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https://www.readbyqxmd.com/read/28713362/biocontrol-agents-increase-the-specific-rate-of-patulin-production-by-penicillium-expansum-but-decrease-the-disease-and-total-patulin-contamination-of-apples
#1
Xiangfeng Zheng, Qiya Yang, Xiaoyun Zhang, Maurice T Apaliya, Giuseppe Ianiri, Hongyin Zhang, Raffaello Castoria
Synthetic fungicides are commonly employed for the control of postharvest diseases of fruits. However, due to health concerns about the use of these chemicals, alternative control methods including biocontrol based on antagonistic yeasts are gaining in popularity. In this study, we investigated the effects of two biocontrol yeasts, Rhodotorula mucilaginosa strain 3617 and Rhodotorula kratochvilovae strain LS11, on blue mold and patulin (PAT) contamination caused by Penicillium expansum strains PY and FS7 in artificially inoculated Fuji apples stored at 20°C for 9 days...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28701186/the-oral-fungal-mycobiome-characteristics-and-relation-to-periodontitis-in-a-pilot-study
#2
Brandilyn A Peters, Jing Wu, Richard B Hayes, Jiyoung Ahn
BACKGROUND: The oral fungal microbiome (mycobiome) is not well characterized, particularly in relation to oral diseases such as periodontal disease. We aimed to describe and compare the oral mycobiome of subjects with and without periodontal disease. RESULTS: We characterized the oral mycobiome in 30 adult subjects (15 with periodontal disease, 15 with good oral health) by sequencing the taxonomically informative pan-fungal internal transcribed spacer (ITS) gene in DNA extracted from oral wash samples...
July 12, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28695189/risk-of-fungal-infection-to-dental-patients
#3
Jaqueline Lopes Damasceno, Rafael Aparecido Dos Santos, Amir Horiquini Barbosa, Luciana Assirati Casemiro, Regina Helena Pires, Carlos Henrique Gomes Martins
Fungi can cause various diseases, and some pathogenic fungi have been detected in the water of dental equipment. This environment offers suitable conditions for fungal biofilms to emerge, which can facilitate mycological contamination. This study verified whether the water employed in the dental units of two dental clinics at the University of Franca was contaminated with fungi. This study also evaluated the ability of the detected fungi to form biofilms. The high-revving engine contained the largest average amount of fungi, 14...
2017: TheScientificWorldJournal
https://www.readbyqxmd.com/read/28681129/simultaneous-production-of-intracellular-triacylglycerols-and-extracellular-polyol-esters-of-fatty-acids-by-rhodotorula-babjevae-and-rhodotorula-aff-paludigena
#4
Luis A Garay, Irnayuli R Sitepu, Tomas Cajka, Erin Cathcart, Oliver Fiehn, J Bruce German, David E Block, Kyria L Boundy-Mills
Microbial oils have been analyzed as alternatives to petroleum. However, just a handful of microbes have been successfully adapted to produce chemicals that can compete with their petroleum counterparts. One of the reasons behind the low success rate is the overall economic inefficiency of valorizing a single product. This study presents a lab-scale analysis of two yeast species that simultaneously produce multiple high-value bioproducts: intracellular triacylglycerols (TG) and extracellular polyol esters of fatty acids (PEFA), two lipid classes with immediate applications in the biofuels and surfactant industries...
July 5, 2017: Journal of Industrial Microbiology & Biotechnology
https://www.readbyqxmd.com/read/28669678/virulence-and-antifungal-therapy-of-murine-disseminated-infection-by-rhodotorula-mucilaginosa
#5
Pamela Thomson, Loida López-Fernández, Josep Guarro, Javier Capilla
Rhodotorula infections have emerged in recent years causing mainly fungemia associated to high mortality. We have evaluated the in vitro activity of nine antifungal drugs against four clinical strains of Rhodotorula mucilaginosa, being amphotericin B, voriconazole and posaconazole the most active compounds. The experimental virulence of this fungus and the efficacy of the three mentioned drugs were evaluated in disseminated infections in neutropenic mice. Infection resulted in a high fungal load in all the organs studied without evident particular tropism...
