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https://www.readbyqxmd.com/read/29334430/preclinical-therapeutic-efficacy-of-the-ciprofloxacin-eluting-sinus-stent-for-pseudomonas-aeruginosa-sinusitis
#1
Do-Yeon Cho, Dong-Jin Lim, Calvin Mackey, Daniel Skinner, Christopher Weeks, Gobind S Gill, Robert W Hergenrother, William E Swords, Bradford A Woodworth
BACKGROUND: The ciprofloxacin-coated sinus stent (CSS) has unique therapeutic potential to deliver antibiotics to the sinuses. The objective of this study is to evaluate the efficacy of the CSS stent in eliminating Pseudomonas aeruginosa infection in a rabbit model of sinusitis. METHODS: A ciprofloxacin-eluting sinus stent was created by coating ciprofloxacin/Eudragit RS100 on biodegradable poly-D/L-lactic acid (2 mg). After analyzing in-vitro inhibition of P aeruginosa (PAO-1 strain) biofilm formation, a total of 8 stents (4 shams, 4 CSSs) were placed unilaterally in rabbit maxillary sinuses via dorsal sinusotomy after inducing infection for 1 week with PAO-1...
January 15, 2018: International Forum of Allergy & Rhinology
https://www.readbyqxmd.com/read/29332293/measurement-of-cyclic-gmp-during-plant-hypersensitive-disease-resistance-response
#2
Jian Chen, Diana Bellin, Elodie Vandelle
Cyclic guanosine-3',5'-monophosphate (cGMP) is recognized as an important second messenger in plants, mediating intracellular signal in important physiological processes, including the hypersensitive disease resistance response induced by avirulent pathogens. In this context, the analysis of cGMP levels in infected plants requires an accurate and specific detection method allowing its quantification. Here, we describe an assay based on the Alphascreen technology, developed for animal cells and further adapted and optimized for the detection of cGMP in plants...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29332292/in-vivo-analysis-of-calcium-levels-and-glutathione-redox-status-in-arabidopsis-epidermal-leaf-cells-infected-with-the-hypersensitive-response-inducing-bacteria-pseudomonas-syringae-pv-tomato-avrb-pstavrb
#3
Fabrizio Gandolfo Doccula, Laura Luoni, Smrutisanjita Behera, Maria Cristina Bonza, Alex Costa
Plants react to the attack of pathogen microorganisms by mounting appropriate and efficient downstream defense responses often involving a form of localized cell death called hypersensitive response (HR).Here we describe an innovative and noninvasive protocol based on in vivo bioimaging technique coupled with utilization of genetically encoded fluorescent sensors that allows to monitor and analyze intracellular calcium (Ca2+) dynamics and changes of the glutathione redox status taking place in plant organs during plant interaction with the HR-inducing bacteria Pseudomonas syringae (PstAvrB)...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29331660/persistent-contamination-of-heater-cooler-units-for-extracorporal-circulation-cured-by-chlorhexidine-alcohol-in-water-tanks
#4
Sara Romano-Bertrand, Marine Evrevin, Chloé Dupont, Jean-Marc Frapier, Jean-Claude Sinquet, Elodie Bousquet, Bernard Albat, Estelle Jumas-Bilak
Recently, surgical site infections due to non-tuberculous Mycobacterium (NTM) have been linked to heater-cooler units (HCUs) contamination. ECDC and manufacturers now recommend the use of hydrogen peroxide in filtered water to fill HCU tanks. After implementation of these measures in our hospital, HCUs became heavily contaminated by opportunistic waterborne pathogens such as Pseudomonas aeruginosa and Stenotrophomonas maltophilia. No NTM were detected but fast-growing resistant bacteria could impair their detection...
January 10, 2018: Journal of Hospital Infection
https://www.readbyqxmd.com/read/29330994/pattern-of-causative-micro-organisms-in-catheter-related-blood-stream-infections-in-dialysis-patients-experience-from-saudi-arabia
#5
Bilal Mohsin
BACKGROUND: Catheter related blood stream infections (CRBSI) are the leading cause of morbidity in HD patients. The majority of these infections relate to haemodialysis catheters. There is a paucity of local data on microbial agents responsible for CRBSI in our region. This prompted our study. METHODS: This Prospective observatory survey was conducted in Department of Nephrology, King Fahd Hospital, Hofuf KSA from Nov 2014 to Jan 2017 (26 months). It was performed on dialysis patients with HD catheters who developed features of CRBSI...
