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https://www.readbyqxmd.com/read/28214273/candidaemia-due-to-candida-parapsilosis-species-complex-at-a-hospital-in-brazil-clinical-characteristics-and-antifungal-susceptibility-profile
#1
Débora de Souza Olartechea de Alencar, Rosianne Assis de Sousa Tsujisaki, Fernanda Luiza Espinosa Spositto, Maína de Oliveira Nunes, Adriana Araújo de Almeida, Marilena Dos Anjos Martins, Marcia de Souza Carvalho Melhem, Marilene Rodrigues Chang
BACKGROUND: Recent decades have seen a global emergence of candidaemia caused by non-Candida albicans Candida species, particularly the Candida parapsilosis complex. AIMS: To evaluate the clinical features and antifungal susceptibility profiles of isolates belonging to the C. parapsilosis species complex in patients with candidaemia in a midwestern Brazilian tertiary-care teaching hospital. METHODS: Yeast identification was performed using an automated Vitek 2 Compact system...
February 14, 2017: Revista Iberoamericana de Micología
https://www.readbyqxmd.com/read/28213532/susceptibility-and-pk-pd-relationships-of-staphylococcus-aureus-strains-from-ovine-and-caprine-with-clinical-mastitis-against-five-veterinary-fluoroquinolones
#2
J M Serrano-Rodríguez, C Cárceles-García, C M Cárceles-Rodríguez, M L Gabarda, J M Serrano-Caballero, E Fernández-Varón
Minimum inhibitory concentration (MIC) and mutant prevention concentration (MPC) of veterinary fluoroquinolones as enrofloxacin, its metabolite ciprofloxacin, danofloxacin, difloxacin and marbofloxacin against Staphylococcus aureus strains (n=24) isolated from milk of sheep and goats affected by clinical mastitis were evaluated. The authors have used the MIC and MPC, as well as the pharmacokinetic-pharmacodynamic relationships in plasma and milk. MIC values were significantly different between drugs, unlike MPC values...
February 17, 2017: Veterinary Record
https://www.readbyqxmd.com/read/28213226/a-feasible-method-for-indirect-quantification-of-l-t4-in-drugs-by-iodine-determination
#3
Marcia Foster Mesko, Alessandra Cortes Teotonio, Dirce Taina Teixeira Oliveira, Diogo La Rosa Novo, Vanize Caldeira Costa
In this work, a method combining microwave-induced combustion (MIC) for sample preparation of commercial levothyroxine sodium (L-T4) drugs (L-T4: 25-200µg/tablet), and potentiometry with ion selective electrode (ISE) for iodine determination and subsequent indirect quantification of L-T4 was proposed. The type and concentration of the absorbing solution were evaluated to select the most suitable conditions for this study. Using the MIC method, it was possible to use solutions as diluted as 150mmolL(-1) (NH4)2CO3 (for samples containing 25-200µg of L-T4/tablet) for I absorption...
May 1, 2017: Talanta
https://www.readbyqxmd.com/read/28209130/determination-of-antibacterial-activity-and-minimum-inhibitory-concentration-of-larval-extract-of-fly-via-resazurin-based-turbidometric-assay
#4
Chien Huey Teh, Wasi Ahmad Nazni, Ab Hamid Nurulhusna, Ahmad Norazah, Han Lim Lee
BACKGROUND: Antimicrobial resistance is currently a major global issue. As the rate of emergence of antimicrobial resistance has superseded the rate of discovery and introduction of new effective drugs, the medical arsenal now is experiencing shortage of effective drugs to combat diseases, particularly against diseases caused by the dreadful multidrug-resistant strains, such as the methicillin-resistant Staphylococcus aureus (MRSA). The ability of fly larvae to thrive in septic habitats has prompted us to determine the antibacterial activity and minimum inhibitory concentrations (MICs) of larval extract of flies, namely Lucilia cuprina, Sarcophaga peregrina and Musca domestica against 4 pathogenic bacteria [Staphylococcus aureus, methicillin-resistant S...
February 16, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28198919/natural-compounds-from-mexican-medicinal-plants-as-potential-drug-leads-for-anti-tuberculosis-drugs
#5
Rocio Gómez-Cansino, Silvia Laura Guzmán-Gutiérrez, María Guadalupe Campos-Lara, Clara Ines Espitia-Pinzón, Ricardo Reyes-Chilpa
In Mexican Traditional Medicine 187 plant species are used in the treatment of respiratory conditions that may be associated with tuberculosis. In this contribution, we review the ethnobotany, chemistry and pharmacology of 63 species whose extracts have been assayed for antimycobacterial activity in vitro. Among these, the most potent is Aristolochia brevipes (MIC= 12.5 µg/mL), followed by Aristolochia taliscana, Citrus sinensis, Chrysactinia mexicana, Persea americana, and Olea europaea (MIC<64 µg/mL)...
