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https://www.readbyqxmd.com/read/28434066/toxicity-and-genotoxicity-of-three-antimicrobials-commonly-used-in-veterinary-medicine
#1
Anahí Magdaleno, Sofía Carusso, Juan Moretton
The toxicity of chlortetracycline (CTC), oxytetracycline (OTC) and enrofloxacin (ENF) was tested on two green algal species: the international standard Pseudokirchneriella subcapitata and the native Argentine species Ankistrodesmus fusiformis. All three antibiotics inhibited the algal growth. The most sensitive species was P. subcapitata, for which the EC50 for CTC, OTC and ENF were 1.19 ± 0.53, 0.92 ± 0.30 and 5.18 ± 3.80 mg L(-1), respectively. The EC50 for A. fusiformis, were 3.23 ± 0...
April 22, 2017: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28433834/antimicrobial-and-anticancer-photodynamic-activity-of-a-phthalocyanine-photosensitizer-with-n-methyl-morpholiniumethoxy-substituents-in-non-peripheral-positions
#2
Jolanta Dlugaszewska, Wojciech Szczolko, Tomasz Koczorowski, Paulina Skupin-Mrugalska, Anna Teubert, Krystyna Konopka, Malgorzata Kucinska, Marek Murias, Nejat Düzgüneş, Jadwiga Mielcarek, Tomasz Goslinski
Photodynamic therapy involves the use of a photosensitizer that is irradiated with visible light in the presence of oxygen, resulting in the formation of reactive oxygen species. A novel phthalocyanine derivative, the quaternary iodide salt of magnesium(II) phthalocyanine with N-methyl morpholiniumethoxy substituents, was synthesized, and characterized. The techniques used included mass spectrometry (MALDI TOF), UV-vis, NMR spectroscopy, and photocytotoxicity against bacteria, fungi and cancer cells. The phthalocyanine derivative possessed typical characteristics of compounds of the phthalocyanine family but the effect of quaternization was observed on the optical properties, especially in terms of absorption efficiency...
April 8, 2017: Journal of Inorganic Biochemistry
https://www.readbyqxmd.com/read/28433807/silver-nanoparticle-induced-toxicity-to-human-sperm-by-increasing-ros-reactive-oxygen-species-production-and-dna-damage
#3
Enyin Wang, Yan Huang, Qingyun Du, Yingpu Sun
Silver nanoparticles (AgNPs) have been used in medical products and industrial coatings, due to their antimicrobial properties. Excessive use of AgNPs can have adverse effects on the human body, however, their toxicity characteristics to human sperm and the potential mechanisms are not entirely clear. In this study, we exposed human sperm to different doses of AgNPs (0, 50μgml(-1), 100μgml(-1), 200μgml(-1) or 400μgml(-1)) for various times (15min, 30min, or 60min), followed by analyses of the sperm viability, motility and the ratio of abnormal to normal sperm...
April 14, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28433796/genetic-diversity-and-virulence-genes-of-salmonella-enterica-subspecies-enterica-serotype-enteritidis-isolated-from-meats-and-eggs
#4
Fatemeh Fardsanei, Mohammad Mehdi Soltan Dallal, Masoumeh Douraghi, Taghi Zahraei Salehi, Mahmood Mahmoodi, Hamed Memariani, Farhad Nikkhahi
Salmonella enterica subspecies enterica serotype Enteritidis (S. Enteritidis) is one of the leading causes of food-borne gastroenteritis associated with the consumption of contaminated food products of animal origin. Little is known about the genetic diversity and virulence content of S. Enteritidis isolated from poultry meats and eggs in Iran. A total of 34 S. Enteritidis strains were collected from different food sources of animal origin in Tehran from May 2015 to July 2016. All of the S. Enteritidis strains were serotyped, antimicrobial susceptibility tested, and characterized for virulence genes...
April 19, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28433726/managing-responsible-antimicrobial-use-perspectives-across-the-healthcare-system
#5
REVIEW
Oliver J Dyar, Gianpiero Tebano, Céline Pulcini
BACKGROUND: Healthcare systems consist of building blocks. Shaping how these building blocks function and interact can promote responsible antimicrobial use, and this represents an important opportunity for managers at different points within healthcare systems to act upon. AIMS: To review real-world examples of how healthcare systems can promote responsible antimicrobial use, focusing on the role of governance and managers. SOURCES: We searched and reviewed existing literature and official documents, which mostly focused on antibiotics...
