Publications
| Title | Abstract | Year(sorted descending) Filter | PMID Filter |
|---|
| mycobiota and concentration of ochratoxin a in concentrated poultry feed from venezuela. | the main objective of this study was to evaluate the frequency distribution of mycobiota and the concentration of ochratoxin a (ota) in 50 samples from one company of commercial brand poultry feed produced in venezuela. the concentration of ota in the samples analyzed was determined using the competitive elisa method. the most frequently isolated genera of moulds were aspergillus (36%) and penicillium (20%). of these genera, the most frequently isolated species were aspergillus flavus, aspergill ... | 2009 | 19580016 |
| rhodotorula mucilaginosa lymphadenitis in an hiv-infected patient. | we report a case of lymphadenitis due to rhodotorula mucilaginosa in a man with well-controlled hiv infection. the diagnosis was established microbiologically by positive lymph tissue cultures, and clinically by responses of lymphadenitis to antifungal therapy. the patient was asymptomatic and was treated with itraconazole 200mg orally once daily as an outpatient. clinical response was evident within three weeks with improvement of lymphadenopathy on serial computed tomography scans. lymphadenop ... | 2009 | 18650109 |
| synthesis, characterization and antimicrobial activity of water soluble dendritic macromolecules. | several families of water soluble dendrimers were synthesized based on poly(propyleneoxide) amines (jeffamines) (p(1)). p(1)-core and branched units were constructed from both methylacrylate and ethylenediamine (p(2)-p(9), and generations 0-3 with -nh(2), -cooh functionalities). they were characterized by elemental analysis (ea), gel permeation chromatography (gpc), ft-ir, (1)h, and (13)c nmr. the antimicrobial activities of only water soluble compounds (p(1), p(3), p(4), p(6), p(7) and p(9)) we ... | 2009 | 18657884 |
| microwave-induced synthesis and anti-microbial activities of 7,10,11,12-tetrahydrobenzo[c]acridin-8(9h)-one derivatives. | some new substituted tetrahydroacridin-8-ones and diverse derivatives were synthesized by uncatalysed multi-component reaction of dimedone or cyclohexan-1,3-dione, alpha-naphthylamine and various (o,p,m)-substituted benzaldehydes. the in vitro anti-microbial activities of the prepared compounds were evaluated against some bacteria and fungi strains. the results suggested that, the products 2a-g and 4a-g exhibited good inhibitory effect against most of the tested organisms. especially, 2f, 2g, 4f ... | 2009 | 18718695 |
| results from the artemis disk global antifungal surveillance study, 1997 to 2007: 10.5-year analysis of susceptibilities of noncandidal yeast species to fluconazole and voriconazole determined by clsi standardized disk diffusion testing. | fluconazole in vitro susceptibility test results determined by the clsi m44-a disk diffusion method for 11,240 isolates of noncandidal yeasts were collected from 134 study sites in 40 countries from june 1997 through december 2007. data were collected for 8,717 yeast isolates tested with voriconazole from 2001 through 2007. a total of 22 different species/organism groups were isolated, of which cryptococcus neoformans was the most common (31.2% of all isolates). overall, cryptococcus (32.9%), sa ... | 2009 | 19005141 |
| identification, antifungal susceptibility and scanning electron microscopy of a keratinolytic strain of rhodotorula mucilaginosa: a primary causative agent of onychomycosis. | onychomycosis is a dermatological problem of high prevalence that mainly affects the hallux toenail. onychomycosis caused by the yeast rhodotorula mucilaginosa was identified using colony morphology, light microscopy, urease and carbohydrate metabolism in a 57-year-old immunocompetent patient from rio de janeiro, brazil. high-resolution scanning electron microscopy of nail fragments, processed by a noncoating method, led to the observation with fine detail of the structures of both nail and fung ... | 2009 | 19170752 |
| effects of temperature on metal tolerance and the accumulation of zn and pb by metal-tolerant fungi isolated from urban runoff treatment wetlands. | to investigate the ability of two fungi to accumulate zn and pb, the effect of temperature on their metal tolerance and possible mechanisms involved in metal accumulation. | 2009 | 19187150 |
| multiple responses optimization and modeling of lipase production by rhodotorula mucilaginosa mtcc-8737 using response surface methodology. | response surface methodology was employed to optimize culture medium for production of lipase with rhodotorula sp. mtcc 8737. in the first step, a plackett-burman design was used to evaluate the effects of different inducers qualitatively. of all the seven inducers tested, soybean oil showed significant influence on the lipase production. further, response surface studies were conducted to quantitatively optimize by considering linear, interactive, and quadratic effects of test variables. a nove ... | 2009 | 19190860 |
| stereoselective synthesis of (r)-3-quinuclidinol through asymmetric reduction of 3-quinuclidinone with 3-quinuclidinone reductase of rhodotorula rubra. | a novel nicotinamide adenine dinucleotide phosphate-dependent carbonyl reductase, 3-quinuclidinone reductase, was isolated from rhodotorula rubra jcm3782. the enzyme catalyzes the asymmetric reduction of 3-quinuclidinone to (r)-3-quinuclidinol. the gene encoding the enzyme was also cloned and sequenced. a 819-bp nucleotide fragment was confirmed to be the gene encoding the 3-quinuclidinone reductase by agreement of the internal amino acid sequences of the purified enzyme. the gene encodes a tota ... | 2009 | 19234697 |
| synthesis, raman, ft-ir, nmr spectroscopic data and antimicrobial activity of mixed aza-oxo-thia macrocyclic compounds. | mixed aza-oxo-thia macrocyclic ligands 1,3,5,11,13,15-hexaaza-6,10,16,20-tetraoxo-8,18-dithia-2,3,4:12,13,14-dipyridine cyclocosane (l(1)); 1,3,5,12,14,16-hexeaza-6,11,17,22-tetraoxo-8,9,19,20-tetrathia-2,3,4:13,14,15-dipyridine cyclodocosane (l(2)); 1,3,5,13,15,17-hexaaza-6,12,18,24-tetraoxo-9,21-dithia-2,3,4:14,15,16-dipyridine cyclotetracosane (l(3)) and 1,3,5,14,16,18-hexaaza-6,13,19,26-tetraoxo-9,10,22,23-tetrathia-2,3,4:15,16,17-dipyridine cyclohexacosane (l(4)) were synthesised. the struc ... | 2009 | 18417256 |
| rhodotorula mucilaginosa catheter-related fungaemia in a patient with multiple myeloma. | summary to date, there have been several case reports of rhodotorula infection in haematological patients, but none affecting patients with multiple myeloma (mm). we describe a 54-year-old man with mm receiving prophylaxis with fluconazole who was using a subclavian port-a-cath and presented two episodes of fungaemia caused by rhodotorula mucilaginosa. the first episode was resolved with oral itraconazole and neutropenia recovery. during the second episode, caspofungin was administered without s ... | 2009 | 20041994 |
| the transcriptional activator rfia is quorum-sensing regulated by cotranscription with the luxi homolog pcoi and is essential for plant virulence in pseudomonas corrugata. | the gram-negative phytopathogen pseudomonas corrugata has an acyl-homoserine lactone (ahl) quorum-sensing (qs) system called pcoi/pcor that is involved in virulence on tomato. this work identifies, downstream of pcoi, a gene designated rfia, which we demonstrate is directly linked to qs by cotranscription with pcoi. the deduced rfia protein contains a dna-binding domain characteristic of the luxr family but lacks the autoinducer-binding terminus characteristic of the qs luxr-family proteins. we ... | 2009 | 19888817 |
