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Antifungal resistance in Candida spp.

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https://www.readbyqxmd.com/read/28303122/antifungal-drug-susceptibility-of-candida-species-isolated-from-hiv-positive-patients-recruited-at-a-public-hospital-in-s%C3%A3-o-lu%C3%A3-s-maranh%C3%A3-o-brazil
#1
Ana L G Terças, Sirlei G Marques, Eduardo B Moffa, Márcia B Alves, Conceição M P S de Azevedo, Walter L Siqueira, Cristina A Monteiro
Oropharyngeal candidiasis is the most common fungal infection in hospitalized patients with acquired immune deficiency syndrome (AIDS). Its progression results in invasive infections, which are a significant cause of morbidity and mortality. This study aimed to quickly and accurately identify Candida spp. from oral mucosa of AIDS patients recruited at Presidente Vargas Hospital, in São Luís city, Brazil and to evaluate the sensitivity profile of these fungi to antifungals by using an automated system. Isolates were collected from oropharyngeal mucosa of 52 hospitalized AIDS patients, under anti-viral and antifungal therapies...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28238268/aryl-alkyl-lysines-membrane-active-fungicides-that-act-against-biofilms-of-candida-albicans
#2
Chandradhish Ghosh, Vikas Yadav, Waleed Younis, Haroon Mohammad, Youssef A Hegazy, Mohamed N Seleem, Kaustuv Sanyal, Jayanta Haldar
Mortality due to pathogenic fungi has been exacerbated by the rapid development of resistance to frontline antifungal drugs. Fungicidal compounds with novel mechanisms of action are urgently needed. Aryl-alkyl-lysines, which are membrane-active small molecules, were earlier shown to be broad-spectrum antibacterial agents with potency in vitro and in vivo. Herein, we report the antifungal properties of aryl-alkyl-lysines. After identifying the most active compound (NCK-10), we tested its activity against a panel of clinically relevant pathogenic fungi and examined NCK-10's effect against immature and mature biofilms of Candida albicans...
March 14, 2017: ACS Infectious Diseases
https://www.readbyqxmd.com/read/28195093/molecular-identification-of-candida-species-isolated-from-cases-of-neonatal-candidemia-using-polymerase-chain-reaction-restriction-fragment-length-polymorphism-in-a-tertiary-care-hospital
#3
COMPARATIVE STUDY
Akeela Fatima, Gulnaz Bashir, Tehmeena Wani, Abiroo Jan, Amrish Kohli, Mosin S Khan
CONTEXT: Candida spp. is an emerging cause of bloodstream infections worldwide. Delay in speciation of Candida isolates by conventional methods and resistance to antifungal drugs in various Candida species are responsible for the increase in morbidity and mortality due to candidemia. Hence, the rapid identification of Candida isolates is very important for the proper management of patients with candidemia. AIMS: The aim was to re-evaluate the identification of various Candida spp...
January 2017: Indian Journal of Pathology & Microbiology
https://www.readbyqxmd.com/read/28149146/antifungal-susceptibility-and-risk-factors-in-patients-with-candidemia
#4
Cigdem Mermutluoglu, Ozcan Deveci, Saim Dayan, Emel Aslan, Fatma Bozkurt, Recep Tekin
OBJECTIVE: This study aimed to investigate the antifungal susceptibility, typology, and risk factors of candidemia among adult and pediatric inpatients at a university hospital. MATERIALS AND METHODS: A case-control study was designed, and data collected between December 2013 and December 2014 were retrospectively evaluated. The case group consisted of patients with candidemia. The control group was selected from the inpatients that did not develop candidemia but were admitted in the same clinic and during the same period as the candidemia group...
October 2016: Eurasian Journal of Medicine
https://www.readbyqxmd.com/read/28138369/distribution-and-drug-susceptibility-of-candida-spp-associated-with-female-genital-tract-infection-chongqing-china
#5
Xiaodong Luo, Xiaojing Dong, Zhi Pen
BACKGROUND: Vulvovaginal candidiasis is defined as vulvovaginitis associated with vaginal carriage of Candida spp. and is a common problem with a high rate of morbidity. OBJECTIVES: To investigate the distribution of Candida spp. and evaluate the corresponding antifungal susceptibility in women with genital tract infection in Chongqing, southwestern China. PATIENTS AND METHODS: Samples (n = 2.129) were obtained from female patients with symptoms of genital tract infection...