April 19, 2017: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/28433670/evaluation-of-the-routine-antimicrobial-susceptibility-testing-results-of-clinically-significant-anaerobic-bacteria-in-a-slovenian-tertiary-care-hospital-in-2015
#6
Samo Jeverica, Urša Kolenc, Manica Mueller-Premru, Lea Papst
The aim of our study was to determined antimicrobial susceptibility profiles of 2673 clinically significant anaerobic bacteria belonging to the major genera, isolated in 2015 in a large tertiary-care hospital in Slovenia. The species identification was performed by MALDI-TOF mass spectrometry. Antimicrobial susceptibility was determined immediately at the isolation of the strains against: penicillin, co-amoxiclav, imipenem, clindamycin and metronidazole, using gradient diffusion methodology and EUCAST breakpoints...
April 19, 2017: Anaerobe
https://www.readbyqxmd.com/read/28433529/antimicrobial-peptides-within-the-yellowtail-kingfish-seriola-lalandi
#7
Simon Muncaster, Kirsty Kraakman, Olivia Gibbons, Koen Mensink, Maria Forlenza, Gregory Jacobson, Steve Bird
A number of Seriola species are currently farmed or being investigated as future aquaculture species in countries around the world. However they face a number of issues and limitations which will need to be overcome to ensure future stability and growth, one of which are disease outbreaks. Despite this, very little has been done to understand the immune system of Seriola species and very few immune genes have been characterised. Antimicrobial peptides (AMP) are naturally occurring low molecular weight polypeptides that play a major role in an organism's immune system and act effectively as a first line of defence...
April 19, 2017: Developmental and Comparative Immunology
https://www.readbyqxmd.com/read/28433180/novel-carboxymethyl-cellulose-polyvinyl-alcohol-blend-films-stabilized-by-pickering-emulsion-incorporation-method
#8
Hadi Fasihi, Mohammad Fazilati, Mahdi Hashemi, Nooshin Noshirvani
The aim of this study was to investigate the possibility of increasing the antimicrobial and antioxidant properties of biodegradable active films stabilized via Pickering emulsions. The blend films were prepared from carboxymethyl cellulose (CMC) and polyvinyl alcohol (PVA), emulsified with oleic acid (OL) and incorporated with rosemary essential oil (REO). Formation of Pickering emulsion was confirmed by scanning electron microscopy (SEM), optical microscopy, mean droplet size and emulsion stability. Morphological, optical, physical, mechanical, thermal, antifungal and antioxidant properties of the films incorporated with different concentrations of REO (0...
July 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28433178/preparation-and-characterization-of-biodegradable-nanocomposites-derived-from-carboxymethyl-cellulose-and-hydroxyapatite
#9
K Azzaoui, E Mejdoubi, A Lamhamdi, S Jodeh, O Hamed, M Berrabah, S Jerdioui, R Salghi, N Akartasse, A Errich, Á Ríos, M Zougagh
Development of a cost-effective technology for extraction and quantification of carcinogenic and toxic organic materials which are widely used in the industry are critical to humans. Membrane technology received much attention and has already been widely used in this area. In this work, we offer a newly developed bio-based nanocomposite membrane for removal of bisphenol-A (BPA) from water. Three natural components hydroxyapatite (HAp), carboxymethyl cellulose and lysine as a diluent were used for making the bio-based membrane...
July 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28433027/potential-of-mean-force-for-insertion-of-antimicrobial-peptide-melittin-into-a-pore-in-mixed-dopc-dopg-lipid-bilayer-by-molecular-dynamics-simulation
#10
Yuan Lyu, Ning Xiang, Xiao Zhu, Ganesan Narsimhan
Antimicrobial peptides (AMPs) inactivate microorganisms by forming transmembrane pores in a cell membrane through adsorption and aggregation. Energetics of addition of an AMP to a transmembrane pore is important for evaluation of its formation and growth. Such information is essential for the characterization of pore forming ability of peptides in cell membranes. This study quantifies the potential of mean force through molecular dynamics (MD) simulation for the addition of melittin, a naturally occurring AMP, into a DOPC/DOPG mixed bilayer, a mimic of bacterial membrane, for different extents of insertion into either a bilayer or a pore consisting of three to six transmembrane peptides...
