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https://www.readbyqxmd.com/read/29352469/amoxicillin-current-use-in-swine-medicine
#1
REVIEW
D G S Burch, D Sperling
Amoxicillin has become a major antimicrobial substance in pig medicine for the treatment and control of severe, systemic infections such as Streptococcus suis. The minimum inhibitory concentration 90% (MIC 90) is 0.06 μg amoxicillin/ml, and the proposed epidemiological cut-off value (ECOFF) is 0.5 μg/ml, giving only 0.7% of isolates above the ECOFF or of reduced susceptibility. Clinical breakpoints have not been set for amoxicillin against porcine pathogens yet, hence the use of ECOFFs. It has also been successfully used for bacterial respiratory infections caused by Actinobacillus pleuropneumoniae and Pasteurella multocida...
January 19, 2018: Journal of Veterinary Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/29352087/subtype-specific-selection-for-resistance-to-fluoroquinolones-but-not-to-tetracyclines-occurs-in-campylobacter-jejuni-from-beef-cattle-in-confined-feeding-operations-in-southern-alberta-canada
#2
Andrew L Webb, L Brent Selinger, Eduardo N Taboada, G Douglas Inglis
Campylobacter jejuni was longitudinally isolated from beef cattle housed in four confined feeding operations (CFOs) in southern Alberta over 18 months. All of the cattle were administered a variety of antimicrobial agents (AMAs) non-therapeutically and metaphylactically during their time in the CFOs. In total, 7966 C. jejuni isolates were recovered from cattle. More animals were colonized by the bacterium after >60 days in the CFO (i.e. interim) compared to individuals upon entry at the CFO (i.e. arrival)...
January 19, 2018: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29351187/high-proportions-of-multidrug-resistant-acinetobacter-spp-isolates-in-a-district-in-western-india-a-four-year-antibiotic-susceptibility-study-of-clinical-isolates
#3
Ingvild Odsbu, Smita Khedkar, Uday Khedkar, Sandeep S Nerkar, Ashok J Tamhankar, Cecilia Stålsby Lundborg
The purpose of the study was to determine the proportions of multidrug-resistant (MDR) Acinetobacter spp. isolates from the district of Nashik in Western India during the period from 2011-2014. Antibacterial susceptibility testing of isolates from inpatients and outpatients was performed using Kirby-Bauer disc diffusion method to determine inhibitory zone diameters. Proportions of non-susceptible isolates were calculated from the antibacterial susceptibility data. MDR was defined as an isolate being non-susceptible to at least one antibacterial agent in at least three antibacterial categories...
January 19, 2018: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29350154/use-of-pristinamycin-for-macrolide-resistant-mycoplasma-genitalium-infection
#4
Tim R H Read, Jørgen S Jensen, Christopher K Fairley, Mieken Grant, Jennifer A Danielewski, Jenny Su, Gerald L Murray, Eric P F Chow, Karen Worthington, Suzanne M Garland, Sepehr N Tabrizi, Catriona S Bradshaw
High levels of macrolide resistance and increasing fluoroquinolone resistance are found in Mycoplasma genitalium in many countries. We evaluated pristinamycin for macrolide-resistant M. genitalium in a sexual health center in Australia. Microbiologic cure was determined by M. genitalium-specific 16S PCR 14-90 days after treatment began. Of 114 persons treated with pristinamycin, infection was cured in 85 (75%). This percentage did not change when pristinamycin was given at daily doses of 2 g or 4 g or at 3 g combined with 200 mg doxycycline...
February 2018: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/29348049/cui-and-cuii-complexes-with-phosphine-derivatives-of-fluoroquinolone-antibiotics-a-comparative-study-on-the-cytotoxic-mode-of-action
#5
Aleksandra Bykowska, Urszula K Komarnicka, Małgorzata Jeżowska-Bojczuk, Agnieszka Kyzioł
In this paper, we present a comparative study on the cytotoxic mode of action of copper(I) and copper(II) complexes with phosphine derivatives of fluoroquinolone antibiotics (ciprofloxacin HCp and norfloxacin HNr). The in vitro cytotoxic activity of four new compounds was tested against two selected cancer cell lines. All complexes exhibited much better cytotoxicity against both cell lines than unmodified fluoroquinolone antibiotics, their phosphines (PCp, PNr), chalcogenide derivatives (oxides: OPCp, OPNr; sulfides: SPCp, SPNr and selenides: SePCp, SePNr) and previously described by us complexes with phosphines derived from different fluoroquinolones: lomefloxacin (HLm) and sparfloxacin (HSf) as well as cisplatin...
