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Anidulafungin

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https://www.readbyqxmd.com/read/29311065/in-vitro-and-in-vivo-evaluation-of-the-antifungal-activity-of-apx001a-apx001-against-candida-auris
#1
Christopher L Hager, Emily L Larkin, Lisa Long, Fatima Z Abidi, Karen J Shaw, Mahmoud A Ghannoum
Candida auris is an emerging multidrug-resistant yeast that has been responsible for invasive infections associated with high morbidity and mortality. C. auris strains often demonstrate high fluconazole and amphotericin B minimum inhibitory concentration values, and some strains are resistant to all 3 major antifungal classes. Here we evaluated the susceptibility of 16 C. auris clinical strains, isolated from a wide geographical area, to 10 antifungal agents including APX001A, a novel agent that inhibits the fungal protein Gwt1 (GPI-anchored wall transfer protein 1)...
January 8, 2018: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29311063/mutant-prevention-concentration-and-mutant-selection-window-of-micafungin-and-anidulafungin-in-clinical-candida-glabrata-isolates
#2
María Ángeles Bordallo-Cardona, Laura Judith Marcos-Zambrano, Carlos Sánchez-Carrillo, Elia Gómez G de la Pedrosa, Rafael Cantón, Emilio Bouza, Pilar Escribano, Jesús Guinea
Background: We report the mutant prevention concentration (MPC) and mutant selection window (MSW) for micafungin and anidulafungin administered to treat Candida glabrata We also determine the mutation frequency.Methods: We studied 20 echinocandin-susceptible, fluconazole-intermediate, and FKS wild-type C. glabrata isolates. Adjusted inocula were stroked directly onto Sabouraud agar plates containing different concentrations of micafungin or anidulafungin and visually inspected daily for up to 5 days of incubation...
January 8, 2018: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29310582/identification-of-uncommon-oral-yeasts-from-cancer-patients-by-maldi-tof-mass-spectrometry
#3
Narges Aslani, Ghasem Janbabaei, Mahdi Abastabar, Jacques F Meis, Mahasti Babaeian, Sadegh Khodavaisy, Teun Boekhout, Hamid Badali
BACKGROUND: Opportunistic infections due to Candida species occur frequently in cancer patients because of their inherent immunosuppression. The aim of the present study was to investigate the epidemiology of yeast species from the oral cavity of patients during treatment for oncological and haematological malignancies. METHODS: MALDI-TOF was performed to identify yeasts isolated from the oral cavity of 350 cancer patients. Moreover, antifungal susceptibility testing was performed in according to CLSI guidelines (M27-A3)...
January 8, 2018: BMC Infectious Diseases
https://www.readbyqxmd.com/read/29304211/we-can-do-better-a-fresh-look-at-echinocandin-dosing
#4
Justin C Bader, Sujata M Bhavnani, David R Andes, Paul G Ambrose
First-line antifungal therapies are limited to azoles, polyenes and echinocandins, the former two of which are associated with high occurrences of severe treatment-emergent adverse events or frequent drug interactions. Among antifungals, echinocandins present a unique value proposition given their lower rates of toxic events as compared with azoles and polyenes. However, with the emergence of echinocandin-resistant Candida species and the fact that a pharmacometric approach to the development of anti-infective agents was not a mainstream practice at the time these agents were developed, we question whether echinocandins are being dosed optimally...
January 1, 2018: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/29290374/physical-compatibility-of-meropenem-and-vaborbactam-with-select-intravenous-drugs-during-simulated-y-site-administration
#5
James M Kidd, Lindsay M Avery, Tomefa E Asempa, David P Nicolau, Joseph L Kuti
PURPOSE: Meropenem/vaborbactam is a novel intravenous antibiotic combining the carbapenem, meropenem, with a novel β-lactamase inhibitor, vaborbactam. Meropenem/vaborbactam is administered as a 3-hour infusion given every 8 hours, thereby potentially restricting an intravenous line for 9 h/d. Intravenous medications may be given concurrently via Y-site when compatibility data are available. Herein, physical compatibility was determined for the identification which medications can be coadministered with meropenem/vaborbactam via Y-site...
