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Candida tropicalis

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https://www.readbyqxmd.com/read/27913142/candida-species-from-oral-cavity-of-hiv-infected-children-exhibit-reduced-virulence-factors-in-the-haart-era
#1
Maristela Barbosa Portela, Elaine Lima de Amorim, Adrielle Mangabeira Santos, José Alexandre da Rocha Curvelo, Karol de Oliveira Martins, Cauli Lima Capillé, Rosangela Maria de Araújo Soares, Gloria Fernanda Barbosa de Araújo Castro
This study aimed to assess, in vitro, the biofilm viability and the phospholipase and protease production of Candida spp. from the saliva of HIV infected children and healthy controls, and to correlate the results with the use of medical data. A total of 79 isolates were analyzed: 48 Candida albicans isolates (33/15) and 20 Candida parapsilosis sensu lato complex isolates (12/8) (from HIV/control patients, respectively), and 8 Candida krusei, 1 Candida tropicalis, 1 Candida dubliniensis and 1 Candida guilliermondii from HIV patients...
November 29, 2016: Microbial Pathogenesis
https://www.readbyqxmd.com/read/27895625/evaluation-of-virulence-factors-in-vitro-resistance-to-osmotic-stress-and-antifungal-susceptibility-of-candida-tropicalis-isolated-from-the-coastal-environment-of-northeast-brazil
#2
Diana L Zuza-Alves, Sayama S T Q de Medeiros, Luanda B F C de Souza, Walicyranison P Silva-Rocha, Elaine C Francisco, Maria C B de Araújo, Reginaldo G Lima-Neto, Rejane P Neves, Analy S de Azevedo Melo, Guilherme M Chaves
Several studies have been developed regarding human health risks associated with the recreational use of beaches contaminated with domestic sewage. These wastes contain various micro-organisms, including Candida tropicalis. In this context, the objective of this study was to characterize C. tropicalis isolates from the sandy beach of Ponta Negra, Natal, Rio Grande do Norte, Brazil, regarding the expression of in vitro virulence factors, adaptation to osmotic stress and susceptibility to antifungal drugs. We analyzed 62 environmental isolates and observed a great variation among them for the various virulence factors evaluated...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27891177/furfural-tolerance-and-detoxification-mechanism-in-candida-tropicalis
#3
Shizeng Wang, Gang Cheng, Chijioke Joshua, Zijun He, Xinxiao Sun, Ruimin Li, Lexuan Liu, Qipeng Yuan
BACKGROUND: Current biomass pretreatment by hydrothermal treatment (including acid hydrolysis, steam explosion, and high-temperature steaming) and ionic liquids generally generate inhibitors to the following fermentation process. Furfural is one of the typical inhibitors generated in hydrothermal treatment of biomass. Furfural could inhibit cell growth rate and decrease biofuel productivity of microbes. Candida tropicalis is a promising microbe for the production of biofuels and value-added chemicals using hemicellulose hydrolysate as carbon source...
2016: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/27886119/synthesis-and-antifungal-screening-of-2-1-5-alkyl-arylalkylpyrazin-2-yl-ethylidene-hydrazono-1-3-thiazolidin-4-ones
#4
Veronika Opletalova, Jan Dolezel, Jiri Kunes, Vladimir Buchta, Marcela Vejsova, Marta Kucerova-Chlupacova
Two novel thiosemicarbazones and eight novel 2-{[1-(5-alkyl/arylalkylpyrazin-2-yl)ethylidene]hydrazono}-1,3-thiazolidin-4-ones were prepared and tested against a panel of eight fungal strains-Candida albicans ATCC 44859, Candida tropicalis 156, Candida krusei E 28, Candida glabrata 20/I, Trichosporon asahii 1188, Aspergillus fumigatus 231, Lichtheimia corymbifera 272, and Trichophyton interdigitale 445. 1,3-Thiazolidin-4-ones exhibited activity against all strains, the most potent derivative was 2-{[1-(5-butylpyrazin-2-yl)ethylidene]hydrazono}e-1,3-thiazolidin-4-one...
November 23, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/27864011/molecular-characterization-of-candida-isolates-from-intensive-care-unit-patients-krakow-poland
#5
Marianna Małek, Paulina Paluchowska, Bożena Bogusz, Alicja Budak
BACKGROUND: Over the last decades, Candida species have emerged as important pathogens in immunocompromised patients. Nosocomial infections are mainly of endogenous origin. Nevertheless, some cases of exogenous candidiasis have also been reported. AIMS: The aim of this study was to evaluate the genetic relatedness between Candida albicans, Candida glabrata, Candida tropicalis, Candida krusei and Candida kefyr isolates recovered from intensive care unit (ICU) patients...
