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trichosporon asahii

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https://www.readbyqxmd.com/read/28895710/-trichosporon-asahii-sepsis-associated-with-urinary-catheter-in-a-pediatric-burn-unit-2-case-reports
#1
Florencia Escarrá, Jimena Lema, Beatriz Caracciolo, Susana Carnovale, Verónica Alvarez, Nidia Tramonti, Fabián Guarracino, M Teresa Rosanova
Trichosporon asahii is a ubiquitous fungus that has been isolated as part of human microbiota. There has been an emergence of this pathogen in recent years, causing superficial and deep seated infections. There are scarce reports of urinary tract infections in pediatric intensive care burn units caused by this agent. We describe the cases of 2 pediatric patients with prolonged hospitalization due to severe burns that had received several antibiotic courses for previous infections. Both presented sepsis secondary to catheter related urinary tract infection by Trichosporon asahii...
October 1, 2017: Archivos Argentinos de Pediatría
https://www.readbyqxmd.com/read/28871863/the-hiv-aspartyl-protease-inhibitor-ritonavir-impairs-planktonic-growth-biofilm-formation-and-proteolytic-activity-in-trichosporon-spp
#2
Rossana de Aguiar Cordeiro, Rosana Serpa, Patrícia Bruna Leite Mendes, Antonio José de Jesus Evangelista, Ana Raquel Colares Andrade, Jônatas da Silva Franco, Vandbergue Dos Santos Pereira, Lucas Pereira de Alencar, Jonathas Sales de Oliveira, Zoilo Pires de Camargo, Reginaldo Gonçalves de Lima Neto, Débora de Souza Collares Maia Castelo-Branco, Raimunda Samia Nogueira Brilhante, Marcos Fabio Gadelha Rocha, José Júlio Costa Sidrim
This study evaluated the effect of the protease inhibitor ritonavir (RIT) on Trichosporon asahii and Trichosporon inkin. Susceptibility to RIT was assessed by the broth microdilution assay and the effect of RIT on protease activity was evaluated using azoalbumin as substrate. RIT was tested for its anti-biofilm properties and RIT-treated biofilms were assessed regarding protease activity, ultrastructure and matrix composition. In addition, antifungal susceptibility, surface hydrophobicity and biofilm formation were evaluated after pre-incubation of planktonic cells with RIT for 15 days...
September 2017: Biofouling
https://www.readbyqxmd.com/read/28855483/current-status-of-taxonomy-of-pathogenic-yeasts
#3
Takashi Sugita, Otomi Cho, Masako Takashima
Fungal taxonomy has been reconstructed on the basis of genome information, and new nomenclatural rules have been enacted from 2013. It has been proposed that Cryptococcus neoformans and Cryptococcus gattii be reclassified into two species (C. neoformans and Cryptococcus deneoformans) and five species (C. gattii, Cryptococcus bacillisporus, Cryptococcus deuterogattii, Cryptococcus tetragattii, and Cryptococcus decagattii), respectively. The genus Trichosporon has been reclassified into five genera. Trichosporon asahii, which is the causative agent of trichosporonosis, has been retained in the genus Trichosporon, while Trichosporon cutaneum has been transferred into a new genus, Cutaneotrichosporon...
2017: Medical Mycology Journal
https://www.readbyqxmd.com/read/28720316/pigeons-and-their-droppings-as-reservoirs-of-candida-and-other-zoonotic-yeasts
#4
Inmaculada Rosario Medina, Lorena Román Fuentes, Miguel Batista Arteaga, Fernando Real Valcárcel, Félix Acosta Arbelo, Daniel Padilla Del Castillo, Soraya Déniz Suárez, Otilia Ferrer Quintana, Belinda Vega Gutiérrez, Freddy Silva Sergent, Begoña Acosta-Hernández
BACKGROUND: The importance of pigeons as reservoirs and carriers of Cryptococcus neoformans and other species of this genus is well-known; however, less is known about their role as reservoirs and carriers of other yeasts that impact public health. AIMS: The present study was performed on Gran Canaria Island to define yeasts other than Cryptococcus spp. that have been reported to impact public health and which could be carried by pigeons. METHODS: Samples were obtained from 83 pigeon lofts (Columba livia); moreover, 331 crop samples, 331 cloacal samples and 174 dropping samples were collected...