June 16, 2017: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/28662427/oral-mycoses-in-avian-scavengers-exposed-to-antibiotics-from-livestock-farming
#6
Aida Pitarch, Concha Gil, Guillermo Blanco
The exposure to antimicrobial pharmaceuticals as environmental contaminants can exert direct and indirect detrimental effects on health of wildlife. Fungal infections pose a major threat to domestic, captive-housed wild and free-ranging wild animals worldwide. However, little is known about their role in disease in birds in the wild. Here, we evaluated the incidence of thrush-like lesions in the oral cavity of wild nestling cinereous vultures (Aegypius monachus), griffon vultures (Gyps fulvus), Egyptian vultures (Neophron percnopterus) and golden eagles (Aquila chrysaetos) exposed to veterinary antibiotics via the consumption of medicated livestock carcasses...
June 26, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28660362/antarctic-rocks-from-continental-antarctica-as-source-of-potential-human-opportunistic-fungi
#7
Vívian N Gonçalves, Fabio S Oliveira, Camila R Carvalho, Carlos E G R Schaefer, Carlos A Rosa, Luiz H Rosa
We assessed the diversity of culturable fungi associated with rocks of continental Antarctica to evaluate their physiological opportunistic virulence potential in vitro. The seventy fungal isolates obtained were identified as nine species of Acremonium, Byssochlamys, Cladosporium, Debaryomyces, Penicillium, and Rhodotorula. Acremonium sp., D. hansenii, P. chrysogenum, P. citrinum, P. tardochrysogenum, and R. mucilaginosa were able to grow at 37 °C; in addition, B. spectabilis displayed a high level of growth at 37 and 45 °C...
June 28, 2017: Extremophiles: Life Under Extreme Conditions
https://www.readbyqxmd.com/read/28648496/fruits-as-the-vehicle-of-drug-resistant-pathogenic-yeasts
#8
Hsiu-Jung Lo, Sheng-Hua Tsai, Wen-Li Chu, Yin-Zhi Chen, Zi-Li Zhou, Hong-Fu Chen, Ching-Fu Lee, Yun-Liang Yang
OBJECTIVE: We investigated the diversity and drug susceptibility of pathogenic yeasts on fruit surfaces. METHOD: Fruits were purchased from supermarkets and washed with buffer. The pellets were re-suspended in medium after centrifugation. The cell suspensions were plated onto CHROMagar Candida medium. Yeasts were identified by ribosomal DNA sequencing and their drug susceptibilities were determined by broth microdilution assay. RESULTS: Of 184 isolates, comprised of 55 species, from 22 different types of fruits, 29 species, including Candida famata, Candida fermentati, Candida guilliermondii, Candida intermedia, Candida krusei, Candida orthopsilosis, Candida parapsilosis, Candida pelliculosa, Candida tropicalis, and others have been reported to cause diseases in humans...
June 23, 2017: Journal of Infection
https://www.readbyqxmd.com/read/28639705/cloning-and-characterization-of-iron-superoxide-dismutase-in-antarctic-yeast-strain-rhodotorula-mucilaginosa-an5
#9
Guangfeng Kan, Hua Wen, Xiaofei Wang, Ting Zhou, Cuijuan Shi
A novel superoxide dismutase gene from Antarctic yeast Rhodotorula mucilaginosa AN5 was cloned, sequenced, and then expressed in Escherichia coli. The R. mucilaginosa AN5 SOD (RmFeSOD) gene was 639 bp open reading frame in length, which encoded a protein of 212 amino acids with a deduced molecular mass of 23.5 kDa and a pI of 7.89. RmFeSOD was identified as iron SOD type with a natural status of homodimer. The recombinant RmFeSOD showed good pH stability in the pH 1.0-9.0 after 1 h incubation. Meanwhile, it was found to behave relatively high thermostability, and maintained more than 80% activity at 50 °C for 1 h...
June 22, 2017: Journal of Basic Microbiology
https://www.readbyqxmd.com/read/28615057/erratum-to-engineering-an-efficient-and-tight-d-amino-acid-inducible-gene-expression-system-in-rhodosporidium-rhodotorula-species
#10
Yanbin Liu, Chong Mei John Koh, Si Te Ngoh, Lianghui Ji
No abstract text is available yet for this article.
