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https://www.readbyqxmd.com/read/28229030/retroperitoneal-necrotizing-fasciitis-masquerading-as-perianal-abscess-rare-and-perilous
#1
Anandhi Amaranathan, Ashok Kumar Sahoo, Deepak Barathi, Gomathi Shankar, Sarath Chandra Sistla
Necrotizing fasciitis is one of the uncommon presentations of a rapidly spreading subcutaneous tissue infection. Although the actual cause is unclear in many cases, most of them are due to the rapid proliferation of microorganisms. Retroperitoneal necrotizing fasciitis is extremely rare. It is a potentially lethal infection that requires immediate and aggressive surgical care. Early diagnosis is the key to a better prognosis. The possibility of retroperitoneal necrotizing fasciitis should be suspected in patients with symptoms of sepsis that are disproportionate to clinical findings...
January 17, 2017: Curēus
https://www.readbyqxmd.com/read/28229018/-genomic-data-mining-of-the-marine-actinobacteria-streptomyces-sp-h-kf8-unveils-insights-into-multi-stress-related-genes-and-metabolic-pathways-involved-in-antimicrobial-synthesis
#2
Agustina Undabarrena, Juan A Ugalde, Michael Seeger, Beatriz Cámara
Streptomyces sp. H-KF8 is an actinobacterial strain isolated from marine sediments of a Chilean Patagonian fjord. Morphological characterization together with antibacterial activity was assessed in various culture media, revealing a carbon-source dependent activity mainly against Gram-positive bacteria (S. aureus and L. monocytogenes). Genome mining of this antibacterial-producing bacterium revealed the presence of 26 biosynthetic gene clusters (BGCs) for secondary metabolites, where among them, 81% have low similarities with known BGCs...
2017: PeerJ
https://www.readbyqxmd.com/read/28228071/a-rat-model-of-ischemic-enteritis-pathogenic-importance-of-enterobacteria-inos-no-and-cox-2-pge2
#3
Koji Takeuchi, Yoshino Komatsu, Yuka Nakamori, Tohru Kotani
BACKGROUND: We introduced a rat model of ischemic enteritis and investigated the roles of enterobacteria, nitric oxide (NO), and prostaglandins (PGs) in its pathogenesis. METHODS: Male rats were used after 18 h of fasting. Ischemic enteritis was induced by partial ligation of the superior mesenteric artery (SMA). Under ether anesthesia, SMA was isolated, and a stenosis was made by placing a needle (23 guage) on the vessel and ligating both the vessel and needle, and then a needle was removed from the ligature...
February 20, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28224246/comparison-of-veterinary-drug-residue-results-in-animal-tissues-by-ultrahigh-performance-liquid-chromatography-coupled-to-triple-quadrupole-or-quadrupole-time-of-flight-tandem-mass-spectrometry-after-different-sample-preparation-methods-including-use-of-a-commercial
#4
Tarun Anumol, Steven J Lehotay, Joan Stevens, Jerry Zweigenbaum
Veterinary drug residues in animal-derived foods must be monitored to ensure food safety, verify proper veterinary practices, enforce legal limits in domestic and imported foods, and for other purposes. A common goal in drug residue analysis in foods is to achieve acceptable monitoring results for as many analytes as possible, with higher priority given to the drugs of most concern, in an efficient and robust manner. The U.S. Department of Agriculture has implemented a multiclass, multi-residue method based on sample preparation using dispersive solid phase extraction (d-SPE) for cleanup and ultrahigh-performance liquid chromatography-tandem quadrupole mass spectrometry (UHPLC-QQQ) for analysis of >120 drugs at regulatory levels of concern in animal tissues...
February 21, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28218515/chlorinated-glycopeptide-antibiotic-peptide-precursors-improve-cytochrome-p450-catalyzed-cyclization-cascade-efficiency
#5
Madeleine Peschke, Clara Brieke, Rob Goode, Ralf Schittenhelm, Max J Cryle
The activity of glycopeptide antibiotics depends upon important structural modifications to their precursor heptapeptide backbone: specifically, the Cytochrome P450-catalyzed oxidative crosslinking of aromatic side chains as well as the halogenation of specific residues within the peptide. The timing of halogenation and its effect on the cyclization of the peptide is currently unclear. Our results show that chlorination of peptide precursors improves their processing by P450 enzymes in vitro, which provides support for GPA halogenation occurring prior to peptide cyclization during non-ribosomal peptide synthesis...
