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Candida tropicalis

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https://www.readbyqxmd.com/read/28646915/isolation-speciation-and-antifungal-susceptibility-testing-of-candida-isolates-from-various-clinical-specimens-at-a-tertiary-care-hospital-nepal
#1
Sundar Khadka, Jeevan Bahadur Sherchand, Bharat Mani Pokhrel, Keshab Parajuli, Shyam Kumar Mishra, Sangita Sharma, Niranjan Shah, Hari Prasad Kattel, Subhash Dhital, Sulochana Khatiwada, Narayan Parajuli, Manoj Pradhan, Basista Prasad Rijal
BACKGROUND: Candida species are responsible for various clinical infections ranging from mucocutaneous infection to life threatening invasive diseases along with increased resistance to antifungal drugs has made a serious concern. Resistance to antifungal agents has increased during the last decade. Thus, identification of Candida up to species level and its antifungal susceptibility testing has a paramount significance in the management of Candidal infections. The aim of the study was to speciate Candida species and to determine antifungal susceptibility pattern of Candida species to antifungal agents...
June 24, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28640755/chemical-composition-and-biological-activities-of-leaf-and-fruit-essential-oils-from-eucalyptus-camaldulensis
#2
Gulden Dogan, Nazan Kara, Eyup Bagci, Seher Gur
The chemical composition of the essential oils from the leaves and fruit of Eucalyptus camaldulensis grown in Mersin, Turkey was analyzed using gas chromatography (GC) and gas chromatography-mass spectrometry (GC-MS) techniques. The biological activities (antibacterial and antifungal) were examined using the agar well diffusion method. The main leaf oil constituents were p-cymene (42.1%), eucalyptol (1,8-cineole) (14.1%), α-pinene (12.7%) and α-terpinol (10.7%). The main constituents of the fruit oil were eucalyptol (1,8-cineole) (34...
June 22, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/28634471/a-chitin-binding-protein-purified-from-moringa-oleifera-seeds-presents-anticandidal-activity-by-increasing-cell-membrane-permeability-and-reactive-oxygen-species-production
#3
João X S Neto, Mirella L Pereira, Jose T A Oliveira, Lady C B Rocha-Bezerra, Tiago D P Lopes, Helen P S Costa, Daniele O B Sousa, Bruno A M Rocha, Thalles B Grangeiro, José E C Freire, Ana Cristina O Monteiro-Moreira, Marina D P Lobo, Raimunda S N Brilhante, Ilka M Vasconcelos
Candida species are opportunistic pathogens that infect immunocompromised and/or immunosuppressed patients, particularly in hospital facilities, that besides representing a significant threat to health increase the risk of mortality. Apart from echinocandins and triazoles, which are well tolerated, most of the antifungal drugs used for candidiasis treatment can cause side effects and lead to the development of resistant strains. A promising alternative to the conventional treatments is the use of plant proteins...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28632834/-bladder-fungus-ball-by-candida-tropicalis-a-pediatric-case-report
#4
Ecil Santos, Mónica Mercado, Antonio Luévanos, Pedro Martínez, Martín Guerrero
Vesical fungus ball is a mobile, oval and echogenic mass as a result of accumulation of long and wide numerous hyphae. Fungal urinary tract infection incidence has increased notoriously and there are isolated yeast in 7 to 8% of urine cultures. Different species of Candida are cause of urinary tract infection. Epidemiologically, the first isolated pathogen is Candida albicans, followed by Candida tropicalis. Bladder poll has been documented as the most important risk factor for candiduria in critical patients into intensive care...
April 2017: Revista Chilena de Infectología: órgano Oficial de la Sociedad Chilena de Infectología
https://www.readbyqxmd.com/read/28622982/comparison-of-the-vitek-2-antifungal-susceptibility-system-with-etest-using-clinical-isolates-of-candida-species
#5
Wadha Alfouzan, Tahani Al-Enezi, Ebteehal AlRoomi, Vayalil Sandhya, Rachel Chandy, Zia Uddin Khan
BACKGROUND: Candida species are part of the normal human microbiota. However, in recent years, nosocomial bloodstream Candida infections have emerged as a significant problem ranking the fourth common cause of fungemia in intensive care units. Although microdilution methods are the ones recommended for susceptibility testing, they are difficult to undertake in the clinical practice. Thus, an automated commercially available test is ideal. AIMS: To compare minimum inhibitory concentrations (MICs) obtained with the recently introduced Vitek 2 yeast susceptibility system card (AST-YS01) with Etest...
