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Trichosporon

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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
#1
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/27862261/cell-surface-hydrophobicity-and-colony-morphology-of-trichosporon-asahii-clinical-isolates
#2
Tomoe Ichikawa, Chihiro Hirata, Mizuki Takei, Naoyuki Tagami, Hiromi Murasawa, Reiko Ikeda
Trichosporon asahii is a pathogenic basidiomycetous yeast. Individual strains of T. asahii have different colony morphologies. However, it is not clear whether cell surface phenotypes differ among the colony morphologies. Here we characterized the cell surface hydrophobicity and analyzed the carbohydrate contents of the cell surface polysaccharides in T. asahii clinical isolates with various colony morphologies. Among the three distinctive colony morphologies obtained from one clinical isolate, the white-type morphology exhibited higher hydrophobicity...
November 8, 2016: Yeast
https://www.readbyqxmd.com/read/27816903/molecular-and-antifungal-susceptibility-study-on-trichosporonemia-and-emergence-of-trichosporon-mycotoxinivorans-as-a-bloodstream-pathogen
#3
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/27799926/invasive-trichosporon-infection-a-systematic-review-on-a-re-emerging-fungal-pathogen
#4
REVIEW
João N de Almeida Júnior, Christophe Hennequin
Objectives: This review aimed to better depict the clinical features and address the issue of therapeutic management of Trichosporon deep-seated infections. Methods: We comprehensively reviewed the cases of invasive Trichosporon infection reported in the literature from 1994 (date of taxonomic modification) to 2015. Data from antifungal susceptibility testing (AST) studies were also analyzed. Results: Two hundred and three cases were retained and split into four groups: homeopathy (n = 79), other immunodeficiency conditions (n = 41), miscellaneous (n = 58) and newborns (n = 25)...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27794247/diversity-of-spoilage-fungi-associated-with-various-french-dairy-products
#5
Lucille Garnier, Florence Valence, Audrey Pawtowski, Lizaveta Auhustsinava-Galerne, Nicolas Frotté, Riccardo Baroncelli, Franck Deniel, Emmanuel Coton, Jérôme Mounier
Yeasts and molds are responsible for dairy product spoilage, resulting in significant food waste and economic losses. Yet, few studies have investigated the diversity of spoilage fungi encountered in dairy products. In the present study, 175 isolates corresponding to 105 from various spoiled dairy products and 70 originating from dairy production environments, were identified using sequencing of the ITS region, the partial β-tubulin, calmodulin and/or EFα genes, and the D1-D2 domain of the 26S rRNA gene for filamentous fungi and yeasts, respectively...
October 21, 2016: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/27784941/study-on-antioxidant-enzymatic-activities-of-trichosporon-asahii
#6
Yangmei Zhang, Haitao Li, Rongya Yang, Congmin Wang
Superoxide dismutase (SOD) and catalase are considered the most important antioxidant enzymes which protect fungus from the oxidant damage of reactive oxygen species. In this study, we collected 44 strains of Trichosporon asahii (T. asahii) from different sources and investigated their SOD and catalase activities. The results showed that the SOD and catalase activities of Clinical group were significantly higher than those of Environment group (p < 0.01). The SOD and catalase activities of T. asahii in Internal passage group went up gradually after passage in mice, and were significantly higher in 5th generation of Internal passage group (p < 0...
December 2016: Indian Journal of Microbiology
https://www.readbyqxmd.com/read/27782810/a-case-report-of-a-cystic-fibrosis-patient-with-repeated-isolation-of-trichosporon-mycotoxinivorans-identified-by-a-novel-short-extraction-method
#7
Daniel Goldenberger, Vladimira Hinić, Spasenija Savic Prince, Michael Tamm, Anna-Maria Balestra, Doris Hohler, Reno Frei
BACKGROUND: Trichosporon mycotoxinivorans is a recently described yeast-like fungal organism and its association as a pathogen for patients with cystic fibrosis (CF) was reported previously. We show the clinical course of a CF patient over 9 years as well as the applications of modern molecular and proteomic identification techniques of this rare fungus. CASE PRESENTATION: We present the case of a 32-year-old male CF patient with sputum cultures continuously positive with the anamorphic yeast T...