October 2017: Journal of Ayub Medical College, Abbottabad: JAMC
https://www.readbyqxmd.com/read/29330988/microbiological-profile-from-middle-ear-and-nasopharynx-in-patients-suffering-from-chronic-active-mucosal-otitis-media
#6
Shahid Farooq Khattak, Nadeem Ahmed Sheikh, Adil Aleem, Muhammad Farooq, Kanwal Nadeem
BACKGROUND: Chronic otitis media is described as a tympanic membrane perforation and ear discharge for more than six weeks duration. Ascending infection from the nasopharynx into the middle ear cleft has been attributed to prevent resolution of chronic otitis media. This research aims to determine the association between the microbiological flora of the nasopharynx with that of the middle ear in patients suffering from chronic (active) mucosal otitis media.. METHODS: Our study is a hospital-based cross-sectional survey...
October 2017: Journal of Ayub Medical College, Abbottabad: JAMC
https://www.readbyqxmd.com/read/29327480/membrane-active-peptide-pv3-efficiently-eradicates-multidrug-resistant-pseudomonas-aeruginosa-in-a-mouse-model-of-burn-infection
#7
Hamed Memariani, Delavar Shahbazzadeh, Jean-Marc Sabatier, Kamran Pooshang Bagheri
The aim of this study was to evaluate the topical bactericidal activity of peptide PV3 against a MDR isolate of Pseudomonas aeruginosa in a mouse model of burn infection. The structural analysis of PV3 by circular dichroism spectroscopy indicated a low peptide helical content in water, whereas a high helical content was observed in the presence of the more hydrophobic 50% (v/v) trifluoroethanol/water buffer. A confocal microscopy analysis indicated that the main action of PV3 occurred at the membrane of bacteria...
January 12, 2018: APMIS: Acta Pathologica, Microbiologica, et Immunologica Scandinavica
https://www.readbyqxmd.com/read/29325990/quantitative-proteomics-reveals-a-role-of-jaz7-in-plant-defense-response-to-pseudomonas-syringae-dc3000
#8
Tong Zhang, Li Meng, Wenwen Kong, Zepeng Yin, Yang Wang, Jacqueline D Schneider, Sixue Chen
Jasmonate ZIM-domain (JAZ) proteins are key transcriptional repressors regulating various biological processes. Although many studies have studied JAZ proteins by genetic and biochemical analyses, little is known about JAZ7-associated global protein networks and how JAZ7 contributes to bacterial pathogen defense. In this study, we aim to fill this knowledge gap by conducting unbiased large-scale quantitative proteomics using tandem mass tags (TMT). We compared the proteomes of a JAZ7 knock-out line, a JAZ7 overexpression line, as well as the wild type Arabidopsis plants in the presence and absence of Pseudomonas syringae DC3000 infection...
January 8, 2018: Journal of Proteomics
https://www.readbyqxmd.com/read/29325116/differential-expression-of-antimicrobial-peptides-in-corneal-infection-and-regulation-of-antimicrobial-peptides-and-reactive-oxygen-species-by-type-iii-secretion-system-of-pseudomonas-aeruginosa
#9
Prerana Sharma, Sanjukta Guha, Prashant Garg, Sanhita Roy
Pseudomonas aeruginosa is an opportunistic pathogen and is the major cause of corneal infection worldwide that secret several virulent toxins through its type III secretion system (T3SS). In defense against pathogenic insults, epithelial cells and macrophages express antimicrobial peptides (AMPs) that are essential components of host immune response. In this study, we have determined the expression of several AMPs in patients with P. aeruginosa corneal infection. We also used an in vitro model of infection using human corneal epithelial cells and macrophages to determine the gene expression of AMPs and cellular response to wild-type and T3SS mutant P...
January 9, 2018: Pathogens and Disease
https://www.readbyqxmd.com/read/29324651/incidence-microbiological-profile-and-risk-factors-of-healthcare-associated-infections-in-intensive-care-units-a-10-year-observation-in-a-provincial-hospital-in-southern-poland
#10
Małgorzata Kołpa, Marta Wałaszek, Agnieszka Gniadek, Zdzisław Wolak, Wiesław Dobroś
Healthcare-associated infections (HAIs) occurring in patients treated in an intensive care unit (ICU) are serious complications in the treatment process. Aetiological factors of these infections can have an impact on treatment effects, treatment duration and mortality. The aim of the study was to determine the prevalence and microbiological profile of HAIs in patients hospitalized in an ICU over a span of 10 years. The active surveillance method was used to detect HAIs in adult patients who spent over 48 h in a general ICU ward located in southern Poland between 2007 and 2016...