June 13, 2017: Revista Iberoamericana de Micología
https://www.readbyqxmd.com/read/28611662/an-antifungal-mechanism-of-protolichesterinic-acid-from-the-lichen-usnea-albopunctata-lies-in-the-accumulation-of-intracellular-ros-and-mitochondria-mediated-cell-death-due-to-apoptosis-in-candida-tropicalis
#6
S N Kumar, C Mohandas
Candida species causes superficial and life-threatening systemic infections and are difficult to treat due to the resistance of these organism to various clinically used drugs. Protolichesterinic acid is a well-known lichen compound. Although the antibacterial activity of protolichesterinic acid has been reported earlier, the antifungal property and its mechanism of action are still largely unidentified. The goal of the present investigation is to explore the anticandidal activity and mechanism of action of protolichesterinic acid, especially against Candida tropicalis...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28603107/anti-fungal-and-anti-mycobacterial-activity-of-plants-of-nuevo-leon-mexico
#7
Blanca Alicia Alanis Garza, Joel López Arroyo, Gloria González González, Elvira Garza González, Elvira Garza González, Noemí Waksman de Torres, Ricardo Salazar Aranda
Severe fungal infections, particularly those caused by Candida spp, have increased in recent decades and are associated with an extremely high rate of morbidity and mortality. Since plants are an important source of potentially bioactive compounds, in this work the antifungal activity of the methanol extracts of 10 plants (Acacia rigidula, Buddleja cordata, Cephalanthus occidentalis, Juglans nigra, Parkinsonia aculeata, Parthenium hysterophorus, Quercus canbyi, Ricinus communis, Salvia coccinea and Teucrium bicolor) were evaluated...
January 2017: Pakistan Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28601403/-activity-of-amphotericin-b-and-anidulafungin-alone-and-combined-against-candida-tropicalis-biofilms-developed-on-teflon-%C3%A2-and-titanium
#8
Marcelo Ernesto Fernández-Rivero, José L Del Pozo, Amparo Valentín, Victoria Fornes, Araceli Molina de Diego, Javier Pemán, Emilia Cantón
BACKGROUND: Current therapeutic strategies have a limited efficacy against Candida biofilms that form on the surfaces of biomedical devices. Few studies have evaluated the activity of antifungal agents against Candida tropicalis biofilms. OBJECTIVES: To evaluate the activity of amphotericin B (AMB) and anidulafungin (AND), alone and in combination, against C. tropicalis biofilms developed on polytetrafluoroethylene (teflon -PTFE) and titanium surfaces using time-kill assays...
June 14, 2017: Revista Iberoamericana de Micología
https://www.readbyqxmd.com/read/28597394/invasive-candidiasis-in-brescia-italy-analysis-of-species-distribution-and-antifungal-susceptibilities-during-seven-years
#9
M A De Francesco, G Piccinelli, M Gelmi, F Gargiulo, G Ravizzola, G Pinsi, L Peroni, C Bonfanti, A Caruso
The aims of this study were to evaluate the epidemiology of nosocomial candidemia in a large teaching hospital in Brescia, Italy, and the in vitro antifungal susceptibility of isolates. We analyzed 196 isolates causing fungemia in patients admitted in our hospital, between January 2009 and December 2015. Strains were identified by VITEK 2 and MALDI-TOF MS. MICs were determined by Sensititre Yeast OneTM. The resistance was defined by using the revised CLSI breakpoints/epidemiological cutoff values to assign susceptibility or wild type to systemic antifungal agents...
June 8, 2017: Mycopathologia
https://www.readbyqxmd.com/read/28597304/improved-tet-on-and-tet-off-systems-for-tetracycline-regulated-expression-of-genes-in-candida
#10
Swati Bijlani, Anubhav S Nahar, K Ganesan
Tetracycline-regulated expression of genes is often used for functional analysis of Candida albicans genes. However, the widely used Tet-On system has certain limitations such as prolonged lag time (up to 8 h) for induction and non-uniform expression among the cells. We speculated that poor expression of tetracycline-controlled transactivator (Tet-transactivator) from CaADH1 promoter could be responsible for this, and thus compared the effect of expressing this protein under the control of CaADH1, CaTDH3 and CaRP10 promoters on the expression of GFP from the TET promoter...
