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https://www.readbyqxmd.com/read/29791598/chemical-characterization-antioxidant-and-antimicrobial-activity-of-propolis-obtained-from-melipona-quadrifasciata-quadrifasciata-and-tetragonisca-angustula-stingless-bees
#1
A R Torres, L P Sandjo, M T Friedemann, M M Tomazzoli, M Maraschin, C F Mello, A R S Santos
In this study, we investigated the chemical composition, and antioxidant and antibacterial properties of ethanolic extracts of propolis (EEP) from Melipona quadrifasciata quadrifasciata and Tetragonisca angustula. Chemical composition of EEP was determined by colorimetry and chromatographic (HPLC-DAD and UPLC-Q/TOF-MS/MS) analysis. Antimicrobial activity of EEP was evaluated against gram-positive (S. aureus, methicillin-resistant S. aureus, E. faecalis) and gram-negative (E. coli and K. pneumoniae) bacteria by the minimal inhibitory concentration (MIC) test using the microdilution method...
2018: Brazilian Journal of Medical and Biological Research, Revista Brasileira de Pesquisas Médicas e Biológicas
https://www.readbyqxmd.com/read/29787914/free-radical-rearrangement-synthesis-and-microbiological-evaluation-of-novel-2-sulfoether-4-quinolone-scaffolds-as-potential-antibacterial-agents
#2
Kehan Xu, Shaosheng He, Shichao Chen, Guoliang Qiu, Jingbo Shi, Xinhua Liu, Xiaoyu Wu, Jing Zhang, Wenjian Tang
To develop novel antibacterial agents, 2-sulfoether-4-quinolone scaffolds were synthesized by a free radical process and evaluated for their antibacterial abilities. Excellent activities against Gram-positive bacteria were observed, among which compounds 3m, 3n, 3p and 3t possessed the lowest MICs against both S. aureus and B. cereus (0.8 μM and 1.61 μM, respectively). The structure-activity relationship (SAR) showed that: (i) the antibacterial activity was related to the substituent, such as 2-SCH3  = 2-SCH2 CH3  > 2-S(=O)CH3  > 2-OH, 8-Br > 7-Br > 6-Br; (ii) -CF3 increased the antibacterial activity; (iii) the di-substituted group performed the better activity...
May 19, 2018: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29784512/epidemiology-and-etiology-of-invasive-bacterial-infection-in-infants-%C3%A2-60-days-old-treated-in-emergency-departments
#3
Christopher Woll, Mark I Neuman, Christopher M Pruitt, Marie E Wang, Eugene D Shapiro, Samir S Shah, Russell J McCulloh, Lise E Nigrovic, Sanyukta Desai, Adrienne G DePorre, Rianna C Leazer, Richard D Marble, Fran Balamuth, Elana A Feldman, Laura F Sartori, Whitney L Browning, Paul L Aronson
OBJECTIVES: To help guide empiric treatment of infants ≤60 days old with suspected invasive bacterial infection by describing pathogens and their antimicrobial susceptibilities. STUDY DESIGN: Cross-sectional study of infants ≤60 days old with invasive bacterial infection (bacteremia and/or bacterial meningitis) evaluated in the emergency departments of 11 children's hospitals between July 1, 2011 and June 30, 2016. Each site's microbiology laboratory database or electronic medical record system was queried to identify infants from whom a bacterial pathogen was isolated from either blood or cerebrospinal fluid...
May 18, 2018: Journal of Pediatrics
https://www.readbyqxmd.com/read/29770172/prevention-of-cross-contamination-risk-by-disinfection-of-irreversible-hydrocolloid-impression-materials-with-ozonated-water
#4
Omid Savabi, Farahnaz Nejatidanesh, Kamran Poshang Bagheri, Leila Karimi, Ghazal Savabi
Background: Disinfection of dental impression is mandatory for preventing the cross infection between dental staff and dental laboratory. Ozone as a disinfectant can be used in various ways in dentistry. The aim of this study was to evaluate the efficacy of ozonated water for disinfection of irreversible hydrocolloid impression materials and preventing cross-contamination. Methods: Thirty-two circular specimens (1 cm diameter and 2 mm thickness) of irreversible hydrocolloid impression material were made...