| meningitis caused by rhodotorula mucilaginosa in human immunodeficiency virus seropositive patient. | rhodotorula species may be responsible for systemic infection in immunocompromised patients. meningitis by rhodotorula species in human immunodeficiency virus (hiv) infected persons has been reported previously. we report a case of meningitis caused by rhodotorula mucilaginosa in a 36-year-old hiv seropositive male patient who presented with fever, altered sensorium and features of meningeal irritation i.e. neck rigidity. the cerebrospinal fluid (csf) cell counts were high, showing 150 cells/mm( ... | 2008 | 19893682 |
| phospholipase activity of yeasts from wild birds and possible implications for human disease. | over the last decades, reports on yeast infections in humans have increased especially with respect to immunocompromised individuals. phospholipases are enzymes which may be associated with pathogenic processes caused by opportunistic yeasts. phospholipase activity (ph.a.) was investigated in 163 isolates of 13 species of yeasts. a total of 133 isolates were obtained through the screening of a total of 768 cloacae of wild birds (group i: 182 birds of prey; group ii: 165 passeriformes and group i ... | 2008 | 18608940 |
| accumulation of prenyl alcohols by terpenoid biosynthesis inhibitors in various microorganisms. | squalene synthase inhibitors significantly accelerate the production of farnesol by various microorganisms. however, farnesol production by saccharomyces cerevisiae atcc 64031, in which the squalene synthase gene is deleted, was not affected by the inhibitors, indicating that farnesol accumulation is enhanced in the absence of squalene synthase activity. the combination of diphenylamine as an inhibitor of carotenoid biosynthesis and a squalene synthase inhibitor increases geranylgeraniol product ... | 2008 | 18636253 |
| yeast diversity in the acidic rio agrio-lake caviahue volcanic environment (patagonia, argentina). | the rio agrio and lake caviahue system (rac), in northwestern patagonia, is a natural acidic environment. the aims of this study were to characterize the yeast community and to provide the first ecological assessment of yeast diversity of this extreme aquatic environment. yeast occurrence and diversity were studied at seven sites where the water ph varied between 1.8 and 6.7. yeast cfu counts in the river ranged from 30 to 1200 cfu l(-1), but in the lake the values were lower (30-60 cfu l(-1)). ... | 2008 | 18537834 |
| effect of aeration and agitation regimes on lipase production by newly isolated rhodotorula mucilaginosa-mtcc 8737 in stirred tank reactor using molasses as sole production medium. | the influence of media and process parameters (aeration and agitation) on fermentation broth rheology and biomass formation has been studied in 1.5-l stirred tank reactor for lipase production using rhodotorula mucilaginosa mtcc 8737. molasses, as sole production medium, is used for lipase production by varying aeration (1, 2, and 3 vvm) and agitation speeds (100, 200, and 300 rpm). maximum lipase activity of 72 u/ml was obtained during 96 h of fermentation at 2 vvm, 200 rpm, ph 7, and 25 +/- 2 ... | 2008 | 18574564 |
| interaction between glomus mosseae and soil yeasts on growth and nutrition of cowpea. | a glass house experiment was conducted to study the interaction between the mycorrhizal fungus, glomus mosseae and six soil yeasts (rhodotorula mucilaginosa, metschnikowia pulcherrima, trichosporon cutaneum var. cutaneum, saccharomyces cerevisiae, cryptococcus laurentii, debaryomyces occidentalis var. occidentalis), and their effect on growth and nutrition of cowpea. all the yeasts had a synergistic interaction with the mycorrhizal fungus and dual inoculation improved plant growth compared to si ... | 2008 | 17324563 |
| rhodotorula mucilaginosa as a cause of persistent femoral nonunion. | we present a case of postoperative infection which presented as nonunion fracture femur in a 30-year-old man due to rhodotorula mucilaginosa. this is the first report of rhodotorula infection in a patient with fracture nonunion. the patient underwent repeated surgical debridement and received intensive antibiotic therapy before the diagnosis was made. the diagnosis could have been made earlier if the fungal etiology had been suspected earlier. early suspicion and diagnosis of infection with atyp ... | 2008 | 18296801 |
| studies on the heterogeneity of the carotenogenic yeast rhodotorula mucilaginosa from patagonia, argentina. | the yeast species rhodotorula mucilaginosa is considered to be ubiquitous due to its world-wide distribution in terrestrial, freshwater and marine habitats, and to its ability to colonize a large variety of substrates. in this paper we assess the phenotypic and genetic variability of environmental isolates of r. mucilaginosa collected from natural and artificial environments in patagonia, argentina. a total of 97 strains were studied and sorted into three groups based on msp-pcr fingerprinting r ... | 2008 | 18383231 |
| isolation and characterization of a nitrobenzene degrading yeast strain from activated sludge. | strain z1 was isolated from nitrobenzene-contaminated sludge. strain z1 was able to utilize nitrobenzene as a sole source of carbon, nitrogen, and energy under aerobic condition. based on the morphology, physiological biochemical characteristics, and 26s rdna d1/d2 domain sequence, strain z1 was identified as rhodotorula mucilaginosa. strain z1 mineralized up to 450mg l(-1) nitrobenzene. kinetics of nitrobenzene degradation was described using the andrews equation. the kinetic parameters were as ... | 2008 | 18403111 |
| characterization of low-molecular-weight antiyeast metabolites produced by a food-protective lactobacillus-propionibacterium coculture. | we developed a ph-controlled batch fermentation process with separately immobilized cells of the protective coculture of lactobacillus paracasei subsp. paracasei sm20 and propionibacterium jensenii sm11 in supplemented whey permeate medium yielding cell-free supernatants with high antiyeast activity against candida pulcherrima and rhodotorula mucilaginosa. the antiyeast compounds were resistant to proteinase k and pronase e treatments and showed high heat resistance (121 degrees c for 15 min). d ... | 2008 | 19244902 |
| femoral prosthesis infection by rhodotorula mucilaginosa. | this case report is a case history of a femoral prosthesis infection caused by rhodotorula mucilaginosa in a human immunodeficiency virus patient. though the pathogenicity of this organism for bone tissue has been previously reported, this is the first reported case of an orthopedic prosthesis infection by this species of the genus rhodotorula. | 2008 | 18753353 |