February 20, 2017: Biochemistry
https://www.readbyqxmd.com/read/28213548/effects-of-gelling-agent-and-extracellular-signaling-molecules-on-the-culturability-of-marine-bacteria
#6
Anita Mac Rygaard, Mariane Schmidt Thøgersen, Kristian Fog Nielsen, Lone Gram, Mikkel Bentzon-Tilia
Only 1 % of marine bacteria are currently culturable using standard laboratory procedures and this is a major obstacle for our understanding of the biology of marine microorganisms and for the discovery of novel microbial natural products. Therefore, the purpose of the present study was to investigate if improved cultivation conditions, including the use of an alternative gelling agent, and supplementation with signaling molecules, could improve the culturability of bacteria from seawater. Substituting agar with gellan gum improved viable counts 3 - 40-fold, depending on medium composition and incubation conditions, with a maximum of 6...
February 17, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28211044/antibiotic-use-as-a-marker-of-acute-infection-and-risk-of-first-and-recurrent-venous-thrombosis
#7
Jasmijn F Timp, Suzanne C Cannegieter, Vladimir Tichelaar, Sigrid K Braekkan, Frits R Rosendaal, Saskia le Cessie, Willem M Lijfering
A role for transient infections in the aetiology of venous thrombosis (VT) has been suggested. This study aimed to determine whether individuals who receive antibiotic treatment (as a proxy for infections) have an increased risk of first and recurrent VT and whether infections should be seen as a provoking risk factor for VT. We used the self-controlled case series method to study the risk of first VT during antibiotic prescriptions. The risk of recurrent VT during antibiotic use was estimated by of time-dependent Cox-regression...
February 17, 2017: British Journal of Haematology
https://www.readbyqxmd.com/read/28205064/appropriateness-of-surgical-antibiotic-prophylaxis-for-breast-surgery-procedures
#8
Smeem Jaber, Crystal Rogers, Bruce Sunderland, Richard Parsons, Sarah MacKenzie, Jason Seet, Petra Czarniak
Background Guidelines for the appropriate use of antibiotic prophylaxis are provided in the Therapeutic Guidelines: Antibiotics (eTG) in Australia. Inappropriate use of antibiotics is problematic. Objective To examine adherence with therapeutic guidelines (eTG) in breast surgery and trends in non-adherence dependent on the type of breast surgery performed. Setting Major Western Australian teaching hospital. Method A retrospective cross-sectional study reviewed a random sample of 150 from 1049 eligible medical records of patients who underwent a breast surgical procedure in 2013 or 2014...
February 15, 2017: International Journal of Clinical Pharmacy
https://www.readbyqxmd.com/read/28194715/does-extracellular-dna-production-vary-in-staphylococcal-biofilms-isolated-from-infected-implants-versus-controls
#9
Beata Zatorska, Marion Groger, Doris Moser, Magda Diab-Elschahawi, Luigi Segagni Lusignani, Elisabeth Presterl
BACKGROUND: Prosthetic implant infections caused by Staphylococcus aureus and epidermidis are major challenges for early diagnosis and treatment owing to biofilm formation on the implant surface. Extracellular DNA (eDNA) is actively excreted from bacterial cells in biofilms, contributing to biofilm stability, and may offer promise in the detection or treatment of such infections. QUESTIONS/PURPOSES: (1) Does DNA structure change during biofilm formation? (2) Are there time-dependent differences in eDNA production during biofilm formation? (3) Is there differential eDNA production between clinical and control Staphylococcal isolates? (4) Is eDNA production correlated to biofilm thickness? METHODS: We investigated eDNA presence during biofilm formation in 60 clinical and 30 control isolates of S aureus and S epidermidis...
February 13, 2017: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/28193274/evaluation-of-medicines-dispensing-pattern-of-private-pharmacies-in-rajshahi-bangladesh
#10
Shuvashis Saha, Md Tawhid Hossain
BACKGROUND: In developing country like BANGLADESH, people depend more on pharmacies due to expediency, shorter waiting time, cost reduction, availability of credit and flexible opening hours. The aim of this study was to investigate medicines dispensing patterns of the pharmacies in RAJSHAHI, BANGLADESH and to identify and analyze contribution of drugsellers and quacks in irrational drug use. METHODS: This cross-sectional study was conducted during January 2016 - April, 2016 in 75 randomly selected private pharmacies including both licensed and unlicensed pharmacies of covering LAKSHMIPUR area...
