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https://www.readbyqxmd.com/read/28651162/antibacterial-activity-corrosion-resistance-and-wear-behavior-of-spark-plasma-sintered-ta-5cu-alloy-for-biomedical-applications
#1
Jing Cui, Liang Zhao, Weiwei Zhu, Bi Wang, Cancan Zhao, Liming Fang, Fuzeng Ren
Tantalum has been widely used in orthopedic and dental implants. However, the major barrier to the extended use of such medical devices is the possibility of bacterial adhesion to the implant surface which will cause implant-associated infections. To solve this problem, bulk Ta-5Cu alloy has been fabricated by a combination of mechanical alloying and spark plasma sintering. The effect of the addition of Cu on the hardness, antibacterial activity, cytocompatibility, corrosion resistance and wear performance was systematically investigated...
June 21, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28651026/binding-of-human-plasminogen-and-high-molecular-mass-kininogen-by-cell-surface-exposed-proteins-of-candida-parapsilosis
#2
Justyna Karkowska-Kuleta, Dorota Zajac, Grazyna Bras, Oliwia Bochenska, Maria Rapala-Kozik, Andrzej Kozik
Pathogenic microbes can recruit to their cell surface human proteins that are components of important proteolytic cascades involved in coagulation, fibrinolysis and innate immune response. Once located at the bacterial or fungal surface, such deployed proteins might be utilized by pathogens to facilitate invasion and dissemination within the host organism by interfering with functionality of these systems or by exploiting specific activity of the bound enzymes. Aim of the study presented here was to characterize this phenomenon in Candida parapsilosis (Ashford) Langeron et Talice - an important causative agent of systemic fungal infections (candidiases and candidemias) in humans...
June 24, 2017: Acta Biochimica Polonica
https://www.readbyqxmd.com/read/28651010/macrophages-but-not-neutrophils-are-critical-for-proliferation-of-burkholderia-cenocepacia-and-ensuing-host-damaging-inflammation
#3
Jennifer Mesureur, Joana R Feliciano, Nelly Wagner, Margarida C Gomes, Lili Zhang, Monica Blanco-Gonzalez, Michiel van der Vaart, David O'Callaghan, Annemarie H Meijer, Annette C Vergunst
Bacteria of the Burkholderia cepacia complex (Bcc) can cause devastating pulmonary infections in cystic fibrosis (CF) patients, yet the precise mechanisms underlying inflammation, recurrent exacerbations and transition from chronic stages to acute infection and septicemia are not known. Bcc bacteria are generally believed to have a predominant extracellular biofilm life style in infected CF lungs, similar to Pseudomonas aeruginosa, but this has been challenged by clinical observations which show Bcc bacteria predominantly in alveolar macrophages...
June 26, 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28650995/septins-restrict-inflammation-and-protect-zebrafish-larvae-from-shigella-infection
#4
Maria J Mazon-Moya, Alexandra R Willis, Vincenzo Torraca, Laurent Boucontet, Avinash R Shenoy, Emma Colucci-Guyon, Serge Mostowy
Shigella flexneri, a Gram-negative enteroinvasive pathogen, causes inflammatory destruction of the human colonic epithelium. Infection by S. flexneri has been well-studied in vitro and is a paradigm for bacterial interactions with the host immune system. Recent work has revealed that components of the cytoskeleton have important functions in innate immunity and inflammation control. Septins, highly conserved cytoskeletal proteins, have emerged as key players in innate immunity to bacterial infection, yet septin function in vivo is poorly understood...
June 26, 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28650978/a-study-of-ticks-and-tick-borne-livestock-pathogens-in-pakistan
#5
Shahid Karim, Khemraj Budachetri, Nabanita Mukherjee, Jaclyn Williams, Asma Kausar, Muhammad Jawadul Hassan, Steven Adamson, Scot E Dowd, Dmitry Apanskevich, Abdullah Arijo, Zia Uddin Sindhu, Muhammad Azam Kakar, Raja Muhammad Dilpazir Khan, Shafiq Ullah, Muhammad Sohail Sajid, Abid Ali, Zafar Iqbal
BACKGROUND: As obligate blood-feeding arthropods, ticks transmit pathogens to humans and domestic animals more often than other arthropod vectors. Livestock farming plays a vital role in the rural economy of Pakistan, and tick infestation causes serious problems with it. However, research on tick species diversity and tick-borne pathogens has rarely been conducted in Pakistan. In this study, a systematic investigation of the tick species infesting livestock in different ecological regions of Pakistan was conducted to determine the microbiome and pathobiome diversity in the indigenous ticks...