June 14, 2017: Microbial Cell Factories
https://www.readbyqxmd.com/read/28597157/optimization-of-cultivation-conditions-for-biotechnological-production-of-lipid-by-rhodotorula-kratochvilovae-syn-rhodosporidium-kratochvilovae-sy89-for-biodiesel-preparation
#11
Tamene Milkessa Jiru, Marizeth Groenewald, Carolina Pohl, Laurinda Steyn, Nicholas Kiggundu, Dawit Abate
Rhodotorula kratochvilovae (syn, Rhodosporidium kratochvilovae) SY89, an oleaginous yeast, isolated from Ethiopian soil, was grown under nitrogen-limited media. The capacity this with respect to biomass production, lipid yield and lipid content was evaluated. The influence of inoculum size, carbon sources, variations in glucose concentration, nitrogen sources, C/N ratio, pH, temperature, agitation, and aeration rate and incubation period were investigated. Inoculum size of 10% v/v, glucose as a carbon source at 50 g/L glucose, 0...
June 2017: 3 Biotech
https://www.readbyqxmd.com/read/28560168/genome-sequence-of-the-oleaginous-yeast-rhodotorula-toruloides-strain-cgmcc-2-1609
#12
Christine Sambles, Sabine Middelhaufe, Darren Soanes, Dagmara Kolak, Thomas Lux, Karen Moore, Petra Matoušková, David Parker, Rob Lee, John Love, Stephen J Aves
Most eukaryotic oleaginous species are yeasts and among them the basidiomycete red yeast, Rhodotorula (Rhodosporidium) toruloides (Pucciniomycotina) is known to produce high quantities of lipids when grown in nitrogen-limiting media, and has potential for biodiesel production. The genome of the CGMCC 2.1609 strain of this oleaginous red yeast was sequenced using a hybrid of Roche 454 and Illumina technology generating 13 × coverage. The de novo assembly was carried out using MIRA and scaffolded using MAQ and BAMBUS...
September 2017: Genomics Data
https://www.readbyqxmd.com/read/28558761/production-characterization-and-antifungal-activity-of-a-biosurfactant-produced-by-rhodotorula-babjevae-ys3
#13
Suparna Sen, Siddhartha Narayan Borah, Arijit Bora, Suresh Deka
BACKGROUND: Sophorolipids are one of the most promising glycolipid biosurfactants and have been successfully employed in bioremediation and various other industrial sectors. They have also been described to exhibit antimicrobial activity against different bacterial species. Nevertheless, previous literature pertaining to the antifungal activity of sophorolipids are limited indicating the need for further research to explore novel strains with wide antimicrobial activity. A novel yeast strain, Rhodotorula babjevae YS3, was recently isolated from an agricultural field in Assam, Northeast India...
May 30, 2017: Microbial Cell Factories
https://www.readbyqxmd.com/read/28540503/hydroxy-al-and-cell-surface-negativity-are-responsible-for-the-enhanced-sensitivity-of-rhodotorula-taiwanensis-to-aluminum-by-increased-medium-ph
#14
Xue Qiang Zhao, Xue Min Bao, Chao Wang, Zuo Yi Xiao, Zhen Min Hu, Chun Li Zheng, Ren Fang Shen
Aluminum (Al) is ubiquitous and toxic to microbes. High Al(3+) concentration and low pH are two key factors responsible for Al toxicity, but our present results contradict this idea. Here, an Al-tolerant yeast strain Rhodotorula taiwanensis RS1 was incubated in glucose media containing Al with a continuous pH gradient from pH 3.1-4.2. The cells became more sensitive to Al and accumulated more Al when pH increased. Calculations using an electrostatic model Speciation Gouy Chapman Stern indicated that, the increased Al sensitivity of cells was associated with AlOH(2+) and Al(OH) 2(+) rather than Al(3+)...
May 24, 2017: Archives of Microbiology
https://www.readbyqxmd.com/read/28528384/effects-of-salts-contained-in-lignocellulose-derived-sugar-streams-on-microbial-lipid-production
#15
Zhu Chen, Caixia Wan
This study aimed at developing low-cost, robust non-sterile fermentation processes for microbial lipid production from lignocellulose-derived sugars. Three representative oleaginous yeasts, Lipomyces tetrasporus (NRRL Y-11562), Rhodotorula toruloides (NRRL Y-1091), and Yarrowia lipolytica (NRRL YB-437), were tested for lipid production via non-sterile fermentation. Under optimal non-sterile conditions, all the tested strains had good performance on salt tolerance and lipid production. L. tetrasporus (NRRL Y-11562) gave the highest lipid titer of 12...