July 15, 2017: Revista Iberoamericana de Micología
https://www.readbyqxmd.com/read/28584756/disseminated-cutaneous-trichosporonosis-in-an-adult-bone-marrow-transplant-patient
#5
A M Y Yong, S S Yang, K B Tan, S A Ho
The Trichosporon species are yeast-like opportunistic pathogens in immunocompromised patients. Trichosporon asahii infections have been reported in pediatric bone marrow transplant (BMT) patients. However, its incidence is low in the adult literature. A 52-year-old Chinese woman who was diagnosed with acute myeloid leukemia received induction chemotherapy and underwent allogenic bone marrow transplant, which was complicated by a relapse and required salvage chemotherapy. She developed persistent non-neutropenic fever secondary to presumed hepatosplenic candidiasis...
May 2017: Indian Dermatology Online Journal
https://www.readbyqxmd.com/read/28566664/remarkable-works-and-cases-in-the-history-of-medical-mycology-in-japan
#6
Katsutaro Nishimoto
Several pathogenic fungi and cases related to Japanese medical mycologists were reviewed. Trichosporon inkin (as Sarcinomyces inkin) was reported as a pathogen of scrotal lesion by Oho in 1921, and Trichosporon asahii was isolated from generalized keratotic lesions in 1922 by Akagi in Japan. They were once included in Trichophyton beigelii, but then based on revision using DNA molecular technology, were returned to their original names.Microsporum ferrugineum was reported by Ota as a causative dermatophyte of tinea capitis in Japan and surrounding areas...
2017: Medical Mycology Journal
https://www.readbyqxmd.com/read/28562512/an-unusual-cause-of-fever-and-rash-in-a-child-with-severe-aplastic-anemia
#7
Elis Yuexian Lee, Wen Quan Derrick Lian, Prasad Iyer, Rajat Bhattacharyya
A 4-year-old girl with severe aplastic anemia and 2 previous failed T-depleted haploidentical peripheral blood stem cell transplants developed persistent neutropenic fever and multiple erythematous maculopapular rashes 2 days after her third T-replete haploidentical bone marrow transplant. Skin biopsy confirmed the diagnosis of Trichosporon asahii infection. She was on caspofungin prophylaxis which is not effective against Trichosporon. A high index of suspicion, prompt investigation, and appropriate treatment with voriconazole for 4 months was instrumental in controlling the infection and she remains well presently 9 months posttransplant with full donor chimerism and free from infection...
May 29, 2017: Journal of Pediatric Hematology/oncology
https://www.readbyqxmd.com/read/28510690/trichosporonosis-in-pediatric-patients-with-a-hematologic-disorder
#8
Catherine E Foster, Morven S Edwards, Julienne Brackett, Deborah A Schady, C Mary Healy, Carol J Baker
Background.: Trichosporonosis is an emerging and often fatal opportunistic fungal infection in immunocompromised patients, particularly those with hematologic malignancy, but data in children are lacking. Methods.: We report here 3 cases of invasive infection caused by Trichosporon asahii in pediatric patients with acute lymphoblastic leukemia at Texas Children's Hospital in Houston, Texas. We also conducted a literature review and identified 16 additional reports of pediatric patients with invasive T asahii infection and an underlying malignant or nonmalignant hematologic disorder...
May 16, 2017: Journal of the Pediatric Infectious Diseases Society
https://www.readbyqxmd.com/read/28506251/diversity-in-vitro-virulence-traits-and-antifungal-susceptibility-pattern-of-gastrointestinal-yeast-flora-of-healthy-poultry-gallus-gallus-domesticus
#9
Supram Hosuru Subramanya, Nawal Kishor Sharan, Bharat Prasad Baral, Deependra Hamal, Niranjan Nayak, Peralam Yegneswaran Prakash, Brijesh Sathian, Indira Bairy, Shishir Gokhale
BACKGROUND: Poultry farming and consumption of poultry (Gallus gallus domesticus) meat and eggs are common gastronomical practices worldwide. Till now, a detailed understanding about the gut colonisation of Gallus gallus domesticus by yeasts and their virulence properties and drug resistance patterns in available literature remain sparse. This study was undertaken to explore this prevalent issue. RESULTS: A total of 103 specimens of fresh droppings of broiler chickens (commercial G domesticus) and domesticated chickens (domesticated G domesticus) were collected from the breeding sites...