February 9, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28198097/inibitory-effects-of-linalool-on-fungal-pathogenicity-of-clinical-isolates-of-microsporum-canis-and-microsporum-gypseum
#6
Kaltz V S Silva, Maria I O Lima, Gustavo N Cardoso, Aldeir S Santos, Gezaíldo S Silva, Fillipe O Pereira
In humans worldwide, Microsporum sp. is a frequent agent of dermatophytsosis. When considering the emergence of resistant fungi and the clinical relevance of dermatophytosis, terpene antifungal activity is of great interest. Linalool is a monoterpene alcohol with pharmacological properties. In this study, antifungal in vitro activity of linalool and ketoconazole (as a positive control) were evaluated against clinical isolates of M. canis and M. gypseum. The minimum inhibitory concentration (MIC) and minimum fungicidal concentration (MFC) of each drug were determined by broth microdilution...
February 15, 2017: Mycoses
https://www.readbyqxmd.com/read/28196957/a-novel-small-molecule-inhibitor-of-the-mycobacterium-tuberculosis-demethylmenaquinone-methyltransferase-meng-is-bactericidal-to-both-growing-and-nutritionally-deprived-persister-cells
#7
Paridhi Sukheja, Pradeep Kumar, Nisha Mittal, Shao-Gang Li, Eric Singleton, Riccardo Russo, Alexander L Perryman, Riju Shrestha, Divya Awasthi, Seema Husain, Patricia Soteropoulos, Roman Brukh, Nancy Connell, Joel S Freundlich, David Alland
Active tuberculosis (TB) and latent Mycobacterium tuberculosis infection both require lengthy treatments to achieve durable cures. This problem has partly been attributable to the existence of nonreplicating M. tuberculosis "persisters" that are difficult to kill using conventional anti-TB treatments. Compounds that target the respiratory pathway have the potential to kill both replicating and persistent M. tuberculosis and shorten TB treatment, as this pathway is essential in both metabolic states. We developed a novel respiratory pathway-specific whole-cell screen to identify new respiration inhibitors...
February 14, 2017: MBio
https://www.readbyqxmd.com/read/28193651/in-vivo-pharmacodynamic-evaluation-of-omadacycline-ptk-0796-against-streptococcus-pneumoniae-in-the-murine-pneumonia-model
#8
Alexander J Lepak, Miao Zhao, Karen Marchillo, Jamie VanHecker, David R Andes
Omadacycline is a novel aminomethylcylcine antibiotic in clinical development for community acquired bacterial pneumonia (CABP). We used a neutropenic murine pneumonia infection model to characterize the in vivo pharmacodynamic activity of omadacycline against Streptococcus pneumoniae Four strains with varying phenotypic resistance to other antimicrobials including tetracyclines were utilized. Drug concentration measurements were performed in the plasma and epithelial lining fluid (ELF) after administration of 0...
February 13, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28191309/co-existence-of-blaoxa-23-and-blandm-1-genes-of-acinetobacter-baumannii-isolated-from-nepal-antimicrobial-resistance-and-clinical-significance
#9
Prabhu Raj Joshi, Mahesh Acharya, Trishna Kakshapati, Udomluk Leungtongkam, Rapee Thummeepak, Sutthirat Sitthisak
BACKGROUND: Molecular analysis of carbapenem-resistant genes in Acinetobacter baumannii, an emerging pathogen, is less commonly reported from Nepal. In this study we determined the antibiotic susceptibility profile and genetic mechanism of carbapenem resistance in clinical isolates of A. baumannii. METHODS: A. baumannii were isolated from various clinical specimens and identified based on Gram staining, biochemical tests, and PCR amplification of organism specific 16S rRNA and blaOXA-51 genes...
2017: Antimicrobial Resistance and Infection Control
https://www.readbyqxmd.com/read/28188880/comparison-of-clostridium-difficile-minimum-inhibitory-concentrations-obtained-using-agar-dilution-vs-broth-microdilution-methods
#10
Christine J Hastey, Suzanne E Dale, Julia Nary, Diane Citron, Jennifer H Law, Darcie E Roe-Carpenter, Laurent Chesnel
Due to increasing antibiotic resistance among anaerobic bacteria, routine antimicrobial susceptibility testing is recommended by the Clinical and Laboratory Standards Institute (CLSI). This study compared the minimum inhibitory concentrations (MICs) from 920 Clostridium difficile isolates tested against seven antimicrobial agents using the two current CLSI reference methodologies, agar dilution method, vs broth microdilution method. A subset of isolate testing was performed independently by two laboratories to evaluate reproducibility...
