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antibiotic selection

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https://www.readbyqxmd.com/read/28453633/role-of-dna-gyrase-and-topoisomerase-iv-mutations-in-fluoroquinolone-resistance-of-capnocytophaga-spp-clinical-isolates-and-laboratory-mutants
#1
Elodie Ehrmann, Anne Jolivet-Gougeon, Martine Bonnaure-Mallet, Thierry Fosse
Objectives: Capnocytophaga spp. are often reported to cause bacteraemia and extra-oral infections and are characterized by their significant contribution to resistance to β-lactam and macrolide-lincosamide-streptogramin antibiotics in the human oral microbiota. The implication of mutations in the quinolone resistance-determining region (QRDR) of DNA gyrase A and B ( gyrA and gyrB ) and topoisomerase IV ( parC and parE ) of fluoroquinolone (FQ)-resistant Capnocytophaga spp., hitherto unknown, was explored in this study...
April 26, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28449183/noninferiority-trial-investigating-the-efficacy-of-a-nonantibiotic-intramammary-therapy-in-the-treatment-of-mild-to-moderate-clinical-mastitis-in-dairy-cows-with-longer-lasting-udder-diseases
#2
M Ziesch, N Wente, Y Zhang, W Zaremba, S Engl, V Krömker
A nonblinded, positively controlled, noninferiority trial was conducted to evaluate the efficacy of an alternative, nonantibiotic therapy with Masti Veyxym(®) to reduce ineffective antibiotic usage in the treatment of nonsevere clinical mastitis (CM) in cows with longer lasting udder diseases. The solely intramammary treatment with Masti Veyxym(®) (three applications, 12 hr apart) and the combined treatment with Masti Veyxym(®) and antibiotics as usual on the farm according to label of the respective product were compared with the reference treatment of solely antibiotic therapy...
April 27, 2017: Journal of Veterinary Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/28446917/shoot-the-message-not-the-messenger-combating-pathogenic-virulence-in-plants-by-inhibiting-quorum-sensing-mediated-signaling-molecules
#3
REVIEW
Ganesh Alagarasan, Kumar S Aswathy
Immunity, virulence, biofilm formation, and survival in the host environment are regulated by the versatile nature of density dependent microbial cell signaling, also called quorum sensing (QS). The QS molecules can associate with host plant tissues and, at times, cause a change in its gene expression at the downstream level through inter-kingdom cross talking. Progress in controlling QS through fungicide/bactericide in pathogenic microscopic organisms has lead to a rise of antibiotic resistance pathogens. Here, we review the application of selective quorum quenching (QQ) endophytes to control phytopathogens that are shared by most, if not all, terrestrial plant species as well as aquatic plants...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28446153/acceleration-and-suppression-of-resistance-development-by-antibiotic-combinations
#4
Shingo Suzuki, Takaaki Horinouchi, Chikara Furusawa
BACKGROUND: The emergence and spread of antibiotic resistance in bacteria is becoming a global public health problem. Combination therapy, i.e., the simultaneous use of multiple antibiotics, is used for long-term treatment to suppress the emergence of resistant strains. However, the effect of the combinatorial use of multiple drugs on the development of resistance remains elusive, especially in a quantitative assessment. RESULTS: To understand the evolutionary dynamics under combination therapy, we performed laboratory evolution of Escherichia coli under simultaneous addition of two-drug combinations...
April 26, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28445264/incremental-cost-of-nosocomial-bacteremia-according-to-the-focus-of-infection-and-antibiotic-sensitivity-of-the-causative-microorganism-in-a-university-hospital
#5
Marta Riu, Pietro Chiarello, Roser Terradas, Maria Sala, Enric Garcia-Alzorriz, Xavier Castells, Santiago Grau, Francesc Cots
To estimate the incremental cost of nosocomial bacteremia according to the causative focus and classified by the antibiotic sensitivity of the microorganism.Patients admitted to Hospital del Mar in Barcelona from 2005 to 2012 were included. We analyzed the total hospital costs of patients with nosocomial bacteremia caused by microorganisms with a high prevalence and, often, with multidrug-resistance. A control group was defined by selecting patients without bacteremia in the same diagnosis-related group.Our hospital has a cost accounting system (full-costing) that uses activity-based criteria to estimate per-patient costs...
