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https://www.readbyqxmd.com/read/28943762/evaluation-on-antimicrobial-activity-of-psoraleae-semen-extract-controlling-the-growth-of-gram-positive-bacteria
#1
Sejeong Kim, Soomin Lee, Heeyoung Lee, Jimyeong Ha, Jeeyeon Lee, Yukyung Choi, Hyemin Oh, Joonbae Hong, Yohan Yoon, Kyoung-Hee Choi
This study investigated bacterial growth-inhibitory effect of 69 therapeutic herbal plants extracts on 9 bacterial strains using a disc diffusion assay. Especially, the antimicrobial activity of Psoraleae semen, which showed different activity on pathogenic Gram-positive and Gram-negative bacteria, was evaluated by MIC (minimal inhibition concentration) and biofilm formation assay. The effect of Psoraleae semen extract on bacterial cell membranes was examined by measurement of protein leakage (optical density at 280 nm) and scanning electron microscope (SEM)...
2017: Korean Journal for Food Science of Animal Resources
https://www.readbyqxmd.com/read/28943633/vancomycin-induced-leukocytoclastic-vasculitis-and-acute-renal-failure-due-to-tubulointerstitial-nephritis
#2
Chandra Shekar Pingili, Emmanuel E Okon
BACKGROUND Methicillin-resistant Staphylococcus aureus (MRSA) bacteremia and sepsis are commonly treated with intravenous vancomycin. However, vancomycin treatment is associated adverse reactions, including skin rashes and nephrotoxicity. We present a case of acute renal failure due to acute tubulointerstitial nephritis associated with a diffuse leukocytoclastic vasculitic skin eruption following intravenous vancomycin treatment. CASE REPORT A 79-year-old Caucasian male patient was treated with intravenous vancomycin for MRSA bacteremia...
September 25, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/28942637/anti-aflatoxigenic-and-antimicrobial-activities-of-schiff-bases-of-2-hydroxy-4-methoxybenzaldehyde-cinnamaldehyde-and-similar-aldehydes
#3
Nanishankar V Harohally, Chris Cherita, Praveena Bhatt, Anu Appaiah K A
2-hydroxy-4-methoxybenzaldehyde (HMBA) is a non-toxic phenolic flavour from dietary source Decalipus hamiltonii and Hemidesmus indicus. HMBA is an excellent antimicrobial agent with additional anti-aflatoxigenic potency. On the other hand, cinnamaldehyde from cinnamon is widely employed flavour with significant anti-aflatoxigenic activity. We have attempted the enhancement of anti-aflatoxigenic and antimicrobial properties of HMBA, cinnamaldehyde and similar molecules via Schiff base formation accomplished from condensation reaction with amino sugar (D-glucamine)...
September 24, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28941698/effect-of-an-active-label-based-on-benzyl-isothiocyanate-on-the-morphology-and-ochratoxins-production-of-aspergillus-ochraceus
#4
Isabel Clemente, Margarita Aznar, Cristina Nerín
The aim of this work was the study of the main effects of benzyl isothiocyanate (BITC) on A. ochraceus morphology and on its production metabolism of ochratoxins. This compound was evaluated as active agent of an antimicrobial label in food packaging. Microbiological studies showed a slowdown in mould growth when the active material was applied to A. ochraceus and the presence of three different areas of growth. Scanning electron microscopy was successfully used to demonstrate the mode of action of BITC on this strain...
November 2017: Food Research International
https://www.readbyqxmd.com/read/28941394/ceftolozane-tazobactam-activity-against-drug-resistant-enterobacteriaceae-and-pseudomonas-aeruginosa-causing-healthcare-associated-infections-in-latin-america-report-from-an-antimicrobial-surveillance-program-2013-2015
#5
Michael A Pfaller, Dee Shortridge, Helio S Sader, Ana Gales, Mariana Castanheira, Robert K Flamm
This study evaluated the in vitro activity of ceftolozane-tazobactam and comparator agents tested against Latin American isolates of Enterobacteriaceae and Pseudomonas aeruginosa from patients with healthcare-associated infection (HAI). Ceftolozane-tazobactam is an antipseudomonal cephalosporin combined with a well-established β-lactamase inhibitor. A total of 2415 Gram-negative organisms (537 P. aeruginosa and 1878 Enterobacteriaceae) were consecutively collected in 12 medical centers located in four Latin American countries...