October 25, 2016: BMC Infectious Diseases
https://www.readbyqxmd.com/read/27697432/antifungal-activities-of-tacrolimus-in-combination-with-antifungal-agents-against-fluconazole-susceptible-and-fluconazole-resistant-trichosporon-asahii-isolates
#8
Thaís Felli Kubiça, Laura Bedin Denardi, Maria Isabel Azevedo, Vanessa Oliveira, Luiz Carlos Severo, Janio Morais Santurio, Sydney Hartz Alves
The antifungal activity of tacrolimus in combination with antifungal agents against different fungal species has been previously reported. Here we report the in vitro interactions between tacrolimus and amphotericin B, fluconazole, itraconazole, and caspofungin against 30 clinical isolates of both fluconazole-susceptible and fluconazole-resistant Trichosporon asahii. For these analyses, we used the broth microdilution method based on the M27-A3 technique and checkerboard microdilution method. Tacrolimus showed no activity against T...
September 30, 2016: Brazilian Journal of Infectious Diseases
https://www.readbyqxmd.com/read/27664738/comparative-genome-analysis-of-the-oleaginous-yeast-trichosporon-fermentans-reveals-its-potential-applications-in-lipid-accumulation
#9
Qi Shen, Yue Chen, Danfeng Jin, Hui Lin, Qun Wang, Yu-Hua Zhao
In this work, Trichosporon fermentans CICC 1368, which has been shown to accumulate cellular lipids efficiently using industry-agricultural wastes, was subjected to preliminary genome analysis, yielding a genome size of 31.3 million bases and 12,702 predicted protein-coding genes. Our analysis also showed a high degree of gene duplications and unique genes compared with those observed in other oleaginous yeasts, with 3-4-fold more genes related to fatty acid elongation and degradation compared with those in Rhodosporidium toruloides NP11 and Yarrowia lipolytica CLIB122...
November 2016: Microbiological Research
https://www.readbyqxmd.com/read/27663203/epidemiology-and-fungal-species-distribution-of-superficial-mycoses-in-northeast-brazil
#10
W P Silva-Rocha, M F de Azevedo, G M Chaves
OBJECTIVE: Dermatomycoses are superficial fungal infections which affect the skin, hair and nails of humans and animals. Male and female patients of all ages are affected by this condition. The main etiological agents of dermatomycoses are the dermatophytes fungi of the genera Trichophyton, Microsporum and Epidermophyton, while the main yeasts belong to the genera Candida, Malassezia and Trichosporon. The variation in the distribution of dermatomycoses worldwide justify the conduction of epidemiological studies in order to contribute for the better understanding of patterns of mycological cutaneous infections...
September 20, 2016: Journal de Mycologie Médicale
https://www.readbyqxmd.com/read/27580597/apiotrichum-terrigenum-sp-nov-a-novel-soil-associated-yeast-found-in-both-the-uk-and-mainland-europe
#11
Steve A James, Chris J Bond, Rachael Stanley, Sreenivas R Ravella, Gabor Peter, Denes Dlauchy, Ian N Roberts
Five arthroconidium-producing yeast strains representing a novel Trichosporon-like species were independently isolated from the UK, Hungary and Norway. Two strains (Bio4T and Bio21) were isolated from a biogas reactor, with a third strain (S8) isolated from soil collected at the same UK site. Two additional strains were isolated in mainland Europe, one from soil in Norway (NCAIM Y.02175) and the other from sewage in Hungary (NCAIM Y.02176). Sequence analyses of the D1/D2 domains of the large subunit (LSU) rRNA gene and internal transcribed spacer (ITS) region indicated that the novel species belongs to the recently resurrected genus Apiotrichum, and is most closely related to Apiotrichum scarabaeorum, a beetle-associated species first found in South Africa...
