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https://www.readbyqxmd.com/read/28106348/a-biosurfactant-inspired-heptapeptide-with-improved-specificity-to-kill-mrsa
#1
Yuan Liu, Shuangyang Ding, Richard Dietrich, Erwin Märtlbauer, Kui Zhu
The emergence and rapid spread of methicillin-resistant Staphylococcus aureus (MRSA) poses a serious threat to public health. New antibiotics and strategies are urgently needed to combat S. aureus associated infections. Bacaucin, a novel cyclic lipopeptide from Bacillus subtilis CAU21, is reported. Bacaucin shows broad antibacterial activity against Gram-positive bacteria, but is also hemolytic and cytotoxic. However, bacaucin-1, a bacaucin-inspired ring-opened heptapeptide, shows specific antibacterial activity against MRSA by a membrane-disruptive mechanism without detectable toxicity to mammalian cells or induction of bacterial resistance...
February 1, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28100481/safety-of-anterior-chamber-paracentesis-using-a-30-gauge-needle-integrated-with-a-specially-designed-disposable-pipette
#2
Koji Kitazawa, Chie Sotozono, Noriko Koizumi, Kenji Nagata, Tsutomu Inatomi, Hiroshi Sasaki, Shigeru Kinoshita
AIMS: To investigate the safety of anterior chamber (AC) paracentesis using a 30-gauge needle integrated with a specially designed disposable pipette. METHODS: In this retrospective observational case-series study, AC paracentesis was performed on 301 eyes of 301 patients between September 2009 and August 2016 at the Department of Ophthalmology, Kyoto Prefectural University of Medicine and the Baptist Eye Institute, Kyoto, Japan. AC paracentesis was performed with the patient placed in the supine position using a 30-gauge needle integrated with a disposable pipette with one hand, and the safety post procedure was then evaluated...
January 18, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/28099635/currently-used-dosage-regimens-of-vancomycin-fail-to-achieve-therapeutic-levels-in-approximately-40-of-intensive-care-unit-patients
#3
Vitor Yuzo Obara, Carolina Petrus Zacas, Claudia Maria Dantas de Maio Carrilho, Vinicius Daher Alvares Delfino
Objective: This study aimed to assess whether currently used dosages of vancomycin for treatment of serious gram-positive bacterial infections in intensive care unit patients provided initial therapeutic vancomycin trough levels and to examine possible factors associated with the presence of adequate initial vancomycin trough levels in these patients. Methods: A prospective descriptive study with convenience sampling was performed. Nursing note and medical record data were collected from September 2013 to July 2014 for patients who met inclusion criteria...
October 2016: Revista Brasileira de Terapia Intensiva
https://www.readbyqxmd.com/read/28098908/protective-effects-of-ethyl-pyruvate-on-lipopolysaccharide%C3%A2-induced-acute-lung-injury-through-inhibition-of-autophagy-in-neutrophils
#4
Qingteng Zhu, Hui Wang, Hairong Wang, Yong Luo, Yang Yu, Qirong Du, Aihua Fei, Shuming Pan
Among a number of clinical factors, bacterial infection is one of the most common causes of acute lung injury (ALI), a serious complication that carries a high risk of mortality (~40%). During the process of ALI, intense local and systemic inflammation is elicited, which exacerbates the injury. Neutrophil infiltration into airspace is observed in early stage of ALI, and is required for the full development of ALI through an array of mechanisms, including the release of granule contents and the production of pro‑inflammatory cytokines, due to the overactivation of complement and cytokines...
January 13, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28097102/mechanisms-of-accelerated-liver-fibrosis-progression-during-hiv-infection
#5
REVIEW
Jose D Debes, Paul R Bohjanen, Andre Boonstra
With the introduction of antiretroviral therapy (ART), a dramatic reduction in HIV-related morbidity and mortality has been observed. However, it is now becoming increasingly clear that liver-related complications, particularly rapid fibrosis development from ART as well as from the chronic HIV infection itself, are of serious concern to HIV patients. The pathophysiology of liver fibrosis in patients with HIV is a multifactorial process whereby persistent viral replication, and bacterial translocation lead to chronic immune activation and inflammation, which ART is unable to fully suppress, promoting production of fibrinogenic mediators and fibrosis...
