes antibiotic therapy and in most cases urological assessment. They are often associated with urinary tract procedures or anatomical or functional abnormalities. Nearly 80 % of male UTIs are caused by Enterobacteriaceae. The prevalence of broad-spectrum beta-lactamase-producing strains (ESBL) and quinolone-resistant strains is increasing...
April 12, 2017: Revue Médicale Suisse
https://www.readbyqxmd.com/read/28722171/use-of-antibiotics-during-pregnancy-and-the-risk-of-major-congenital-malformations-a-population-based-cohort-study
#9
Flory T Muanda, Odile Sheehy, Anick Bérard
INTRODUCTION: Few studies have investigated the link between individual antibiotics and major congenital malformations (MCMs) including specific malformations owing to small sample size. We aimed to quantify the association between exposure to gestational antibiotic and the risk of MCMs. METHODS: Using the Quebec pregnancy cohort (1998 -2008), we included a total of 139,938 liveborn singleton alive whose mothers were covered by the «Régie de l'assurance maladie du Québec" drug plan for at least 12 months before and during pregnancy...
July 19, 2017: British Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28721078/incomplete-recovery-of-the-fecal-flora-of-hematological-patients-with-neutropenia-and-repeated-fluoroquinolone-prophylaxis
#10
Yong Chong, Shinji Shimoda, Noriko Miyake, Takatoshi Aoki, Yoshikiyo Ito, Tomohiko Kamimura, Nobuyuki Shimono
BACKGROUND: Routine fluoroquinolone prophylaxis in neutropenic patients with hematological malignancies is still controversial, because of antibiotic resistance concerns. The recovery of the fecal microbiota to the initial composition in patients receiving multiple courses of quinolone prophylaxis and repeated chemotherapy has not been evaluated. METHODS: We prospectively examined the changes in the fecal bacterial composition before and after levofloxacin prophylaxis...
2017: Infection and Drug Resistance
https://www.readbyqxmd.com/read/28720732/pseudomonas-aeruginosa-alters-staphylococcus-aureus-sensitivity-to-vancomycin-in-a-biofilm-model-of-cystic-fibrosis-infection
#11
Giulia Orazi, George A O'Toole
The airways of cystic fibrosis (CF) patients have thick mucus, which fosters chronic, polymicrobial infections. Pseudomonas aeruginosa and Staphylococcus aureus are two of the most prevalent respiratory pathogens in CF patients. In this study, we tested whether P. aeruginosa influences the susceptibility of S. aureus to frontline antibiotics used to treat CF lung infections. Using our in vitro coculture model, we observed that addition of P. aeruginosa supernatants to S. aureus biofilms grown either on epithelial cells or on plastic significantly decreased the susceptibility of S...
July 18, 2017: MBio
https://www.readbyqxmd.com/read/28718238/bacteriology-of-diabetic-foot-in-tertiary-care-hospital-frequency-antibiotic-susceptibility-and-risk-factors
#12
Syeda Sadia Amjad, Jamal Zafar, Nadia Shams
BACKGROUND: Diabetic foot being one of the frequent and disabling complications of diabetes. In view of widespread regional variation in causative organisms and antimicrobial susceptibility, the current study aimed to determine frequency of causative organisms, their antimicrobial susceptibility and associated risk factors. METHODS: This descriptive cross-sectional study was conducted in 6 months' duration at dept. of Medicine; PIMS Hospital Islamabad. Type 2 Diabetes mellitus patients with diabetic foot ulcer were enrolled after informed consent...
April 2017: Journal of Ayub Medical College, Abbottabad: JAMC
https://www.readbyqxmd.com/read/28717075/clinical-characteristics-of-bacteremia-caused-by-extended-spectrum-beta-lactamase-producing-escherichia-coli-at-a-tertiary-hospital
#13
Hiroki Namikawa, Koichi Yamada, Hiroki Fujimoto, Ken-Ichi Oinuma, Yoshihiro Tochino, Yasuhiko Takemoto, Yukihiro Kaneko, Taichi Shuto, Hiroshi Kakeya
Objective In recent years, infection caused by extended-spectrum beta-lactamase (ESBL)-producing organisms has become an important issue. However, comparative studies of the bacteremia caused by ESBL Enterobacteriaceae and non-ESBL Enterobacteriaceae are extremely rare in Japan. This study aimed to assess the risk factors and prognosis of patients with bacteremia due to ESBL Escherichia coli (E. coli). Methods The medical records of 31 patients with ESBL E. coli bacteremia and 98 patients with non-ESBL E. coli bacteremia who had been admitted to Osaka City University Hospital between January 2011 and June 2015 were retrospectively reviewed...
2017: Internal Medicine
https://www.readbyqxmd.com/read/28715707/design-synthesis-and-2d-qsar-study-of-novel-pyridine-and-quinolone-hydrazone-derivatives-as-potential-antimicrobial-and-antitubercular-agents
#14
Mohamed A Abdelrahman, Ismail Salama, Mohamed S Gomaa, Mahmoud M Elaasser, Marwa M Abdel-Aziz, Dalia H Soliman
The increased development of highly resistant bacterial strains and tuberculosis, constitute a serious public health threat, highlighting the urgent need of novel antibacterial agents. In this work, two novel series of nicotinic acid hydrazone derivatives (6a-r) and quinolone hydrazide derivatives (12a-l) were synthesized and evaluated as antimicrobial and antitubercular agents. The synthesized compounds were evaluated in vitro for their antibacterial, antifungal and antimycobacterial activities. Compounds 6f and 6p bearing the 3,4,5- (OCH3)3 and 2,5-(OCH3)2 benzylidene motifs were the most potent and as antibacterial, antifungal (MIC: 0...