June 26, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28650591/the-silver-lining-towards-the-responsible-and-limited-usage-of-silver
#6
REVIEW
Kshipra Naik, Meenal Kowshik
Silver has attracted a lot of attention as a powerful, broad spectrum and natural antimicrobial agent since the ancient times because of its non-toxic nature to the human body at low concentrations. It has been used in treatment of various infections and ulcers, storage of water, and prevention of bacterial growth on the surfaces and within materials. However there are numerous medical and health benefits of colloidal or nano silver apart from its microbicidal ability which as yet have not been fully embraced by the medical community...
June 26, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28650343/anthrax-toxin-receptor-1-is-the-cellular-receptor-for-seneca-valley-virus
#7
Linde A Miles, Laura N Burga, Eric E Gardner, Mihnea Bostina, John T Poirier, Charles M Rudin
Seneca Valley virus (SVV) is an oncolytic picornavirus with selective tropism for neuroendocrine cancers. It has shown promise as a cancer therapeutic in preclinical studies and early-phase clinical trials. Here, we have identified anthrax toxin receptor 1 (ANTXR1) as the receptor for SVV using genome-wide loss-of-function screens. ANTXR1 is necessary for permissivity in vitro and in vivo. However, robust SVV replication requires an additional innate immune defect. We found that SVV interacts directly and specifically with ANTXR1, that this interaction is required for SVV binding to permissive cells, and that ANTXR1 expression is necessary and sufficient for infection in cell lines with decreased expression of antiviral IFN genes at baseline...
June 26, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28650326/to-evaluate-the-efficacy-and-safety-of-cofnovex-plus-ema-syrup
#8
Zubair Ali, Muhammad Daniyal, Muhammad Khalid Adhia, Anees Alam, Babar Sarfaraz, Abdul Sattar, Khan Usmanghani
The cough and cold are very widespread conditions and a common purpose for advice in general practice. Utmost often the sign and symptoms of cough are produced by acute viral airway infection and the course is frequently benign. But it can be converted into bacterial super-infection and can cause acute bronchitis. Herbal medicines are used to treat symptoms of the cough and cold, and among these medicines Ivy leaf is used to treat mucous discharge and irritation in throat due to the cough and cold. In addition to synthetic substances such as acetylcysteine, carbocisteins, ambroxol and bromhexine, herbal medicines contain saponins, which are used in these indications...
March 2017: Pakistan Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28650231/pharmacokinetics-and-safety-of-ceftiofur-crystalline-free-acid-in-new-zealand-white-rabbits-oryctolagus-cuniculus
#9
Sara Gardhouse, David Sanchez-Migallon Guzman, Sherry Cox, Philip H Kass, Tracy L Drazenovich, Barbara A Byrne, Michelle G Hawkins
OBJECTIVE To determine the pharmacokinetics and adverse effects following SC administration of ceftiofur crystalline free acid (CCFA) in New Zealand White rabbits. ANIMALS 6 adult sexually intact female New Zealand White rabbits. PROCEDURES Each rabbit was administered 40 mg of CCFA/kg SC. A blood sample was obtained immediately before (0 minutes), at 5 and 30 minutes after, and at 1, 1.5, 2, 3, 4, 8, 12, 24, 48, 72, 95, 120, 144, and 168 hours after administration, and plasma concentrations of ceftiofur free acid equivalents (CFAE) were measured...
July 2017: American Journal of Veterinary Research
https://www.readbyqxmd.com/read/28649963/the-effect-of-growth-medium-on-i-escherichia-coli-i-pathway-mirrored-into-gc-ms-profiles
#10
Ileana Andreea Ratiu, Tomasz Ligor, Victor Bocos-Bintintan, Hossam Al-Suod, Tomasz Kowalkowski, Katarzyna Rafińska, Boguslaw Buszewski
Escherichia coli (E. coli) is a gram-negative coliform bacterium that is commonly found in the lower intestine of warm-blooded organisms. Most of the strains are harmless, but some serotypes are pathogenic, meaning they can cause illness, either diarrhea or illness outside of the intestinal tract. The aim of this work was to assess which components are generated in case of E. coli target analysis needed. In this purpose our study intends to emphasize the importance of the cultivability and to prove the crucial role of growth media used in bacteria growing...