2018: International Journal of Preventive Medicine
https://www.readbyqxmd.com/read/29759089/thrombocytopenia-in-bacteraemia-and-association-with-bacterial-species
#5
D Johansson, M Rasmussen, M Inghammar
Thrombocytopenia is common in patients with invasive bacterial infections. Bacteria can activate platelets, but it is unclear if this affects platelet count. The aim of this study was to examine whether bacteraemia with Staphylococcus aureus, which readily activate human platelets, was more likely to be complicated by thrombocytopenia than bacteraemia with Escherichia coli or Streptococcus pneumoniae with different abilities to activate platelets.We compared information from 600 adult patients with community-acquired bacteraemia with S...
May 15, 2018: Epidemiology and Infection
https://www.readbyqxmd.com/read/29756429/bacterial-osteomyelitis-microbiological-clinical-therapeutic-and-evolutive-characteristics-of-344-episodes
#6
E García Del Pozo, J Collazos, J A Cartón, D Camporro, V Asensi
OBJECTIVE: Osteomyelitis is a difficult-to-cure infection, with high relapse rate despite adequate therapy. Large published osteomyelitis series in adults are rare. METHODS: A total of 344 adult osteomyelitis patients were studied and followed > 12 months after hospital discharge. Demographic, microbiological, clinical, therapeutic and outcome data were analyzed. RESULTS: Mean age was 52.5 ± 18.3 years and 233 (67.7%) were male. Main osteomyelitis types were post-surgical (31...
May 11, 2018: Revista Española de Quimioterapia: Publicación Oficial de la Sociedad Española de Quimioterapia
https://www.readbyqxmd.com/read/29755606/chronic-osteomyelitis-bacterial-flora-antibiotic-sensitivity-and-treatment-challenges
#7
Kuzma Jerzy, Hombhanje Francis
Background: Chronic osteomyelitis is a catastrophic sequel of delayed diagnosis of acute osteomyelitis. Objectives: The objectives of the study were to determine bacterial flora and antibiotic sensitivity, and to evaluate the outcome of an aggressive surgical approach to chronic osteomyelitis. Methods: This is a single surgeon, prospective cohort study on 30 consecutive patients with clinically and radiologically diagnosed chronic osteomyelitis presented to a hospital...
2018: Open Orthopaedics Journal
https://www.readbyqxmd.com/read/29754478/methicillin-resistant-staphylococcus-aureus-contamination-of-phlebotomy-tourniquets-and-faucets
#8
T Abeywickrama, K Amarasinghe, S Wijerathne, C Dharmaratne, D Fernando, B C Senaratna, H A K M Gunasekera
Introduction: Methicillin resistant Staphylococcus aureus (MRSA) is transmitted through direct contact or fomites. The most important means of nosocomial spread is by hospital personnel. However, fomites are being increasingly recognized as sources of nosocomial infection. Objectives: Our aim was to describe the MRSA contamination rate of phlebotomy tourniquets and faucets in a tertiary care hospital and to compare the contamination of plastic tourniquets with that of fabric tourniquets...
March 31, 2018: Ceylon Medical Journal
https://www.readbyqxmd.com/read/29751119/bacteriological-relevance-of-linezolid-versus-vancomycin-in-postoperative-empirical-treatment-of-osteoarticular-infections-a-retrospective-single-center-study
#9
E Takoudju, P Bemer, S Touchais, N Asseray, S Corvec, L Khatchatourian, N Serandour, D Boutoille
BACKGROUND: Our center replaced vancomycin by linezolid in 2015 for the postoperative empirical treatment of osteoarticular infections (OAI). OBJECTIVES: This work aims to assess the bacteriological relevance of linezolid for orthopaedic postoperative probabilistic antibiotic therapy. METHODS: Analysis of an observational cohort of patients empirically treated by a combination of linezolid with piperacillin/tazobactam during the immediate postoperative stage for an OAI between July 1st 2015 and July 1st 2016, in a French reference center...
May 8, 2018: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/29750587/the-microbiologic-profile-of-dacryocystitis
#10
Stella Y Chung, Leon Rafailov, Roger E Turbin, Paul D Langer
PURPOSE: Recent studies suggest an increasing incidence of gram-negative bacteria and methicillin-resistant Staphylococcus aureus in dacryocystitis. Since patients are often treated empirically without culture data, a changing microbiologic profile will markedly affect the success of oral treatment. To provide current guidelines for the treatment of this common condition, we investigated the microbiology and antibiogram of dacryocystitis seen at our institution. METHODS: The charts of all patients presenting with acute and/or chronic dacryocystitis in University Hospital, Newark, from 2007 to 2015 were reviewed...
