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trichosporon asahii

Muneyoshi Kimura, Hideki Araoka, Hisashi Yamamoto, Shigeki Nakamura, Minoru Nagi, Satoshi Yamagoe, Yoshitsugu Miyazaki, Sho Ogura, Takashi Mitsuki, Mitsuhiro Yuasa, Daisuke Kaji, Kosei Kageyama, Aya Nishida, Yuki Taya, Hiroshi Shimazu, Kazuya Ishiwata, Shinsuke Takagi, Go Yamamoto, Yuki Asano-Mori, Naoyuki Uchida, Atsushi Wake, Shuichi Taniguchi, Akiko Yoneyama
Limited data are available on micafungin breakthrough fungemia (MBF), fungemia that develops on administration of micafungin, in patients with hematological disorders. We reviewed medical and microbiological records of patients with hematological disorders who developed MBF between January 2008 and June 2015. A total of 39 patients with MBF were identified and Candida (30 strains) and non- Candida (9 strains) fungal species were recognized as causative strains. Among 35 stored strains, C. parapsilosis (14 strains), Trichosporon asahii (7 strains), C...
March 12, 2018: Antimicrobial Agents and Chemotherapy
Sandeep Kotwal, Geeta Sumbali, Supriya Sharma, Sanjana Kaul
Dermatophytes are considered as the main pathogens responsible for onychomycosis, but recently successive isolations of yeast-like fungi from the infected nails has led to consider these also as primary agents of nail infections. Trichosporon species which are non-candidal, basidiomycetous, yeast-like, anamorphic fungi are commonly isolated from soil but they are also emerging as important etiological agents of onychomycosis. Three species of Trichosporon viz., T. asahii, T. asteroides and T. faecale were isolated from the infected nails of three female members of a family from district Doda of Jammu and Kashmir State...
March 3, 2018: Mycoses
Daniel Brustolin Ludwig, Luciana Erzinger Alves de Camargo, Najeh Maissar Khalil, Marcos Ereno Auler, Rubiana Mara Mainardes
Amphotericin B (AmB) is one of the most used drugs for the treatment of systemic fungal infections; however, the treatment causes several toxic manifestations, including nephrotoxicity and hemolytic anemia. Chitosan-coated poly(lactide-co-glycolide) (PLGA) nanoparticles containing AmB were developed with the aim to decrease AmB toxicity and propose the oral route for AmB delivery. In this work, the antifungal efficacy of chitosan-coated PLGA nanoparticles containing AmB was evaluated in 20 strains of fungus isolates from patients with vulvovaginal candidiasis (01 Candida glabrata and 03 Candida albicans), bloodstream infections (04 C...
March 1, 2018: Mycopathologia
Yukiko Abe, Tsutomu Kawasaki, Kazuhiro Shimaya, Toshihisa Ishikawa, Yuki Kata, Kaori Okayasu, Koji Unoura, Yoichi Nakamura
A 47-year old man presented to our hospital with a 6-month history of malaise, cough and dyspnea on exertion. Laboratory testing revealed the severe hyponatremia. A chest X-ray showed bilateral diffuse micronodules. Anti-Trichosporon asahii antibody and environmental provocation test were positive. Bronchoalveolar lavage fluid showed lymphocytosis and low CD4/8 ratio. The specimens obtained by transbronchial lung biopsy revealed alveolitis. Based on these findings, the patient was diagnosed as having summer-type hypersensitivity pneumonitis (SHP)...
2018: Arerugī, [Allergy]
L H Zhang, Y Tai, H Tong, X J Lei, C W Tang
No abstract text is available yet for this article.
February 2018: Journal of Gastroenterology and Hepatology
Pei-Hua Chen, Jui-Yu Chou
Microbes have evolved ways of interference competition to gain advantage over their ecological competitors. The use of secreted antagonistic compounds by yeast cells is one of the prominent examples. Although this killer behavior has been thoroughly studied in laboratory yeast strains, our knowledge of the antagonistic specificity of killer effects in nature remains limited. In this study, yeast strains were collected from various niches and screened for antagonistic activity against one toxin-sensitive strain of Saccharomyces cerevisiae and three pathogenic fungi...
March 30, 2017: Polish Journal of Microbiology
Pradeep Kumar Mada, Folusakin Ayoade, Ailing Li, John Todd
A 59-year-old man with a history of peripheral vascular disease status post femoral popliteal bypass presented with critical limb ischaemia of the left leg. An arterial Doppler ultrasound showed an occluded graft requiring an above knee amputation. Five days after surgery, the patient developed fever, leucocytosis, significant stump swelling and pain, and serosanguinous discharge from his wound. Wound swab cultures from the stump grew Trichosporon asahii A venous Doppler ultrasound revealed extensive thrombosis of the left lower extremity...
