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Optimizing antibiotic

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https://www.readbyqxmd.com/read/29150925/one-pot-synthesis-of-a-multi-template-molecularly-imprinted-polymer-for-the-extraction-of-six-sulfonamide-residues-from-milk-before-hplc-with-diode-array-detection
#1
Maria Kechagia, Victoria Samanidou, Abuzar Kabir, Kenneth G Furton
A highly selective molecularly imprinted polymer sorbent was synthesized and employed for the simultaneous determination of six sulfonamide antibiotic residues (sulfanilamide, sulfacetamide, sulfadiazine, sulfathiazole, sulfamerazine and sulfamethizole) in milk samples. Multi-analyte imprinted particles were used as sorbent in solid phase extraction. Sulfonamides were separated on a high-performance liquid chromatography column (Merck-Lichrospher RP18e, 5 μm 250 × 4 mm) and further identified and quantified by diode array detection...
November 18, 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/29150510/characterization-of-vibrio-parahaemolyticus-and-vibrio-vulnificus-recovered-from-oysters-during-an-oyster-relay-study
#2
Sara Elmahdi, Salina Parveen, Sylvia Ossai, Ligia V DaSilva, Michael Jahncke, John Bowers, John Jacobs
Vibrio parahaemolyticus (Vp) and Vibrio vulnificus (Vv) are naturally occurring estuarine bacteria and are the leading causes of seafood-associated infections and mortality in the USA. Though multiple-antibiotic resistant Vp and Vv have been reported resistance patterns in vibrios are not as well documented as other food-borne bacterial pathogens. Salinity relaying (SR) is a Post-Harvest Processing (PHP) treatment to reduce the abundance of these pathogens in shellfish harvested during the warmer months. The purpose of this study was to evaluate the antimicrobial susceptibility (AMS), pathogenicity and genetic profiles of Vp and Vv recovered from oysters during an oyster relay study...
November 17, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29149989/low-background-and-visual-detection-of-antibiotic-based-on-target-activated-colorimetric-split-peroxidase-dnazyme-coupled-with-dual-nicking-enzyme-signal-amplification
#3
REVIEW
Xuejun Cui, Rongguo Li, Xiaofei Liu, Jingfeng Wang, Xueqi Leng, Xiaolei Song, Qianqian Pei, Yu Wang, Su Liu, Jiadong Huang
Herein, we have reported the development of a simple, rapid, and low cost colorimetric method for the detection of antibiotic based on target-activated split peroxidase DNAzyme coupled with dual nicking enzyme signal amplification (NESA). To lower background signal in G-quadruplex DNAzyme-based detection, the two split G-rich parts are caged into two different hairpin probes, respectively, preventing the two parts from assembling into the G-quadruplex structure. By the combination of restriction endonuclease-assisted cleavage reaction with the spilt G-quadruplex probes, target-modulated release of the two split G-rich parts is achieved, affording high specificity of antibiotic detection...
January 2, 2018: Analytica Chimica Acta
https://www.readbyqxmd.com/read/29149875/prevalence-of-antibiotic-prescription-in-pediatric-outpatients-in-italy-the-role-of-local-health-districts-and-primary-care-physicians-in-determining-variation-a-multilevel-design-for-healthcare-decision-support
#4
Mirko Di Martino, Adele Lallo, Ursula Kirchmayer, Marina Davoli, Danilo Fusco
BACKGROUND: According to scientific literature, antibacterials are prescribed for common pediatric conditions that do not benefit from antibiotic therapy. The link between antibiotic use and bacterial resistance is well known. Antibiotic overprescribing generates high social costs and severe consequences for children. Our objectives were to analyze antibiotic prescription patterns in pediatric outpatients residing in the Lazio region (Italy), to identify physicians' characteristics associated with increased propensity for prescription, to identify the priority axes for action to improve the rational use of antibiotics...
November 17, 2017: BMC Public Health
https://www.readbyqxmd.com/read/29146549/risk-assessment-of-infected-children-with-pseudomonas-aeruginosa-pneumonia-by-combining-host-and-pathogen-predictors
#5
Jiayi Chen, Yuhang Chen, Pengwei Hu, Tao Zhou, Xin Xu, Xiaofang Pei
The current criteria of pneumonia severity, which mainly depend on clinical manifestations and laboratory findings from blood routine tests and X-ray examination, are still of great significance in preliminary diagnosis. However, the utility of traditional severe pneumonia indexes (SPI) without considering high virulence and multidrug resistance of Pseudomonas aeruginosa has limitations. Thus, it is of great value to make a risk assessment, which can serve as a complementary option for incomplete clinical diagnosis...