| production of curcuminoids by escherichia coli carrying an artificial biosynthesis pathway. | curcuminoids, which are produced specifically by plants of the order zingiberales, have long been used as food additives because of their aromatic, stimulant and colouring properties and as traditional asian medicines because of their anti-tumour, antioxidant and hepatoprotective activities. curcuminoids are therefore attractive targets for metabolic engineering. an artificial curcuminoid biosynthetic pathway, including reactions of phenylalanine ammonia-lyase (pal) from the yeast rhodotorula ru ... | 2008 | 18757796 |
| rhodotorula infection. a systematic review of 128 cases from literature. | rhodotorula is an emerging opportunistic pathogen, particularly in immunocompromised patients. many cases of fungemia associated with catheters, endocarditis, peritonitis, meningitis, and endophthalmitis are infections incited by this yeast. the main purpose of this study was to review all cases of rhodotorula infection reported in the literature and to describe risk factors, underlying conditions and outcome. from 128 cases, 79% were fungemia (103 cases), 7% eye infections (nine cases) and 5% ( ... | 2008 | 18785780 |
| bioactive lipopeptides of ice-nucleating snow bacterium pseudomonas syringae strain 31r1. | the production of secondary metabolite lipopeptides by ice-nucleating pseudomonas syringae strain 31r1 was investigated. pseudomonas syringae strain 31r1 is a rifampicin-resistant derivative of p. syringae no. 31 used for the commercial production of snow. it is shown that p. syringae strain 31r1 produces antifungal lipodepsipeptides, syringomycins e and g, and, in addition, a novel and unique lipopeptide, peptin31. spectroscopic and spectrometric analyses revealed that peptin31 is a linear unde ... | 2008 | 18789127 |
| rhodotorula mucilaginosa catheter-related fungemia in a patient with sickle cell disease: case presentation and literature review. | rhodotorula mucilaginosa (formerly rhodotorula rubra) is a ubiquitous, environmental, urease-positive yeast that does not ferment sugars and can assimilate various carbohydrates. characterized by the salmon-pink to coral-red color of its colonies, rhodotorula mucilaginosa can disseminate and cause significant disease. we present a case of sustained rhodotorula mucilaginosa catheter-related fungemia in a patient with sickle cell anemia who refused removal of the implanted port. the patient remain ... | 2007 | 17330692 |
| prevalence of yeasts in beach sand at three bathing beaches in south florida. | the abundance and types of yeasts in the wet and dry sand of three recreational beaches in south florida were determined. samples were collected on 17 occasions between august 2001 and july 2002. after analyzing 102 sand samples, a total of 21 yeast species were identified by molecular methods. these isolates comprised four basidiomycetes and 17 ascomycetes and included eight species that had previously been reported from humans. the most frequently encountered yeasts were candida tropicalis and ... | 2007 | 17382990 |
| differentiation of candida albicans from non-albicans yeast directly from blood cultures by gram stain morphology. | clusters of pseudohyphae are commonly seen on gram stain of blood cultures from patients with candida albicans fungemia. whether this morphologic feature is useful for differentiating c. albicans from other yeasts has not previously been systematically evaluated. yeast morphology on gram stain of blood cultures from consecutive patients with fungemia detected by the bactec automated blood culture system was prospectively assessed and correlated with the final culture-based yeast identification. ... | 2007 | 17447090 |
| antifungal compounds from cultures of dairy propionibacteria type strains. | antifungal compounds from cultures of five type strains of dairy propionibacteria, as well as from the cultivation medium, were studied. cell-free supernatants and medium were fractionated by c(18) solid phase extraction. the aqueous 95% acetonitrile fractions were analyzed by gc-ms or subjected to reversed-phase hplc, to identify, quantify or isolate antifungal substances. the resulting hplc fractions were screened for antifungal activity against the mold aspergillus fumigatus and the yeast rho ... | 2007 | 17456184 |
| rhodotorula mucilaginosa: an unusual cause of oral ulcers in aids patients. | 2007 | 17457113 | |
| [biosorption ability of mutants of rhodotorula mucilaginosa ucm y-1776]. | twenty stable mutants with various coloration intensity have been allocated in carotene-synthesizing natural strain rhodotorula mucilaginosa ucm y-1776 (wild type) after nitrosoguanidine action. two brightly orange mutants 4l and 11 and one non-pigmented mutant 2 were chosen for the further researches. the ultraviolet was inefficient as a mutagen. resistance to high concentration of copper ions (up to 200 mg/g), high sorption ability (qmax = 9.1 mmol/g) was characteristic of r. mucilaginosa ucm ... | 2007 | 17494332 |
| meningitis caused by rhodotorula rubra in an human immunodeficiency virus infected patient. | rhodotorula spp. are common saprophytes but may be responsible for systemic infections in immunocompromised patients. meningitis caused by rhodotorula spp. in human immunodeficiency virus (hiv) infected patients has been reported only rarely. we present a case of meningitis caused by rhodotorula rubra in hiv infected patient. the presumptive diagnosis of cryptococcal meningitis was made on the basis of india ink preparation, gram staining and latex agglutination test (lat) for cryptococcal antig ... | 2007 | 17582194 |
| central venous catheter-associated fungemia due to rhodotorula spp. --a systematic review. | rhodotorula spp. are emergent opportunistic pathogens, particularly in immunocompromised individuals. they have been associated with endocarditis, peritonitis, meningitis endophthalmitis and catheter-associated fungemia. the aim of this study was to review all cases of central venous catheter-related fungemia due to rhodotorula spp. reported in the literature in order to determine the best management of this uncommon infection. all patients but one in the 88 cases examined had some form of under ... | 2007 | 17654271 |
| aspergillus and penicillium allergens: focus on proteases. | penicillium and aspergillus species are prevalent airborne fungi. it is imperative to identify and characterize their major allergens. alkaline and/or vacuolar serine proteases are major allergens of several prevalent penicillium and aspergillus species. they are also major immunoglobulin (ig) e-reacting components of the most prevalent airborne yeast, rhodotorula mucilaginosa, and the most prevalent cladosporium species, c. cladosporioides. ige cross-reactivity has been detected among these maj ... | 2007 | 17697643 |
| detection of pathogenic yeasts from processed fresh edible sea urchins sold in a fish market. | yeasts of 17 processed fresh edible (raw) sea urchins obtained from seven countries were analyzed. in total, 45 to 7 x 10(4) colony-forming units (cfu)/g of sea urchins were recovered, and 23 yeast species were identified. of these species, six pathogenic yeasts (candida albicans, c. sake, debaryomyces hansenii, pichia anomala, rhodotorula mucilaginosa, and trichosporon mucoides) were detected from 11 sea urchins (65%). as these yeasts are opportunistic pathogens, infections in healthy individua ... | 2007 | 17975532 |
