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https://www.readbyqxmd.com/read/28732396/role-of-dams-in-the-phase-transfer-of-antibiotics-in-an-urban-river-receiving-wastewater-treatment-plant-effluent
#1
Xiaoyu Guo, Chenghong Feng, Jianhong Zhang, Chenhao Tian, Jingling Liu
Dams are universally constructed to change hydrodynamic forces and impound water in urban rivers, but few efforts have been made to expound the impact of dams on the transport of antibiotics in rivers. In this study, the main object and focus was to elucidate the intercept effect of rubber dam and the gate dam on the sediment-water phase redistribution of eight typical antibiotics along an urban river with the water replenished from wastewater treatment plants (WWTPs). The results show that the eight antibiotics were widely detected in the whole river segment, and the WWTPs were found to be the main sources...
July 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28732194/principles-of-chemical-biology-apex-cell-free-enzyme-systems-new-antibiotics-epigenetic-membrane-relationship-and-metastable-transcription
#2
(no author information available yet)
This month: GPCR signaling and networks in APEX, making terpenes via biocatalysis in a cell-free system, antibiotics for Gram-negative bugs, the role of membranes in epigenetics, and the role of metastability in transcription.
July 20, 2017: Cell Chemical Biology
https://www.readbyqxmd.com/read/28732057/structural-basis-of-zn-ii-induced-metal-detoxification-and-antibiotic-resistance-by-histidine-kinase-czcs-in-pseudomonas-aeruginosa
#3
Dan Wang, Weizhong Chen, Shanqing Huang, Yafeng He, Xichun Liu, Qingyuan Hu, Tianbiao Wei, Hong Shang, Jianhua Gan, Hao Chen
Pseudomonas aeruginosa (P. aeruginosa) is a major opportunistic human pathogen, causing serious nosocomial infections among immunocompromised patients by multi-determinant virulence and high antibiotic resistance. The CzcR-CzcS signal transduction system in P. aeruginosa is primarily involved in metal detoxification and antibiotic resistance through co-regulating cross-resistance between Zn(II) and carbapenem antibiotics. Although the intracellular regulatory pathway is well-established, the mechanism by which extracellular sensor domain of histidine kinase (HK) CzcS responds to Zn(II) stimulus to trigger downstream signal transduction remains unclear...
July 21, 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28732048/wolbachia-and-dengue-virus-infection-in-the-mosquito-aedes-fluviatilis-diptera-culicidae
#4
Jéssica Barreto Lopes Silva, Debora Magalhães Alves, Vanessa Bottino-Rojas, Thiago Nunes Pereira, Marcos Henrique Ferreira Sorgine, Eric Pearce Caragata, Luciano Andrade Moreira
Dengue represents a serious threat to human health, with billions of people living at risk of the disease. Wolbachia pipientis is a bacterial endosymbiont common to many insect species. Wolbachia transinfections in mosquito disease vectors have great value for disease control given the bacterium's ability to spread into wild mosquito populations, and to interfere with infections of pathogens, such as dengue virus. Aedes fluviatilis is a mosquito with a widespread distribution in Latin America, but its status as a dengue vector has not been clarified...
2017: PloS One
https://www.readbyqxmd.com/read/28732023/correction-a-chemical-genomic-screen-of-neglected-antibiotics-reveals-illicit-transport-of-kasugamycin-and-blasticidin-s
#5
Anthony L Shiver, Hendrik Osadnik, George Kritikos, Bo Li, Nevan Krogan, Athanasios Typas, Carol A Gross
[This corrects the article DOI: 10.1371/journal.pgen.1006124.].
July 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28731901/should-first-line-empiric-treatment-strategies-for-neonates-cover-coagulase-negative-staphylococcal-infections-in-kenya
#6
Anna C Seale, Christina W Obiero, Kelsey Jones, Hellen C Barsosio, Johnstone Thitiri, Moses Ngari, Susan Morpeth, Shebe Mohammed, Greg Fegan, Neema Mturi, James A Berkley
BACKGROUND: Neonatal mortality remains high in sub-Saharan Africa, and a third of deaths are estimated to result from infection. Whilst coagulase negative staphylococci (CoNS) are leading neonatal pathogens in resource-rich settings, their role, and the need for early anti-staphylococcal treatment in empiric antibiotic guidelines, is unknown in sub-Saharan Africa. METHODS: We examined systematic clinical and microbiologic surveillance data from all neonatal admissions to Kilifi County Hospital (1998-2013) to determine associated case fatality and/or prolonged duration of admission associated with CoNS in neonates treated according to standard WHO guidelines...