January 6, 2018: BMJ Case Reports
Robert Grignani, Evelyn Sc Koay, Swee Chye Quek, Christian Harkensee
No abstract text is available yet for this article.
November 2017: Annals of the Academy of Medicine, Singapore
Alexandra M Montoya, Mariana Elizondo-Zertuche, Rogelio de J Treviño-Rangel, Miguel Becerril-García, Gloria M González
BACKGROUND: Trichosporon asahii is a yeast-like fungus that has recently gained importance as a cause of opportunistic systemic infections. The pathogenicity and virulence factors of T. asahii remain largely unknown. Because of the association between invasive infections and the use of catheters and related devices, the ability of the microorganism to adhere and form biofilms may play an important role in the pathogenicity during a trichosporonosis. AIMS: The aim of this study is to identify an association between biofilm formation by T...
January 2018: Revista Iberoamericana de Micología
Haitao Li, Congmin Wang, Yong Chen, Shaoqiang Zhang, Rongya Yang
Trichosporon asahii (T. asahii) has emerged as a dangerous pathogen that causes rare but life-threatening infections. Its resistance to certain antifungal agents makes it difficult to treat, especially for patients undergoing long-term antibiotic therapy. In this study, we performed a series of fluconazole (FLC) perturbation experiments for two T. asahii strains, a clinical isolate stain CBS 2479 (T2) and an environmental isolate strain CBS 8904 (T8), to uncover potential genes and pathways involved in FLC resistance...
December 19, 2017: Scientific Reports
Toshihisa Ishikawa, Tsutomu Kawasaki, Kazuhiro Shimaya, Yukiko Abe, Yuki Kata, Kaori Okayasu, Koji Unoura, Yoichi Nakamura
We report two family members, a 64-year-old woman (patient 1) and her 37-year-old son (patient 2) diagnosed with summer-type hypersensitivity pneumonitis (SHP). Both patients had high serum titers of anti-Trichosporon asahii antibody. The patients lived in the same house and worked in the same barbershop. Patient 1 was diagnosed with SHP in the summer, and she reacted positively to the provocation test at the work place, but not in the house. Patient 2 was diagnosed with SHP in the winter. Generally, SHP develops and is diagnosed in the summer...
2017: Arerugī, [Allergy]
Alexandra M Montoya, Carolina E Luna-Rodríguez, Rogelio de J Treviño-Rangel, Miguel Becerril-García, Raquel G Ballesteros-Elizondo, Odila Saucedo-Cárdenas, Gloria M González
Trichosporon asahii is an opportunistic yeastlike fungus that colonizes the gastrointestinal and respiratory tracts and human skin. Although it is an important cause of disseminated infections by non-Candida species, there are a few reports related to its virulence factors and their possible role in in vivo pathogenicity. We developed a murine model of disseminated trichosporonosis in immunocompetent mice for the evaluation of the in vivo pathogenicity of 6 T. asahii isolates with different in vitro virulence factor profiles...
September 9, 2017: Medical Mycology: Official Publication of the International Society for Human and Animal Mycology
Morahem Ashengroph, Jahanshir Amini
40 isoeugenol-tolerant yeasts were isolated from the rhizosphere soil samples which in turn were collected from aromatic plants in different regions of Iran, and further tested for their ability to grow on a minimal medium containing isoeugenol as the sole carbon and energy source. Nine isolates which were able to grow on isoeugenol were examined for their ability to convert isoeugenol into vanillin under growing cell experiments. Of the tested yeasts, the highest conversion efficiency was observed in isolate MP24...
December 2017: 3 Biotech
Roberta S Valle, Lívia S Ramos, Vanessa J Reis, Mariangela Ziccardi, Marcos Dornelas-Ribeiro, Cátia L Sodré, Marta H Branquinha, André L S Santos
Trichosporon asahii is a fungal opportunistic pathogen that causes superficial and deep-seated infections presenting high mortality. Very little is known about the virulence attributes produced by this fungus. Herein, aspartic peptidase production was identified in Brazilian clinical isolates of T. asahii by different methodologies. Initially, T. asahii strain 250 (from skin lesion) was inoculated in both liquid and solid culture media containing bovine serum albumin (BSA) as the sole nitrogenous source. A translucent halo around the fungal colony was observed from the 5th day of culture...
December 2017: Microbiological Research
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
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
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
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
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
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
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