May 15, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28458355/growth-inhibition-of-an-opportunistic-yeast-pathogen-trichosporon-asahii-by-staphylococcus-epidermidis
#10
Reiko Ikeda, Yuki Ogasawara, Kazuhiko Takatori, Tomoe Ichikawa, Miki Nakajima, Kazuko Harigaya, Miho Watanabe, Erika Okudaira, Hanari Yoshikawa, Kazuki Yanagisawa
In the co-culture of Staphylococcus epidermidis and Trichosporon asahii, a fungal pathogen, it was observed that live S. epidermidis inhibited the growth of T. asahii. Soluble active anti-T. asahii substances were speculated to be produced by S. epidermidis in culture medium. Using (1)H- and (13)C-NMR spectra and electron ionization-high resolution mass spectrometry (HR-negative-FAB-MS), we separated the active molecule and identified it as lactic acid. Commercially available L-lactic acid and D-lactic acid inhibited the growth of T...
2017: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/28439501/the-cell-biology-of-the-trichosporon-host-interaction
#11
REVIEW
Cláudio Duarte-Oliveira, Fernando Rodrigues, Samuel M Gonçalves, Gustavo H Goldman, Agostinho Carvalho, Cristina Cunha
Fungi of the genus Trichosporon are increasingly recognized as causative agents of superficial and invasive fungal disease in humans. Although most species are considered commensals of the human skin and gastrointestinal tract, these basidiomycetes are an increasing cause of fungal disease among immunocompromised hosts, such as hematological patients and solid organ transplant recipients. The initiation of commensal or pathogenic programs by Trichosporon spp. involves the adaptation to the host microenvironment and its immune system...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28340200/cytokines-profile-in-immunocompetent-mice-during-trichosporon-asahii-infection
#12
Alexandra M Montoya, Gloria M González, Azalia M Martinez-Castilla, Sonia A Aguilar, Moises A Franco-Molina, Erika Coronado-Cerda, Adrián G Rosas-Taraco
Trichosporon asahii is an opportunistic yeastlike fungus commonly associated with systemic infections in immunocompromised patients. Neutropenia is recognized as the main risk factor in infections by T. asahii; however, little is known about the cytokine response during trichosporonosis. Here, we evaluated systemic and local cytokine production and histological damage in immunocompetent mice during systemic infection with T. asahii. We found a significant increased presence of G-CSF, TNF-α, IFN-γ, and IL-6 in sera samples...
March 15, 2017: Medical Mycology: Official Publication of the International Society for Human and Animal Mycology
https://www.readbyqxmd.com/read/28339535/fungemia-due-to-rare-opportunistic-yeasts-data-from-a-population-based-surveillance-in-spain
#13
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 5, 2016: Medical Mycology: Official Publication of the International Society for Human and Animal Mycology
https://www.readbyqxmd.com/read/28303817/screening-of-invasive-fungal-infections-by-a-real-time-panfungal-pan-acf-polymerase-chain-reaction-assay-in-patients-with-haematological-malignancy
#14
COMPARATIVE STUDY
Malini Rajinder Capoor, Shikha Puri, Hitesh Raheja, Ritin Mohindra, Dinesh Kumar Gupta, Pradeep Kumar Verma, Ranadeep Chowdhary
BACKGROUND: Invasive fungal infection (IFI) is a fatal infection in haematology patients. There is an urgent need for reliable screening methods facilitating timely diagnosis and treatment. A real-time panfungal polymerase chain reaction (PCR) assay based on TaqMan technology targeting 18S ribosomal RNA gene was used to screen whole blood specimen obtained from series of Haematology malignancy patients for IFIs. MATERIALS AND METHODS: The panfungal (Pan-ACF) assay was employed to investigate specimen from 133 patients in duplicate with suspected IFI...