December 28, 2016: Journal of Clinical and Translational Hepatology
https://www.readbyqxmd.com/read/28093527/human-cystic-fibrosis-macrophages-have-defective-calcium-dependent-protein-kinase-c-activation-of-the-nadph-oxidase-an-effect-augmented-by-burkholderia-cenocepacia
#6
Kaivon Assani, Chandra L Shrestha, Frank Robledo-Avila, Murugesan V Rajaram, Santiago Partida-Sanchez, Larry S Schlesinger, Benjamin T Kopp
Macrophage intracellular pathogen killing is defective in cystic fibrosis (CF), despite abundant production of reactive oxygen species (ROS) in lung tissue. Burkholderia species can cause serious infection in CF and themselves affect key oxidase components in murine non-CF cells. However, it is unknown whether human CF macrophages have an independent defect in the oxidative burst and whether Burkholderia contributes to this defect in terms of assembly of the NADPH oxidase complex and subsequent ROS production...
January 16, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28088439/antimicrobial-activity-of-photodynamic-therapy-in-combination-with-colistin-against-a-pan-drug-resistant-acinetobacter-baumannii-isolated-from-burn-patient
#7
Ebrahim Boluki, Hossein Kazemian, Hadi Peeridogaheh, Mohammad Yousef Alikhani, Sima Shahabi, Leili Beytollahi, Roghayeh Ghorbanzadeh
Nosocomially-acquired multi-, extensively-, and pandrug resistant (MDR, XDR, and PDR) strains of microorganisms such as Acinetobacter baumannii remain a serious cause of infection and septic mortality in burn patients. Treatment of patients with nosocomial burn wound infections is often complicated by drug-resistant strains of A. baumannii. Today, many researchers are focusing on the investigation of novel non-antibiotic strategies such as photodynamic therapy (PDT). We report a new PDT strategy that suppresses colistin resistance in PDR A...
January 11, 2017: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/28079912/intravenous-immunoglobulin-in-the-treatment-of-primary-immunodeficiency-diseases
#8
Deirdre De Ranieri, Nana Sarkoah Fenny
Intravenous immunoglobulin (IVIG) has been used as antibody replacement therapy in primary immunodeficiency diseases (PIDDs) for more than 50 years. Its role as a therapeutic agent has expanded over the past couple of decades as its anti-inflammatory and immune-modulatory mechanisms of action have been elucidated. It is now used "off-label" to treat other autoimmune diseases. This article focuses on the role of IVIG in the treatment of PIDDs characterized by absent or deficient antibody production. Replacement doses are given on a monthly basis in these conditions as a prophylactic measure to prevent acute and serious bacterial infections...
January 1, 2017: Pediatric Annals
https://www.readbyqxmd.com/read/28077265/a-smart-aminoglycoside-hydrogel-with-tunable-gel-degradation-on-demand-drug-release-and-high-antibacterial-activity
#9
Jingjing Hu, Yanchun Quan, Yuping Lai, Zhao Zheng, Zhiqi Hu, Xinyu Wang, Tianjiao Dai, Qiang Zhang, Yiyun Cheng
Aminoglycosides are a family of critically important antibiotics for the treatment of serious infections including multidrug-resistant pathogens. However, clinical use of aminoglycoside antibiotics is compromised by bacterial biofilm formation at subinhibitory concentrations or adverse side effects such as ototoxicity and nephrotoxicity at high antibiotic doses. Preparation of aminoglycoside formulation that allows on-demand drug delivery is a solution to this sticky issue. Here, we designed a new type of aminoglycoside hydrogels by cross-linking oxidized polysaccharides such as dextran, carboxymethyl cellulose, alginate, and chondroitin using aminoglycosides as cross-linkers...
January 7, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28069308/partition-and-fate-analysis-of-fluoroquinolones-in-sewage-sludge-during-anaerobic-digestion-with-thermal-hydrolysis-pretreatment
#10
Ning Li, Huajie Liu, Yonggang Xue, Hongyang Wang, Xiaohu Dai
Fluoroquinolones (FQs) are broad-spectrum synthetic antibiotics that play an important role in the treatment of serious bacterial infections. FQs can reach wastewater treatment plants from different routes, and eventually accumulate in activated sludge. In this study, a solid-phase extraction (SPE) with HPLC-FLD detection method was utilized to investigate the partition and fate of FQs in digested sludge when thermal hydrolysis was used as pretreatment. As a result, thermal hydrolysis showed minor effects on the fate of FQs in batch anaerobic digestion processes, while anaerobic digestion alone removed >60% FQs and finally assisted in the mitigation of the inhibitory effects to microbial communities...