November 15, 2016: Revista Iberoamericana de Micología
https://www.readbyqxmd.com/read/27858242/epidemiology-and-reporting-of-candidaemia-in-belgium-a-multi-centre-study
#6
C Trouvé, S Blot, M-P Hayette, S Jonckheere, S Patteet, H Rodriguez-Villalobos, F Symoens, E Van Wijngaerden, K Lagrou
The primary aim of this study was to collect national epidemiological data on candidaemia and to determine the reporting time of species identification and antifungal susceptibility in clinical practice. During a 1-year period (March 2013 until February 2014), every first Candida isolate from each episode of candidaemia was included prospectively from 30 Belgian hospitals. Identification and susceptibility testing were performed according to local procedures and isolates were sent to the National Reference Center for Mycosis...
November 17, 2016: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/27856231/bioprospecting-thermotolerant-ethanologenic-yeasts-for-simultaneous-saccharification-and-fermentation-from-diverse-environments
#7
Jairam Choudhary, Surender Singh, Lata Nain
Lignocellulosic biomass, a promising renewable energy source, can be used for the production of second generation bioethanol. Simultaneous saccharification and fermentation (SSF), the process which alleviates the problem of separate hydrolysis and fermentation (SHF), requires thermotolerant ethanologenic yeast for bioethanol production. Therefore, ten yeast strains isolated from diverse sources, belonging to various genera like Saccharomyces, Candida, Pichia and Wickerhamomyces were evaluated for their thermotolerance, sugar utilization pattern, inhibitor tolerance and ethanol production potential with glucose, xylose and alkali pretreated paddy straw...
November 14, 2016: Journal of Bioscience and Bioengineering
https://www.readbyqxmd.com/read/27851809/a-genome-wide-transcriptional-analysis-of-yeast-hyphal-transition-in-candida-tropicalis-by-rna-seq
#8
Yuan Wu, Yin-Hu Li, Shuan-Bao Yu, Wen-Ge Li, Xiao-Shu Liu, Lei Zhao, Jin-Xing Lu
Candida tropicalis is considered as the leading pathogen in nosocomial fungemia and hepatosplenic fungal infections in patients with cancer, particularly in leukemia. The yeast-filament transition is required for virulent infection by Candida. Several studies have explored the genome-wide transcription profile of Candida, however, no report on the transcriptional profile of C. tropicalis under yeast-filament transition has been published. In this study, the transcriptomes of three C. tropicalis isolates with different adhesion and biofilm formation abilities, identified in our previous studies, were analyzed in both the yeast and filament states using RNA-Seq...
2016: PloS One
https://www.readbyqxmd.com/read/27849234/thyroid-abnormalities-in-term-infants-with-fungal-sepsis
#9
Maria Helena Baptista Nunes da Silva, Maria Cristina Korbage de Araujo, Edna Maria de Albuquerque Diniz, Maria Esther Jurfest Rivero Ceccon, Werther Brunow de Carvalho
Objective: To describe thyroid alterations in term newborns (TNB) with fungal sepsis during NICU hospitalization. Method: The study included six TNB that during the clinical and laboratory manifestations of sepsis with positive cultures for fungus showed changes in thyroid hormones, called low T3 syndrome and low T3-T4 syndrome. TNB that could present hormonal changes caused by disease as those born to mothers with thyroid disease, or who had perinatal asphyxia and major surgeries were excluded...
September 2016: Revista da Associação Médica Brasileira
https://www.readbyqxmd.com/read/27837513/t2-magnetic-resonance-for-fungal-diagnosis
#10
Fainareti N Zervou, Ioannis M Zacharioudakis, Jaclynn Kurpewski, Eleftherios Mylonakis
Rapid diagnostic methods for fungal infections are long awaited and are expected to improve outcomes through early initiation of targeted antifungal therapy. T2Candida panel is a novel qualitative diagnostic platform that was recently approved by the US Food and Drug Administration (FDA) for diagnosis of candidemia with a mean time to species identification of less than 5 h. T2Candida panel is performed on the fully automated T2Dx instrument in whole blood K2EDTA specimens and is able to detect 5 Candida spp...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27820850/novel-polymorphic-multilocus-microsatellite-markers-to-distinguish-candida-tropicalis-isolates
#11
Xin Fan, Meng Xiao, Ping Liu, Sharon Chen, Fanrong Kong, He Wang, Li Zhang, Xin Hou, Ying-Chun Xu
Candida tropicalis is an important pathogen. Here we developed and evaluated a polymorphic multilocus microsatellite scheme employing novel genetic markers for genotyping of C. tropicalis. Using 10 isolates from 10 unique (separate) patients to screen over 4000 tandem repeats from the C. tropicalis genome (strain MYA-3404), six new candidate microsatellite loci (ctm1, ctm3, ctm8, ctm18, ctm24 and ctm26) were selected according to amplification success, observed polymorphisms and stability of flanking regions by preliminary testing...