December 28, 2017: Clinical Therapeutics
https://www.readbyqxmd.com/read/29273611/physical-compatibility-of-fosfomycin-for-injection-with-select-i-v-drugs-during-simulated-y-site-administration
#6
Marguerite L Monogue, Safa S Almarzoky Abuhussain, Joseph L Kuti, David P Nicolau
PURPOSE: The results of a study to determine the physical compatibility of ZTI-01 (fosfomycin for injection) in 0.9% sodium chloride or 5% dextrose during simulated Y-site administration with 37 i.v. antimicrobials and 58 nonantimicrobials are reported. METHODS: Fosfomycin, an epoxide antibiotic with broad-spectrum activity against multidrug-resistant bacteria, is marketed in the United States only in an oral formulation with limited bioavailability, but an i.v...
January 1, 2018: American Journal of Health-system Pharmacy: AJHP
https://www.readbyqxmd.com/read/29228268/low-and-constant-micafungin-concentrations-may-be-sufficient-to-lead-to-resistance-mutations-in-fks2-gene-of-candida-glabrata
#7
María Ángeles Bordallo-Cardona, Pilar Escribano, Laura Judith Marcos-Zambrano, Judith Díaz-García, Elia Gómez de la Pedrosa, Rafael Cantón, Emilio Bouza, Jesús Guinea
We studied the ability of five echinocandin-susceptible C. glabrata isolates to acquire in vitro resistance to anidulafungin and micafungin. All isolates became phenotypically resistant after 2-4 days of exposure to low and constant micafungin concentrations (P < .05). Mutations in the HS1 region of the FKS2 gene were found in all isolates. The acquisition of resistance was not related to the previous use of antifungal treatment in the patients or the presence of mutations at MSH2 gene. We found differences (P < ...
December 8, 2017: Medical Mycology: Official Publication of the International Society for Human and Animal Mycology
https://www.readbyqxmd.com/read/29203491/chemogenomic-profiling-of-the-fungal-pathogen-candida-albicans
#8
Yaolin Chen, Jaideep Mallick, Alaa Maqnas, Yuan Sun, Baharul I Choudhury, Pierre Cote, Lan Yan, Ting-Jun-Hong Ni, Yan Li, Dazhi Zhang, Roberto Rodríguez-Ortiz, Quan-Zhen Lv, Yuan-Ying Jiang, Malcolm Whiteway
There are currently a small number of classes of antifungal drugs, and these drugs are known to target a very limited set of cellular functions. We derived a set of approximately 900 non-essential, transactivator-defective disruption strains from the tetracycline regulated GRACE strain collection of the fungal pathogen Candida albicans This strain set was screened against classic antifungal drugs to identify gene inactivations that conferred either enhanced sensitivity or increased resistance to the compounds...
December 4, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29183771/comparative-study-for-147-candida-spp-identification-and-echinocandins-susceptibility-in-isolates-obtained-from-blood-cultures-in-15-hospitals-medellin-colombia
#9
Indira Berrio, Natalia Maldonado, Catalina De Bedout, Karen Arango, Luz Elena Cano, Yorlady Valencia, Cristina Jiménez-Ortigosa, David S Perlin, Beatriz L Gómez, Carlos Robledo, Jaime Robledo
INTRODUCTION: Invasive candidiasis has high impact on morbidity and mortality in hospitalized patients. Accurate and timely methods for identification of Candida species and determination of equinocandins susceptibility become a priority for laboratories of clinical microbiology. METHODS: A study was performed to compare MALDI-TOF MS identification to sequencing of D1/D2 region of rRNA gene complex 28 subunit, in 147 isolates obtained from patients with candidemia...
November 25, 2017: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/29172033/in-vitro-antifungal-susceptibility-of-clinical-and-environmental-isolates-of-aspergillus-fumigatus-and-aspergillus-flavus-in-brazil
#10
Laura Bedin Denardi, Bianca Hoch Dalla-Lana, Francielli Pantella Kunz de Jesus, Cecília Bittencourt Severo, Janio Morais Santurio, Régis Adriel Zanette, Sydney Hartz Alves
The in vitro susceptibility of 105 clinical and environmental strains of Aspergillus fumigatus and Aspergillus flavus to antifungal drugs, such as amphotericin B, azoles, and echinocandins was evaluated by the broth microdilution method proposed by the European Committee on Antimicrobial Susceptibility Testing (EUCAST). Following the EUCAST-proposed breakpoints, 20% and 25% of the clinical and environmental isolates of A. fumigatus, respectively, were found to be resistant to itraconazole (Minimal Inhibitory Concentration, MIC>2...