January 6, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28065582/bivalent-flagellin-immunotherapy-protects-mice-against-pseudomonas-aeruginosa-infections-in-both-acute-pneumonia-and-burn-wound-models
#11
Hosein Ahmadi, Bahador Behrouz, Gholamreza Irajian, Nour Amirmozafari, Sara Naghavi
Pseudomonas aeruginosa infections are a serious challenge to therapy because of the complex pathogenesis and paucity of new effective antibiotics, thus renewing interest in antibody-based therapeutic strategies. Immunotherapy strategies typically target selected virulence factors that are expressed by the majority of clinical strains of P. aeruginosa, particularly because virulence factors mediate infection. Type a and b flagellins (flagellin a+b) of P. aeruginosa are acute virulence factors that play a major role in the establishment of infection...
January 5, 2017: Biologicals: Journal of the International Association of Biological Standardization
https://www.readbyqxmd.com/read/28061827/systematic-review-and-network-meta-analysis-of-tedizolid-for-the-treatment-of-acute-bacterial-skin-and-skin-structure-infections-caused-by-mrsa
#12
Rachael McCool, Ian M Gould, Jacqui Eales, Teresa Barata, Mick Arber, Kelly Fleetwood, Julie Glanville, Teresa L Kauf
BACKGROUND: Tedizolid, the active moiety of tedizolid phosphate, is approved in the United States, the European Union, Canada and a number of other countries for the treatment of acute bacterial skin and skin structure infections (ABSSSI) caused by certain susceptible bacteria, including methicillin-resistant Staphylococcus aureus (MRSA). This network meta-analysis (NMA) evaluates the comparative effectiveness of tedizolid and other antibacterials indicated for the treatment of ABSSSI caused by MRSA...
January 7, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28060350/2-methacryloyloxyethyl-phosphorylcholine-polymer-treatment-of-complete-dentures-to-inhibit-denture-plaque-deposition
#13
Kenji Ikeya, Miya Fukunishi, Fuminori Iwasa, Yuuki Inoue, Kazuhiko Ishihara, Kazuyoshi Baba
Removable dentures made of poly (methyl methacrylate) (PMMA) are prone to bacterial adherence and dental plaque formation, which is called denture plaque. Denture plaque-associated infection is a source of serious dental and medical complications in the elderly. 2-Methacryloyloxyethyl phosphorylcholine (MPC) is a well-known biomedical material that exhibits marked antithrombogenicity and tissue compatibility because of its high resistance to protein adsorption and cell adhesion. Therefore, MPC polymer coatings are suggested to have the potential to inhibit plaque deposition on the surface of PMMA dentures...
December 26, 2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28060043/chikungunya-infection-in-hospitalized-febrile-infants-younger-than-3-months-of-age
#14
Narcisse Elenga, Marion Folin, Yves-Marie Vandamme, Emma Cuadro-Alvarez, Laurence Long, Falucar Njuieyon, Elise Martin, Rémi Kom-Tchameni, Antoine Defo, Sitraka Herinantenaina Razafindrakoto, Yajaira Mrsic, Pierre Couppie, Mathieu Nacher, Julie Dufour
BACKGROUND: Fever in infants younger than 3 months is generally a cause for concern because of the risk for a serious bacterial infection. The aim of this study was to describe clinical and biological features of Chikungunya infection in infants < 3 months of age hospitalized in Cayenne Hospital during the 2014-2015 outbreak. METHODS: We performed a preliminary retrospective study followed by a prospective study from March 2014 to February 2015. All infants younger than 3 months presenting with fever and hospitalized in Cayenne Hospital were included...
January 3, 2017: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/28053842/rapid-molecular-approach-for-simultaneous-detection-of-salmonella-spp-shigella-spp-and-vibrio-cholera
#15
Reza Ranjbar, Ali Naghoni, Davoud Afshar, Farhad Nikkhahi, Mohsen Mohammadi
OBJECTIVES: Gastrointestinal tract infection is still one of the serious public health problems in many geographic areas and is endemic in most countries including Iran. Early detection of the gastrointestinal tract pathogens can be extremely important. The aim of the current study was to apply a shortened time-multiplex polymerase chain reaction (PCR) for rapid and simultaneous detection of Salmonella spp., Shigella spp., and Vibrio cholera. METHODS: The standard and clinical strains of Salmonella spp...
December 2016: Osong Public Health and Research Perspectives
https://www.readbyqxmd.com/read/28051232/epidemiology-of-nosocomial-infections-about-70-cases
#16
Mohamed Hedfi, Hassen Khouni, Youssra Massoudi, Cherif Abdelhedi, Karim Sassi, Adnen Chouchen
Background - The infections associated with care (IAS) constitute a major public health problem by the morbi- mortality than they generate as well as by their cost to support. The prevention of these infections has become a priority for several years everywhere in the world and in the occurrence in Tunisia. Aim - The purpose of our study is to assess the prevalence of nosocomial infections as well as develop their microbiologic  profiles in the different departments of  the hospital of FSI  Marsa Tunisia and try to highlight the risk factors that can influence these infections Methods - It was a retrospective study about  patients with noscomila infection who were admitted in the different care unit of the Hospital of FSI  Marsa and this on a period of 6 years from 1 January 2009 to 31 December 2014 Results - We have identified seventy(70) patients having contracted a nososcomial infection during the period of study for 24600 hospital admission, with a prevalence rate of 0...