| [assessment of the msp-pcr technique for the molecular characterization of rhodotorula mucilaginosa isolates from northwestern patagonia]. | the rapid identification of environmental or clinical yeast isolates is important for biodiversity studies and the detection of probable pathogens. rhodotorula mucilaginosa is a ubiquitous and pigmented yeast capable of infecting immunocompromised patients. in this study, we evaluated the micro/mini satellite-primed pcr (msp-pcr) fingerprinting method for the characterization and identification of r. mucilaginosa isolates from natural environments in northwestern patagonia. there were selected 1 ... | 2007 | 17990375 |
| intensive care unit environment contamination with fungi. | the purpose of the study was evaluation of the fungal presence in the environment of an intensive care unit. | 2007 | 18217434 |
| yeasts in high arctic glaciers: the discovery of a new habitat for eukaryotic microorganisms. | recently a new habitat for microbial life has been discovered at the base of polythermal glaciers. in ice from these subglacial environments so far only non-photosynthetic bacterial communities were discovered, but no eukaryotic microorganisms. we found high numbers of yeast cells, amounting to a maximum of 4,000 cfu ml(-1) of melt ice, in four different high arctic glaciers. twenty-two distinct species were isolated, including two new yeast species. basidiomycetes predominated, among which cryp ... | 2007 | 17072534 |
| cloning of an epoxide hydrolase-encoding gene from rhodotorula mucilaginosa and functional expression in yarrowia lipolytica. | epoxide hydrolases (ehs), especially those of fungal origin, have the ability to catalyse the enantioselective hydrolysis of epoxides to their corresponding diols. recombinant dna technology has been used extensively to overproduce these catalysts for the efficient hydrolytic kinetic resolution of epoxides, which serve as high-value intermediates in the fine chemicals and pharmaceutical industries. degenerate primers, based on data from available eh-encoding gene sequences, in conjunction with i ... | 2007 | 17173332 |
| synthesis, characterization and antimicrobial activity of fe(ii), zn(ii), cd(ii) and hg(ii) complexes with 2,6-bis(benzimidazol-2-yl) pyridine ligand. | 2,6-bis(benzimidazol-2-yl)pyridine (l) ligand and complexes [m(l)cl(2)] and [fe(l)(2)](clo(4))(2) (m=zn, cd, hg) have been synthesized. the geometries of the [m(l)cl(2)] complexes were derived from theoretical calculation in dgauss/dft level (dzvp basis set) on cache. the central m(ii) ion is penta-coordinated and surrounded by n(3)cl(2) environment, adopting a distorted trigonal bipyramidal geometry. the ligand is tridentate, via three nitrogen atoms to metal centre and two chloride ions lie on ... | 2007 | 17189664 |
| effect of mercury and organomercurials on cellular glucose utilization: a study using resting mercury-resistant yeast cells. | mercury compounds are highly toxic to all types of living cells. isolated yeast strains of rhodotorula rubra showed high and low resistance pattern towards mercury and organomercurial compounds. to investigate the basis of differential sensitivity of these two types of strains, glucose utilization was measured in the presence of mercury compounds. | 2007 | 17241342 |
| pseudomonas corrugata: plant pathogen and/or biological resource? | summary pseudomonas corrugata is the causal agent of tomato pith necrosis yet it is also used in the biological control of plant pathogenic bacteria and fungi. potentially it could be used in other fields, such as the production of commercial biomolecules with a wide range of application and including bioremediation. this review reports the multiple characteristics of the bacterium, highlights its known molecular features and speculates on the possible underlying mechanisms of action. taxonomy: ... | 2007 | 20507495 |
| salt stress and plasma-membrane fluidity in selected extremophilic yeasts and yeast-like fungi. | we have investigated changes in plasma-membrane fluidity in relation to nacl concentrations in yeasts and yeast-like fungi that were isolated from either subglacial ice or hypersaline waters. in both of these natural environments, these organisms are exposed to low water activity, due to either high nacl concentrations or low temperatures. our data indicate that the fluidity of the plasma membrane can be used as an indicator of fitness for survival in extreme environments. fungi that can survive ... | 2007 | 17298474 |
| inhibitory effects of na-hypochlorite and heating on the mycobiota associated with fruits or juice of passion (passiflora edulis sims) in uganda. | a total of 34 species belonging to 21 genera of fungi were recorded on passion fruits of both pure and hybrid origin in uganda, however, the pure type exhibited wider spectrum (28 species and 16 genera) than the hybrid type (21 & 15). also, yeasts (unidentified and rhodotorula mucilaginosa) were also encountered in high numbers. moreover, the mean count of all mycobiota obtained from the pure type was higher than that of hybrid, despite the bigger size of the later. members of yeasts and cladosp ... | 2006 | 24039477 |
| moulds and yeasts in fruit salads and fruit juices. | thirty-eight fruit salad samples including cantaloupe, citrus fruits, honeydew, pineapple, cut strawberries and mixed fruit salads, and 65 pasteurized fruit juice samples (apple, carrot, grapefruit, grape and orange juices, apple cider, and soy milk) were purchased from local supermarkets in the washington, dc area and tested for fungal contamination. the majority of fruit salad samples (97%) were contaminated with yeasts at levels ranging from <2.0 to 9.72 log10 of colony forming units per gram ... | 2006 | 16943069 |
| beta-carotene-rich carotenoid-protein preparation and exopolysaccharide production by rhodotorula rubra ged8 grown with a yogurt starter culture. | the underlying method for obtaining a beta-carotene-rich carotenoid-protein preparation and exopolysaccharides is the associated cultivation of the carotenoid-synthesizing lactose-negative yeast strain rhodotorula rubra ged8 with the yogurt starter culture (lactobacillus bulgaricus 2-11 + streptococcus thermophilus 15ha) in whey ultrafiltrate (45 g lactose/l) with a maximum carotenoid yield of 13.37 mg/l culture fluid on the 4.5th day. the chemical composition of the carotenoid-protein preparati ... | 2006 | 16989319 |
| mercury and organomercurial resistance in rhodotorula rubra: activation of glutathione reductase. | 2006 | 17033861 | |
| fungal contamination of bedding. | it is currently believed that most fungal exposure occurs external to the home. | 2006 | 16364170 |
| characterization of some yeasts isolated from foods by traditional and molecular tests. | in this study, 22 yeast strains isolated from foods were characterized by traditional and molecular techniques. with the help of traditional identification tests, yeast strains were grouped in 12 species belonging to 11 genera as follows: candida parapsilosis, rhodotorula mucilaginosa, debaryomyces hansenii, cryptococcus humicolus, cryptococcus albidus, aureobasidium spp., hanseniaspora valbyensis, metschnikowia pulcherrima, lachancea thermotolerans, pichia anomala, geotrichum candidum and yarro ... | 2006 | 16388865 |