May 20, 2017: Applied Biochemistry and Biotechnology
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
#16
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/28480087/rhodotorula-endogenous-endophthalmitis-a-novel-harbinger-of-the-injection-drug-epidemic-in-the-united-states
#17
Preston M Luong, Basilio Kalpakian, Lawrence J Jaeger, Timothy Lahey, Christopher B Chapman, Michael E Zegans
Endogenous endophthalmitis is a rare but feared infectious ocular complication of injection drug use (IDU). The recent opioid epidemic in the United States threatens to increase the incidence of this disease. We report the first case of endogenous endophthalmitis in the United States caused by the emerging fungal pathogen Rhodotorula in an injection drug user which led to no light perception vision (NLP). Worldwide experience with Rhodotorula endogenous endophthalmitis is limited, but existing cases suggest infection by this particular fungal genus has a grim prognosis...
2017: Case Reports in Infectious Diseases
https://www.readbyqxmd.com/read/28472673/phenylalanine-ammonia-lyase-from-arabidopsis-thaliana-atpal2-a-potent-mio-enzyme-for-the-synthesis-of-non-canonical-aromatic-alpha-amino-acids-part-ii-application-in-different-reactor-concepts-for-the-production-of-s-2-chloro-phenylalanine
#18
Alana Dreßen, Thomas Hilberath, Ursula Mackfeld, Jens Rudat, Martina Pohl
Phenylalanine ammonia lyase (PAL) from Arabidopsis thaliana (AtPAL2) is in general a very good catalyst for the amination of fluoro- and chloro-cinnamic acid derivatives yielding halogenated (S)-phenylalanine derivatives with ≥85% conversion and excellent ee values >99%. We have studied the application of this enzyme as whole cell biocatalyst and immobilized on the cellulose carrier Avicel(®) for the production of the hypertension drug precursor (S)-2-chloro-phenylalanine using batch, fed-batch, as well as continuous membrane reactor and plug-flow reactor...
May 1, 2017: Journal of Biotechnology
https://www.readbyqxmd.com/read/28371463/microbial-cell-disruption-for-improving-lipid-recovery-using-pressurized-co2-role-of-co2-solubility-in-cell-suspension-sugar-broth-and-spent-media
#19
Md Shamim Howlader, William Todd French, Sara A Shields-Menard, Marta Amirsadeghi, Magan Green, Neeraj Rai
The study of in situ gas explosion to lyse the triglyceride-rich cells involves the solubilization of gas (e.g., carbon dioxide, CO2 ) in lipid-rich cells under pressure followed by a rapid decompression, which allows the gas inside the cell to rapidly expand and rupture the cell from inside out. The aim of this study was to perform the cell disruption using pressurized CO2 as well as to determine the solubility of CO2 in Rhodotorula glutinis cell suspension, sugar broth media, and spent media. Cell disruption of R...
April 3, 2017: Biotechnology Progress
https://www.readbyqxmd.com/read/28344645/mimicking-lichens-incorporation-of-yeast-strains-together-with-sucrose-secreting-cyanobacteria-improves-survival-growth-ros-removal-and-lipid-production-in-a-stable-mutualistic-co-culture-production-platform
#20
Tingting Li, Chien-Ting Li, Kirk Butler, Stephanie G Hays, Michael T Guarnieri, George A Oyler, Michael J Betenbaugh
BACKGROUND: The feasibility of heterotrophic-phototrophic symbioses was tested via pairing of yeast strains Cryptococcus curvatus, Rhodotorula glutinis, or Saccharomyces cerevisiae with a sucrose-secreting cyanobacterium Synechococcus elongatus. RESULTS: The phototroph S. elongatus showed no growth in standard BG-11 medium with yeast extract, but grew well in BG-11 medium alone or supplemented with yeast nitrogen base without amino acids (YNB w/o aa). Among three yeast species, C...
2017: Biotechnology for Biofuels
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