July 18, 2017: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/28731836/mortality-rate-and-antibiotic-resistance-in-complicated-diverticulitis-report-of-272-consecutive-patients-worldwide-a-prospective-cohort-study
#7
Federico Coccolini, Mattia Trevisan, Giulia Montori, Massimo Sartelli, Fausto Catena, Marco Ceresoli, Antonio Costanzo, Arianna Heyer, Luca Ansaloni
BACKGROUND: Complicated diverticulitis (CD) is a common problem for surgeons. In treating it, as a general principle, every verified source of infection should be controlled. Supplementary antimicrobial management involves a delicate balance of optimizing empirical therapy while reducing unnecessary antibiotic use. The necessity to know the most frequent infecting pathogens and their spectra of resistance is becoming pivotal. The aim of this study was to determine the microbiologic profile of complicated intra-abdominal infections (IAIs) secondary to CD, to analyze the role of empirical antimicrobial therapy, and to describe the clinical aspects of CD worldwide...
July 21, 2017: Surgical Infections
https://www.readbyqxmd.com/read/28731725/skin-and-soft-tissue-infections-active-component-u-s-armed-forces-2013-2016
#8
Shauna Stahlman, Valerie F Williams, Gi-Taik Oh, Eugene V Millar, Jason W Bennett
During the 4-year surveillance period, there were 282,571 incident cases of skin and soft tissue infection (SSTI) among active component U.S. military members diagnosed in inpatient or outpatient settings, corresponding to an overall incidence of 558.2 per 10,000 person-years (p-yrs). An additional 10,904 cases occurred in theater of operations (460.0 per 10,000 p-yrs). Approximately half (49.4%) were classified as "other SSTI" (e.g., folliculitis, impetigo); 45.9% were cellulitis/abscess; 4.6% were carbuncles/furuncles; and 0...
July 2017: MSMR
https://www.readbyqxmd.com/read/28731688/the-%C3%AF-configuration-of-the-www-motif-of-a-short-trp-rich-peptide-is-critical-for-targeting-bacterial-membranes-disrupting-preformed-biofilms-and-killing-methicillin-resistant-staphylococcus-aureus
#9
D Zarena, Biswajit Mishra, Tamara Lushnikova, Fangyu Wang, Guangshun Wang
Tryptophan-rich peptides, being short and suitable for large-scale chemical synthesis, are attractive candidates for developing a new generation of antimicrobials to combat antibiotic-resistant bacteria (superbugs). Although there are numerous pictures for membrane-bound structure of a single tryptophan (W), how multiple Trp amino acids assemble themselves and interact with bacterial membranes are poorly understood. This communication presents the three-dimensional structure for an eight-residue Trp-rich peptide (WWWLRKIW-NH2 with 50% W) determined by the improved 2D NMR method, which includes the measurements of 13C and 15N chemical shifts at natural abundance...
July 21, 2017: Biochemistry
https://www.readbyqxmd.com/read/28731671/-langerhans-cell-histiocytosis-presenting-as-isolated-adenitis-in-an-infant-case-report
#10
María Soriano-Ramos, Enrique Salcedo Lobato, María Baro Fernández, Daniel Blázquez-Gamero
Langerhans cell histiocytosis in infants is a rare condition, and presentation as an isolated cervical adenitis is exceptional at this age. We describe the case of a 3-month-old female infant presenting with a neck mass in the right mandibular angle with poor response to antibiotic treatment. Fine needle aspiration was performed and confirmed the diagnosis of Langerhans cell histiocytosis with complementary tests showing no features of systemic involvement. Langerhans cell histiocytosis should be considered in the differential diagnosis of subacute neck masses with poor outcome in infants and physicians should consider performing a fine needle aspiration to establish the diagnosis...