May 11, 2018: Orbit
https://www.readbyqxmd.com/read/29747810/oral-health-interventions-using-chlorhexidine-effects-on-the-prevalence-of-oral-opportunistic-pathogens-in-stroke-survivors-a-randomized-clinical-trial
#11
Normaliza Ab Malik, Fathilah Abdul Razak, Sa'ari Mohamad Yatim, Otto Lok Tao Lam, Lijian Jin, Leonard S W Li, Colman McGrath
OBJECTIVE: To evaluate the presence of oral opportunistic pathogens among stroke survivors, both before and after oral health care interventions. METHODS: A multicenter randomized clinical trial was conducted on hospitalized stroke survivors. Those in the control group were given standard care of oral hygiene (a manual toothbrush and toothpaste), whereas those in the test group were given intense care of oral hygiene (a powered toothbrush and 1% chlorhexidine oral gel)...
June 2018: Journal of Evidence-based Dental Practice
https://www.readbyqxmd.com/read/29746375/prevalence-and-molecular-characterization-of-s-aureus-and-mrsa-on-children-s-playgrounds
#12
Dipendra Thapaliya, Jhalka Kadariya, Mike Capuano, Haleigh Rush, Clair Yee, Mark Oet, Sapana Lohani, Tara C Smith
BACKGROUND: Staphylococcus aureus is a major public health concern due to the emergence of virulent and drug resistant strains such as methicillin-resistant Staphylococcus aureus (MRSA). Although numerous studies have been conducted to assess the environmental contamination of S. aureus in health-care and household settings, little is known about the prevalence and epidemiology of S. aureus, including MRSA, on environmental surfaces of children's playgrounds. This study investigated the prevalence and molecular epidemiology of S...
May 9, 2018: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/29738797/antibacterial-and-antioxidant-electrospun-materials-from-poly-3-hydroxybutyrate-and-polyvinylpyrrolidone-containing-caffeic-acid-phenethyl-ester-in-and-on-strategies-for-enhanced-solubility
#13
Milena Ignatova, Nevena Manolova, Iliya Rashkov, Nadya Markova
Caffeic acid phenethyl ester (CAPE) possesses a set of valuable biological properties: antioxidant, antibacterial, antitumor, anti-inflammatory, antiviral, etc. However, CAPE is poorly soluble in aqueous environment which is limiting its possible therapeutic applications. In the present study novel fibrous materials enhancing CAPE solubility and accelerating CAPE release were developed. The materials were prepared from poly(3-hydroxybutyrate) (PHB) by electrospinning and by electrospinning combined with dip-coating...
May 5, 2018: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/29735822/molecular-characterisation-of-staphylococcus-aureus-using-spa-typing-as-a-diagnostic-tool-in-haryana-india
#14
Gurjeet Singh, Shobha Broor, Priti Agarwal
Background: Staphylococcus aureus is one of the top six most common etiologic agents of nosocomial, community and livestock acquired bacterial infections. These infections although initially were described as a major problem in hospitals have now also become a serious threat in community not only in India but also worldwide. Its prevalence varies depending on the health-care setting, country or a particular region. Thus to better understand the epidemiology of methicillin-resistant S...
January 2018: Indian Journal of Medical Microbiology
https://www.readbyqxmd.com/read/29735090/effect-of-microencapsulated-jabuticaba-myrciaria-cauliflora-extract-on-quality-and-storage-stability-of-mortadella-sausage
#15
Juliana C Baldin, Paulo E S Munekata, Euder C Michelin, Yana J Polizer, Poliana M Silva, Thais M Canan, Manoela A Pires, Silvia H S Godoy, Carmen S Fávaro-Trindade, Cesar G Lima, Andrezza M Fernandes, Marco A Trindade
The aim of the present study was to add microencapsulated Jabuticaba aqueous extract (MJE) to mortadella as a natural dye and to evaluate its possible antioxidant and antimicrobial activity during refrigeration. Anthocyanins in the extract were quantified and identified. Three treatments of mortadella were prepared: without dye (Control), with cochineal carmine (Carmine) and with the addition of 2% MJE. We determined the chemical composition of mortadella, along with pH, instrumental color, lipid oxidation, microbiological characteristics (Escherichia coli, Staphylococcus aureus, Salmonella, sulphite-reducing Clostridium, aerobic mesophiles, aerobic psychrotrophics and lactic acid bacteria) and sensory acceptance during storage at 4 °C for 56 days...