July 2016: La Tunisie Médicale
https://www.readbyqxmd.com/read/28049149/rela-mutant-enterococcus-faecium-with-multiantibiotic-tolerance-arising-in-an-immunocompromised-host
#17
Erin S Honsa, Vaughn S Cooper, Mohammed N Mhaissen, Matthew Frank, Jessica Shaker, Amy Iverson, Jeffrey Rubnitz, Randall T Hayden, Richard E Lee, Charles O Rock, Elaine I Tuomanen, Joshua Wolf, Jason W Rosch
: Serious bacterial infections in immunocompromised patients require highly effective antibacterial therapy for cure, and thus, this setting may reveal novel mechanisms by which bacteria circumvent antibiotics in the absence of immune pressure. Here, an infant with leukemia developed vancomycin-resistant Enterococcus faecium (VRE) bacteremia that persisted for 26 days despite appropriate antibiotic therapy. Sequencing of 22 consecutive VRE isolates identified the emergence of a single missense mutation (L152F) in relA, which constitutively activated the stringent response, resulting in elevated baseline levels of the alarmone guanosine tetraphosphate (ppGpp)...
January 3, 2017: MBio
https://www.readbyqxmd.com/read/28043903/patients-with-severe-alcoholic-hepatitis-given-prednisolone-therapy-who-have-high-circulating-levels-of-bacterial-dna-are-at-increased-risk-for-developing-infections
#18
Nikhil Vergis, Stephen R Atkinson, Suzanne Knapp, James Maurice, Michael Allison, Andrew Austin, Ewan H Forrest, Steven Masson, Anne McCune, David Patch, Stephen Ryder, Mark Wright, Mark R Thursz
BACKGROUND & AIMS: Infections are common in patients with severe alcoholic hepatitis (SAH), but little information is available on how to predict their development or their effects on patients. Prednisolone is advocated for treatment of SAH, but may increase susceptibility to infection. We compared the effects of infection on clinical outcomes of patients treated with and without prednisolone, and identified risk factors for development of infection in SAH. METHODS: We analyzed data from 1092 patients enrolled in a double-blind placebo-controlled trial to evaluate the efficacy of treatment with prednisolone (40 mg daily) or pentoxifylline (400 mg 3 times each day) in patients with SAH...
December 30, 2016: Gastroenterology
https://www.readbyqxmd.com/read/28043539/invasive-forms-of-candida-and-aspergillus-in-sputum-samples-of-pulmonary-tuberculosis-patients-attending-the-tuberculosis-reference-laboratory-in-ghaemshahr-northern-iran-an-analysis-of-samples-collected-during-the-past-10years
#19
Mohammad Reza Jabbari Amiri, Seyed Reza Aghili, Tahereh Shokohi, Mohammad Taghi Hedayati, Mahdi Abastabar, Masoud Aliyali, Masoumeh Jabbari Amiri, Hamid Hasanpour
OBJECTIVE/BACKGROUND: Tuberculosis (TB) continues to be a major public health problem worldwide. This is especially true in Northern Iran, which has high TB prevalence. The chronic nature of this disease is further exacerbated if it is accompanied by fungal infection, which usually remains undiagnosed and thus untreated. Thus, mycotic infections add fatal dimensions to pulmonary TB. Our objective was to determine the prevalence of invasive forms of fungal elements in sputum samples collected from patients with pulmonary TB at a reference laboratory in Ghaemshahr, Northern Iran, during the past 10years...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28041546/-epidural-abscess-secondary-to-sinusitis
#20
Pernille Henriksen, Noushin Yazdanyar, Lisbeth Samsø Schmidt, Marianne Sjølin Frederiksen
Approximately 0.5-2% of upper viral infections are com-licated by secondary acute bacterial sinusitis and may in rare cases evolve into more serious complications such as meningitis and intracranial abscess. Symptoms are often subtle and nonspecific as fever, headache, scalp tenderness, nausea and altered mental status. In this case report of a 12-year-old boy with an epidural abscess secondary to sinusitis we intend to increase the knowledge to these rare, but potentially life-threatening complications to ensure the optimal and timely treatment...
December 26, 2016: Ugeskrift for Laeger
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