January 9, 2018: Journal of Inorganic Biochemistry
https://www.readbyqxmd.com/read/29347843/combinatorial-design-and-virtual-screening-of-potent-anti-tubercular-fluoroquinolone-and-isothiazoloquinolone-compounds-utilizing-qsar-and-pharmacophore-modelling
#6
S Nandi, S Ahmed, A K Saxena
The virulence of tuberculosis infections resistant to conventional combination drug regimens cries for the design of potent fluoroquinolone compounds to be used as second line antimycobacterial chemotherapeutics. One of the most effective in silico methods is combinatorial design and high throughput screening by a ligand-based pharmacophore prior to experiment. The combinatorial design of a series of 3850 fluoroquinolone and isothiazoloquinolone compounds was then screened virtually by applying a topological descriptor based quantitative structure activity relationship (QSAR) for predicting highly active congeneric quinolone leads against Mycobacterium fortuitum and Mycobacterium smegmatis...
February 2018: SAR and QSAR in Environmental Research
https://www.readbyqxmd.com/read/29345957/besifloxacin-a-critical-review-of-its-characteristics-properties-and-analytical-methods
#7
Eliane Gandolpho Tótoli, Hérida Regina Nunes Salgado
Bacterial conjunctivitis has high impact on the health of the population, since it represents more than a third of ocular pathologies reported by health services worldwide. There is a high incidence of bacterial resistance to the antimicrobials most commonly used for the treatment of conjunctivitis. In this context, besifloxacin stands out, since it is a fluoroquinolone developed exclusively for topical ophthalmic use, presenting a low risk of developing resistance due to its reduced systemic exposure. Bausch & Lomb markets it as ophthalmic suspension, under the trade name Besivance™...
January 18, 2018: Critical Reviews in Analytical Chemistry
https://www.readbyqxmd.com/read/29341837/ocular-permeation-of-topical-tazocin-and-its-effectiveness-in-the-treatment-of-pseudomonas-aeruginosa-induced-keratitis-in-rabbits
#8
Sujaya Singh, Renu Agarwal, Zulhilmi Abdul Razak, Robin Ngu, Lwin L Nyein, Sushil Vasudevan, Marina Kapitonova, Azida Juana Kadir, Subrayan Visvaraja
PURPOSE: Pseudomonas aeruginosa is the most common causative organism for contact lens-associated corneal ulcer and is commonly treated with fluoroquinolones. With the emergence of resistant strains, it is important to investigate alternative therapies. Despite well-established efficacy of tazocin against systemic Pseudomonas infections, its topical use for the treatment of Pseudomonas keratitis has not been described, hence this study was aimed to find the ocular permeation of Tazocin and its efficacy in treating keratitis in rabbit eyes...
January 17, 2018: Journal of Ocular Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/29340602/emergence-of-blactx-m-55-associated-with-fosa-rmtb-and-mcr-gene-variants-in-escherichia-coli-from-various-animal-species-in-france
#9
Agnese Lupo, Estelle Saras, Jean-Yves Madec, Marisa Haenni
Objectives: In Asian countries, blaCTX-M-55 is the second most common ESBL-encoding gene. blaCTX-M-55 frequently co-localizes with fosA and rmtB genes on epidemic plasmids, which remain sporadic outside Asia. During 2010-13, we investigated CTX-M-55-producing Escherichia coli isolates and their co-resistance to fosfomycin, aminoglycosides, fluoroquinolones and colistin as part of a global survey of ESBLs in animals in France. Methods: blaCTX-M-55, fosA, rmtB and plasmidic quinolone and colistin resistance genes were characterized by PCR, sequencing and hybridization experiments...
January 10, 2018: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/29339395/efficacy-and-safety-of-finafloxacin-versus-ciprofloxacin-in-the-treatment-of-complicated-urinary-tract-infections-an-explorative-randomized-phase-ii-clinical-study
#10
F Wagenlehner, M Nowicki, C Bentley, M Lückermann, S Wohlert, C Fischer, A Vente, K Naber, A Dalhoff
INTRODUCTION: The broad spectrum C-8-cyano-fluoroquinolone finafloxacin displays enhanced activity at acidic conditions. This phase II clinical study compared efficacy and safety of finafloxacin and ciprofloxacin in patients with complicated urinary tract infection and/or pyelonephritis. RESULTS: A 5-day regimen with finafloxacin 800 mg q.d. (FINA05) had similar results as a 10-day regimen with finafloxacin 800 mg q.d. (FINA10). Combined microbiological and clinical responses at test of cure visit (TOC) were 70% for FINA05, 68% for FINA10, and 57% for a 10-day ciprofloxacin regimen (CIPRO10) in 193 (64 for FINA05, 68 for FINA10 and 61 for CIPRO10) patients of the microbiological intent-to-treat (mITT) population...