November 13, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/29144724/structure-based-analysis-of-boronic-acids-as-inhibitors-of-acinetobacter-derived-cephalosporinase-7-adc-7-a-unique-class-c-%C3%AE-lactamase
#6
Alexandra A Bouza, Hollister C Swanson, Kali A Smolen, Alison L VanDine, Magdalena A Taracila, Chiara Romagnoli, Emilia Caselli, Fabio Prati, Robert A Bonomo, Rachel A Powers, Bradley J Wallar
Acinetobacter baumannii is a multidrug resistant pathogen that infects more than 12,000 patients each year in the US. Much of the resistance to β-lactam antibiotics in Acinetobacter spp. is a result of class C β-lactamases known as Acinetobacter-derived cephalosporinases (ADCs). ADCs are unaffected by clinically used -lactam-based β-lactamase inhibitors. In this study, five boronic acid transition state analog inhibitors (BATSIs) were evaluated for inhibition of the class C cephalosporinase ADC-7. Our goal was to explore the properties of BATSIs designed to probe the R1 binding site...
November 16, 2017: ACS Infectious Diseases
https://www.readbyqxmd.com/read/29144559/treatment-of-helicobacter-pylori-infection-a-clinical-practice-update
#7
REVIEW
Rocco Maurizio Zagari, Stefano Rabitti, Leonardo Henry Eusebi, Franco Bazzoli
BACKGROUND: Helicobacter pylori infection is still frequent in the community and all infected subjects should be offered an eradication therapy. Nowdays physicians have to face the challenge of antibiotic resistance in treating Helicobacter pylori infected individuals. AIM: This review provides an overview of current international guidelines and reports recent evidence from systematic reviews and clinical trials on the treatment of Helicobacter pylori infection, and should help physicians to better treat their patients...
November 16, 2017: European Journal of Clinical Investigation
https://www.readbyqxmd.com/read/29143479/encapsulation-of-rifampin-in-a-polymeric-layer-by-layer-structure-for-drug-delivery
#8
Akbar Esmaeili, Meissam Khodaei
Rifampin (RIF) is a bactericidal antibiotic drug and potent inducer of hepatic and intestinal cytochrome P-450 (CYP-450) enzyme systems. Given by mouth or intravenously, it can cause numerous clinical drug interactions; thus, alternative systems of drug delivery that bypass some or all of its toxic effects are well worth investigating. In this study, a controlled layer-by-layer (LBL) process of encapsulating RIF in biocompatible alginate and chitosan polymers loaded onto Fe3 O4 nanoparticles was developed. Fe3 O4 nanoparticles were synthesized from FeCl3 ·6H2 O using a hydrothermal procedure...
November 16, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/29141102/statistically-optimized-ceftriaxone-sodium-biotransformation-through-achromobacter-xylosoxidans-strain-cef6-an-unusual-insight-for-bioremediation
#9
Ahmed Anan, Khaled M Ghanem, Amira M Embaby, Ahmed Hussein, Moustafa Y El-Naggar
The present study underlines a unique promising approach toward efficient biotransformation of ceftriaxone sodium (Ceftx), a highly frequent prescribed cephalosporin antibiotic, by a newly bacterium namely Achromobacter xylosoxidans strain Cef6 isolated from Ceftx contaminated raw materials in pharmaceutical industries. A three step sequential statistical-mathematical approach (Plackett-Burman design [PBD], Central Composite Design [CCD], and ridge-canonical analyses) was anticipated to optimize the biotransformation process...
November 15, 2017: Journal of Basic Microbiology
https://www.readbyqxmd.com/read/29138482/valgamicin-c-a-novel-cyclic-depsipeptide-containing-the-unusual-amino-acid-cleonine-and-related-valgamicins-a-t-and-v-produced-by-amycolatopsis-sp-ml1-hf4
#10
Hideki Hashizume, Kiyoko Iijima, Kazuma Yamashita, Tomoyuki Kimura, Shun-Ichi Wada, Ryuichi Sawa, Masayuki Igarashi
In the course of optimizing pargamicin A production in Amycolatopsis sp. ML1-hF4, we discovered novel cyclic depsipeptide compounds in the broth and designated them valgamicins A, C, T and V. The structures of these molecules were determined by spectroscopic studies, advanced Marfey's method and X-ray crystal structural analysis. Valgamicin C contains the extremely rare amino acid cleonine. To our knowledge, this is the first report of a cleonine-containing metabolite from a naturally isolated microorganism without any breeding or mutation treatment...