August 1, 2017: Archivos Argentinos de Pediatría
https://www.readbyqxmd.com/read/28731668/-azathioprine-induced-pancytopenia-case-series
#11
Cristina Martínez Faci, Ignacio Ros Arnal, José M Martínez de Zabarte Fernández, Jordi Sorribes Estorch, Mónica López Campos, Carmen Rodríguez-Vigil Iturrate
Azathioprine is an immunosuppressive drug that has shown effectiveness in inflammatory bowel disease treatment. Its metabolite, 6-mercaptopurine, is metabolized through thiopurine methyltransferase. Patients with low enzyme activity may have more frequent and severe side effects. The most common is leukopenia, and rarely pancytopenia. The thiopurine methyltransferase activity monitoring shows an individualized profile of enzymatic activity but it should not replace monitoring by performing serial blood counts...
August 1, 2017: Archivos Argentinos de Pediatría
https://www.readbyqxmd.com/read/28731664/-severe-infection-by-methicillin-sensitive-staphylococcus-aureus-producing-panton-valentine-leukocidin-reports-of-two-cases
#12
Martín Brizuela, Guadalupe Pérez, Silvina Ruvinsky, Claudia Sarkis, Romina Romero, Alejandra Mastroianni, Lidia Casimir, María E Venuta, Verónica Gómez Bonduele, Rosa Bologna
Staphylococcus aureus is a major etiologic agent of infections in children from the community and the hospital setting. The severity of these conditions is associated with virulence factors, including the Panton-Valentine leukocidin. Both methicillin resistant and sensitive Staphylococcus aureus produce this leukocidin although with varying frequency. We present two children with severe infection by sensitive Staphylococcus aureus producer of Panton-Valentine leukocidin with musculoskeletal and endovascular complications...
August 1, 2017: Archivos Argentinos de Pediatría
https://www.readbyqxmd.com/read/28731663/-pulmonary-actinomycosis-and-tuberculosis-a-comorbidity-pediatric-case
#13
Elsa D Bisero, Graciela F Luque, Cristina N Rizzo, Alejandra E Zapata, María S Cuello
Actinomycosis is a chronic suppurative infection, produced by anaerobic Gram-positive bacteria or microaerobic Actinomyces species. It is rare in children and adolescents and it is more common in immunocompromised. Mycobacterium tuberculosis collaborates on the development of the disease. Pulmonary involvement appears as a picture of chronic condensation that does not improve with conventional antibiotic treatment. Classic complications affecting the thoracic wallwith drainage in «sulfur granule» and fistulization are described less frequently nowadays...
August 1, 2017: Archivos Argentinos de Pediatría
https://www.readbyqxmd.com/read/28731529/association-between-systemic-antibiotic-and-corticosteroid-use-for-chronic-rhinosinusitis-and-quality-of-life
#14
Alisa Yamasaki, Lloyd P Hoehle, Katie M Phillips, Allen L Feng, Adam P Campbell, David S Caradonna, Stacey T Gray, Ahmad R Sedaghat
OBJECTIVE: We sought to establish the significance of querying chronic rhinosinusitis (CRS) patients about their past CRS-related oral antibiotic and corticosteroid usage by determining the association between these metrics and patients' quality of life (QoL). STUDY DESIGN: Cross-sectional study. METHODS: A total of 157 patients with CRS were prospectively recruited. CRS-specific QoL was measured using the 22-item Sinonasal Outcome Test (SNOT-22)...
July 21, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28731325/bioinspired-and-biomimetic-agnps-gentamicin-embedded-silk-fibroin-coatings-for-robust-antibacterial-and-osteogenetic-applications
#15
Wenhao Zhou, Zhaojun Jia, Pan Xiong, Jianglong Yan, Yangyang Li, Ming Li, Yan Cheng, Yufeng Zheng
With the progressively increasing demand for orthopedic Ti implants, the balance realization between two primary complications restricting implants applications is imperative needed to be solved that the lack of bone tissue integration and biomedical device-associated infections (BAI), where emergence of multi-resistance bacteria make it worse. Notably, a combination of silver nanoparticles (AgNPs) and a kind of antibiotic can synergistically inhibit bacterial growth, where low concentration of AgNPs has been confirmed to promote the proliferation and osteogenesis of osteoblasts...