February 7, 2017: Anaerobe
https://www.readbyqxmd.com/read/28185538/synthesis-and-biological-evaluation-of-hybrid-1-5-and-2-5-disubstituted-indoles-as-potentially-new-antitubercular-agents
#11
Ana Soares, Mónica S Estevão, M Manuel B Marques, Vasily Kovalishyn, Diogo A R S Latino, João Aires-de-Sousa, Jorge Ramos, Miguel Viveiros, Filomena Martins
BACKGROUND: Tuberculosis (TB) is the second leading cause of mortality worldwide being a highly contagious and insidious illness caused by Mycobacterium tuberculosis, Mtb. Additionally, the emergence of multidrug-resistant and extensively drug-resistant strains of Mtb, together with significant levels of co-infection with HIV and TB (HIV/TB) makes the search for new antitubercular drugs urgent and challenging. METHODS: This work was based on the hypothesis that an active compound could be obtained if substituents present in some other active compounds were attached on a core of an important structure, in this case the indole scaffold, thus generating a hybrid compound...
February 9, 2017: Medicinal Chemistry
https://www.readbyqxmd.com/read/28181300/synthesis-and-characterization-of-cefotaxime-conjugated-gold-nanoparticles-and-their-use-to-target-drug-resistant-ctx-m-producing-bacterial-pathogens
#12
Sibhghatulla Shaikh, Syed Mohd Danish Rizvi, Shazi Shakil, Talib Hussain, Thamir M Alshammari, Waseem Ahmad, Shams Tabrez, Mohammad H Al-Qahtani, Adel M Abuzenadah
Multidrug-resistance due to 'β lactamases having the expanded spectrum' (ESBLs) in members of Enterobacteriaceae is a matter of continued clinical concern. CTX-M is among the most common ESBLs in Enterobacteriaceae family. In the present study, a nanoformulation of cefotaxime was prepared using gold nanoparticles to combat drug-resistance in ESBL producing strains. Here, two CTX-M-15 positive cefotaxime resistant bacterial strains (i.e. one Escherichia coli and one Klebsiella pneumoniae strain) were used for testing the efficacy of 'cefotaxime loaded gold-nanoparticles'...
February 9, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28176951/in-vitro-and-in-vivo-evaluation-of-biologically-synthesized-silver-nanoparticles-for-topical-applications-effect-of-surface-coating-and-loading-into-hydrogels
#13
Aml I Mekkawy, Mohamed A El-Mokhtar, Nivien A Nafady, Naeima Yousef, Mostafa A Hamad, Sohair M El-Shanawany, Ehsan H Ibrahim, Mahmoud Elsabahy
In the present study, silver nanoparticles (AgNPs) were synthesized via biological reduction of silver nitrate using extract of the fungus Fusarium verticillioides (green chemistry principle). The synthesized nanoparticles were spherical and homogenous in size. AgNPs were coated with polyethylene glycol (PEG) 6000, sodium dodecyl sulfate (SDS), and β-cyclodextrin (β-CD). The averaged diameters of AgNPs were 19.2±3.6, 13±4, 14±4.4, and 15.7±4.8 nm, for PEG-, SDS-, and β-CD-coated and uncoated AgNPs, respectively...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28173648/-antibiotic-resistance-analysis-of-streptococcus-pneumoniae-isolates-from-the-hospitalized-children-in-shanxi-children-s-hospital-from-2012-to-2014
#14
L L Ge, Z Y Han, A H Liu, L Zhu, J H Meng
Objective: To investigate the antibiotic resistance status of Streptococcus pneumoniae isolates from hospitalized children in Shanxi Children's Hospital. Method: E-test and Kirby-Bauer methods were applied to determine drug sensitivity of the isolates collected from the body fluid specimens of hospitalized children in Shanxi Children's Hospital from January 2012 to December 2014. The antimicrobial sensitivity and minimum inhibitory concentration (MIC) of Streptococcus pneumoniae to the conventional antibiotics were analyzed, in order to compare the annual trends of non-invasive isolates, while the differentiation of sensitivity from specimens...
February 2, 2017: Zhonghua Er Ke za Zhi. Chinese Journal of Pediatrics
https://www.readbyqxmd.com/read/28168884/population-pharmacokinetics-and-pharmacodynamics-of-doripenem-in-obese-hospitalized-patients
#15
Eun Kyoung Chung, Megan R Fleming, S Christian Cheatham, Michael B Kays
BACKGROUND: Doripenem population pharmacokinetics and dosing recommendations are limited in obesity. OBJECTIVE: To evaluate the population pharmacokinetics and pharmacodynamics of doripenem in obese patients. METHODS: Hospitalized adults with a body mass index (BMI) ≥ 40 kg/m(2) or total body weight (TBW) ≥45.5 kg over their ideal body weight received doripenem 500 mg every 8 hours, infused over 1 hour. Population pharmacokinetic analyses were performed using NONMEM, and Monte Carlo simulations were performed for 5 intermittent and prolonged infusion dosing regimens to calculate probability of target attainment (PTA) at 40% and 100% fT>MIC (free drug concentrations above the minimum inhibitory concentration)...