April 21, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28432878/in-vitro-susceptibility-of-methicillin-resistant-staphylococcus-aureus-isolates-from-skin-and-soft-tissue-infections-to-vancomycin-daptomycin-linezolid-and-tedizolid
#11
Johanna Marcela Vanegas Múnera, Ana María Ocampo Ríos, Daniela Montoya Urrego, Judy Natalia Jiménez Quiceno
INTRODUCTION: Treatment of multidrug-resistant Gram-positive infections caused by Staphylococcus aureus remains as a clinical challenge due to emergence of new resistance mechanisms. Tedizolid is a next-generation oxazolidinone, recently approved for skin and soft tissues infections. We conducted a study to determine in vitro susceptibility to vancomycin, daptomycin, linezolid, and tedizolid in MRSA clinical isolates from adult patients with skin and soft tissue infections. MATERIAL AND METHODS: Methicillin-resistant S...
April 19, 2017: Brazilian Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28432633/synthesis-spectral-properties-and-dft-calculations-of-new-ruthenium-ii-polypyridyl-complexes-dna-binding-affinity-and-in-vitro-cytotoxicity-activity
#12
Rajender Reddy Mallepally, Nagamani Chintakuntla, Venkat Reddy Putta, Nagasuryaprasad K, Ravi Kumar Vuradi, Madhuri P, Satyanarayana Singh S, Ramesh Kumar Chitumalla, Joonkyung Jang, Nagababu Penumaka, Satyanarayana Sirasani
In this paper a novel ligand debip (2-(4-N,N-diethylbenzenamine)1H-imidazo[4,5-f] [1, 10]phenanthroline) and its Ru(II) polypyridyl complexes [Ru(L)2(debip)](2+), (L = phen (1), bpy (2) and dmb (3)) have been synthesized and characterized by spectroscopic techniques. The DNA binding studies for all these complexes were examined by absorption, emission, quenching studies, viscosity measurements and cyclic voltammetry. The light switching properties of complexes 1-3 have been evaluated. Molecular docking, Density Functional Theory (DFT) and time dependent DFT calculations were performed...
April 22, 2017: Journal of Fluorescence
https://www.readbyqxmd.com/read/28432607/impact-of-the-medical-specialty-on-knowledge-regarding-multidrug-resistant-organisms-and-strategies-toward-antimicrobial-stewardship
#13
Steffen Lebentrau, Christian Gilfrich, Malte W Vetterlein, Harald Schumacher, Philipp J Spachmann, Sabine D Brookman-May, Hans M Fritsche, Martin Schostak, Florian M Wagenlehner, Maximilian Burger, Matthias May
PURPOSE: Evidence is scarce on subject-specific knowledge of multidrug-resistant organisms and rational use of antibiotics. We aimed at evaluating attitude, perception, and knowledge about multidrug-resistant organisms (MDRO) and antibiotic prescribing among urologists versus other medical specialties. METHODS: Within the MR2-study (Multiinstitutional Reconnaissance of practice with MultiResistant bacteria), a questionnaire was conducted targeting general surgeons, internists, gynecologists, and urologists in 18 German hospitals...
April 21, 2017: International Urology and Nephrology
https://www.readbyqxmd.com/read/28432381/modulation-of-the-multidrug-efflux-pump-emrd-3-from-vibrio-cholerae-by-allium-sativum-extract-and-the-bioactive-agent-allyl-sulfide-plus-synergistic-enhancement-of-antimicrobial-susceptibility-by-a-sativum-extract
#14
Merissa M Bruns, Prathusha Kakarla, Jared T Floyd, Mun Mun Mukherjee, Robert C Ponce, John A Garcia, Indrika Ranaweera, Leslie M Sanford, Alberto J Hernandez, T Mark Willmon, Grace L Tolson, Manuel F Varela
The causative agent of cholera, Vibrio cholerae, is a public health concern. Multidrug-resistant V. cholerae variants may reduce chemotherapeutic efficacies of severe cholera. We previously reported that the multidrug efflux pump EmrD-3 from V. cholerae confers resistance to multiple structurally distinct antimicrobials. Medicinal plant compounds are potential candidates for EmrD-3 efflux pump modulation. The antibacterial activities of garlic Allium sativum, although poorly understood, predicts that a main bioactive component, allyl sulfide, modulates EmrD-3 efflux...
April 21, 2017: Archives of Microbiology
https://www.readbyqxmd.com/read/28432358/differential-sensitivity-to-infections-and-antimicrobial-peptide-mediated-immune-response-in-four-silkworm-strains-with-different-geographical-origin
#15
Ottavia Romoli, Alessio Saviane, Andrea Bozzato, Paola D'Antona, Gianluca Tettamanti, Andrea Squartini, Silvia Cappellozza, Federica Sandrelli
The domesticated silkworm Bombyx mori has an innate immune system, whose main effectors are the antimicrobial peptides (AMPs). Silkworm strains are commonly grouped into four geographical types (Japanese, Chinese, European and Tropical) and are generally characterised by a variable susceptibility to infections. To clarify the genetic and molecular mechanisms on which the different responses to infections are based, we exposed one silkworm strain for each geographical area to oral infections with the silkworm pathogens Enterococcus mundtii or Serratia marcescens...