June 2018: Food Research International
https://www.readbyqxmd.com/read/29730068/biofilm-testing-of-microbiota-an-essential-step-during-corneal-scrap-examination-in-egyptian-acanthamoebic-keratitis-cases
#16
Marwa A Hasby Saad, Haidy S M Khalil
PURPOSE: To detect co-infections in the culture-proven acanthamoebic keratitis (AK) cases, and to test the capability of biofilm formation in the isolated microbiota. The clinical findings, habit of wearing contact lens and in-vitro antibiotic resistance were analyzed further according to the biofilm formation capability. METHODS: After clinical examination, corneal scraps and swabs were taken from 240 clinically suspected AK cases, for Acanthamoeba and microbiological cultures...
May 3, 2018: Parasitology International
https://www.readbyqxmd.com/read/29722835/catheter-related-bloodstream-infections-in-patients-with-intestinal-failure-receiving-home-parenteral-support-risks-related-to-a-catheter-salvage-strategy
#17
Siri Tribler, Christopher F Brandt, Kristian A Fuglsang, Michael Staun, Per Broebech, Claus E Moser, Thomas Scheike, Palle B Jeppesen
Background: In intestinal failure (IF) patients receiving home parenteral support (HPS), catheter-related bloodstream infections (CRBSIs) frequently result in replacement of their tunneled central venous catheters (CVCs), which may lead to future loss of central venous access. Objective: This observational study investigated the consequences of a catheter-salvage strategy related to CRBSIs. Design: All CRBSIs from 2002 to 2016 in the Copenhagen IF and microbiological databases were retrospectively analyzed...
May 1, 2018: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/29720673/spectrum-of-antibacterial-activity-and-mode-of-action-of-a-novel-tris-stilbene-bacteriostatic-compound
#18
Nikki Y T Man, Daniel R Knight, Scott G Stewart, Allan J McKinley, Thomas V Riley, Katherine A Hammer
The spectrum of activity and mode of action of a novel antibacterial agent, 135C, was investigated using a range of microbiological and genomic approaches. Compound 135C was active against Gram-positive bacteria with MICs for Staphylococcus aureus ranging from 0.12-0.5 μg/ml. It was largely inactive against Gram-negative bacteria. The compound showed bacteriostatic activity in time-kill studies and did not elicit bacterial cell leakage or cell lysis. Checkerboard assays showed no synergy or antagonism when 135C was combined with a range of other antibacterials...
May 2, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29714149/mupirocin-resistance-among-methicillin-resistant-staphylococcus-isolates-in-a-tertiary-health-care-center
#19
Seema Mittal, Pallavi Sayal
INTRODUCTION-Antibiotics have revolutionized medicine in many respects and countless lives have been saved, their discovery was a turning point in human history. Regrettably, the use of these wonder drugs has been accompanied by the rapid appearance of resistant strains. AIMS &OBJECTIVES-This study was carried out to with the aim to determine the rates of high-level and low-level mupirocin resistance in MRSA, to study the antimicrobial resistance pattern of mupirocin-resistant MRSA and mupirocin-sensitive MRSA...
April 30, 2018: Infectious Disorders Drug Targets
https://www.readbyqxmd.com/read/29709404/microbiology-of-french-military-casualties-repatriated-from-overseas-for-an-open-traumatic-injury
#20
S Larréché, A Bousquet, C Soler, C Mac Nab, D de Briel, D Delaune, C Bigaillon, P Pasquier, C Dubost, T Demoures, B Malgras, S Ausset, S de Rudnicki, T Leclerc, B de Loynes, S Bonnet, N Mocellin, C Ficko, R Haus, O Hersan, S Rigal, A Mérens
BACKGROUND: This study aimed to describe the microbiological epidemiology of repatriated French soldiers with an open traumatic injury, and to measure the proportion of multidrug-resistant bacteria (MDRB). METHODS: Retrospective study including all French soldiers repatriated in 2011 and 2012 in Parisian military hospitals for open traumatic injury. Results of clinical samples and MDRB screening were collected. The antibiotic susceptibility was assessed using the agar disk diffusion method...
April 27, 2018: Médecine et Maladies Infectieuses
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