November 21, 2017: Brazilian Journal of Infectious Diseases
https://www.readbyqxmd.com/read/29133157/microbiological-and-clinical-characteristics-of-biofilm-forming-candida-parapsilosis-isolates-associated-with-fungaemia-and-their-impact-on-mortality
#11
Silvia Soldini, Brunella Posteraro, Antonietta Vella, Elena De Carolis, Elisa Borghi, Monica Falleni, Angela Raffaella Losito, Giuseppe Maiuro, Enrico Maria Trecarichi, Maurizio Sanguinetti, Mario Tumbarello
OBJECTIVES: Biofilm formation (BF) by fungal isolates may dramatically complicate infection. We determined the ability of C. parapsilosis isolates from single fungaemia episodes to form biofilms and we analysed biofilm subgroups for antifungal susceptibility and pathogenic potential. We then correlated BF with clinical characteristics and outcomes of the episodes. METHODS: BF was measured using the crystal-violet biomass assay, antifungal susceptibility of preformed biofilms was assessed, and virulence was studied using the Galleria mellonella model...
November 10, 2017: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/29126660/evaluation-of-the-efficacy-of-a-posaconazole-and-anidulafungin-combination-in-a-murine-model-of-pulmonary-aspergillosis-due-to-infection-with-aspergillus-fumigatus
#12
Laura Bedin Denardi, Francielli Pantella Kunz de Jesus, Jéssica Tairine Keller, Carla Weiblen, Maria Isabel de Azevedo, Vanessa Oliveira, Janio Morais Santurio, Sydney Hartz Alves
Posaconazole (PSC) in combination with anidulafungin (AFG) was evaluated in a murine model of pulmonary aspergillosis. Immunosuppressed animals were infected via the nasal cavity with 2 different A. fumigatus strains. The animals received PSC (oral, 20mg/kg per day) and/or AFG (i.p., 10mg/kg per day) for 7days. On Day 8, the mice were euthanized and fungal burdens were determined from the lungs. Survival curves were constructed for mortality analysis. Compared to untreated groups, groups singly treated with PSC or AFG showed a reduced fungal burden in the lungs (P=0...
October 12, 2017: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/29104569/a-linear-19-mer-plant-defensin-derived-peptide-acts-synergistically-with-caspofungin-against-candida-albicans-biofilms
#13
Tanne L Cools, Caroline Struyfs, Jan W Drijfhout, Soňa Kucharíková, Celia Lobo Romero, Patrick Van Dijck, Marcelo H S Ramada, Carlos Bloch, Bruno P A Cammue, Karin Thevissen
Public health problems are associated with device-associated biofilm infections, with Candida albicans being the major fungal pathogen. We previously identified potent antibiofilm combination treatment in which the antifungal plant defensin HsAFP1 is co-administered with caspofungin, the preferred antimycotic to treat such infections. In this study, we identified the smallest linear HsAFP1-derived peptide that acts synergistically with caspofungin or anidulafungin against C. albicans as HsLin06_18, a 19-mer peptide derived from the C-terminal part of HsAFP1...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29103728/short-communication-cold-atmospheric-plasma-inactivation-of-prototheca-zopfii-isolated-from-bovine-milk
#14
E Tyczkowska-Sieron, J Markiewicz, B Grzesiak, H Krukowski, A Glowacka, J Tyczkowski
Mastitis is a serious bovine diseases that can be caused by Prototheca zopfii, yeast-like algae belonging to the family Chlorellaceae. The substantial economic losses and health damage associated with bovine mastitis emphasize the need to develop effective strategies aimed at control of the infection. Unfortunately, P. zopfii is highly resistant to most common antibacterial and antifungal agents, as well as to heat treatment. We report here the first attempt to use cold atmospheric plasma to inactivate this pathogen...
November 2, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/29062248/evaluation-of-candida-species-and-antifungal-susceptibilities-among-children-with-invasive-candidiasis
#15
Murat Sütçü, Manolya Acar, Gonca Erköse Genç, İlknur Kökçü, Hacer Aktürk, Gürkan Atay, Selda Hançerli Törun, Nuran Salman, Zayre Erturan, Ayper Somer
AIM: Non-albicans Candida species and resistant microorganisms have been more commonly isolated in invasive candidiasis in recent years. The aim of this study was to evaluate the distrubution of Candida spp and antifungal resistance in our clinic. MATERIAL AND METHODS: Fifty-four Candida isolates and antifungal susceptibility results obtained from patients diagnosed as having invasive candidiasis between December 2012 and June 2016 were included. Clinical and laboratory data were retrospectively analyzed...