January 2017: Indian Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28250360/a-new-amino-acid-substitution-at-g150s-in-lanosterol-14-%C3%AE-demethylase-erg11-protein-in-multi-azole-resistant-trichosporon-asahii
#15
Hisako Kushima, Issei Tokimatsu, Hiroshi Ishii, Rie Kawano, Kentaro Watanabe, Jun-Ichi Kadota
The mechanisms of azole resistance in Trichosporon asahii have not yet been fully clarified. We previously showed that T. asahii has the ERG11 gene, coding lanosterol 14-α-demethylase (Erg11 protein; Erg11p), which is the primary target of azoles. A single amino acid substitution at G453R in Erg11p was found to induce changes in the affinity of this enzyme for azoles, especially fluconazole, in vitro. In the present study, we investigated the DNA sequences of the ERG11 gene using six different strains of clinically isolated T...
2017: Medical Mycology Journal
https://www.readbyqxmd.com/read/28144822/in-vitro-activity-of-berberine-alone-and-in-combination-with-antifungal-drugs-against-planktonic-forms-and-biofilms-of-trichosporon-asahii
#16
Lin Cong, Yong Liao, Suteng Yang, Rongya Yang
Trichosporon asahii (T. asahii) is an opportunistic pathogen that can cause life-threatening infections in immunocompromised patients, with high mortality rates up to 80% despite treated with antifungal drugs. The biofilms-forming ability of T. asahii on indwelling medical devices may account for the resistance to antifungal drugs. Berberine (BBR) has been demonstrated to have antifungal activity and synergistic effects in combination with antifungal drugs against pathogenic fungi. In the present study, the in vitro activities of BBR alone or combined with fluconazole (FLC), itraconazole (ITC), voriconazole (VRC), caspofungin (CAS) and amphotericin B (AMB) against planktonic forms and biofilms of 21 clinical T...
January 31, 2017: Mycopathologia
https://www.readbyqxmd.com/read/28141498/first-genotype-identification-of-trichosporon-asahii-in-sfax-tunisia
#17
Hayet Sellami, Houaida Trabelsi, Sourour Neji, Imen Amouri, Fatma Cheikhrouhou, Fattouma Makni, Ali Ayadi
PURPOSE: The objectives of our study were species identification and genotyping of Trichosporon isolates collected at the Parasitology and Mycology Laboratory in Sfax, Tunisia. METHODOLOGY: Molecular identification was carried out by analysing the IGS1 regions of the rDNA of 30 Trichosporon isolates. RESULTS: Trichosporon asahii was the most frequent species detected. Furthermore, four genotypes were identified in Tunisia: 1 (46.4 %), 4 (35...
April 2017: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28031829/summer-type-hypersensitivity-pneumonitis-in-a-patient-with-rheumatoid-arthritis-on-methotrexate-and-tacrolimus
#18
Hirotsugu Ohkubo, Minami Okayama, Kensuke Fukumitsu, Akio Niimi
A 59-year-old woman receiving methotrexate and tacrolimus for rheumatoid arthritis (RA) was referred to our hospital following bilateral ground-glass opacity observed in her chest X-ray and elevated serum KL-6. After methotrexate and tacrolimus cessation, shortness of breath developed and ground-glass opacity observed in the chest computed tomography rapidly worsened. Bronchoalveolar lavage showed increased lymphocytes, and trans-bronchial lung biopsy confirmed lymphocytic alveolitis. In addition, the patient had serum antibodies against Trichosporon asahii, a fungal pathogen...
November 2016: Respirology Case Reports
https://www.readbyqxmd.com/read/27930704/in-vitro-antifungal-activity-of-sertraline-and-synergistic-effects-in-combination-with-antifungal-drugs-against-planktonic-forms-and-biofilms-of-clinical-trichosporon-asahii-isolates
#19
Lin Cong, Yong Liao, Suteng Yang, Rongya Yang
Trichosporon asahii (T. asahii) is the major pathogen of invasive trichosporonosis which occurred mostly in immunocompromised patients. The biofilms formation ability of T. asahii may account for resistance to antifungal drugs and results a high mortality rate. Sertraline, a commonly prescribed antidepressant, has been demonstrated to show in vitro and in vivo antifungal activities against many kinds of pathogenic fungi, especially Cryptococcus species. In the present study, the in vitro activities of sertraline alone or combined with fluconazole, voriconazole, itraconazole, caspofungin and amphotericin B against planktonic forms and biofilms of 21 clinical T...
2016: PloS One
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
#20
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
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