June 26, 2017: Journal of Breath Research
https://www.readbyqxmd.com/read/28649808/development-of-a-real-time-loop-mediated-isothermal-amplification-assay-for-detection-of-burkholderia-mallei
#11
V Pal, A Saxena, S Singh, A K Goel, J S Kumar, M M Parida, G P Rai
Burkholderia mallei is the aetiological agent of glanders, a highly contagious and re-emerging zoonotic disease. Early diagnosis of glanders is critically important to ensure timely treatment with appropriate antibiotics in humans, and to prevent spread of infection in animals. Molecular detection of B. mallei has always been troublesome because of its genetic similarity with Burkholderia pseudomallei, the causative agent of melioidosis. In present investigation, a set of six B. mallei-specific primers were designed and a simple, rapid, specific and sensitive real-time loop-mediated isothermal amplification (LAMP) assay was developed for detection of B...
June 25, 2017: Transboundary and Emerging Diseases
https://www.readbyqxmd.com/read/28649744/mannose-binding-lectin-deficient-donors-increase-the-risk-of-bacterial-infection-and-bacterial-infection-related-mortality-after-liver-transplantation
#12
J Lombardo, G Sanclemente, J Colmenero, M Español-Rego, M T Arias, P Ruiz, E Mauro, L Sastre, G Crespo, A Rimola, A Moreno, F Lozano, M Navasa
Mannose-binding lectin (MBL) is synthesized by the liver and binds to microbes. MBL2 gene polymorphisms produce intermediate/low/null- or normal-MBL serum levels (MBL-deficient or MBL-sufficient phenotypes, respectively). We aimed to evaluate the incidence and severity of infection, rejection and survival within 1 year after liver transplantation (LT) according to donor and recipient MBL2 gene polymorphisms. A repeated-event analysis for infection episodes (negative binomial regression, Andersen-Gill model) was performed in 240 LT...
June 26, 2017: American Journal of Transplantation
https://www.readbyqxmd.com/read/28649699/a-wrky-transcription-factor-from-withania-somnifera-regulates-triterpenoid-withanolide-accumulation-and-biotic-stress-tolerance-through-modulation-of-phytosterol-and-defense-pathways
#13
Anup Kumar Singh, Sarma Rajeev Kumar, Varun Dwivedi, Avanish Rai, Shaifali Pal, Ajit K Shasany, Dinesh A Nagegowda
Withania somnifera produces pharmacologically important triterpenoid withanolides that are derived via phytosterol pathway; however, their biosynthesis and regulation remain to be elucidated. A jasmonate- and salicin-inducible WRKY transcription factor from W. somnifera (WsWRKY1) exhibiting correlation with withaferin A accumulation was functionally characterized employing virus-induced gene silencing and overexpression studies combined with transcript and metabolite analyses, and chromatin immunoprecipitation assay...
June 26, 2017: New Phytologist
https://www.readbyqxmd.com/read/28649508/isolation-of-shewanella-putrefaciens-in-an-elderly-man-with-subacute-intestinal-obstruction-appendicitis
#14
Arif Maqsood Ali, Muhammad Noorulamin, Shazia Arif
Shewanella is Gram-negative motile bacillus, non fermentative and facultative anaerobe. Its natural habitat is all forms of water and soil, but has also been isolated from fish, dairy products, oils, and carcasses. Often found with microflora of the marine environment. Bacterial infections with Shewanella spp. are rare. The exposure to the marine environment, sea and diary food are considered as a risk factor for Shewanella spp. infection. Clinical infections seen are otitis, soft tissue infection, bacteremia, ear infection, eye infection, infective arthritis, osteomyelitis, infective endocarditis and peritonitis...
2017: IDCases
https://www.readbyqxmd.com/read/28649410/komodo-dragon-inspired-synthetic-peptide-drgn-1-promotes-wound-healing-of-a-mixed-biofilm-infected-wound
#15
Ezra M C Chung, Scott N Dean, Crystal N Propst, Barney M Bishop, Monique L van Hoek
Cationic antimicrobial peptides are multifunctional molecules that have a high potential as therapeutic agents. We have identified a histone H1-derived peptide from the Komodo dragon (Varanus komodoensis), called VK25. Using this peptide as inspiration, we designed a synthetic peptide called DRGN-1. We evaluated the antimicrobial and anti-biofilm activity of both peptides against Pseudomonas aeruginosa and Staphylococcus aureus. DRGN-1, more than VK25, exhibited potent antimicrobial and anti-biofilm activity, and permeabilized bacterial membranes...