April 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28444620/environmental-pollution-with-antimicrobial-agents-from-bulk-drug-manufacturing-industries-in-hyderabad-south-india-is-associated-with-dissemination-of-extended-spectrum-beta-lactamase-and-carbapenemase-producing-pathogens
#6
Christoph Lübbert, Christian Baars, Anil Dayakar, Norman Lippmann, Arne C Rodloff, Martina Kinzig, Fritz Sörgel
PURPOSE: High antibiotic and antifungal concentrations in wastewater from anti-infective drug production may exert selection pressure for multidrug-resistant (MDR) pathogens. We investigated the environmental presence of active pharmaceutical ingredients and their association with MDR Gram-negative bacteria in Hyderabad, South India, a major production area for the global bulk drug market. METHODS: From Nov 19 to 28, 2016, water samples were collected from the direct environment of bulk drug manufacturing facilities, the vicinity of two sewage treatment plants, the Musi River, and habitats in Hyderabad and nearby villages...
April 26, 2017: Infection
https://www.readbyqxmd.com/read/28444567/the-behavior-of-antibiotic-resistance-genes-and-arsenic-influenced-by-biochar-during-different-manure-composting
#7
Erping Cui, Ying Wu, Yanan Jiao, Yiru Zuo, Christopher Rensing, Hong Chen
The effect of two different biochar types, rice straw biochar (RSB) and mushroom biochar (MB), on chicken manure composting was previously examined by monitoring the fate of antibiotic resistance genes (ARGs) and arsenic. The behavior of ARGs and arsenic in other kinds of manure composting with the same biochar types had not been examined. In this study, we added either RSB or MB to pig and duck manure composts to study the behavior of ARGs (tet genes, sul genes, and chloramphenicol resistance genes) and arsenic under the same experimental condition...
April 25, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28444464/effectiveness-of-antibiotic-prophylaxis-in-non-emergency-cholecystectomy-using-data-from-a-population-based-cohort-study
#8
Ravinder S Vohra, James Hodson, Sandro Pasquali, Ewen A Griffiths
BACKGROUND: There is a variation in the administration of antibiotics prophylaxis to reduce the perceived risk of SSI in patients undergoing non-emergency cholecystectomy. The aim of this study was to determine the effectiveness of antibiotic prophylaxis following non-emergency cholecystectomy to prevent 30-day superficial surgical site infections (SSIs) using non-selected, nationally collected, prospective data. METHODS: Data were extracted from the CholeS study, which examined and independently validated the outcomes on consecutive patients following non-emergency cholecystectomy across 166 hospitals in the UK and Ireland...
April 25, 2017: World Journal of Surgery
https://www.readbyqxmd.com/read/28442908/antibacterial-activity-and-cytocompatibility-of-an-implant-coating-consisting-of-tio2-nanotubes-combined-with-a-gl13k-antimicrobial-peptide
#9
Tao Li, Na Wang, Su Chen, Ran Lu, Hongyi Li, Zhenting Zhang
Prevention of implant-associated infections at an early stage of surgery is highly desirable for the long-term efficacy of implants in dentistry and orthopedics. Infection prophylaxis using conventional antibiotics is becoming less effective due to the development of bacteria resistant to multiple antibiotics. An ideal strategy to conquer bacterial infections is the local delivery of antibacterial agents. Therefore, antimicrobial peptide (AMP) eluting coatings on implant surfaces is a promising alternative...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28442139/intraoperative-ultrasound-assisted-approach-for-endoscopic-treatment-of-vesicoureteral-reflux-in-children
#10
Elisa Zambaiti, Maria Sergio, Alessandra Casuccio, Sergio Salerno, Marcello Cimador
PURPOSE: Despite minimal invasiveness and high success rate, guidelines still prescribe voiding Cystourethrogram (VCUG) after endoscopic treatment for vesicoureteral reflux (VUR) in children. The aim of this paper was to analyze whether intraoperative ultrasound (IO-US) could improve surgical accuracy and perioperative counseling, thus potentially decreasing the need for postoperative VCUG. METHODS: We selected children treated for moderate to high grade VUR, renal scarring or repeated infections under antibiotic prophylaxis from January to December 2015...