October 2016: Jundishapur Journal of Microbiology
https://www.readbyqxmd.com/read/28094180/antifungal-activity-of-substituted-aurones
#6
Caleb L Sutton, Zachary E Taylor, Mary B Farone, Scott T Handy
Novel antifungals are in high demand as there is a growing resistance to antifungals currently in use. In particular, opportunistic fungal infections caused by Candida spp. are on the rise with infections by this genus accounting for the most severe fungal infections following chemotherapy, implantation procedures, and in patients with HIV/AIDS. A series of simple aurone analogs were synthesized and screened for antifungal activity versus Candida spp. Several compounds displayed activity at 100μM, with two having IC50 values below 20μM for three species of Candida...
January 6, 2017: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28052349/chemical-composition-and-antifungal-activity-of-carica-papaya-linn-seeds-essential-oil-against-candida-spp
#7
Xiaowen He, Yinzheng Ma, Guohui Yi, Jinyan Wu, Limin Zhou, Hong Guo
In recent years, the incidence of clinical yeast infections has increased dramatically. Due to the extensive use of broad-spectrum antifungal agents, there has been a notable increase in drug resistance among infections yeast species. As one of the most popular natural antimicrobial agents, essential oils (EOs) have attracted a lot of attention from the scientific community. The aim of this study was to analyze the chemical composition and examine the antifungal activity of the EO extracted from the seeds of Carica papaya Linn...
January 4, 2017: Letters in Applied Microbiology
https://www.readbyqxmd.com/read/28040409/antifungal-effects-of-phytocompounds-on-candida-species-alone-and-in-combination-with-fluconazole
#8
REVIEW
Mengjiao Lu, Tao Li, Jianjian Wan, Xiuyun Li, Lei Yuan, Shujuan Sun
Invasive fungal infections caused by Candida spp. remain the most predominant nosocomial fungal infections. Owing to the increased use of antifungal agents, resistance of Candida spp. to antimycotics has emerged frequently, especially to fluconazole (FLC). To cope with this issue, new efforts have been dedicated to discovering novel antimycotics or new agents that can enhance the susceptibility of Candida spp. to existing antimycotics. The secondary metabolites of plants represent a large library of compounds that are important sources for new drugs or compounds suitable for further modification...
February 2017: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/28029734/investigation-of-the-first-seven-reported-cases-of-candida-auris-a-globally-emerging-invasive-multidrug-resistant-fungus-united-states-may-2013-august-2016
#9
EDITORIAL
S Vallabhaneni, A Kallen, S Tsay, N Chow, R Welsh, J Kerins, S K Kemble, M Pacilli, S R Black, E Landon, J Ridgway, T N Palmore, A Zelzany, E H Adams, M Quinn, S Chaturvedi, J Greenko, R Fernandez, K Southwick, E Y Furuya, D P Calfee, C Hamula, G Patel, P Barrett, P Lafaro, E L Berkow, H Moulton-Meissner, J Noble-Wang, R P Fagan, B R Jackson, S R Lockhart, A P Litvintseva, T M Chiller
November 11, 2016/65(44);1234-1237. What is already known about this topic? Candida auris is an emerging pathogenic fungus that has been reported from at least a dozen countries on four continents during 2009-2015. The organism is difficult to identify using traditional biochemical methods, some isolates have been found to be resistant to all three major classes of antifungal medications, and C. auris has caused health care-associated outbreaks. What is added by this report? This is the first description of C...
January 2017: American Journal of Transplantation
https://www.readbyqxmd.com/read/27998758/the-synthesis-and-antifungal-activity-of-20s-3%C3%AE-acetoxy-5%C3%AE-pregnane-20-16%C3%AE-carbolactone-against-fluconazole-resistant-candida-cells
#10
Izabella Jastrzebska, Katarzyna Niemirowicz, Wioleta I Brzozowska, Robert Bucki
An efficient procedure for the synthesis of (20S)-3β-acetoxy-5α-pregnane-20,16β-carbolactone is described. Bactericidal and fungicidal activity of the lactone against different bacteria such as MSSA, MRSA, E. coli ESBL, P. aeruginosa and clinical isolates of Candida spp., in planktonic and biofilm growth stage were assessed. Additionally, the affinity of this new compound to microbial plasma membrane and hemoglobin release from human red blood cells were determined using fluorometric and colorimetric assay, respectively...