March 2017: Annals of Pharmacotherapy
https://www.readbyqxmd.com/read/28167856/prevalence-of-high-level-gentamicin-resistant-enterococcus-faecalis-and-enterococcus-faecium-in-an-iranian-hospital
#16
M Emaneini, B Khoramian, F Jabalameli, R Beigverdi, K Asadollahi, M Taherikalani, A R Lari
This study was designed to determine the molecular characteristics and antimicrobial resistance of enterococcal strains isolated from patients admitted to an Iranian Hospital. Enterococcal strains were isolated from the burn patients. All strains were screened for genes encoding resistance to aminoglycoside [aac(6')-Ie-aph(2'')-Ia, aph (3'), ant (4')], resistance to vancomycin (vanA, vanB), resistance to tetracycline (tetK, tetL, tetM, tetO), and resistance to erythromycin (ermA, ermB, ermC) by PCR and multiplex PCR-based methods...
December 2016: Journal of Preventive Medicine and Hygiene
https://www.readbyqxmd.com/read/28167553/troponoids-can-inhibit-growth-of-the-human-fungal-pathogen-cryptococcus-neoformans
#17
Maureen J Donlin, Anthony Zunica, Ashlyn Lipnicky, Aswin K Garimallaprabhakaran, Alex J Berkowitz, Alexandre Grigoryan, Marvin J Meyers, John E Tavis, Ryan P Murelli
Cryptococcus neoformans is a common pathogen of the immunosuppressed. It can be treated with amphotericin B and fluconazole, but the mortality rate remains 15-30%, thus novel and more effective anti-cryptococcal therapies are needed. The troponoids are based on natural products isolated from Western redcedar and have broad antimicrobial activity. Extracts of Western redcedar inhibit growth of several fungal species, but neither Western redcedar extracts nor troponoid derivatives have been tested against C. neoformans...
February 6, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28167307/fosfomycin-in-vitro-efficacy-against-multidrug-resistant-isolates-beyond-urinary-isolates
#18
Tulin Demir, Tuncay Buyukguclu
OBJECTIVES: Fosfomycin (FOF) is a bactericidal antimicrobial agent active against a range of Gram-negative bacteria, including multidrug-resistant (MDR) and metallo-β-lactamase (MBL)-producing Enterobacteriaceae. However, data are scarce regarding use of the drug beyond urinary tract infections (UTIs). METHODS: In this study, susceptibility rates to FOF among 290 MDR Enterobacteriaceae isolates were analysed by gradient and disk diffusion tests and the results were compared with agar dilution according to the Clinical and Laboratory Standards Institute (CLSI)...
February 3, 2017: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/28164737/anti-helicobacter-pylori-and-antiulcerogenic-activity-of-aframomum-pruinosum-seeds-on-indomethacin-induced-gastric-ulcer-in-rats
#19
Laure Brigitte Kouitcheu Mabeku, Blandine Nanfack Nana, Bertrand Eyoum Bille, Roland Tchuenteu Tchuenguem, Eveline Nguepi
CONTEXT: Peptic ulcer is one of the most common diseases affecting mankind. Although there are many products used for its treatment, most of these products produce severe adverse reactions requiring the search for novel compounds. Some Afromomum species are used traditionally to cure acute gastritis. OBJECTIVE: To evaluate the antiulcer activity of the methanol extract of Aframomum pruinosum Gagnepain (Zingiberaceae) seeds against two major etiologic agents of peptic ulcer disease; Helicobacter pylori and non-steroidal anti-inflammatory drugs...
December 2017: Pharmaceutical Biology
https://www.readbyqxmd.com/read/28162962/in-vitro-synergistic-antibacterial-activity-of-the-essential-oil-from-zingiber-cassumunar-roxb-against-extensively-drug-resistant-acinetobacter-baumannii-strains
#20
Wongwarut Boonyanugomol, Kairin Kraisriwattana, Kamolchanok Rukseree, Kraisorn Boonsam, Panchaporn Narachai
In this study, we determined the antibacterial and synergistic activities of the essential oil from Zingiber cassumunar against the extensively drug-resistant (XDR) Acinetobacter baumannii strains. The antibacterial and synergistic properties of the essential oil from Z. cassumunar were examined by agar disc diffusion tests. The minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) were evaluated by broth microdilution using the resazurin assay. The in vitro time-kill antibacterial kinetics was analyzed using the plate count technique...
February 2, 2017: Journal of Infection and Public Health
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