April 18, 2017: Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/28441120/prevalence-of-trachoma-in-northern-benin-results-from-11-population-based-prevalence-surveys-covering-26-districts
#11
Amadou Alfa Bio, Pelagie M Boko, Yannelle A Dossou, Jean-Jacques Tougoue, Achille Kabore, Ignace Sounouvou, Jean-Eudes Biaou, Lionel Nizigama, Paul Courtright, Anthony W Solomon, Lisa Rotondo, Wilfrid Batcho, Dorothée Kinde-Gazard
AIMS: We sought to evaluate trachoma prevalence in all suspected-endemic areas of Benin. METHODS: We conducted population-based surveys covering 26 districts grouped into 11 evaluation units (EUs), using a two-stage, systematic and random, cluster sampling design powered at EU level. In each EU, 23 villages were systematically selected with population proportional to size; 30 households were selected from each village using compact segment sampling. In selected households, we examined all consenting residents aged one year or above for trichiasis, trachomatous inflammation - follicular (TF), and trachomatous inflammation - intense...
April 25, 2017: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/28440853/antibiotic-strategies-for-eradicating-pseudomonas-aeruginosa-in-people-with-cystic-fibrosis
#12
REVIEW
Simon C Langton Hewer, Alan R Smyth
BACKGROUND: Respiratory tract infection with Pseudomonas aeruginosa occurs in most people with cystic fibrosis. Once chronic infection is established, Pseudomonas aeruginosa is virtually impossible to eradicate and is associated with increased mortality and morbidity. Early infection may be easier to eradicate.This is an update of a Cochrane review first published in 2003, and previously updated in 2006, 2009 and 2014. OBJECTIVES: To determine whether antibiotic treatment of early Pseudomonas aeruginosa infection in children and adults with cystic fibrosis eradicates the organism, delays the onset of chronic infection, and results in clinical improvement...
April 25, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28440743/targeting-underlying-biologic-mechanisms-in-selecting-adjunctive-therapies-to-improve-periodontal-treatment-in-smokers-a-commentary
#13
Maria L Geisinger, Nicolaas C Geurs, Dorothy Ogdon, Michael S Reddy
Despite well-established evidence that cigarette smoking is the largest modifiable risk factor for periodontal disease and has many deleterious health effects, the treatment of periodontal disease in smokers remains a challenge of periodontal therapy. A recent meta-analysis revealed that the adjunctive use of local delivery of antimicrobials, but not systemic antibiotic usage, with nonsurgical periodontal therapy resulted in an improvement in clinical periodontal parameters. Further evaluation of the current literature reveals that host modulation therapy may also result in a clinical benefit in smokers...
April 25, 2017: Journal of Periodontology
https://www.readbyqxmd.com/read/28440622/understanding-carbapenem-translocation-through-occd3-opdp-of-pseudomonas-aeruginosa
#14
Gowrishankar Soundararajan, Satya Prathyusha Bhamidimarri, Mathias Winterhalter
Pseudomonas aeruginosa utilizes a plethora of substrate specific channels for the uptake of small nutrients. OccD3 (OpdP or PA4501) is an OprD like arginine uptake channel of P. aeruginosa whose role has been implicated in carbapenem uptake. To understand the mechanism of selective permeation we reconstituted single OccD3 channels in planar lipid bilayer and characterized the interaction with Imipenem and Meropenem analyzing the ion current fluctuation in presence of substrates. We performed point mutations in the constriction region of OccD3 to understand the binding and translocation of antibiotic in OccD3...
April 25, 2017: ACS Chemical Biology
https://www.readbyqxmd.com/read/28440605/-carbapenem-resistance-in-pseudomonas-aeruginosa-isolated-from-urine-cultures-prevalence-and-risk-factors
#15
J Álvarez-Otero, J L Lamas-Ferreiro, L González-González, I Rodríguez-Conde, M J Fernández-Soneira, A Arca-Blanco, J R Bermúdez-Sanjurjo, J de la Fuente-Aguado
OBJECTIVE: Pseudomonas aeruginosa is a non-fermentative gram-negative bacillus with a great ability to develop resistance to multiple antibiotics, including carbapenems, which is a growing problem worldwide. The aim of this study was to analyse the prevalence of carbapenem-resistant P. aeruginosa (CRPA) in urine cultures and to determine the risk factors associated with the development of carbapanem resistance. METHODS: Positive urine cultures to P. aeruginosa between September 2012 and September 2014 were identified...