January 16, 2018: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29339394/population-pharmacokinetics-of-finafloxacin-in-healthy-volunteers-and-patients-with-complicated-urinary-tract-infections
#11
Max Taubert, Mark Lückermann, Andreas Vente, Axel Dalhoff, Uwe Fuhr
Background: Finafloxacin is a novel fluoroquinolone with increased antibacterial activity at acidic pH and reduced susceptibility to several resistance mechanisms. A phase II study revealed a good efficacy/safety profile in patients with complicated urinary tract infections (cUTI) while pharmacokinetics was characterized by highly variable concentration vs. time profiles, suggesting the need for an elaborated pharmacokinetic model.Methods: Data from three clinical trials were evaluated; 127 healthy volunteers were dosed orally (N=77) or intravenously (N=50) and 139 patients with cUTI received finafloxacin intravenously...
January 16, 2018: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29339393/early-clinical-assessment-of-the-antimicrobial-activity-of-finafloxacin-compared-to-ciprofloxacin-in-sub-sets-of-microbiologically-characterized-isolates
#12
Andreas Vente, Christine Bentley, Mark Lückermann, Paul Tambyah, Axel Dalhoff
INTRODUCTION: Two phase II studies were performed in patients with uncomplicated (uUTI) and complicated urinary tract infections or acute pyelonephritis (cUTI/PN) to compare finafloxacin (300 mg b.i.d, p.o. for uUTI 800 mg q.d., i.v. for cUTI/PN) and ciprofloxacin (250 mg b.i.d, p.o. for uUTI and 400 mg b.i.d., i.v. for cUTI/PN). The early response to the study medications was evaluated in the microbiological-intent-to treat population (mITT) at day 3. RESULTS: 21% of the isolates were ciprofloxacin-resistant, 13...
January 16, 2018: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29339298/implementation-and-impact-of-an-audit-and-feedback-antimicrobial-stewardship-intervention-in-the-orthopaedics-department-of-a-tertiary-care-hospital-a-controlled-interrupted-time-series-study
#13
Margarida Tavares, Ana Cláudia Carvalho, José Pedro Almeida, Paulo Andrade, Ricardo São Simão, Pedro Soares, Carlos Alves, Rui Pinto, Arnaud Fontanet, Laurence Watier
A prospective audit and feedback antimicrobial stewardship intervention conducted in the Orthopaedics Department of a University Hospital in Portugal was evaluated by comparing an interrupted time series in an intervention group and a non-intervention (control) group. Monthly antibiotic use (except cefazolin) was measured as World Health Organization- and Anatomical Therapeutic Chemical-defined daily doses (DDD) from January 2012 to September 2016, excluding the 6-month phase of intervention implementation starting on January 1, 2015...
January 12, 2018: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/29339296/silent-transmission-of-an-is1294b-deactivated-mcr-1-gene-with-inducible-colistin-resistance
#14
Kai Zhou, Qixia Luo, Qin Wang, Chen Huang, Haifeng Lu, Rossen W A John, Yonghong Xiao, Lanjuan Li
The global dissemination of the mobile colistin resistance mcr-1 is of special concern, as colistin is one of the last-resort antibiotics for the treatment of severe infections caused by carbapenem-resistant Gram-negative bacteria. Here, we characterized an inactive form of mcr-1 in a fluoroquinolone-resistant and colistin-susceptible uropathogenic Escherichia coli isolate (ECO3347). The mcr-1 gene was deactivated by the insertion of a 1.7-Kb IS1294b element flanked by two tetramers (GTTC), and located on a 62-Kb pHNSHP45-like plasmid (p3347-mcr-1)...
January 12, 2018: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/29337862/therapeutic-management-of-pseudomonas-aeruginosa-bloodstream-infection-non-susceptible-to-carbapenems-but-susceptible-to-old-cephalosporins-and-or-to-penicillins
#15
Ronit Zaidenstein, Asaf Miller, Ruthy Tal-Jasper, Hadas Ofer-Friedman, Menachem Sklarz, David E Katz, Tsillia Lazarovitch, Paul R Lephart, Bethlehem Mengesha, Oran Tzuman, Mor Dadon, Chen Daniel, Jacob Moran-Gilad, Dror Marchaim
It is unknown as to whether other beta-lactams can be used for bloodstream infections (BSI) resulting from Pseudomonas aeruginosa (PA) which are non-susceptible to one or more carbapenem. We conducted a retrospective cohort study at the Assaf Harofeh Medical Center (AHMC) from January 2010 to August 2014. Adult patients with PA-BSI non-susceptible to a group 2 carbapenem but susceptible to ceftazidime or piperacillin (with or without tazobactam), were enrolled. We compared the outcomes of patients who received an appropriate beta-lactam antibiotic ("cases") to those who received an appropriate non-beta-lactam antibiotic ("controls")...