| rhodotorula pacifica sp. nov., a novel yeast species from sediment collected on the deep-sea floor of the north-west pacific ocean. | a novel species of the genus rhodotorula was isolated from sediments collected on the deep-sea floor in the north-west pacific ocean. strains sy-96t, isolated from the yap trench, and sy-246, isolated from the iheya ridge, had almost identical nucleotide sequences for their internal transcribed spacers and their 5.8s rdna. their physiological characteristics were also almost identical. the strains were assumed to be related to rhodotorula mucilaginosa and rhodotorula dairenensis based on sequenc ... | 2006 | 16403901 |
| rhodotorula mucilaginosa outbreak in neonatal intensive care unit: microbiological features, clinical presentation, and analysis of related variables. | reported here are the features of a rhodotorula mucilaginosa outbreak that occurred in a neonatal intensive care unit. over a period of 19 days, clinical and laboratory signs of sepsis appeared in four premature infants carrying indwelling vascular catheters. after bloodstream infection with r. mucilaginosa was ascertained, the patients underwent amphotericin b therapy and recovered completely. in a retrospective case-control study, the variables displaying a statistical difference between case ... | 2006 | 16525775 |
| occurrence of yeasts in cloacae of migratory birds. | several species of yeast have been reported as pathogens in humans based on increases in immunodeficiency syndromes and as a result of immunosuppressant chemotherapy in cancer treatment. domestic and wild birds are known to act as carriers of human pathogenic fungi. to gain additional information on the yeasts present in the cloacae of some species of migratory birds, 421 wild birds (24.39% out of 1726 birds caught in romania, hungary and bulgaria) were sampled with the permission of the local j ... | 2006 | 16552486 |
| structure-activity relationship studies on uk-2a, a novel antifungal antibiotic from streptomyces sp. 517-02. part 5: roles of the 9-membered dilactone-ring moiety in respiratory inhibition. | several open-chained analogues of uk-2a, a novel antifungal antibiotic isolated from streptomyces sp. 517-02, were prepared for structure-activity studies. the in vitro antifungal activities of these compounds against rhodotorula mucilaginosa ifo 0001 and the inhibition of uncoupler-stimulated respiration in bovine heart submitochondrial particles (smp) were evaluated. oxidative potentials were measured by cyclic voltammetry. an analogue prepared from dihexyl l-glutamate showed comparable inhibi ... | 2006 | 16564168 |
| [screening of yeasts producing stable l-lactate cytochrome c oxidoreductase and regulation of enzyme synthesis]. | screening of strains producing a stable form of l-lactate cytochrome c oxidoreductase (flavocytochrome b2, fc b2) was carried out among 14 yeast species. enzyme activity was detected in polyacrylamide gel after the electrophoresis of cell-free extracts. the fc b2 of hansenula polymorpha, rhodotorula pilimanae, and kluyveromyces lactis are characterized by high thermostability; in particular, the fc b2 of h. polymorpha retains its activity and tetrameric structure even after heating at 60 degrees ... | 2006 | 16579440 |
| susceptibility of yeast isolates from cattle with otitis to aqueous solution of povidone iodine and to alcohol-ether solution. | lipid-dependent malassezia species, candida spp. and rhodotorula mucilaginosa have been associated with bovine parasitic otitis. this paper evaluated the susceptibility of 63 yeast isolates from cattle with otitis to a povidone iodine aqueous solution (1% and 0.5% v/v) and to an alcohol-ether solution (1:1 v/v). the effectiveness of these antiseptics was assessed using the european suspension test. products achieving equal to or greater than 5-log reduction in numbers of the challenge organism a ... | 2006 | 16772232 |
| are therapeutic ultrasound units a potential vector for nosocomial infection? | nosocomial infections present a widespread problem in today's healthcare environment, with a significant number of patients acquiring an infection annually. with the contemporary transition of immunocompromised and high-risk patients to community-based care, therapeutic ultrasound has the potential to be a vector of infection in the physiotherapy setting. the purpose of the present study was to determine the degree of contamination on therapeutic ultrasound transducer heads and ultrasound gel af ... | 2006 | 16808087 |
| a cold active (2r,3r)-(-)-di-o-benzoyl-tartrate hydrolyzing esterase from rhodotorula mucilaginosa. | in a screening procedure a pink-colored yeast was isolated from enrichment cultures with (2r,3r)-(-)-di-o-benzoyl-tartrate (benzoyl-tartrate) as the sole carbon source. the organism saar1 was identified by morphological, physiological, and 18s ribosomal dna/internal transcribed spacer analysis as rhodotorula mucilaginosa, a basidiomycetous yeast. during growth the yeast hydrolyzed the dibenzoyl ester stoichiometrically to the monoester using the separated benzoate as the growth substrate, before ... | 2006 | 16847603 |
| effects of different fungal elicitors on growth, total carotenoids and astaxanthin formation by xanthophyllomyces dendrorhous. | six fungal elicitors prepared from rhodotorula rubra, rhodotorula glutinis, panus conchatus, coriolus versicolor, mucor mucedo, mortieralla alpina m-23 were examined to determine their effects on the growth, total carotenoids and astaxanthin formation by xanthophyllomyces dendrorhous. the results showed that different fungal elicitor could cause diversely stimulating effects. among the fungal elicitors tested, the m. mucedo elicitor concentration of 30 mg l(-1) promoted the biomass and total car ... | 2006 | 16154499 |
| dna typing methods for differentiation of yeasts related to dry-cured meat products. | rflp analysis of the its and 18s rdna, rapd-pcr using mini- and microsatellite primers and rflp analysis of mitochondrial dna were examined to discriminate yeasts related to dry-cured meat products at species and strain level. seven species and 35 strains of yeasts usually found in dry-cured meat products were tested. rflp analysis of the its1-5.8s rdna-its2 and 18s rdna did not allow the separation at species level of all of the species tested. rapd with a m13 primer was found to be useful for ... | 2006 | 16257467 |
| biological treatment of wastewater discharged from biodiesel fuel production plant with alkali-catalyzed transesterification. | the biological treatment of wastewater discharged from a biodiesel fuel (bdf) production plant conducting alkali catalysis transesterification was investigated. bdf wastewater has a high ph and high hexane-extracted oil and low nitrogen concentrations, and inhibits the growth of microorganisms. the biological treatment of bdf wastewater is difficult because the composition of such wastewater is not suitable for microbial growth. to apply the microbiological treatment of bdf wastewater using an o ... | 2005 | 16310734 |
| occurrence and diversity of yeasts in the mid-atlantic ridge hydrothermal fields near the azores archipelago. | the yeast community associated with deep-sea hydrothermal systems of the mid-atlantic rift was surveyed for the first time. this study relied on a culture-based approach using two different growth media: a conventional culture medium for yeasts supplemented with sea salts (mypss) and the same medium additionally supplemented with sulfur (mypsss). for the evaluation of species diversity, a molecular approach involving minisatellite-primed polymerase chain reaction (msp-pcr) strain typing and sequ ... | 2005 | 16328655 |