February 13, 2017: BMC Health Services Research
https://www.readbyqxmd.com/read/28190552/use-of-balloon-dilatation-for-management-of-postoperative-intestinal-strictures-in-children-with-short-bowel-syndrome
#11
Christina Belza, Kevin Fitzgerald, Joao Amaral, Karen Steinberg, Yaron Avitzur, Paul W Wales
PURPOSE: Children with short bowel syndrome (SBS) often require numerous operations to optimize intestinal function. Postoperative intestinal strictures are a complication that inhibits enteral feeding advancement and prolongs parenteral nutrition dependency, often requiring reoperation. Our objective was to review our experience with fluoroscopic balloon dilatation to treat intestinal strictures. METHODS: A retrospective cohort study of intestinal failure patients with SBS was completed...
January 30, 2017: Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/28184305/once-daily-aerosolised-tobramycin-in-adult-patients-with-cystic-fibrosis-in-the-management-of-pseudomonas-aeruginosa-chronic-infection
#12
Marco Mantero, Andrea Gramegna, Giovanna Pizzamiglio, Alice D'Adda, Paolo Tarsia, Francesco Blasi
It is estimated that about 60-70% of Cystic Fibrosis patients develop Pseudomonas aeruginosa chronic infection, with progressive loss of lung function, as well as increased antibiotic resistance and mortality. The current strategy is to maintain lung function by chronic suppressive antipseudomonas antibiotic therapy. Tobramycin inhalation solution was the first approved aerosolised antibiotic to be used against P. aeruginosa; inhalatory tobramycin frequency of administration is twice daily and inhalation time is estimated to be 15 to 20 min...
2017: Multidisciplinary Respiratory Medicine
https://www.readbyqxmd.com/read/28159311/intestinal-barrier-maturation-in-very-low-birthweight-infants-relationship-to-feeding-and-antibiotic-exposure
#13
Bushra Saleem, Adora C Okogbule-Wonodi, Alessio Fasano, Laurence S Magder, Jacques Ravel, Shiv Kapoor, Rose M Viscardi
OBJECTIVE: To test the hypothesis that feeding and antibiotic exposures affect intestinal barrier maturation in preterm infants, we serially measured intestinal permeability (IP) biomarkers in infants <33 weeks gestation (gestational age [GA]) during the first 2 weeks of life. STUDY DESIGN: Eligible infants <33 weeks GA were enrolled within 4 days of birth in a prospective study of IP biomarkers (NCT01756040). Study participants received the nonmetabolized sugars lactulose/rhamnose enterally on study days 1, 8, and 15 and lactulose/rhamnose were measured in urine by high-performance liquid chromatography...
January 31, 2017: Journal of Pediatrics
https://www.readbyqxmd.com/read/28157306/mechanism-and-stereochemistry-of-polyketide-chain-elongation-and-methyl-group-epimerization-in-polyether-biosynthesis
#14
Xinqiang Xie, Ashish Garg, Chaitan Khosla, David E Cane
The polyketide synthases responsible for the biosynthesis of the polyether antibiotics nanchangmycin (1) and salinomycin (4) harbor a number of redox-inactive ketoreductase (KR(0)) domains that are implicated in the generation of C2-epimerized (2S)-2-methyl-3-ketoacyl-ACP intermediates. Evidence that the natural substrate for the polyether KR(0) domains is, as predicted, a (2R)-2-methyl-3-ketoacyl-ACP intermediate, came from a newly developed coupled ketosynthase (KS)-ketoreductase (KR) assay that established that the decarboxylative condensation of methylmalonyl-CoA with S-propionyl-N-acetylcysteamine catalyzed by the Nan[KS1][AT1] didomain from module 1 of the nanchangmycin synthase generates exclusively the corresponding (2R)-2-methyl-3-ketopentanoyl-ACP (7a) product...
February 14, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28157083/effect-of-perioperative-bacteriological-safety-on-hip-joint-infection-after-hip-replacement
#15
Iwona Morawik, Mirosław Jabłoński
BACKGROUND: In terms of clinical importance, deep infections are the most severe and problematic complications of hip replacement, and limiting the risk of these complications continues to pose a medical and organisational challenge. The aim of this retrospective study was to compare the incidence of early deep infection after hip arthroplasty in two 5-year periods separated by a long interval (1985-1989 and 2005-2009) with respect to analysing changes in the conditions of perioperative bacteriological safety...