July 4, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28712540/aqueous-humor-tyrosinase-activity-is-indicative-of-iris-melanocyte-toxicity
#15
Sarmistha Mahanty, Ankush A Kawali, Shruthi Shirur Dakappa, Padmamalini Mahendradas, Mathew Kurian, Varun Kharbanda, Rohit Shetty, Subba Rao Gangi Setty
Antibiotics such as fluoroquinolones (FQLs) are commonly used to treat ocular infections but are also known to cause dermal melanocyte toxicity. The release of dispersed pigments from the iris into the aqueous humor has been considered a possible ocular side effect of the systemic administration of FQLs such as Moxifloxacin, and this condition is known as bilateral acute iris transillumination (BAIT). Bilateral acute depigmentation of iris (BADI) is a similar condition, with iris pigment released into the aqueous, but it has not been reported as a side effect of FQL...
July 13, 2017: Experimental Eye Research
https://www.readbyqxmd.com/read/28711438/citrobacter-freundii-bacteremia-risk-factors-of-mortality-and-prevalence-of-resistance-genes
#16
Li-Hsiang Liu, Nai-Yu Wang, Alice Ying-Jung Wu, Chih-Chen Lin, Chun-Ming Lee, Chang-Pan Liu
BACKGROUND/PURPOSE: Multidrug-resistant strains of Citrobacter have emerged, which carry Amp-C β-lactamase (Amp-C), broad-spectrum β-lactamase, extended-spectrum β-lactamase (ESBL), and other resistance mechanisms. These strains are associated with a higher rate of in-hospital mortality. The object of this study is to determine the mortality risk factors, susceptibility pattern to antibiotics, and prevalence of resistance genes in patients with Citrobacter freundii bacteremia. METHODS: From January 2009 to December 2014, blood isolates of C...
June 22, 2017: Journal of Microbiology, Immunology, and Infection, Wei Mian Yu Gan Ran za Zhi
https://www.readbyqxmd.com/read/28711315/characterization-of-mobile-genetic-elements-carrying-vim-1-and-kpc-2-carbapenemases-in-citrobacter-freundii-isolates-in-madrid
#17
Jennifer Villa, David M Arana, Esther Viedma, Dafne Perez-Montarelo, Fernando Chaves
Carbapenemase producing Citrobacter freundii (CPCF) infections are still uncommon in European countries. Here we report a molecular study conducted in a tertiary care facility in southern Madrid, Spain, from 2009 to 2014 to investigate the epidemiology of CPCF. The blaIMP-1,blaIMP-2,blaKPC,blaNDM,blaOXA-48,blaVIM-1 and blaVIM-2 genes were screened by PCR. Molecular typing was carried out by Pulsed-field gel electrophoresis analysis (PFGE) and multilocus sequence typing (MLST). Whole genome sequencing (WGS) was performed to characterize the resistome and the mobile genetic elements associated with the carbapenems resistance of CPCF...
July 8, 2017: International Journal of Medical Microbiology: IJMM
https://www.readbyqxmd.com/read/28710755/rapid-detection-of-bacterial-susceptibility-or-resistance-to-quinolones
#18
Fátima Otero, Rebeca Santiso, María Tamayo, Germán Bou, Jaime Gosálvez, José Luis Fernández
The emergence of multidrug resistant microorganisms together with the decline in discovery and development of new antibiotics is of great concern in health-care policy. In this alarming context, an early and well-tailored antibiotic therapy is a relevant strategy not only to improve clinical outcome but also to avoid appearance and spreading of perilous resistant strains. One of the most common antibiotic classes is fluoroquinolones. They trap the DNA girase and/or topoisomerase IV on the DNA, resulting in DNA fragmentation...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28708938/interactions-between-quinolones-and-bacillus-anthracis-gyrase-and-the-basis-of-drug-resistance
#19
Rachel E Ashley, Robert Hunter Lindsey, Sylvia A McPherson, Charles L Turnbough, Robert J Kerns, Neil Osheroff
Gyrase appears to be the primary cellular target for quinolone antibacterials in multiple pathogenic bacteria, including Bacillus anthracis, the causative agent of anthrax. Given the significance of this type II topoisomerase as a drug target, it is critical to understand how quinolones interact with gyrase and how specific mutations lead to resistance. However, these important issues have yet to be addressed for a canonical gyrase. Therefore, we utilized a mechanistic approach to characterize quinolone interactions with wild-type B...
July 14, 2017: Biochemistry
https://www.readbyqxmd.com/read/28708306/a-toolbox-of-chromones-and-quinolones-for-measuring-a-wide-range-of-atp-concentrations
#20
Vasyl Georgievich Pivovarenko, Oleksandra Bugera, Nicolas Humbert, Andrey Sergeevich Klymchenko, Yves Mély
A series of 26 3-hydroxychromones, three bis-flavonols and four 3-hydroxyquinolones were studied to evaluate their fluorescence response to interaction with ATP in buffer. The dyes differ by the total charge, the size and number of their aromatic units, as well as the position or electron donating ability of their substituents. All of them were suggested to form complexes with ATP of 1:1 and 1:2 stoichiometry, which can be evidenced by their bright fluorescence and their 3000-6000 cm-1 red-shifted excitation band...
July 14, 2017: Chemistry: a European Journal
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