September 20, 2017: Brazilian Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28941161/from-clinical-observations-and-molecular-dissection-to-novel-therapeutic-strategies-for-primary-immunodeficiency-disorders
#6
REVIEW
Hans D Ochs, Daniel Petroni
The field of primary immunodeficiency diseases (PID) is rapidly expanding with more than 300 genetically defined disorders that have been clinically described and molecularly analyzed. The molecular dissection of these entities has led to the discovery of new immunologic pathways and to novel and effective disease-specific therapies. This review provides a summary of these primary immune defects categorized by clinical phenotype and molecular similarity as defined by the International Union of Immunologic Societies (IUIS) Expert Committee for PID...
September 21, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28939819/in-vivo-target-exploration-of-apidaecin-based-on-acquired-resistance-induced-by-gene-overexpression-argo-assay
#7
Ken'ichiro Matsumoto, Kurato Yamazaki, Shun Kawakami, Daichi Miyoshi, Toshihiko Ooi, Shigeki Hashimoto, Seiichi Taguchi
Identifying the target molecules of antimicrobial agents is essential for assessing their mode of action. Here, we propose Acquired Resistance induced by Gene Overexpression (ARGO) as a novel in vivo approach for exploring target proteins of antimicrobial agents. The principle of the method is based on the fact that overexpression of the expected target protein leads to reduced sensitivity to the antimicrobial agent. We applied this approach to identify target proteins of the antimicrobial peptide apidaecin, which is specifically effective against Gram-negative bacteria...
September 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28939607/multidrug-and-mupirocin-resistance-in-environmental-methicillin-resistant-staphylococcus-aureus-mrsa-collected-from-the-homes-of-people-diagnosed-with-a-community-onset-co-mrsa-infection
#8
J H Shahbazian, P D Hahn, S Ludwig, J Ferguson, P Baron, A Christ, K Spicer, P Tolomeo, A M Torrie, W B Bilker, V C Cluzet, B Hu, K Julian, I Nachamkin, S C Rankin, D O Morris, E Lautenbach, M F Davis
Patients with community-onset methicillin-resistant Staphylococcus aureus (CO-MRSA) infections contribute to MRSA contamination of the home environment, and may be re-exposed to MRSA strains from this reservoir. This study evaluates One Health risk factors that focus on the relationship between humans, animals and the environment for increased prevalence of multiple antimicrobial resistant MRSA in the home environment. During a trial of patients with CO-MRSA infection, MRSA was isolated from the household environment at baseline and three months later, following randomization of patients and household members to mupirocin-based decolonization therapy or education control...
September 22, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28938860/pharmacophore-generation-atom-based-3d-qsar-molecular-docking-and-molecular-dynamics-simulation-studies-on-benzamide-analogues-as-ftsz-inhibitors
#9
Swayansiddha Tripathy, Mohammed Afzal Azam, Srikanth Jupudi, Susanta Kumar Sahu
FtsZ is an appealing target for the design of antimicrobial agent that can be used to defeat the multidrug-resistant (MDR) bacterial pathogens. Pharmacophore modelling, molecular docking, and molecular dynamics (MD) simulation studies were performed on a series of 3-substituted benzamide derivatives. In the present study a five-featured pharmacophore model with one hydrogen bond acceptors (A), one hydrogen bond donors (D), one hydrophobic (H) and two aromatic rings (RR) was developed using 97 molecules having MIC values ranging from 0...
September 22, 2017: Journal of Biomolecular Structure & Dynamics
https://www.readbyqxmd.com/read/28938624/addition-of-2-ethylamino-acetonitrile-group-to-nitroxoline-results-in-significantly-improved-anti-tumor-activity-in-vitro-and-in-vivo
#10
Ana Mitrović, Izidor Sosič, Špela Kos, Urša Lampreht Tratar, Barbara Breznik, Simona Kranjc, Bojana Mirković, Stanislav Gobec, Tamara Lah, Gregor Serša, Janko Kos
Lysosomal cysteine peptidase cathepsin B, involved in multiple processes associated with tumor progression, is validated as a target for anti-cancer therapy. Nitroxoline, a known antimicrobial agent, is a potent and selective inhibitor of cathepsin B, hence reducing tumor progression in vitro and in vivo. In order to further improve its anti-cancer properties we developed a number of derivatives using structure-based chemical synthesis. Of these, the 7-aminomethylated derivative (compound 17) exhibited significantly improved kinetic properties over nitroxoline, inhibiting cathepsin B endopeptidase activity selectively...