June 8, 2017: Current Genetics
https://www.readbyqxmd.com/read/28589225/characterization-of-the-newly-isolated-%C3%AF-oxidizing-yeast-candida-sorbophila-ds02-and-its-potential-applications-in-long-chain-dicarboxylic-acid-production
#11
Heeseok Lee, Yohanes Eko Chandra Sugiharto, Seunghoon Lee, Gyuyeon Park, Changpyo Han, Hyeran Jang, Wooyoung Jeon, Heejoon Park, Jungoh Ahn, Kyungbo Kang, Hongwoen Lee
α, ω-Dicarboxylic acids (DCAs) are multipurpose chemicals widely used in polymers, perfumes, plasticizers, lubricants, and adhesives. The biotransformation of DCAs from alkanes and fatty acids by microorganisms has attracted recent interest, since synthesis via chemical oxidation causes problems in terms of the environment and safety. We isolated an ω-oxidizing yeast from a wastewater disposal facility of a petrochemical factory by chemostat enrichment culture. The haploid strain identified as Candida sorbophila DS02 grew on glucose and dodecane, exhibiting greater cell shrinkage on the latter...
June 6, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28587831/clinical-characteristics-and-risk-factors-for-mortality-in-adult-patients-with-persistent-candidemia
#12
Seung Ji Kang, Seong Eun Kim, Uh Jin Kim, Hee-Chang Jang, Kyung-Hwa Park, Jong Hee Shin, Sook In Jung
BACKGROUND: We investigated the clinical characteristics and risk factors for mortality in adults with persistent candidemia. METHODS: All patients ≥18 years old with candidemia in two Korean tertiary hospitals from 2007 to 2014 were investigated. Persistent candidemia was defined as isolation of the same Candida species ≥5 days after initiation of antifungal therapy. Non-persistent candidemia was defined as candidemia persisting for ≤3 days after initiation of antifungal therapy...
June 3, 2017: Journal of Infection
https://www.readbyqxmd.com/read/28578925/identification-of-candida-species-in-vaginal-flora-using-conventional-and-molecular-methods
#13
F Ameen, M Moslem, M Al Tami, H Al-Ajlan, N Al-Qahtani
Vaginal swab samples were collected both from women with signs of acute vulvovaginal candidiasis (VVC; n=270) and from healthy controls (n=100). The microscopic examination revealed a significant difference in the proportion of positive cultures of Candida between the VVC (33%) and control (21%) groups. To determine the frequency of different species, positive cultures were analyzed using the germ tube test, CHROMagar medium, API 20 AUX System and DNA analysis. CHROMagar and API 20 AUX System tests identified 67% of samples as C...
June 1, 2017: Journal de Mycologie Médicale
https://www.readbyqxmd.com/read/28578870/the-essential-oil-of-allium-sativum-as-an-alternative-agent-against-candida-isolated-from-dental-prostheses
#14
Alejandro Mendoza-Juache, Saray Aranda-Romo, Josué R Bermeo-Escalona, Araceli Gómez-Hernández, Amaury Pozos-Guillén, Luis Octavio Sánchez-Vargas
BACKGROUND: The colonization of the surfaces of dental prostheses by Candida albicans is associated with the development of denture stomatitis. In this context, the use of fluconazole has been proposed, but its disadvantage is microbial resistance. Meanwhile, the oil of Allium sativum has shown an effect in controlling biofilm formation by C. albicans. AIMS: The objective of this study was to determine the antifungal activities of the essential oil of A. sativum and fluconazole against clinical isolates of Candida species obtained from rigid, acrylic-based partial or total dentures and to compare these agents' effects on both biofilm and planktonic cells...
June 1, 2017: Revista Iberoamericana de Micología
https://www.readbyqxmd.com/read/28577425/denaturing-gradient-gel-electrophoresis-profiles-of-bacteria-from-the-saliva-of-twenty-four-different-individuals-form-clusters-that-showed-no-relationship-to-the-yeasts-present
#15
Manjula M Weerasekera, Chris H Sissons, Lisa Wong, Sally A Anderson, Ann R Holmes, Richard D Cannon
OBJECTIVES: The aim was to investigate the relationship between groups of bacteria identified by cluster analysis of the DGGE fingerprints and the amounts and diversity of yeast present. METHODS: Bacterial and yeast populations in saliva samples from 24 adults were analysed using denaturing gradient gel electrophoresis (DGGE) of the bacteria present and by yeast culture. RESULTS: Eubacterial DGGE banding patterns showed considerable variation between individuals...