April 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28432320/formation-of-cuo-nano-flowered-surfaces-via-submerged-photo-synthesis-of-crystallites-and-their-antimicrobial-activity
#16
Fumika Nishino, Melbert Jeem, Lihua Zhang, Kazumasa Okamoto, Satoshi Okabe, Seiichi Watanabe
We report the fabrication of flower-like CuO nanostructured surfaces via submerged photo-synthesis of crystallites (SPSC), which requires only UV illumination in neutral water. In this paper, we discuss the reaction mechanism of the photochemical formation of the SPSC-fabricated CuO nanostructures in detail based on surface microstructural analyses and a radiation-chemical consideration with additional gamma-ray irradiation. Since the SPSC method for surface nanostructural fabrication can work at low temperatures at atmospheric pressure without using harmful substances, it is a potential fabrication method for green nanotechnology applications...
April 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28432285/nod1-modulates-il-10-signalling-in-human-dendritic-cells
#17
Theresa Neuper, Kornelia Ellwanger, Harald Schwarz, Thomas A Kufer, Albert Duschl, Jutta Horejs-Hoeck
NOD1 belongs to the family of NOD-like receptors, which is a group of well-characterised, cytosolic pattern-recognition receptors. The best-studied function of NOD-like receptors is their role in generating immediate pro-inflammatory and antimicrobial responses by detecting specific bacterial peptidoglycans or by responding to cellular stress and danger-associated molecules. The present study describes a regulatory, peptidoglycan-independent function of NOD1 in anti-inflammatory immune responses. We report that, in human dendritic cells, NOD1 balances IL-10-induced STAT1 and STAT3 activation by a SOCS2-dependent mechanism, thereby suppressing the tolerogenic dendritic cell phenotype...
April 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28432206/identifying-factors-that-lead-to-the-persistence-of-imported-gonorrhoeae-strains-a-modelling-study
#18
Ben B Hui, David M Whiley, Basil Donovan, Matthew G Law, David G Regan
OBJECTIVE: The importation of Neisseria gonorrhoeae (NG) strains from overseas is believed to be the main source of antimicrobial resistance in Australia. With recent sporadic cases of ceftriaxone-resistant gonorrhoea reported in Australia and elsewhere, we sought to model the potential for imported NG strains to persist in the men who have sex with men (MSM) population in Australia. METHODS: We developed an individual-based model to simulate the transmission of NG in a population of urban MSM, and used this model to investigate factors contributing to the probability that an imported NG strain will persist...
May 2017: Sexually Transmitted Infections
https://www.readbyqxmd.com/read/28432193/randomised-positive-control-trial-of-nsaid-and-antimicrobial-treatment-for-calf-fever-caused-by-pneumonia
#19
S A Mahendran, R Booth, M Burge, N J Bell
One hundred and fifty-four preweaning calves were followed between May and October 2015. Calves were fitted with continuous monitoring temperature probes (TempVerified FeverTag), programmed so a flashing light emitting diode (LED) light was triggered following six hours of a sustained ear canal temperature of ≥39.7°C. A total of 83 calves (61.9 per cent) developed undifferentiated fever, with a presumptive diagnosis of pneumonia through exclusion of other calf diseases. Once fever was detected, calves were randomly allocated to treatment groups...
April 21, 2017: Veterinary Record
https://www.readbyqxmd.com/read/28432120/two-glycosaminoglycan-binding-domains-of-the-mouse-cytomegalovirus-encoded-chemokine-mck-2-are-critical-for-oligomerization-of-the-full-length-protein
#20
Sergio M Pontejo, Philip M Murphy
Chemokines are essential for antimicrobial host defenses and tissue repair. Herpesviruses and poxviruses also encode chemokines, copied from their hosts and repurposed for multiple functions, including immune evasion. The CC chemokine MCK-2 encoded by mouse cytomegalovirus (MCMV) has an atypical structure consisting of a classic chemokine domain N-terminal to a second unique domain, resulting from the splicing of MCMV ORFs m131 and m129. MCK-2 is essential for full MCMV infectivity in macrophages and for persistent infection in the salivary gland...
April 21, 2017: Journal of Biological Chemistry
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