January 11, 2018: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29324344/anti-biofilm-effect-of-novel-thiazole-acid-analogs-against-pseudomonas-aeruginosa-through-iqs-pathways
#11
Shengrong Li, Siyu Chen, Jilin Fan, Zhen Cao, Weihao Ouyang, Ning Tong, Xin Hu, Jie Hu, Peishan Li, Zifeng Feng, Xi Huang, Yuying Li, Mingshan Xie, Ruikun He, Jingyi Jian, Biyuan Wu, Chen Xu, Weijian Wu, Jialiang Guo, Jing Lin, Pinghua Sun
IQS has been proven to be a new quorum sensing (QS) system against bacterial biofilm formation, which is activated in the common phosphate-limiting environment of infected tissues taking over the central las system. Up to now, numerous biofilm inhibitors which function by affecting traditional QS system have been reported. However, no compound has been reported to exert anti-biofilm activity through IQS system. Herein, various novel IQS derivatives were synthesized by the reaction of thiazole-4-carboxylic acid with different linear alcohols (R-OH) or amines (R-NH2)...
December 27, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29323132/assembly-of-an-atypical-%C3%AE-macroglobulin-complex-from-pseudomonas-aeruginosa
#12
Samira Zouhir, Mylène Robert-Genthon, Daniel Maragno Trindade, Viviana Job, Marko Nedeljković, Cécile Breyton, Christine Ebel, Ina Attrée, Andréa Dessen
Alpha-2-macroglobulins (A2Ms) are large spectrum protease inhibitors that are major components of the eukaryotic immune system. Pathogenic and colonizing bacteria, such as the opportunistic pathogen Pseudomonas aeruginosa, also carry structural homologs of eukaryotic A2Ms. Two types of bacterial A2Ms have been identified: Type I, much like the eukaryotic form, displays a conserved thioester that is essential for protease targeting, and Type II, which lacks the thioester and to date has been poorly studied despite its ubiquitous presence in Gram-negatives...
January 11, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29322531/a-study-to-evaluate-the-primary-causes-associated-with-pseudomonas-otitis-in-60-dogs
#13
S Paterson, W Matyskiewicz
OBJECTIVES: To evaluate the primary causes, age of onset and time from diagnosis of otitis to development of Pseudomonas otitis in each case. MATERIALS AND METHODS: Data from clinical records of 60 dogs were extracted to address the study objectives. Pseudomonas otitis was diagnosed by clinical signs and positive culture. RESULTS: In total, 57 purebred dogs and three crossbreed dogs were included: 32 dogs had unilateral and 28 bilateral disease...
January 11, 2018: Journal of Small Animal Practice
https://www.readbyqxmd.com/read/29322242/utility-of-fosfomycin-as-antibacterial-prophylaxis-in-patients-with-hematologic-malignancies
#14
Tanya Zapolskaya, Sarah Perreault, Dayna McManus, Jeffrey E Topal
PURPOSE: Prolonged and profound neutropenia is common among hematology and hematopoietic stem cell transplant (HSCT) patients as a result of chemotherapy. The National Comprehensive Cancer Network (NCCN) and Infectious Diseases Society of America (IDSA) currently recommend antibacterial prophylaxis in patients who are deemed at intermediate or high risk for infection. Specifically, fluoroquinolone prophylaxis should be considered for high-risk neutropenic patients. However, with prolonged and frequent exposure to fluoroquinolones, these high-risk patients may develop resistance to these agents...
January 10, 2018: Supportive Care in Cancer: Official Journal of the Multinational Association of Supportive Care in Cancer
https://www.readbyqxmd.com/read/29322006/attenuation-of-quorum-sensing-dependent-virulence-factors-and-biofilm-formation-by-medicinal-plants-against-antibiotic-resistant-pseudomonas-aeruginosa
#15
P Sankar Ganesh, V Ravishankar Rai
Pseudomonas aeruginosa use small signaling molecules such as acyl homoserine lactones (AHLs), which play an important role in release virulence factors and toxin for further establishment of host infection. Thus, involving with the QS system would provide alternative ways of preventing the pathogenicity. In the present study, totally six medicinal plants (Terminalia bellerica, Celastrus paniculatus, Kingiodendron pinnatum, Schleichera oleosa, Melastoma malabathricum, Garcinia gummi-gutta) were screened for anti-QS activity using biomonitor strain of Chromobacterium violaceum CV12472...