November 15, 2017: Journal of Antibiotics
https://www.readbyqxmd.com/read/29135306/a-calculation-tool-and-process-to-pre-position-pharmaceuticals-for-anthrax-post-exposure-prophylaxis
#11
Gary D Peksa, Michael J Robbins, Alexis R Beyer, Elisabeth K Weber, Keneatha Johnson
Anthrax, caused by Bacillus anthracis, is considered a severe bioterrorism threat because of its high mortality rate. The Chicago Healthcare System Coalition for Preparedness and Response (CHSCPR) aims to pre-position antibiotic medical countermeasures (MCMs) at healthcare facilities in order to provide on-site anthrax post-exposure prophylaxis. Pharmacists proposed moving toward a new process that involved the development of a standardized calculation methodology for acquiring supply drugs. This was an interventional quality improvement project aimed at optimizing inventory, acquisition, and distribution of antibiotic MCMs for anthrax post-exposure prophylaxis at Chicago hospitals for hospital personnel, associated first responders, and their families...
November 14, 2017: Health Security
https://www.readbyqxmd.com/read/29133472/rheumatic-heart-disease-treatment-cascade-in-uganda
#12
Chris T Longenecker, Stephen R Morris, Twalib O Aliku, Andrea Beaton, Marco A Costa, Moses R Kamya, Cissy Kityo, Peter Lwabi, Grace Mirembe, Dorah Nampijja, Joselyn Rwebembera, Craig Sable, Robert A Salata, Amy Scheel, Daniel I Simon, Isaac Ssinabulya, Emmy Okello
BACKGROUND: Rheumatic heart disease (RHD) is a leading cause of premature death and disability in low-income countries; however, few receive optimal benzathine penicillin G (BPG) therapy to prevent disease progression. We aimed to comprehensively describe the treatment cascade for RHD in Uganda to identify appropriate targets for intervention. METHODS AND RESULTS: Using data from the Uganda RHD Registry (n=1504), we identified the proportion of patients in the following care categories: (1) diagnosed and alive as of June 1, 2016; (2) retained in care; (3) appropriately prescribed BPG; and (4) optimally adherent to BPG (>80% of prescribed doses)...
November 2017: Circulation. Cardiovascular Quality and Outcomes
https://www.readbyqxmd.com/read/29129498/a-novel-double-layer-mucoadhesive-tablet-containing-probiotic-strain-for-vaginal-administration-design-development-and-technological-evaluation
#13
María Teresa Sánchez, María Adolfina Ruiz, Herminia Castán, María Encarnación Morales
Vulvovaginal candidosis caused by Candida spp. is the most prevalent vaginal infection in Europe and the second one in EE.UU, so it has become a major female concern. Probiotics bacteria have been proposed as an alternative treatment with the aim of avoiding the adverse effects associated with conventional therapies including antibiotics and other aggressive drugs for the vaginal mucosa and microbiota. The purpose of this work was to design and develop a novel vaginal tablet that contained Lactobacillus spp...
November 10, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29129472/effectiveness-of-intrapartum-antibiotic-prophylaxis-for-early-onset-group-b-streptococcal-infection-an-integrative-review
#14
REVIEW
Kathryn Braye, John Ferguson, Deborah Davis, Christine Catling, Amy Monk, Maralyn Foureur
BACKGROUND: In some countries, up to 30% of women are exposed to intrapartum antibiotic prophylaxis for prevention of early-onset group B Streptococcal infection. Intrapartum antibiotic prophylaxis aims to reduce the risk of neonatal morbidity and mortality from this infection. The intervention may adversely affect non-pathogenic bacteria which are passed to the newborn during birth and are considered important in optimising health. Since many women are offered intrapartum antibiotic prophylaxis, effectiveness and implications of this intervention need to be established...
November 9, 2017: Women and Birth: Journal of the Australian College of Midwives
https://www.readbyqxmd.com/read/29127799/persistence-of-antibiotic-resistance-genes-and-bacterial-community-changes-in-drinking-water-treatment-system-from-drinking-water-source-to-tap-water
#15
Hao-Chang Su, You-Sheng Liu, Chang-Gui Pan, Jun Chen, Liang-Ying He, Guang-Guo Ying
As emerging contaminants, antibiotic resistance genes (ARGs) have become a public concern. This study aimed to investigate the occurrence and diversity of ARGs, and variation in the composition of bacterial communities in source water, drinking water treatment plants, and tap water in the Pearl River Delta region, South China. Various ARGs were present in the different types of water. Among the 27 target ARGs, floR and sul1 dominated in source water from three large rivers in the region. Pearson correlation analysis suggested that sul1, sul2, floR, and cmlA could be potential indicators for ARGs in water samples...