August 31, 2016: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/27567919/biophysical-effects-of-a-polymeric-biosurfactant-in-candida-krusei-and-candida-albicans-cells
#12
Gabriella Freitas Ferreira, Bruna Lorrana Dos Santos Pinto, Eliene Batista Souza, José Lima Viana, Adrielle Zagmignan, Julliana Ribeiro Alves Dos Santos, Áquila Rodrigues Costa Santos, Priscila Batista Tavares, Ângelo Márcio Leite Denadai, Andrea Souza Monteiro
This study evaluated the effects of a polymeric biosurfactant produced by Trichosporon montevideense CLOA72 in the adhesion of Candida albicans and Candida krusei cells to human buccal epithelial cells and its interference in biofilm formation by these strains. The biofilm inhibition by biosurfactant (25 mg/mL) in C. krusei and C. albicans in polystyrene was reduced up to 79.5 and 85 %, respectively. In addition, the zeta potential and hydrodynamic diameter of the yeasts altered as a function of the biosurfactant concentration added to the cell suspension...
August 27, 2016: Mycopathologia
https://www.readbyqxmd.com/read/27525399/-determination-of-candida-colonization-and-candida-score-in-patients-in-anesthesia-intensive-care-unit
#13
Günhan Gökahmetoğlu, Fatma Mutlu Sarıgüzel, Ayşe Nedret Koç, Orhan Behret, Selma Gökahmetoğlu, Mustafa Altay Atalay, Ferhan Elmalı, Kamil Darçın
The colonization rate of Candida spp. reaches up to 80% in patients who reside in intensive care units (ICUs) more than a week, and the mean rate of development of invasive disease is 10% in colonized patients. Since invasive candidiasis (IC) in ICU patients presents with septic shock and high mortality rate, rapid diagnosis and treatment are crucial. The aim of this study was to assess the relationship between invasive infection and the determination of Candida colonization index (CI) and Candida score (CS) in patients admitted to ICU who are at high risk for IC and likely to benefit from early antifungal therapy...
July 2016: Mikrobiyoloji Bülteni
https://www.readbyqxmd.com/read/27518570/yeasts-from-macroalgae-and-lichens-that-inhabit-the-south-shetland-islands-antarctica
#14
Alysson Wagner Fernandes Duarte, Michel Rodrigo Zambrano Passarini, Tiago Palladino Delforno, Franciane Maria Pellizzari, Caio Vinicius Zecchin Cipro, Rosalinda Carmela Montone, Maria Virginia Petry, Jair Putzke, Luiz Henrique Rosa, Lara Durães Sette
Antarctic terrestrial ecosystems are largely dominated by lichens, while shallow coastal environments are mainly covered by macroalgae. The aim of this study was to isolate and to evaluate the diversity of yeasts in different species of macroalgae and lichens collected in South Shetland Islands, Antarctica. A total of 405 yeasts were recovered (205 from macroalgae and 200 from lichens). The yeast community from macroalgae was most diversity than the yeast community from lichen. The dominance index was similar for both substrates...
August 12, 2016: Environmental Microbiology Reports
https://www.readbyqxmd.com/read/27510894/an-unusual-case-of-white-piedra-due-to-trichosporon-inkin-mimicking-trichobacteriosis
#15
Kaiwen Zhuang, Xin Ran, Yaling Dai, Jiaoqing Tang, Qin Yang, Sushmita Pradhan, Yuping Ran
White piedra is a superficial mycosis characterized by soft, white-to-tan, irregular nodules attached to the hair shafts. A 36-year-old man presented with small lumps in his pubic hair, without any other symptoms. The clinical features were suggestive of trichobacteriosis. Pathology analysis of the infected hair revealed that the concretions surrounding the hair shaft were full of fungal elements, parts of which had invaded into the cuticle. Culture on Sabouraud dextrose agar grew creamy, yellow-white colonies identified as Trichosporon inkin by the sequence of the nuclear ribosomal intergenic spacer region...
August 10, 2016: Mycopathologia
https://www.readbyqxmd.com/read/27495321/fungemia-due-to-rare-opportunistic-yeasts-data-from-a-population-based-surveillance-in-spain
#16
Mario Fernández-Ruiz, Jesús Guinea, Mireia Puig-Asensio, Óscar Zaragoza, Benito Almirante, Manuel Cuenca-Estrella, José María Aguado
Fungemia due to rare yeasts constitutes an emerging but poorly investigated condition. Data on risk factors, clinical features, therapy, and outcome of episodes of fungemia due to rare (non-Candida, non-Cryptococcus) yeasts were analyzed in a population-based surveillance program conducted in 29 Spanish hospitals between May 2010 and April 2011. Species identification (DNA sequencing) and antifungal susceptibility testing (EUCAST and CLSI methods) were centrally performed. Fourteen out of 767 episodes of fungemia (1...