| yeast community survey in the tagus estuary. | the yeast community in the waters of the tagus estuary, portugal, was followed for over a year in order to assess its dynamics. yeast occurrence and incidence were measured and this information was related to relevant environmental data. yeast occurrence did not seem to depend upon tides, but river discharge had a dramatic impact both on the density and diversity of the community. the occurrence of some yeasts was partially correlated with faecal pollution indicators. yeast isolates were charact ... | 2005 | 16329949 |
| efficiency of blood culture bottles for the fungal sterility testing of corneal organ culture media. | the consequences of fungal contamination of an organ cultured cornea, though exceptional, are often disastrous for the recipient. consequently, eye banks often quarantine corneas for 10 days or more before passing them for grafting. this period, though detrimental to the endothelial cell density of the delivered cornea, is necessary to detect contamination using conventional microbiological methods. the authors previously validated the use of a pair of aerobic and anaerobic blood bottles for sen ... | 2005 | 15834090 |
| evidence for viable but nonculturable yeasts in botrytis-affected wine. | in botrytis-affected wine, high concentrations of so2 are added to stop the alcoholic fermentation and to stabilize the wine. during maturing in barrels or bottle-ageing, an unwanted refermentation can sometimes occur. however, results of the usual plate count of wine samples at the beginning of maturing suggest wine microbial stability. the aim of this study was to investigate the mode of yeasts survival after the addition of so2 and to identify surviving yeasts. | 2005 | 15960668 |
| novel microbial epoxide hydrolases for biohydrolysis of glycidyl derivatives. | microbial isolates from biofilters and petroleum-polluted bioremediation sites were screened for the presence of enantioselective epoxide hydrolases active towards tert-butyl glycidyl ether, benzyl glycidyl ether, and allyl glycidyl ether. out of 270 isolated strains, which comprised bacteria, yeasts, and filamentous fungi, four were selected based on the enantioselectivities of their epoxide hydrolases determined in biotransformation reactions. the enzyme of aspergillus niger m200 preferentiall ... | 2005 | 16061300 |
| a vacuolar serine protease (rho m 2) is a major allergen of rhodotorula mucilaginosa and belongs to a class of highly conserved pan-fungal allergens. | rhodotorula mucilaginosa is one of the most frequently encountered species of yeasts in our environment. we reported here a major allergen of r. mucilaginosa. | 2005 | 16179794 |
| production of volatile organic compounds (vocs) by yeasts isolated from the ascocarps of black (tuber melanosporum vitt.) and white (tuber magnatum pico) truffles. | twenty-nine yeast strains were isolated from the ascocarps of black and white truffles (tuber melanosporum vitt. and tuber magnatum pico, respectively), and identified using a polyphasic approach. according to the conventional taxonomic methods, msp-pcr fingerprinting and sequencing of the d1/d2 domain of 26s rdna, the strains were identified as candida saitoana, debaryomyces hansenii, cryptococcus sp., rhodotorula mucilaginosa, and trichosporon moniliiforme. all isolates assimilated l: -methion ... | 2005 | 16187098 |
| copper tolerant yeasts isolated from polluted area of argentina. | eleven yeasts were isolated from wastewater sediment samples collected from a copper filter mine plant, located in the province of tucumán, argentina, and tested for their heavy metal tolerance. two isolates were selected based on their multiple tolerance to different heavy metals and their copper biosorption capacity was studied. analysis of the 26s rdna d1/d2 domain sequences indicates that isolate rcl-3 showed similarity with candida sp. and rcl-11 with rhodotorula mucilaginosa . growth perfo ... | 2005 | 16187261 |
| susceptibility profile of 29 clinical isolates of rhodotorula spp. and literature review. | in vitro susceptibility results of 29 clinical isolates of rhodotorula spp. were analysed. in addition, the susceptibility profile of another 102 rhodotorula isolates was reviewed. | 2005 | 15695538 |
| rhodotorula rubra keratitis and melting after repeated penetrating keratoplasty. | to describe a rare case of rhodotorula rubra keratitis in a corneal graft, and to discuss the management of this unusual pathogen. | 2005 | 15751254 |
| determination of the antimicrobial properties of oligo-2-hydroxy-1-naphthaldehyde. | oligo-2-hydroxy-1-naphthaldehyde (ohna) was synthesized by oxidative polycondensation using h2o2 (35%, aqueous solution), air o2 and naocl (34%, aqueous solution) by kaya and senol and the products were characterized by spectral techniques. antimicrobial activities of the first and second fractions of ohna were tested against corynobacterium xerosis ccm 2824, proteus vulgaris atcc 6897, staphylococcus epidermidis nrrl b-4877, s. aureus atcc 6538, enterobacter aerogenes atcc 13048, salmonella thy ... | 2005 | 16355978 |
| characterization of micro-organisms isolated from dairy industry after cleaning and fogging disinfection with alkyl amine and peracetic acid. | to characterize micro-organisms isolated from norwegian dairy production plants after cleaning and fogging disinfection with alkyl amine/peracetic acid and to indicate reasons for survival. | 2005 | 15610421 |
| prevalence of yeasts in the oral cavity of children treated with inhaled corticosteroids. | the aim of this study was to observe the prevalence of candida spp. in the oral cavity of children undergoing treatment with inhaled corticosteroids. thirty children treated with inhaled corticosteroids and thirty control children were studied. saliva samples were collected through oral rinses with phosphate buffered saline (pbs). the samples were plated on sabouraud's dextrose agar and incubated at 37 degrees c for 48 h. after this period, the number of colony-forming units per ml (cfu/ml) of s ... | 2004 | 15619871 |
| effect of foliar disease on the epiphytic yeast communities of creeping bentgrass and tall fescue. | the effect of mechanical wounding or foliar diseases caused by sclerotinia homoeocarpa or rhizoctonia solani on the epiphytic yeast communities on creeping bentgrass and tall fescue were determined by leaf washing and dilution plating. total yeast communities on healthy bentgrass and tall fescue leaves ranged from 7.9 x 103 to 1.4 x 105 cfu.cm-2 and from 2.4 x 103 to 1.6 x 104 cfu.cm-2, respectively. mechanically wounded leaves (1 of 2 trials) and leaves with disease lesions (11 of 12 trials) su ... | 2004 | 15644900 |
| biomass production of yeast isolate from salad oil manufacturing wastewater. | conversion of oil-rich salad oil manufacturing wastewater (somw) into protein source for animal feed through biomass production of yeast isolate was investigated in this study. five species of yeasts, including rhodotorula rubra, candida tropicalis, c. utilis, c. boidinii, trichosporon cutaneum, were isolated from somw following enrichment culture. of them, c. utilis was chosen as the sole biomass producer in the study due to its greatest oil uptake rate, 0.96 kg oil kg(-1) biomass d(-1), and hi ... | 2004 | 15683910 |