2016: PloS One
https://www.readbyqxmd.com/read/27812511/transcriptional-control-of-drug-resistance-virulence-and-immune-system-evasion-in-pathogenic-fungi-a-cross-species-comparison
#12
REVIEW
Pedro Pais, Catarina Costa, Mafalda Cavalheiro, Daniela Romão, Miguel C Teixeira
Transcription factors are key players in the control of the activation or repression of gene expression programs in response to environmental stimuli. The study of regulatory networks taking place in fungal pathogens is a promising research topic that can help in the fight against these pathogens by targeting specific fungal pathways as a whole, instead of targeting more specific effectors of virulence or drug resistance. This review is focused on the analysis of regulatory networks playing a central role in the referred mechanisms in the human fungal pathogens Aspergillus fumigatus, Cryptococcus neoformans, Candida albicans, Candida glabrata, Candida parapsilosis, and Candida tropicalis...
2016: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/27810262/epidemiology-of-candida-isolates-from-intensive-care-units-in-colombia-from-2010-to-2013
#13
Gabriel Motoa, Juan Sebastián Muñoz, José Oñate, Christian José Pallares, Cristhian Hernández, María Virginia Villegas
BACKGROUND: The frequency of Candida isolates as a cause of hospital infections has risen in recent years, leading to high rates of morbidity and mortality. The knowledge of the epidemiology of those hospital acquired fungal infections is essential to implement an adequate antifungal therapy. AIMS: To describe the epidemiology of Candida infections in Intensive Care Units (ICUs) from a surveillance network in Colombia. METHODS: Information was collected from the microbiology laboratories of 20 tertiary healthcare institutions from 10 Colombian cities using the Whonet® software version 5...
October 31, 2016: Revista Iberoamericana de Micología
https://www.readbyqxmd.com/read/27799331/specific-human-and-candida-cellular-interactions-lead-to-controlled-or-persistent-infection-outcomes-during-granuloma-like-formation
#14
Barbara Misme-Aucouturier, Marjorie Albassier, Nidia Alvarez-Rueda, Patrice Le Pape
A delayed-type of multicellular process could be crucial during chronic candidiasis in determining the course of infection. This reaction, consisting of organized immune cells surrounding the pathogen, initiates an inflammatory response to avoid fungal dissemination. The goal of the present study was to examine, at an in vitro cellular scale, Candida spp. and human immune cells interaction dynamics during a long-term period. By challenging human peripheral blood immune cells from ten healthy donors with thirty-two C...
October 31, 2016: Infection and Immunity
https://www.readbyqxmd.com/read/27799221/frequency-of-the-paradoxical-effect-measured-using-eucast-with-micafungin-anidulafungin-and-caspofungin-against-candida-spp-isolates-causing-candidemia
#15
Laura Judith Marcos-Zambrano, Pilar Escribano, Carlos Sánchez-Carrillo, Emilio Bouza, Jesús Guinea
We report data on the frequency of the paradoxical effect of echinocandins against Candida spp. (n= 602 incident isolates) using the EUCAST EDef 7.2 procedure. The paradoxical effect for one or more echinocandins was observed in 16% of the isolates. However, differences between species were found, and the paradoxical effect was more common in Candida tropicalis (P<0.001). Caspofungin was the drug in which the paradoxical effect was most common, followed by anidulafungin and micafungin (P<0.001).