May 5, 2016: Ortopedia, Traumatologia, Rehabilitacja
https://www.readbyqxmd.com/read/28145495/autophagic-flux-a-possible-mechanism-for-delayed-gentamicin-induced-ototoxicity
#16
Yeon Ju Kim, Chunjie Tian, Jangho Kim, Beomyong Shin, Oak-Sung Choo, You-Sun Kim, Yun-Hoon Choung
Aminoglycoside antibiotics including gentamicin (GM) induce delayed ototoxic effects such as hearing loss after long-term use, unlike the early-onset ototoxicity caused by cisplatin. The purpose of the study was to identify the mechanism of the delayed GM-induced ototoxicity by exploring the role of autophagy in vitro and in vivo. Treating HEI-OC1 auditory cells with GM led to a time-dependent increase of the autophagosome marker LC3-II, which was accompanied by cell death. In contrast, cisplatin and penicillin caused a rapid increase and had no effect on LC3-II levels, respectively...
February 1, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28141867/adherence-to-antiretroviral-therapy-art-in-yaound%C3%A3-cameroon-association-with-opportunistic-infections-depression-art-regimen-and-side-effects
#17
Julius Y Fonsah, Alfred K Njamnshi, Charles Kouanfack, Fang Qiu, Dora M Njamnshi, Claude T Tagny, Emilienne Nchindap, Léopoldine Kenmogne, Dora Mbanya, Robert Heaton, Georgette D Kanmogne
Following global efforts to increase antiretroviral therapy (ART) access in Sub-Saharan Africa, ART coverage among HIV-infected Cameroonians increased from 0% in 2003 to 22% in 2014. However, the success of current HIV treatment programs depends not only on access to ART, but also on retention in care and good treatment adherence. This is necessary to achieve viral suppression, prevent virologic failure, and reduce viral transmission and HIV/AIDS-related deaths. Previous studies in Cameroon showed poor adherence, treatment interruption, and loss to follow-up among HIV+ subjects on ART, but the factors that influence ART adherence are not well known...
2017: PloS One
https://www.readbyqxmd.com/read/28137800/the-mechanism-of-killing-by-the-proline-rich-peptide-bac7-1-35-against-clinical-strains-of-pseudomonas-aeruginosa-differs-from-that-showed-against-other-gram-negative-bacteria
#18
Giulia Runti, Monica Benincasa, Grazia Giuffrida, Giulia Devescovi, Vittorio Venturi, Renato Gennaro, Marco Scocchi
P. aeruginosa infections represent a serious threat to worldwide health. Proline-rich antimicrobial peptides (PR-AMPs), a particular group of peptide antibiotics, have demonstrated in vitro activity against P. aeruginosa strains. Here we show that the mammalian PR-AMP Bac7 (1-35) is active against some multi-drug-resistant cystic fibrosis isolates of P. aeruginosa By confocal microscopy and cytometric analyses we investigated the mechanism of killing against P. aeruginosa PAO1 and three selected isolates and we observed that the peptide inactivated the target cells by disrupting their cellular membranes...
January 30, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28122492/self-treatment-of-acute-exacerbations-of-chronic-obstructive-pulmonary-disease-requires-more-than-symptom-recognition-a-qualitative-study-of-copd-patients-perspectives-on-self-treatment
#19
Johanna Laue, Hasse Melbye, Mette Bech Risør
BACKGROUND: Self-treatment of acute exacerbations of COPD with antibiotics and/or oral corticosteroids has emerged as a promising strategy to reduce hospitalization rates, mortality and health costs. However, for reasons little understood, the effect of self-treatment, particularly when not part of comprehensive self-management programs, remains unclear. Therefore, this study aims to get insight into the patients' perspective on self-treatment of acute exacerbations of COPD, focusing specifically on how patients decide for the right moment to start treatment with antibiotics and/or oral corticosteroids, what they consider important when making this decision and aspects which might interfere with successful implementation...
January 25, 2017: BMC Family Practice
https://www.readbyqxmd.com/read/28113087/ex-vivo-antibacterial-activity-of-levofloxacin-against-escherichia-coli-and-its-pharmacokinetic-profile-following-intravenous-and-oral-administrations-in-broilers
#20
Hong Ki Lee, Virginia DeVito, Cristina Vercelli, Clara Tramuta, Patrizia Nebbia, Giovanni Re, Kaspars Kovalenko, Mario Giorgi
The use of antibiotics is necessary to treat bacterial diseases. Determination of optimal dosage in the target animals is increasingly being recognized as vital for maximizing efficacy and minimizing the risk of resistance, so this study aimed to evaluate the pharmacokinetics/pharmacodynamics (PK/PD) of levofloxacin in broilers. Using a parallel study design, each group of animals (n=20) received 5mg/kg of levofloxacin intravenously (IV) and orally (PO). Plasma, serum and tissues were collected for PK and PD studies...
January 12, 2017: Research in Veterinary Science
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