| unusual cause of peritonitis during peritoneal dialysis. rhodotorula rubra and amphotericin b. | 2004 | 15503179 | |
| growth inhibition dependent on reactive oxygen species generated by c9-uk-2a, a derivative of the antifungal antibiotic uk-2a, in saccharomyces cerevisiae. | uk-2a is a potent antifungal antibiotic and its structure is highly similar to that of antimycin a3 (aa). uk-2a and aa inhibit mitochondrial electron transport at complex iii. c9-uk-2a, which has been prepared to improve the duration of the antifungal activity of uk-2a, shows durable fungicidal activities against various species of fungi and induces both membrane injury and the generation of cellular reactive oxygen species (ros) against rhodotorula mucilaginosa ifo 0001 cells. we found that c9- ... | 2004 | 15515888 |
| direct chemical synthesis of the beta-mannans: linear and block syntheses of the alternating beta-(1-->3)-beta-(1-->4)-mannan common to rhodotorula glutinis, rhodotorula mucilaginosa, and leptospira biflexa. | two stereocontrolled syntheses of a methyl glycoside of an alternating beta-(1-->4)-beta-(1-->3)-mannohexaose, representative of the mannan from rhodotorula glutinis, rhodotorula mucilaginosa, and leptospira biflexa, are described. both syntheses employ a combination of 4,6-o-benzylidene- and 4,6-o-p-methoxybenzylidene acetal-protected donors to achieve stereocontrolled formation of the beta-mannoside linkage. the first synthesis is a linear one and proceeds with a high degree of stereocontrol t ... | 2004 | 15548005 |
| application of temperature gradient gel electrophoresis to the study of yeast diversity in the estuary of the tagus river, portugal. | temperature gradient gel electrophoresis (tgge) was employed for the assessment of yeast diversity in the estuary of the tagus river (portugal). the molecular detection of yeasts was carried out directly from water samples and, in parallel, a cultivation approach by means of an enrichment step was employed. a nested pcr was employed to obtain a fungal amplicon containing the d2 domain of the 26s rrna gene. for identification the tgge bands were extracted, re-amplified, and sequenced. fourteen fu ... | 2004 | 15556087 |
| polyphasic identification of yeasts isolated from bark of cork oak during the manufacturing process of cork stoppers. | a two-step protocol was used for the identification of 52 yeasts isolated from bark of cork oak at initial stages of the manufacturing process of cork stoppers. the first step in the identification was the separation of the isolates into groups by their physiological properties and rflps of the its-5.8s rrna gene. the second step was the sequencing of the d1/d2 domains of the 26s rrna gene of selected isolates representing the different groups. the results revealed a predominance of basidiomycet ... | 2004 | 15093778 |
| rhodotorula mucilaginosa, a carotenoid producing yeast strain from a patagonian high-altitude lake. | the red yeast rhodotorula mucilaginosa strain crub 0138 (previously identified as r. lactosa) was isolated from a high-altitude patagonian lake toncek (1700 m a.s.l.), and assigned with mucilaginosa species. its biochemical, physiological and molecular features were assessed and compared to r. mucilaginosa pycc 5166 type strain using a polyphasic approach; in addition, biomass and carotenoid pigment production at different c/n ratios were determined in an incubator shaker. phenetic characterizat ... | 2004 | 15143736 |
| [search of heavy metals biosorbents among yeasts of different taxonomic groups]. | the use of microbial cells as heavy metal biosorbents is a potential alternative for the existing methods of the environment treatment for pollution by these metals. yeast may be successfully used in the metals sorption. an agar-plate screening method was used for rapid isolation of metal-accumulating strains of yeast and preliminary estimation of their biosorption capacity. the capacity to accumulate heavy metals, such as copper, zinc, lead, chrome and cobalt was estimated in 68 pigmented and p ... | 2004 | 15208860 |
| exopolysaccharides produced by mixed culture of yeast rhodotorula rubra ged10 and yogurt bacteria (streptococcus thermophilus 13a + lactobacillus bulgaricus 2-11). | the studies of the production of exopolysaccharides by lactose-negative yeast and a yogurt starter co-cultivated in a natural substrate containing lactose may be considered of interest because they reveal the possibilities for high-efficiency synthesis of biopolymers by mixed cultivation. | 2004 | 15281931 |
| improvement by soil yeasts of arbuscular mycorrhizal symbiosis of soybean (glycine max) colonized by glomus mosseae. | the effects of the soil yeasts rhodotorula mucilaginosa, cryptococcus laurentii and saccharomyces kunashirensis on the arbuscular mycorrhizal (am) fungus glomus mosseae (beg 12) was studied in vitro and in greenhouse trials. the presence of yeasts or their soluble and volatile exudates stimulated the percentage spore germination and hyphal growth of g. mosseae. percentage root length colonized by g. mosseae and plant dry matter of soybean (glycine maxl. merill) were increased only when the soil ... | 2004 | 14685832 |
| oral candida flora from brazilian human immunodeficiency virus-infected patients in the highly active antiretroviral therapy era. | one of the main opportunistic fungal infections amongst immunocompromised individuals is oral candidosis, which has been found in up to 90% of human immunodeficiency virus (hiv)-infected patients. this study employed yeasts isolated from the saliva and oral cavities of 114 hiv-infected patients living in campinas, são paulo. of the isolates, 57.8% were identified as candida albicans and 42.1% as non-c. albicans. the latter isolates were subsequently identified as c. krusei (7.5%), c. lusitaniae ... | 2004 | 15322634 |
| efficacy of antiseptics and disinfectants on clinical and environmental yeast isolates in planktonic and biofilm conditions. | the aim of this study was to evaluate the efficacy of five antiseptics, three surface disinfectants and uv radiation against a wide range of clinical and environmental yeast isolates. their efficacy against pure cultures, yeast mixtures and biofilms (prepared by culturing yeasts in sabouraud broth containing a final concentration of 8% glucose) was tested. three clinical isolates of candida albicans, cryptococcus neoformans and rhodotorula rubra, and two environmental isolates of candida albican ... | 2004 | 15358824 |
| synthesis of carotenoids by rhodotorula rubra ged8 co-cultured with yogurt starter cultures in whey ultrafiltrate. | two cultures, a yeast ( rhodorula rubra ged8) and a yogurt starter ( lactobacillus bulgaricus 2-11+ streptococcus thermophilus 15ha), were selected for associated growth in whey ultrafiltrate (wu) and active synthesis of carotenoids. in associated cultivation with the yogurt culture l bulgaricus 2-11+s. thermophilus 15ha under intensive aeration (1.3 l(-1)min(-1) air-flow rate) in wu (45 g lactose l(-1)), initial ph 5.5, 30 degrees c, the lactose-negative strain r. rubra ged8 synthesized large a ... | 2004 | 14997360 |