July 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28731324/using-infrared-spectroscopy-and-multivariate-analysis-to-detect-antibiotics-resistant-escherichia-coli-bacteria
#16
Uraib Sharaha, Eladio Rodriguez-Diaz, Klaris Riesenberg, Irving J Bigio, Mahmoud Huleihel, Ahmad Salman
Bacterial pathogens are one of the primary causes of human morbidity worldwide. Historically, antibiotics have been highly effective against most bacterial pathogens; however, the increasing resistance of bacteria to a broad spectrum of commonly used antibiotics has become a global health-care problem. Early and rapid determination of bacterial susceptibility to antibiotics has become essential in many clinical settings, and, sometimes, can save lives. Currently classical procedures require at least 48 hours for determining bacterial susceptibility, which can constitute a life-threatening delay for effective treatment...
July 21, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28731269/biofilm-formation-and-antibiotic-resistance-in-klebsiella-pneumoniae-urinary-strains
#17
Claudia Vuotto, Francesca Longo, Chiara Pascolini, Gianfranco Donelli, Maria Pia Balice, Maria Francesca Libori, Valentina Tiracchia, Antonino Salvia, Pietro Emanuele Varaldo
AIMS: Multi-drug resistant Klebsiella pneumoniae has become a relevant healthcare-associated pathogen. Capsule, type 1 and 3 fimbriae (mrkA gene), type 2 quorum-sensing system (luxS), synthesis of D-galactan I (wbbM), LPS transport (wzm) and poly-beta-1,6-N-acetyl-D-glucosamine (pgaA) seem involved in K. pneumoniae biofilm. Non-enzymatic antibiotic resistance is related to non-expression or mutation of porins (OmpK35 and OmpK36), and efflux pump (acrB) over-expression. The aim of this study was to analyse some virulence factors of K...
July 21, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28730922/investigating-the-ways-in-which-health-information-technology-can-promote-antimicrobial-stewardship-a-conceptual-overview
#18
Abby King, Kathrin M Cresswell, Jamie J Coleman, Sarah K Pontefract, Ann Slee, Robin Williams, Aziz Sheikh
Antimicrobial resistance is now recognised as a threat to health worldwide. Antimicrobial stewardship aims to promote the responsible use of antibiotics and is high on international and national policy agendas. Health information technology has the potential to support antimicrobial stewardship in a number of ways, but this field is still poorly characterised and understood. Building on a recent systematic review and expert roundtable discussions, we take a lifecycle perspective of antibiotic use in hospitals and identify potential targets for health information technology-based interventions to support antimicrobial stewardship...
January 1, 2017: Journal of the Royal Society of Medicine
https://www.readbyqxmd.com/read/28730858/management-of-children-with-persistent-group-a-streptococcal-carriage
#19
Maria E Zacharioudaki, Emmanouil Galanakis
Chronic GAS carrier state is best defined as the prolonged presence of group A β-haemolytic Streptococcus (GAS) in the pharynx without evidence of infection or inflammation. Chronic GAS carriers have a low risk of immune mediated complications. Persistent pharyngeal carriage often raises management issues. In this study, we review the evidence on the management of persistent GAS carriage in children and propose a management algorithm. Areas covered: Chronic GAS pharyngeal carriage is quite common affecting 10-20% of school-aged children...
July 21, 2017: Expert Review of Anti-infective Therapy
https://www.readbyqxmd.com/read/28730802/sensing-single-molecule-penetration-into-nanopores-pushing-the-time-resolution-to-the-diffusion-limit
#20
Igor Bodrenko, Jiajun Wang, Samuele Salis, Mathias Winterhalter, Matteo Ceccarelli
To quantify small molecule penetration into and eventually permeation through nanopores, we applied an improved excess-noise analysis of the ion current fluctuation caused by entering molecules. The kinetic parameters of substrate entry and leave are derived from a two-state Markov model, analyzing the substrate concentration depen- dence of the average ion current and its variance. Including filter corrections allows one to detect the transition rates beyond the cutoff frequency, fc, of the instrumental ion-current filter...
July 21, 2017: ACS Sensors
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