November 8, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29127501/characterization-of-a-novel-yeast-species-metschnikowia-persimmonesis-kctc-12991bp-kiom-g15050-type-strain-isolated-from-a-medicinal-plant-korean-persimmon-calyx-diospyros-kaki-thumb
#16
Young Min Kang, Ji Eun Choi, Richard Komakech, Jeong Hwan Park, Dae Wook Kim, Kye Man Cho, Seung Mi Kang, Sang Haeng Choi, Kun Chul Song, Chung Min Ryu, Keun Chul Lee, Jung-Sook Lee
The yeast strain Metschnikowia persimmonesis Kang and Choi et al., sp. nov. [type strain KIOM_G15050 = Korean Collection for Type Cultures (KCTC) 12991BP] was isolated from the stalk of native persimmon cultivars (Diospyros kaki Thumb) obtained from different regions of South Korea and was characterized phenotypically, genetically, and physiologically. The isolate grew between 4 and 40 °C (optimum temperature: 24-28 °C), pH 3-8 (pH optimum = 6.0), and in 0-4% NaCl solution (with optimal growth in absence of NaCl)...
November 10, 2017: AMB Express
https://www.readbyqxmd.com/read/29125405/cutibacterium-formerly-propionibacterium-acnes-infections-associated-with-implantable-devices
#17
Amal A Gharamti, Zeina A Kanafani
Cutibacterium acnes (C. acnes), a Gram-positive biofilm-forming rod implicated in acne vulgaris, is increasingly recognized for its role in implant-associated infections. The diagnosis of C. acnes implant-associated infections remains challenging. The optimal treatment is a combination of both surgical intervention and antibiotic therapy. Areas Covered: In this review, we discuss the different types of implant-associated infections caused by C. acnes. We also highlight the clinical manifestations pertaining to the various sites of infection, and identify several risk factors previously reported in the literature...
November 10, 2017: Expert Review of Anti-infective Therapy
https://www.readbyqxmd.com/read/29124056/microbial-therapeutics-designed-for-infant-health
#18
REVIEW
Claire Watkins, Catherine Stanton, C Anthony Ryan, R Paul Ross
Acknowledgment of the gut microbiome as a vital asset to health has led to multiple studies attempting to elucidate its mechanisms of action. During the first year of life, many factors can cause fluctuation in the developing gut microbiome. Host genetics, maternal health status, mode of delivery, gestational age, feeding regime, and perinatal antibiotic usage, are known factors which can influence the development of the infant gut microbiome. Thus, the microbiome of vaginally born, exclusively breastfed infants at term, with no previous exposure to antibiotics, either directly or indirectly from the mother, is to be considered the "gold standard...
2017: Frontiers in Nutrition
https://www.readbyqxmd.com/read/29123385/clostridium-difficile-infection-in-the-elderly-an-update-on-management
#19
REVIEW
Tomefa E Asempa, David P Nicolau
The burden of Clostridium difficile infection (CDI) is profound and growing. CDI now represents a common cause of health care-associated diarrhea, and is associated with significant morbidity, mortality, and health care costs. CDI disproportionally affects the elderly, possibly explained by the following risk factors: age-related impairment of the immune system, increasing antibiotic utilization, and frequent health care exposure. In the USA, recent epidemiological studies estimate that two out of every three health care-associated CDIs occur in patients 65 years or older...
2017: Clinical Interventions in Aging
https://www.readbyqxmd.com/read/29122393/how-do-professional-relationships-influence-surgical-antibiotic-prophylaxis-decision-making-a-qualitative-study
#20
Jennifer K Broom, Alex F Broom, Emma R Kirby, Jeffrey J Post
BACKGROUND: Surgical antibiotic prophylaxis (SAP) is a critical area to optimize to reduce the escalation of antimicrobial resistance. This article explores the ways by which interpersonal relationships influence SAP decision making. METHODS: Twenty surgeons and anesthetists participated in in-depth semistructured interviews on SAP prescribing. Results were analyzed using the framework approach. RESULTS: Analysis revealed 3 ways by which interpersonal relationships influence SAP: relationship dynamics between the surgeon and the anesthetist determine appropriateness of SAP, particularly operative risk ownership; perceived hierarchies within, and between, surgical and anesthetist specialties influence antibiotic prescribing decisions; and surgical distance from the antimicrobial stewardship team, which influences use of antimicrobial stewardship principles...
November 7, 2017: American Journal of Infection Control
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