September 2017: Türk Pediatri Arşivi
https://www.readbyqxmd.com/read/29048702/time-kill-assays-of-amphotericin-b-plus-anidulafungin-against-candida-tropicalis-biofilms-formed-on-two-different-biomaterials
#16
Marcelo E Fernández-Rivero, José L Del Pozo, Paula Ramírez, Eulogio Valentín, Alba Ruiz-Gaitán, Javier Pemán, Emilia Cantón
PURPOSE: To determine the fungicidal activity by time-killing assays of amphotericin B (AMB) combined with anidulafungin (ANF) against biofilms of 2 clinical isolates of Candida tropicalis and the reference strain ATCC® 750, developed on polytetrafluoroethylene (PTFE) and titanium, using the CDC Biofilm Reactor (CBR) as an in vitro model. METHODS: Biofilms were developed for 24 hours on the disk surfaces and then exposed to AMB (40 mg/L), ANF (8 mg/L), alone and combined...
October 18, 2017: International Journal of Artificial Organs
https://www.readbyqxmd.com/read/29038263/in-vitro-combination-of-isavuconazole-with-echinocandins-against-azole-susceptible-and-resistant-aspergillus-spp
#17
A Raffetin, V Courbin, V Jullien, E Dannaoui
The in vitro combinations of isavuconazole with echinocandins were evaluated against 30 Aspergillus spp. by a two-dimensional checkerboard microdilution method and an agar-based diffusion method. With the checkerboard method, the three combinations showed indifferent interactions for all the strains. With the agar-based method, indifferent interactions were found for all the strains for isavuconazole-micafungin and isavuconazole-anidulafungin. For the isavuconazole-caspofungin combination, indifference was found in 24/30 strains, synergy in 4/30 strains, and antagonism in 2/30 strains...
October 16, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29027687/filter-adsorption-of-anidulafungin-to-a-polysulfone-based-hemofilter-during-cvvhd-in-vitro
#18
Peter Kolbinger, Michael Gruber, Gabriel Roth, Bernhard M Graf, Karl-Peter Ittner
Candidemia is frequent in critically ill patients, especially in combination with an acute kidney injury (AKI). Echinocandins generally are recommended for therapy of such infections. Recent studies found no need for dosage adjustment in patients with end-stage renal disease receiving hemodialysis, or patients with AKI receiving continuous venovenous hemofiltration. The aim of this in vitro study was to examine the adsorption of anidulafungin to the surface of the hemofilter during continuous venovenous hemodialysis (CVVHD) and its effect on anidulafungin concentrations...
October 13, 2017: Artificial Organs
https://www.readbyqxmd.com/read/28994001/comparison-between-etest-and-broth-microdilution-methods-for-testing-itraconazole-resistant-aspergillus-fumigatus-susceptibility-to-antifungal-combinations
#19
Laura Bedin Denardi, Jéssica Tairine Keller, Maria Isabel de Azevedo, Vanessa Oliveira, Fernanda Baldissera Piasentin, Cecília Bittencourt Severo, Janio Morais Santurio, Sydney Hartz Alves
The checkerboard broth microdilution assay (BMD) is the most frequently used method for the in vitro evaluation of drug combinations. However, its use to evaluate the effect of antifungal drugs on filamentous fungi is sometimes associated with endpoint-reading difficulties, and different degrees of interaction are assigned to the same drug combination. We evaluated combinations of the azoles, itraconazole, posaconazole, and voriconazole, with the echinocandins, anidulafungin, caspofungin, and micafungin, against 15 itraconazole-resistant Aspergillus fumigatus clinical strains via the checkerboard BMD and Etest assay...
October 9, 2017: Mycopathologia
https://www.readbyqxmd.com/read/28992116/in-vitro-activity-of-echinocandins-against-562-clinical-yeast-isolates-from-a-romanian-multicentre-study
#20
Mihai Mares, Bogdan Minea, Valentin Nastasa, Irina Rosca, Andra-Cristina Bostanaru, Iosif Marincu, Vasilica Toma, Violeta Corina Cristea, Carmen Murariu, Mariana Pinteala
The study presents the echinocandin susceptibility profile of a multi-centre collection of pathogenic yeast isolates from Romanian tertiary hospitals. The 562 isolates were identified using ID32C strips, MALDI-TOF MS and DNA sequencing. Minimal inhibitory concentrations (MICs) of caspofungin (CAS), micafungin (MCA), and anidulafungin (ANI) were assessed and interpreted according to EUCAST guidelines. Minimal fungicidal concentrations (MFC) were determined by plating content from the clear MIC wells. The activity was considered fungicidal at MFC/MIC ≤ 4...
August 4, 2017: Medical Mycology: Official Publication of the International Society for Human and Animal Mycology
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