October 31, 2016: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/27799206/a-multi-center-study-of-method-dependent-epidemiological-cutoff-values-ecvs-for-resistance-detection-in-candida-spp-and-aspergillus-spp-to-amphotericin-b-and-echinocandins-for-the-etest-agar-diffusion-method
#16
A Espinel-Ingroff, M Arendrup, E Cantón, S Cordoba, E Dannaoui, J García-Rodríguez, G M Gonzalez, N P Govender, E Martin-Mazuelos, C Lass-Flörl, M Lackner, M J Linares Sicilia, M A Rodriguez-Iglesias, T Pelaez, R K Shields, G Garcia-Effron, J Guinea, M Sanguinetti, J Turnidge
Method-dependent Etest epidemiological cutoff values (ECVs) are not available for susceptibility testing of either Candida or Aspergillus species with amphotericin B or echinocandins. In addition, reference caspofungin MICs for Candida spp. are unreliable. Candida and Aspergillus species wild-type (WT) Etest MIC distributions (microorganisms in a species-drug combination with no detectable phenotypic resistance) were established for 4,341 Candida albicans, 113 C. dubliniensis, 1,683 C. glabrata species complex (SC), 709 C...
October 31, 2016: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/27796871/trehalose-6-phosphate-as-a-potential-lead-candidate-for-the-development-of-tps1-inhibitors-insights-from-the-trehalose-biosynthesis-pathway-in-diverse-yeast-species
#17
Rayne S S Magalhães, Karina C De Lima, Diego S G de Almeida, Joelma F De Mesquita, Elis C A Eleutherio
In some pathogens, trehalose biosynthesis is induced in response to stress as a protection mechanism. This pathway is an attractive target for antimicrobials as neither the enzymes, Tps1, and Tps2, nor is trehalose present in humans. Accumulation of T6P in Candida albicans, achieved by deletion of TPS2, resulted in strong reduction of fungal virulence. In this work, the effect of T6P on Tps1 activity was evaluated. Saccharomyces cerevisiae, C. albicans, and Candida tropicalis were used as experimental models...
October 29, 2016: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/27765617/a-rapid-highly-sensitive-and-culture-free-detection-of-pathogens-from-blood-by-positive-enrichment
#18
Manjula Ramya Vutukuru, Divya Khandige Sharma, M S Ragavendar, Susanne Schmolke, Yiwei Huang, Walter Gumbrecht, Nivedita Mitra
Molecular diagnostics is a promising alternative to culture based methods for the detection of bloodstream infections, notably due to its overall lower turnaround time when starting directly from patient samples. Whole blood is usually the starting diagnostic sample in suspected bloodstream infections. The detection of low concentrations of pathogens in blood using a molecular assay necessitates a fairly high starting volume of blood sample in the range of 5-10mL. This large volume of blood sample has a substantial accompanying human genomic content that interferes with pathogen detection...
October 17, 2016: Journal of Microbiological Methods
https://www.readbyqxmd.com/read/27765351/the-anthraquinones-rubiadin-and-its-1-methyl-ether-isolated-from-heterophyllaea-pustulata-reduces-candida-tropicalis-biofilms-formation
#19
Juliana Marioni, María Angel da Silva, José Luis Cabrera, Susana C Núñez Montoya, María Gabriela Paraje
BACKGROUND: Candida tropicalis is increasingly becoming among the most commonly isolated pathogens causing fungal infections with an important biofilm-forming capacity. PURPOSE: This study addresses the antifungal effect of rubiadin (AQ1) and rubiadin 1-methyl ether (AQ2), two photosensitizing anthraquinones (AQs) isolated from Heterophyllaea pustulata, against C. tropicalis biofilms, by studying the cellular stress and antioxidant response in two experimental conditions: darkness and irradiation...
November 15, 2016: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://www.readbyqxmd.com/read/27752797/streptomyces-luozhongensis-sp-nov-a-novel-actinomycete-with-antifungal-activity-and-antibacterial-activity
#20
Renwen Zhang, Xiaoxue Han, Zhanfeng Xia, Xiaoxia Luo, Chuanxing Wan, Lili Zhang
A novel actinomycete strain, designated TRM 49605(T), was isolated from a desert soil sample from Lop Nur, Xinjiang, north-west China, and characterised using a polyphasic taxonomic approach. The strain exhibited antifungal activity against the following strains: Saccharomyces cerevisiae, Curvularia lunata, Aspergillus flavus, Aspergillus niger, Fusarium oxysporum, Penicillium citrinum, Candida albicans and Candida tropicalis; Antibacterial activity against Bacillus subtilis, Staphylococcus epidermidis and Micrococcus luteus; and no antibacterial activity against Escherichia coli...
October 17, 2016: Antonie Van Leeuwenhoek
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