April 25, 2017: Revista Española de Quimioterapia: Publicación Oficial de la Sociedad Española de Quimioterapia
https://www.readbyqxmd.com/read/28440509/modulation-of-mmp-2-and-9-secretion-by-cytokines-inducers-and-inhibitors-in-human-melanoma-a-2058-cells
#16
M Waheed Roomi, Tatiana Kalinovsky, Aleksandra Niedzwiecki, Matthias Rath
Melanoma, an extremely aggressive cancer, causes the most skin cancer-related deaths, due to metastasis to other areas of the body, such as lymph nodes, lungs, liver, brain or bone. It is characterized by high levels of matrix metalloproteinase (MMP)-2 and -9 secretions that degrade the extracellular matrix and basement membrane, allowing cancer cells to spread to distal organs. Various cytokines, mitogens, growth factors, inducers and inhibitors control MMP activities. We investigated the roles of these in regulation of MMP-2 and -9 in human melanoma A-2058 cells...
April 24, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28439658/pan-genomic-approaches-in-lactobacillus-reuteri-as-a-porcine-probiotic-investigation-of-host-adaptation-and-antipathogenic-activity
#17
Jun-Yeong Lee, Geon Goo Han, Jaeyun Choi, Gwi-Deuk Jin, Sang-Kee Kang, Byung Jo Chae, Eun Bae Kim, Yun-Jaie Choi
After the introduction of a ban on the use of antibiotic growth promoters (AGPs) for livestock, reuterin-producing Lactobacillus reuteri is getting attention as an alternative to AGPs. In this study, we investigated genetic features of L. reuteri associated with host specificity and antipathogenic effect. We isolated 104 L. reuteri strains from porcine feces, and 16 strains, composed of eight strains exhibiting the higher antipathogenic effect (group HS) and eight strains exhibiting the lower effect (group LS), were selected for genomic comparison...
April 24, 2017: Microbial Ecology
https://www.readbyqxmd.com/read/28439429/the-standards-of-an-ultrasound-examination-of-the-prostate-gland-part-2
#18
REVIEW
Janusz F Tyloch, Andrzej Paweł Wieczorek
The paper discusses the rules of the proper performing of the ultrasound examination of the prostate gland. It has been divided into two parts: the general part and the detailed part. The first part presents the necessary requirements related to the ultrasound equipment needed for performing transabdominal and transrectal examinations of the prostate gland. The second part presents the application of the ultrasound examination in benign prostatic hyperplasia, in cases of prostate inflammation and in prostate cancer...
March 2017: Journal of Ultrasonography
https://www.readbyqxmd.com/read/28439298/multi-drug-resistant-pathogenic-bacteria-in-the-gut-of-young-children-in-bangladesh
#19
Shirajum Monira, Syeda Antara Shabnam, Sk Imran Ali, Abdus Sadique, Fatema-Tuz Johura, Kazi Zillur Rahman, Nur Haque Alam, Haruo Watanabe, Munirul Alam
BACKGROUND: The gut of human harbors diverse commensal microbiota performing an array of beneficial role for the hosts. In the present study, the major commensal gut bacteria isolated by culturing methods from 15 children of moderate income families, aged between 10 and 24 months, were studied for their response to different antibiotics, and the molecular basis of drug resistance. RESULTS: Of 122 bacterial colonies primarily selected from Luria-Bertani agar, bacterial genera confirmed by analytical profile index (API) 20E(®) system included Escherichia as the predominant (52%) organism, followed by Enterobacter (16%), Pseudomonas (12%), Klebsiella (6%), Pantoea (6%), Vibrio (3%), and Citrobacter (3%); while Aeromonas and Raoultella were identified as the infrequently occurring genera...
2017: Gut Pathogens
https://www.readbyqxmd.com/read/28439261/interaction-of-bacterial-membrane-vesicles-with-specific-species-and-their-potential-for-delivery-to-target-cells
#20
Yosuke Tashiro, Yusuke Hasegawa, Masaki Shintani, Kotaro Takaki, Moriya Ohkuma, Kazuhide Kimbara, Hiroyuki Futamata
Membrane vesicles (MVs) are secreted from a wide range of microbial species and transfer their content to other cells. Although MVs play critical roles in bacterial communication, whether MVs selectively interact with bacterial cells in microbial communities is unclear. In this study, we investigated the specificity of the MV-cell interactions and evaluated the potential of MVs to target bacterial cells for delivery. MV association with bacterial cells was examined using a fluorescent membrane dye to label MVs...
2017: Frontiers in Microbiology
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