January 16, 2018: Microorganisms
https://www.readbyqxmd.com/read/29336679/arcobacter-butzleri-ciprofloxacin-resistance-point-mutations-in-dna-gyrase-a-and-role-on-fitness-cost
#16
Susana Ferreira, Daniela R Correia, Mónica Oleastro, Fernanda C Domingues
Arcobacter butzleri is a widely distributed emerging pathogen resistant to various classes of antimicrobial agents, namely fluoroquinolones. A. butzleri resistance to fluoroquinolones is conferred by point mutations at the antibiotic target. The aim of this study was to evaluate mutations at gyrA associated with ciprofloxacin resistance and evaluate whether acquisition of resistance impacts on fitness and stress tolerance of A. butzleri. A. butzleri ciprofloxacin mutants were generated by laboratory induction...
January 16, 2018: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/29334747/-drug-induced-tendon-injury
#17
Štefan Alušík, Zoltán Paluch
Tendon injury belongs to the less known side effects of some drugs, reported until recently only for glucocorticoids and fluoroquinolones. To date, some other classes of drugs such as statins, aromatase inhibitors, anabolic steroids, potentially causing tendon injury, have been added to the list. The authors discuss the most common clinical presentations, diagnosis, and management as well as latest experimental data regarding this issue. The most often, the Achilles tendon is affected, however, nearly every tendon of the entire body may be affected...
2018: Vnitr̆ní Lékar̆ství
https://www.readbyqxmd.com/read/29331548/effect-of-outpatient-antibiotics-for-urinary-tract-infections-on-antimicrobial-resistance-among-commensal-enterobacteriaceae-a-multinational-prospective-cohort-study
#18
Andrew J Stewardson, Jascha Vervoort, Niels Adriaenssens, Samuel Coenen, Maciek Godycki-Cwirko, Anna Kowalczyk, Benedikt Huttner, Christine Lammens, Surbhi Malhotra-Kumar, Herman Goossens, Stephan Harbarth
OBJECTIVES: We quantified the impact of antibiotics prescribed in primary care for urinary tract infections (UTIs) on intestinal colonisation by ciprofloxacin-resistant (CIP-RE) and extended-spectrum beta-lactamase-producing Enterobacteriaceae (ESBL-PE), while accounting for household clustering. METHODS: Prospective cohort study from January 2011 to August 2013 at primary care sites in Belgium, Poland and Switzerland. We recruited outpatients requiring antibiotics for suspected UTIs or asymptomatic bacteriuria (exposed patients), outpatients not requiring antibiotics (non-exposed patients), and 1-3 household contacts for each patient...
January 10, 2018: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/29330817/effect-of-levofloxacin-pazufloxacin-enrofloxacin-and-meloxicam-on-the-immunolocalization-of-abcg-2-transporter-protein-in-rabbit-retina
#19
Adil Mehraj Khan, Satyavan Rampal, Naresh Kumar Sood
Adenosine triphosphate-binding cassette (ABC) sub-family G member-2 (ABCG-2) is a transporter protein, implicated for multi-drug efflux from tissues. This study evaluated the effect of fluoroquinolones; levofloxacin, pazufloxacin and enrofloxacin, and non-steroidal anti-inflammatory drug, meloxicam; on the immunolocalization of ABCG-2 transporter protein of rabbit retinas. Thirty-two male rabbits were randomly divided in to eight groups. Control group was gavaged, 2% benzyl alcohol in 5% dextrose since these chemicals are excipients of the drug preparations used in the treatment groups of this study...
January 12, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29329918/trends-in-incidence-of-long-term-care-facility-onset-clostridium-difficile-infections-in-10-us-geographic-locations-during-2011-2015
#20
Alice Y Guh, Yi Mu, James Baggs, Lisa G Winston, Wendy Bamberg, Carol Lyons, Monica M Farley, Lucy E Wilson, Stacy M Holzbauer, Erin C Phipps, Zintars G Beldavs, Marion A Kainer, Maria Karlsson, Dale N Gerding, Ghinwa Dumyati
During 2011-2015, the adjusted long-term-care facility onset Clostridium difficile infection incidence rate in persons aged ≥65 years decreased annually by 17.45% (95% confidence interval, 14.53%-20.43%) across 10 US sites. A concomitant decline in inpatient fluoroquinolone use and the C difficile epidemic strain NAP1/027 among persons aged ≥65 years may have contributed to the decrease in long-term-care facility-onset C difficile infection incidence rate.
January 9, 2018: American Journal of Infection Control
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