| use of whey ultrafiltrate as a substrate for production of carotenoids by the yeast rhodotorula rubra. | carotenogenesis of the lactose-negative yeast rhodotorula rubra ged5 was studied by cocultivation with kluyveromyces lactis mp11 in whey ultrafiltrate (wu) (35, 50, and 70 g of lactose/l). maximum yields of cell mass (24.3 g/l) and carotenoids (10.2 mg/l of culture fluid or 0.421 micro g/g of dry cells) were obtained by growing the microbial association in wu (50 g of lactose/l) in a fermentor with an airflow rate of 0.8 l/(l.min), agitation of 220 rpm, and temperature of 30 degrees c. the ident ... | 2004 | 15007181 |
| improvement of carotenoid-synthesizing yeast rhodotorula rubra by chemical mutagenesis. | a mutant rhodotorula rubra with enhanced carotenoid-synthesizing activity for synthesizing total carotenoids and beta-carotene was obtained by n-methyl-n'-nitro-n-nitrosoguanidine mutagenesis. when co-cultivated with yogurt starter bacteria (lactobacillus bulgaricus + streptococcus thermophilus) in whey ultrafiltrate it produced 15.7 mg total carotenoids l(-1) culture fluid or 946 microg total carotenoids g(-1) dry cells of which 71% was beta-carotene. grown as a monoculture in glucose substrate ... | 2004 | 15018061 |
| alterations in protein synthesis and levels of heat shock 70 proteins in response to salt stress of the halotolerant yeast rhodotorula mucilaginosa. | responses of the halotolerant yeast rhodotorula mucilaginosa yrh2 to salt stress was studied. strain yrh2 was isolated from chemical industry park wastewater evaporation ponds that are characterized by large fluctuations in salinity and ph. upon shift to high salt medium there is a shutdown of protein synthesis. radiolabeling and separation of proteins from salt stressed and non-stressed cells identified down-regulated heat shock 70 proteins ssb1/2p, by n-terminal sequencing and western blotting ... | 2004 | 15031641 |
| [groups and sources of yeasts in house dust]. | house dust contains bacteria, mycelial fungi, microarthropods, and yeasts. the house dust samples collected in 25 apartments in moscow and the moscow region were found to contain yeasts belonging to the genera candida, cryptococcus, debaryomyces, rhodotorula, sporobolomyces, and trichosporon. the most frequently encountered microorganisms were typical epiphytic yeasts, such as cryptococcus diffluens and rhodotorula mucilaginosa, which are capable of long-term preservation in an inactive state. t ... | 2004 | 15074050 |
| [multifocal mycoses in women: prevalence, species characteristics, and some intraspecific features]. | the aim of this study was to detect fungi in three ontocenoses of 947 women (aged 20-45). the prevalence of multifocal fungal infections in women varied from 62.2 +/- 2.99% to 81.0 +/- 3.92% in different ontocenoses. they assumed the following mean values: 38.4 +/- 1.77% for the vagina, 42.2 +/- 1.80% for the oral cavity, and 25.0 +/- 1.58% for the anus. the clinical manifestations of sexual organs inflammations were statistically significantly (p < 0.01) more frequent in women infected with fun ... | 2004 | 16865940 |
| the yeast flora of some decaying mushrooms on trunks of living trees. | several ascomycetous and basidiomycetous yeasts were isolated from rotten mushrooms on the trunks of beech and tamarisk trees. one strain, identified as the novel species cryptococcus allantoinivorans, assimilated allantoin as the sole carbon source. phylogenetically it belongs to the c. laurentii complex, papiliotrema bandonii being the closest relative. some ascomycetous strains could not be distinguished from pichia guillermondii, but deviated considerably in rdna sequences. in addition to th ... | 2004 | 15702547 |
| finding optimal photosensitisers for the decontamination of foods by the photodynamic effect. | a new method for sanitation based on the photodynamic effect is introduced. photosensitisers are compounds that generate cytotoxic oxygen species and free radicals after excitation with appropriate visible light. the cell killing efficacy is due to their chemical structure, to the actual environment and therefore also to their degree of aggregation. as has been shown, photosensitisers bound to the cell wall or incorporated into the cells are very effective cytotoxic agents after illumination. ev ... | 2003 | 15806940 |
| na+-mediated piezoprotection in rhodotorula rubra. | sodium concentrations as low as 2 mm exerted a significant protective effect on the high-pressure inactivation (160-210 mpa) of rhodotorula rubra at ph 6.5, but not on two other yeasts tested (schizosaccharomyces pombe and saccharomyces cerevisiae). a piezoprotective effect of similar magnitude was observed with li+ (2 and 10 mm), and at elevated ph (8.0-9.0), but no effect was seen with k+, ca2+, mg2+, mn2+, or nh4(+). intracellular na+ levels in cells exposed to low concentrations of na+ or to ... | 2003 | 14520537 |
| [the absence of direct relationship between the ability of yeasts to grow at elevated temperatures and their survival after lethal heat shock]. | the study of the growth of the yeasts rhodotorula rubra, saccharomyces cerevisiae, and debaryomyces vanriji at elevated temperatures and their survival after transient lethal heat shock showed that the ability of these yeasts to grow at supraoptimal temperatures (i.e., their thermoresistance) and their ability to tolerate lethal heat shocks (i.e., their thermotolerance) are determined by different mechanisms. the thermotolerance of the yeasts is suggested to be mainly determined by the division ... | 2003 | 14526536 |
| rhodotorulic acid production by rhodotorula mucilaginosa. | rhodotorula mucilaginosa produces the siderophore rhodotorulic acid (ra) when grown in iron-limited conditions. r. mucilaginosa grew at rates between 0.10 and 0.19 h(-1) in iron-restricted conditions, depending on the carbon source, and at 0.23 h(-1) in iron-sufficient conditions. in bioreactors inoculated with iron-starved pre-cultures, initial specific growth rates in batch culture were dependent on the iron concentration. the critical dilution rate (dcrit, at which steady state cultures canno ... | 2003 | 14531617 |
| molecular characterization of carotenogenic yeasts from aquatic environments in patagonia, argentina. | fifteen aquatic environments (lakes, lagoons and rivers) of glacial origin in the northern andean patagonia (argentina) were surveyed for the occurrence of red yeasts. subsurface water samples were filtered and used for colony counting and yeast isolation. a preliminary quantitative analysis indicated that total yeast counts ranged between 0 and 250 cells l(-1). a polyphasic approach including physiological and molecular methods was used for the identification of 64 carotenogenic yeast strains. ... | 2003 | 14574108 |
| recurrent catheter-related rhodotorula rubra infection. | a 34-year-old male receiving chronic parenteral nutrition for treatment of short bowel syndrome and intermittent immunosuppressive agents for juvenile rheumatoid arthritis developed recurrent, catheter-associated rhodotorula rubra fungemia over a one-year period. infection with this yeast is associated with insertion of central venous catheters. recurrence of r. rubra infection is an unusual event that presumably occurred because of chronic skin colonization by the organism. | 2003 | 14616717 |