May 22, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/28571137/auxanographic-carbohydrate-assimilation-method-for-large-scale-yeast-identification
#16
Suganthi Martena Devadas, Mamatha Ballal, Peralam Yegneswaran Prakash, Manjunath H Hande, Geetha V Bhat, Vinitha Mohandas
INTRODUCTION: The auxanographic carbohydrate assimilation had been an important method for differentiation of yeasts. Prevailing methods described in the literature for carbohydrate assimilation has limited scope for use in large scale yeast identification. AIM: To optimize the large scale auxanographic carbohydrate assimilation method for yeast identification. MATERIALS AND METHODS: A modified auxanographic carbohydrate assimilation method was developed and a total of 35 isolates of Candida species comprising of four ATCC (American Type Culture Collection) Candida strains (Candida albicans ATCC 90028, Candida tropicalis ATCC 90018, Candida parapsilosis ATCC 750, Candida krusei ATCC 6258) and 31 clinical isolates of Candida tropicalis (n=13), Candida krusei (n=7), Candida glabrata (n=3), Candida kefyr (n=3), Candida albicans (n=5) were validated...
April 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28527284/-new-multiplex-pcr-for-species-specific-diagnosis-of-human-candidiasis
#17
Liliana Torcoroma García, Liany Johanna Luna, Tania Katherine Velasco, Beatriz Elena Guerra
INTRODUCTION: Candidiases is a group of opportunistic infections caused by yeasts belonging to the genus Candida. Candida albicans is the most prevalent species in both superficial and deep infections, however, the clinical importance of non-albicans Candida has increased during the last decade, driving an urgent need for diagnostic tests that allow for species-level resolution and selection of the optimum therapeutic approach. OBJECTIVE: To design and to optimize a new multiplex PCR assay for the simultaneous identification of the five most relevant species of Candida involved in human candidiasis etiology...
June 1, 2017: Biomédica: Revista del Instituto Nacional de Salud
https://www.readbyqxmd.com/read/28527136/factors-influencing-non-albicans-candidemia-a-case-case-control-study
#18
Diamantis P Kofteridis, Antonis Valachis, Dimitra Dimopoulou, Angeliki M Andrianaki, Athanasia Christidou, Sofia Maraki, Nikolaos A Spernovasilis, George Samonis
The study identified factors predisposing to non-albicans candidemia with special interest to prior antimicrobial treatment. A retrospective, case-case-control study was performed at the University Hospital of Heraklion, Greece, from November 2007 through September 2011 including adult patients. The study had three groups. The first included 58 patients with non-albicans candidemia, the second 48 with C. albicans candidemia, while the third (control) 104 without candidemia. Each of the two candidemia groups was compared with the control using multivariate logistic regression model...
May 19, 2017: Mycopathologia
https://www.readbyqxmd.com/read/28525644/risk-factors-and-clinical-outcomes-of-breakthrough-yeast-bloodstream-infections-in-patients-with-hematological-malignancies-in-the-era-of-newer-antifungal-agents
#19
Si-Hyun Kim, Jae-Ki Choi, Sung-Yeon Cho, Hyo-Jin Lee, Sun Hee Park, Su-Mi Choi, Dong-Gun Lee, Jung-Hyun Choi, Jin-Hong Yoo, Jong-Wook Lee
Although yeast bloodstream infections (BSIs) are increasingly being reported in patients with hematological malignancies undergoing antifungal therapy, clinical information regarding breakthrough infections is scarce. The aim of this study was to determine the risk factors for and clinical outcomes of breakthrough yeast BSIs in patients with hematological malignancies in the era of newer antifungal agents. Between 2011 and 2014, all consecutive patients with hematological malignancies who developed yeast BSIs were included in a case-control study wherein breakthrough infections (cases) and de novo infections (controls) were compared...
May 19, 2017: Medical Mycology: Official Publication of the International Society for Human and Animal Mycology
https://www.readbyqxmd.com/read/28507109/erg11-gene-mutations-and-mdr1-up-regulation-confer-pan-azole-resistance-in-candida-tropicalis-causing-disseminated-candidiasis-while-on-posaconazole-prophylaxis-in-an-acute-lymphoblastic-leukemia-patient
#20
Liangshun You, Wenbin Qian, Qing Yang, Liping Mao, Li Zhu, Xianbo Huang, Jie Jin, Haitao Meng
In this study, we presented a rare case of fatal breakthrough Candida tropicalis in a patient with acute lymphoblastic leukemia (ALL) while on posaconazole prophylaxis. And then we explored the mechanisms underlying azole resistance by focusing on enhanced efflux pumps and changes in the azole target enzyme Erg11p, which was encoded by the ERG11 gene. Our study demonstrates that Y132C substitution of Erg11p combined with MDR1 overexpression may be the pan-azole-resistance mechanisms in Candida tropicalis.
May 15, 2017: Antimicrobial Agents and Chemotherapy
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