2017: NPJ Biofilms and Microbiomes
https://www.readbyqxmd.com/read/28649402/evolutionary-adaptations-of-biofilms-infecting-cystic-fibrosis-lungs-promote-mechanical-toughness-by-adjusting-polysaccharide-production
#16
Kristin Kovach, Megan Davis-Fields, Yasuhiko Irie, Kanishk Jain, Shashvat Doorwar, Katherine Vuong, Numa Dhamani, Kishore Mohanty, Ahmed Touhami, Vernita D Gordon
Biofilms are communities of microbes embedded in a matrix of extracellular polymeric substances, largely polysaccharides. Multiple types of extracellular polymeric substances can be produced by a single bacterial strain. The distinct polymer components of biofilms are known to provide chemical protection, but little is known about how distinct extracellular polysaccharides may also protect biofilms against mechanical stresses such as shear or phagocytic engulfment. Decades-long infections of Pseudomonas. aeruginosa biofilms in the lungs of cystic fibrosis patients are natural models for studies of biofilm fitness under pressure from antibiotics and the immune system...
2017: NPJ Biofilms and Microbiomes
https://www.readbyqxmd.com/read/28649308/association-between-spirometry-controlled-chest-ct-scores-using-computer-animated-biofeedback-and-clinical-markers-of-lung-disease-in-children-with-cystic-fibrosis
#17
Thomas Kongstad, Kent Green, Frederik Buchvald, Marianne Skov, Tania Pressler, Kim Gjerum Nielsen
Background: Computed tomography (CT) of the lungs is the gold standard for assessing the extent of structural changes in the lungs. Spirometry-controlled chest CT (SCCCT) has improved the usefulness of CT by standardising inspiratory and expiratory lung volumes during imaging. This was a single-centre cross-sectional study in children with cystic fibrosis (CF). Using SCCCT we wished to investigate the association between the quantity and extent of structural lung changes and pulmonary function outcomes, and prevalence of known CF lung pathogens...
2017: European Clinical Respiratory Journal
https://www.readbyqxmd.com/read/28649083/report-prevalence-of-hospital-acquired-burkholderia-cepacia-infection-and-its-antimicrobial-susceptibility-in-a-chinese-hospital
#18
Jinju Duan, Jianbang Kang, Ting Han, Yuqin Ma, Qian Guo, Yan Song, Qiang Zhao, Yan Yang, Ruiqin Zhang
This study aimed to investigate antimicrobial susceptibility of hospital acquired Burkholderia cepacia infection in Shanxi (China) during August 2009 and December 2012. To characterize an emerging nocosomial infection. The medical records of 112 patients that were tested positive for B. cepacia were retrospectively analyzed. The K-B disk diffusion method was used to determine the drug susceptibility of the isolated strains. A hundred and fifty strains of B. cepacia were isolated from 112 patients. The sensitivity rates of B...
March 2017: Pakistan Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28648894/compositional-analysis-of-endogenous-porphyrins-from-helicobacter-pylori
#19
A Battisti, P Morici, G Signore, F Ghetti, A Sgarbossa
Bacteria able to accumulate porphyrins can be inactivated by visible light irradiation thanks to the photosensitizing properties of this class of aromatic pigments (photodynamic therapy, PDT). Since the bacterial resistance to antibiotic is growing, PDT is becoming a valid alternative. In this context, the pathogen Helicobacter pylori (Hp) is a suitable target for PDT since it spontaneously produces and accumulates porphyrins. It is then important to understand the spectroscopic behavior of these endogenous species to exploit them as photosensitizers, thus improving the results given by the application of PDT in the treatment of Hp infections...
June 19, 2017: Biophysical Chemistry
https://www.readbyqxmd.com/read/28648860/global-emergence-of-the-widespread-pseudomonas-aeruginosa-st235-clone
#20
Panisa Treepong, Veronica N Kos, Christophe Guyeux, Dominique S Blanc, Xavier Bertrand, Benoit Valot, Didier Hocquet
OBJECTIVES: Despite the non-clonal epidemic population structure of Pseudomonas aeruginosa, several multi-locus sequence types are distributed worldwide and are frequently associated with epidemics where multidrug resistance confounds treatment. ST235 is the most prevalent of these widespread clones. In this study we aimed to understand the origin of ST235 and the molecular basis for its success. METHODS: The genomes of 79 P. aeruginosa ST235 isolates collected worldwide over a 27-year period were examined...
June 22, 2017: Clinical Microbiology and Infection
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