December 18, 2016: Steroids
https://www.readbyqxmd.com/read/27959780/invitro-antifungal-susceptibilities-of-candida-species-to-liposomal-amphotericin-b-determined-using-clsi-broth-microdilution-and-amphotericin-b-deoxycholate-measured-using-the-etest
#11
Grazia Lovero, Osvalda De Giglio, Serafina Rutigliano, Giusy Diella, Giuseppina Caggiano, Maria Teresa Montagna
The antifungal susceptibilities of 598 isolates of Candida spp. (bloodstream and other sterile sites) to liposomal amphotericin B (L-AmB) versus amphotericin B (AmB) were determined. MICs were calculated using the Clinical and Laboratory Standards Institute broth microdilution (M27-A3) method for L-AmB and the Etest method for AmB. The MIC50/MIC90 (µg ml-1) values for L-AmB broth microdilution and AmB Etest were 0.25/1 and 0.19/0.5, respectively. The overall essential agreement (±2 dilutions) was 91.5 %, ranging from 37...
March 2017: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/27917162/activity-of-scorpion-venom-derived-antifungal-peptides-against-planktonic-cells-of-candida-spp-and-cryptococcus-neoformans-and-candida-albicans-biofilms
#12
Fernanda Guilhelmelli, Nathália Vilela, Karina S Smidt, Marco A de Oliveira, Alice da Cunha Morales Álvares, Maria C L Rigonatto, Pedro H da Silva Costa, Aldo H Tavares, Sônia M de Freitas, André M Nicola, Octávio L Franco, Lorena da Silveira Derengowski, Elisabeth F Schwartz, Márcia R Mortari, Anamélia L Bocca, Patrícia Albuquerque, Ildinete Silva-Pereira
The incidence of fungal infections has been increasing in the last decades, while the number of available antifungal classes remains the same. The natural and acquired resistance of some fungal species to available therapies, associated with the high toxicity of these drugs on the present scenario and makes an imperative of the search for new, more efficient and less toxic therapeutic choices. Antimicrobial peptides (AMPs) are a potential class of antimicrobial drugs consisting of evolutionarily conserved multifunctional molecules with both microbicidal and immunomodulatory properties being part of the innate immune response of diverse organisms...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27855078/echinocandin-resistance-in-candida-species-isolates-from-liver-transplant-recipients
#13
Gwénolé Prigent, Nawel Aït-Ammar, Eric Levesque, Arnaud Fekkar, Jean-Marc Costa, Sarra El Anbassi, Françoise Foulet, Christophe Duvoux, Jean-Claude Merle, Eric Dannaoui, Françoise Botterel
Liver transplant recipients are at risk of invasive fungal infections, especially candidiasis. Echinocandin is recommended as prophylactic treatment but is increasingly associated with resistance. Our aim was to assess echinocandin drug resistance in Candida spp. isolated from liver transplant recipients treated with this antifungal class. For this, all liver-transplanted patients in a University Hospital (Créteil, France) between January and June of 2013 and 2015 were included. Susceptibilities of Candida isolates to echinocandins were tested by Etest and the EUCAST reference method...
February 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/27842866/reviewing-the-importance-and-evolution-of-fungal-infections-and-potential-antifungal-resistance-in-haematological-patients
#14
REVIEW
Alessandro Busca, Anna Maria Tortorano, Livio Pagano
There is a growing body of evidence supporting the emergence of azole resistance in Aspergillus and Candida spp. and this may be of particular concern due to the potential implications in the management of invasive fungal infections occurring in immunocompromised hosts. The aim of present review was to describe the magnitude of the problem, summarising the epidemiology and potential impact of yeast and mould antifungal resistance in patients with haematological malignancies. The first cases of triazole-resistant Aspergillus fumigatus isolates were reported in 1997 in patients receiving itraconazole...
December 2015: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/27816903/molecular-and-antifungal-susceptibility-study-on-trichosporonemia-and-emergence-of-trichosporon-mycotoxinivorans-as-a-bloodstream-pathogen
#15
Yubhisha Dabas, Immaculata Xess, Pratibha Kale
A total of 21 Trichosporon spp. isolates from blood over a period of 5 years (January 2009 to December 2013) were included in the study. The most common underlying diseases found were pancreatitis (33.3%) and cancer (33.3%). Trichosporon asahii (80.9%) was the commonest species followed by Trichosporon mycotoxinivorans (14.2%) and Trichosporon faecale (4.7%). On IGS1 region sequencing the most predominant T. asahii type in our region was genotype 1 (16/17 isolates; 94.1%) and one isolate belonged to genotype 4...