August 4, 2016: Medical Mycology: Official Publication of the International Society for Human and Animal Mycology
https://www.readbyqxmd.com/read/27494105/production-of-bioactive-protein-hydrolysate-using-the-yeasts-isolated-from-soft-chhurpi
#17
Amit Kumar Rai, Reena Kumari, Samurailatpam Sanjukta, Dinabandhu Sahoo
The aim of this work was to study the production of bioactive protein hydrolysates using yeasts isolated from chhurpi. For this, a total of 125 proteolytic yeasts were isolated and molecular identification was carried out by analysis of the restriction digestion pattern generated by digesting the PCR amplified internal transcribed spacer region and 5.8S rRNA gene (ITS1-5.8S-ITS2) using three endonucleases (HaeIII, CfoI and HinfI). The results obtained showed that different proteolytic yeasts were dominant in marketed products (Kluyveromyces marxianus and Issatchenkia orientalis) and samples from production centers (Trichosporon asahii, Saccharomyces cerevisiae and Exophiala dermatitidis)...
November 2016: Bioresource Technology
https://www.readbyqxmd.com/read/27441826/inhibitor-degradation-and-lipid-accumulation-potentials-of-oleaginous-yeast-trichosporon-cutaneum-using-lignocellulose-feedstock
#18
Juan Wang, Qiuqiang Gao, Huizhan Zhang, Jie Bao
Oleaginous yeast Trichosporon cutaneum is robust to high levels of lignocellulose derived inhibitor compounds with considerable lipid accumulation capacity. The potential of lipid accumulation of T. cutaneum ACCC 20271 was investigated using corn stover hydrolysates with varying sugar and inhibitor concentrations. Biodiesel was synthesized using the extracted lipid and the product satisfied the ASTM standards. Among the typical inhibitors, T. cutaneum ACCC 20271 is relatively sensitive to furfural and 4-hydroxybenzaldehyde, but strongly tolerant to high titers of formic acid, acetic acid, levulinic acid, HMF, vanillin, and syringaldehyde...
October 2016: Bioresource Technology
https://www.readbyqxmd.com/read/27440871/global-deceleration-of-gene-evolution-following-recent-genome-hybridizations-in-fungi
#19
Sira Sriswasdi, Masako Takashima, Ri-Ichiroh Manabe, Moriya Ohkuma, Takashi Sugita, Wataru Iwasaki
Polyploidization events such as whole-genome duplication and inter-species hybridization are major evolutionary forces that shape genomes. Although long-term effects of polyploidization have been well-characterized, early molecular evolutionary consequences of polyploidization remain largely unexplored. Here, we report the discovery of two recent and independent genome hybridizations within a single clade of a fungal genus, Trichosporon Comparative genomic analyses revealed that redundant genes are experiencing decelerations, not accelerations, of evolutionary rates...
August 2016: Genome Research
https://www.readbyqxmd.com/read/27425395/recurrent-trichosporonosis-with-central-nervous-system-involvement-in-an-allogeneic-hematopoietic-stem-cell-transplant-recipient
#20
S Y Thien, S J Chung, A L Tan, W Y K Hwang, B H Tan, T T Tan
Trichosporon is an ubiquitous yeast that has emerged as an opportunistic pathogen in the immunocompromised host. We describe a case of invasive trichosporonosis in an allogeneic hematopoietic stem cell transplantation (allo-HSCT) recipient while on caspofungin antifungal prophylaxis. She developed disseminated trichosporonosis in the pre-engraftment period and was successfully treated with voriconazole. She later developed 2 further episodes of invasive trichosporonosis involving the central nervous system...
July 18, 2016: Transplant Infectious Disease: An Official Journal of the Transplantation Society
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