January 2018: Journal of Traditional and Complementary Medicine
https://www.readbyqxmd.com/read/29321937/marijuana-bong-pseudomonas-lung-infection-a-detrimental-recreational-experience
#16
Agni Nhirmal Kumar, Chun Ian Soo, Boon Hau Ng, Tidi Hassan, Andrea Yu-Lin Ban, Roslina Abdul Manap
The use of Cannabis sativa, also known as marijuana, is believed to have dated back to thousands of years B.C. More than 200 decades later, it remains a popular recreational psychoactive substance that can be smoked through a water pipe. We report a case of marijuana smoking via a "bong" device, which has resulted in severe Pseudomonas aeruginosa necrotizing pneumonia treated with conservative medical therapy. This case highlights the importance of recognizing that life-threatening pneumonia can potentially be linked to marijuana and "bong" usage...
February 2018: Respirology Case Reports
https://www.readbyqxmd.com/read/29321384/discovery-of-a-novel-fluoroquinolone-antibiotic-candidate-wfq-228-with-potent-antimicrobial-activity-and-the-potential-to-overcome-major-drug-resistance
#17
Tatsuya Hirano, Tomohiko Kinoshita, Daichi Kazamori, Satoshi Inoue, Kouji Nishimura, Asuka Sakurai, Kensuke Ohishi, Yasuhiro Kuramoto, Hirotaka Amano, Akira Yazaki
WFQ-101 with a unique N-1 substituent, 5-amino-4-fluoro-2-(hydroxymethyl)phenyl group, was selected as a lead compound through combination screening based on antimicrobial activity and the efflux index against quinolone-resistant (QR) Pseudomonas aeruginosa (P. aeruginosa). Through structural optimization, we identified WFQ-228 as a novel fluoroquinolone antibiotic candidate. WFQ-228 had potent and superior activity in comparison to levofloxacin (LVX) and ciprofloxacin (CIP) against clinical isolates of P. aeruginosa, Escherichia coli and Acinetobacter baumannii, including QR strains...
January 11, 2018: Chemical & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/29320769/electronic-nose-in-the-detection-of-wound-infection-bacteria-from-bacterial-cultures-a-proof-of-principle-study
#18
Taavi Saviauk, Juha P Kiiski, Maarit K Nieminen, Nelly N Tamminen, Antti N Roine, Pekka S Kumpulainen, Lauri J Hokkinen, Markus T Karjalainen, Risto E Vuento, Janne J Aittoniemi, Terho J Lehtimäki, Niku K Oksala
BACKGROUND: Soft tissue infections, including postoperative wound infections, result in a significant burden for modern society. Rapid diagnosis of wound infections is based on bacterial stains, cultures, and polymerase chain reaction assays, and the results are available earliest after several hours, but more often not until days after. Therefore, antibiotic treatment is often administered empirically without a specific diagnosis. METHODS: We employed our electronic nose (eNose) system for this proof-of-concept study, aiming to differentiate the most relevant bacteria causing wound infections utilizing a set of clinical bacterial cultures on identical blood culture dishes, and established bacterial lines from the gaseous headspace...
January 10, 2018: European Surgical Research. Europäische Chirurgische Forschung. Recherches Chirurgicales Européennes
https://www.readbyqxmd.com/read/29319507/inhibition-of-multidrug-resistant-gram-positive-and-gram-negative-bacteria-by-a-photoactivated-porphyrin
#19
Moreno Bondi, Anna Mazzini, Simona de Niederhäusern, Ramona Iseppi, Patrizia Messi
The authors studied the in vitro antibacterial activity of the photo-activated porphyrin meso-tri(N-methyl-pyridyl), mono(N-tetradecyl-pyridyl)porphine (C14) against four multidrug-resistant bacteria: Staphylococcus aureus, Enterococcus faecalis (Gram-positive), Escherichia coli, Pseudomonas aeruginosa (Gram-negative). Using 10 μg/ml of porphyrin and 60 sec irradiation we observed the remarkable susceptibility of S. aureus and E. faecalis to treatment while, under the same conditions, E. coli and P. aeruginosa showed very low susceptibility...
December 4, 2017: Polish Journal of Microbiology
https://www.readbyqxmd.com/read/29317913/prevalence-and-risk-factors-for-bloodstream-infection-present-on-hospital-admission
#20
Sainfer Aliyu, Bevin Cohen, Jianfang Liu, Elaine Larson
Background: Bloodstream infection present on hospital admission (BSI-POA) is a major cause of morbidity and mortality. The purpose of this study was to measure prevalence and describe the risk factors of patients with BSI-POA and to determine the prevalence of resistance in isolates by admission source. Methods: We conducted a retrospective cohort study of patients discharged from three hospitals in New York City between 2006 and 2014. BSI-POA was defined as BSI diagnosed within 48 h of hospitalisation...
January 2018: Journal of Infection Prevention
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