August 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/28936484/cetylpyridinium-chloride-cpc-exhibits-potent-rapid-activity-against-influenza-viruses-in-vitro-and-in-vivo
#11
Daniel L Popkin, Sarah Zilka, Matthew Dimaano, Hisashi Fujioka, Cristina Rackley, Robert Salata, Alexis Griffith, Pranab K Mukherjee, Mahmoud A Ghannoum, Frank Esper
BACKGROUND: There is a continued need for strategies to prevent influenza. While cetylpyridinium chloride (CPC), a broad-spectrum antimicrobial agent, has an extensive antimicrobial spectrum, its ability to affect respiratory viruses has not been studied in detail. OBJECTIVES: Here, we evaluate the ability of CPC to disrupt influenza viruses in vitro and in vivo. METHODS: The virucidal activity of CPC was evaluated against susceptible and oseltamivir-resistant strains of influenza viruses...
2017: Pathogens & Immunity
https://www.readbyqxmd.com/read/28936051/bacterial-contamination-of-multi-dose-eye-drops-at-ophthalmology-department-university-of-gondar-northwest-ethiopia
#12
Asegedech Tsegaw, Asamere Tsegaw, Tefera Abula, Yared Assefa
PURPOSE: Ophthalmic solutions used for both diagnostic and therapeutic purposes were found to be contaminated with bacteria pathogens and caused serious ocular infections such as keratitis and endophthalmitis. The objective was to assess the magnitude and pattern of bacterial contamination of multi-dose ophthalmic medications and investigate the drug susceptibility pattern of the isolates in the Department of Ophthalmology at Gondar University Teaching Hospital. METHODS: A total of 100 ophthalmic medications in-use by patients and eye-care workers have been taken and cultured for potential bacterial contamination in the Microbiology Department after 1 week and >1 week of use...
April 2017: Middle East African Journal of Ophthalmology
https://www.readbyqxmd.com/read/28934970/isolation-and-identification-of-xenorhabdus-and-photorhabdus-bacteria-associated-with-entomopathogenic-nematodes-and-their-larvicidal-activity-against-aedes-aegypti
#13
Chamaiporn Fukruksa, Thatcha Yimthin, Manawat Suwannaroj, Paramaporn Muangpat, Sarunporn Tandhavanant, Aunchalee Thanwisai, Apichat Vitta
BACKGROUND: Aedes aegypti is a potential vector of West Nile, Japanese encephalitis, chikungunya, dengue and Zika viruses. Alternative control measurements of the vector are needed to overcome the problems of environmental contamination and chemical resistance. Xenorhabdus and Photorhabdus are symbionts in the intestine of entomopathogenic nematodes (EPNs) Steinernema spp. and Heterorhabditis spp. These bacteria are able to produce a broad range of bioactive compounds including antimicrobial, antiparasitic, cytotoxic and insecticidal compounds...
September 21, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28934938/shifting-trends-in-bacteriology-and-antimicrobial-resistance-among-gastrointestinal-fistula-patients-in-china-an-eight-year-review-in-a-tertiary-care-hospital
#14
Qinjie Liu, Jianan Ren, Xiuwen Wu, Gefei Wang, Zhiwei Wang, Jie Wu, Jinjian Huang, Tianyu Lu, Jieshou Li
BACKGROUND: The purpose of this study was to determine the shifting trends in bacteriology and antimicrobial resistance of infectious specimens isolated from gastrointestinal (GI) fistula patients over eight years in China. METHODS: We retrospectively reviewed the microbial records of intra-abdominal specimens at a teaching hospital from 2008 to 2015. Study period was divided into the first half (2008-2011) and the second half (2012-2015). All isolates underwent antibiotic susceptibility testing by the micro dilution method...
September 21, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28934933/medicine-use-practices-in-management-of-symptoms-of-acute-upper-respiratory-tract-infections-in-children-%C3%A2-12%C3%A2-years-in-kampala-city-uganda
#15
Moses Ocan, Mary Aono, Clare Bukirwa, Emmanuel Luyinda, Cathy Ochwo, Elastus Nsambu, Stella Namugonza, Joseph Makoba, Enock Kandaruku, Hannington Muyende, Aida Nakawunde
BACKGROUND: Medicines are commonly accessed and used for management of illness in children without a prescription. This potentially increases the risk of unwanted treatment outcomes. We investigated medicine use practices in management of symptoms of acute upper respiratory tract infections among children (≤12 years) in households in Nakawa division, Kampala city. METHODS: This was a cross-sectional study conducted among 390 randomly selected children. Data on use of medicines in children (≤12 years) during recent episode of acute upper respiratory tract infection was collected from their care takers using an interviewer administered questionnaire...