November 5, 2016: Medical Mycology: Official Publication of the International Society for Human and Animal Mycology
https://www.readbyqxmd.com/read/27713018/use-of-phylogenetical-analysis-to-predict-susceptibility-of-pathogenic-candida-spp-to-antifungal-drugs
#16
Andrée F Maheux, Adnane Sellam, Yves Piché, Maurice Boissinot, René Pelletier, Dominique K Boudreau, François J Picard, Hélène Trépanier, Marie-Josée Boily, Marc Ouellette, Paul H Roy, Michel G Bergeron
Successful treatment of a Candida infection relies on 1) an accurate identification of the pathogenic fungus and 2) on its susceptibility to antifungal drugs. In the present study we investigated the level of correlation between phylogenetical evolution and susceptibility of pathogenic Candida spp. to antifungal drugs. For this, we compared a phylogenetic tree, assembled with the concatenated sequences (2475-bp) of the ATP2, TEF1, and TUF1 genes from 20 representative Candida species, with published minimal inhibitory concentrations (MIC) of the four principal antifungal drug classes commonly used in the treatment of candidiasis: polyenes, triazoles, nucleoside analogues, and echinocandins...
October 3, 2016: Journal of Microbiological Methods
https://www.readbyqxmd.com/read/27667564/miltefosine-inhibits-candida-albicans-and-non-albicans-candida-spp-biofilms-and-impairs-the-dispersion-of-infectious-cells
#17
Taissa Vila, Kelly Ishida, Sergio Henrique Seabra, Sonia Rozental
Candida spp. can adhere to and form biofilms over different surfaces, becoming less susceptible to antifungal treatment. Resistance of biofilms to antifungal agents is multifactorial and the extracellular matrix (ECM) appears to play an important role. Among the few available antifungals for treatment of candidaemia, only the lipid formulations of amphotericin B (AmB) and the echinocandins are effective against biofilms. Our group has previously demonstrated that miltefosine has an important effect against Candida albicans biofilms...
November 2016: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/27645246/the-celecoxib-derivative-ar-12-has-broad-spectrum-antifungal-activity-in-vitro-and-improves-the-activity-of-fluconazole-in-a-murine-model-of-cryptococcosis
#18
Kristy Koselny, Julianne Green, Louis DiDone, Justin P Halterman, Annette W Fothergill, Nathan P Wiederhold, Thomas F Patterson, Melanie T Cushion, Chad Rappelye, Melanie Wellington, Damian J Krysan
Only one new class of antifungal drugs has been introduced into clinical practice in the last 30 years, and thus the identification of small molecules with novel mechanisms of action is an important goal of current anti-infective research. Here, we describe the characterization of the spectrum of in vitro activity and in vivo activity of AR-12, a celecoxib derivative which has been tested in a phase I clinical trial as an anticancer agent. AR-12 inhibits fungal acetyl coenzyme A (acetyl-CoA) synthetase in vitro and is fungicidal at concentrations similar to those achieved in human plasma...
December 2016: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/27587066/micafungin-treatment-and-eradication-of-candiduria-among-hospitalized-patients
#19
Steven Gabardi, Spencer Martin, Mihir Sura, Anisa Mohammed, Yoav Golan
PURPOSE: In high-risk patients, candiduria may be associated with the development of urinary tract infections (UTI) and invasive candidiasis. The triazole antifungals achieve good urine concentrations, but their use is limited by the emergence of non-albicans Candida spp. with low-triazole susceptibility. The echinocandins remain fungicidal against many azole-resistant Candida spp., but low urine concentrations limit their use. We examined the rates of candiduria elimination in micafungin-treated patients...
November 2016: International Urology and Nephrology
https://www.readbyqxmd.com/read/27576581/liquid-and-vapour-phase-antifungal-activities-of-essential-oils-against-candida-albicans-and-non-albicans-candida
#20
Narcisa Mandras, Antonia Nostro, Janira Roana, Daniela Scalas, Giuliana Banche, Valeria Ghisetti, Simonetta Del Re, Giacomo Fucale, Anna Maria Cuffini, Vivian Tullio
BACKGROUND: The management of Candida infections faces many problems, such as a limited number of antifungal drugs, toxicity, resistance of Candida to commonly antifungal drugs, relapse of Candida infections, and the high cost of antifungal drugs. Though azole antifungal agents and derivatives continue to dominate as drugs of choice against Candida infections, there are many available data referring to the anticandidal activity of essential oils. Since we have previous observed a good antimicrobial activity of some essential oils against filamentous fungi, the aim of this study was to extend the research to evaluate the activity of the same oils on Candida albicans, C...
August 30, 2016: BMC Complementary and Alternative Medicine
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