September 21, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28934511/multi-drug-resistant-surgical-site-infection-due-to-mycobacterium-abscessus-complex
#16
Richa Misra, Vidhi Jain, Nidhi Tejan, Aarti Negi, Jyoti Umrao, Tapan Nirodhechand Dhole
M. abscessus complex is notoriously resistant to most antimicrobial agents. The complex is differentiated into 3 subspecies: M. abscessus subsp. abscessus, M. abscessus subsp. massiliense, and M. abscessus subsp. bolletii. Skin and soft tissue infections due to this organism can be acquired by direct contact with contaminated material through traumatic injury, surgical wound and environmental exposure or by secondary involvement of skin/soft tissue during disseminated disease. We report a case of Mycobacterium abscessus infection recovered from a post-operative mid-line abdominal wound to illustrate the diagnostic and management difficulties encountered in such patients...
August 1, 2017: Laboratory Medicine
https://www.readbyqxmd.com/read/28934348/antimicrobial-resistance-in-clinical-escherichia-coli-isolates-from-poultry-and-livestock-china
#17
Afrah Kamal Yassin, Jiansen Gong, Patrick Kelly, Guangwu Lu, Luca Guardabassi, Lanjing Wei, Xiangan Han, Haixiang Qiu, Stuart Price, Darong Cheng, Chengming Wang
Poultry and livestock are the most important reservoirs for pathogenic Escherichia coli and use of antimicrobials in animal farming is considered the most important factor promoting the emergence, selection and dissemination of antimicrobial-resistant microorganisms. The aim of our study was to investigate antimicrobial resistance in E. coli isolated from food animals in Jiangsu, China. The disc diffusion method was used to determine susceptibility to 18 antimicrobial agents in 862 clinical isolates collected from chickens, ducks, pigs, and cows between 2004 and 2012...
2017: PloS One
https://www.readbyqxmd.com/read/28934314/mode-of-action-of-plectasin-derived-peptides-against-gas-gangrene-associated-clostridium-perfringens-type-a
#18
Xueling Zheng, Xiumin Wang, Da Teng, Ruoyu Mao, Ya Hao, Na Yang, Lifen Zong, Jianhua Wang
NZ2114 and MP1102 are novel plectasin-derived peptides with potent activity against Gram-positive bacteria. The antibacterial characteristics and mechanism of NZ2114 and MP1102 against gas gangrene-associated Clostridium perfringens were studied for the first time. The minimal inhibitory concentration and minimal bactericidal concentration of NZ2114 and MP1102 against resistant C. perfringens type A strain CVCC 46 were 0.91 μM. Based on the fractional inhibitory concentration index (FICI) result, an additive or synergic effect was observed between NZ2114 (FICI = 0...
2017: PloS One
https://www.readbyqxmd.com/read/28933759/lactic-acid-bacteria-and-their-bacteriocins-classification-biosynthesis-and-applications-against-uropathogens-a-mini-review
#19
REVIEW
Mduduzi Paul Mokoena
Several lactic acid bacteria (LAB) isolates from the Lactobacillus genera have been applied in food preservation, partly due to their antimicrobial properties. Their application in the control of human pathogens holds promise provided appropriate strains are scientifically chosen and a suitable mode of delivery is utilized. Urinary tract infection (UTI) is a global problem, affecting mainly diabetic patients and women. Many uropathogens are developing resistance to commonly used antibiotics. There is a need for more research on the ability of LAB to inhibit uropathogens, with a view to apply them in clinical settings, while adhering to strict selection guidelines in the choice of candidate LAB...
July 26, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28933732/the-bioactivity-and-photocatalytic-properties-of-titania-nanotube-coatings-produced-with-the-use-of-the-low-potential-anodization-of-ti6al4v-alloy-surface
#20
Aleksandra Radtke, Adrian Topolski, Tomasz Jędrzejewski, Wiesław Kozak, Beata Sadowska, Marzena Więckowska-Szakiel, Magdalena Szubka, Ewa Talik, Lars Pleth Nielsen, Piotr Piszczek
Titania nanotube (TNT) coatings were produced using low-potential anodic oxidation of Ti6Al4V substrates in the potential range 3-20 V. They were analysed by X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM). The wettability was estimated by measuring the contact angle when applying water droplets. The bioactivity of the TNT coatings was established on the basis of the biointegration assay (L929 murine fibroblasts adhesion and proliferation) and antibacterial tests against Staphylococcus aureus (ATCC 29213)...
July 26, 2017: Nanomaterials
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