Zygomycetes
Mostrando 25-36 de 44 artigos, teses e dissertações.
-
25. Gastric mucormycosis due to Rhizopus oryzae in a renal transplant recipient.
Gastric mucormycosis is a rare disease with a reported fatal outcome of 98%. Manifestations range from colonization of peptic ulcers to infiltrative disease with vascular invasion and dissemination. In our renal transplant patient a deep gastric ulceration infected with Rhizopus oryzae (class Zygomycetes), which is known to be an agent of mucormycosis, was d
-
26. Experimental Cerebral Zygomycosis in Alloxan-Diabetic Rabbits I. Relationship of Temperature Tolerance of Selected Zygomycetes to Pathogenicity
Acute alloxan diabetic rabbits were used in a survey of the potential ability of Absidia, Cunninghamella, Mucor, Rhizopus, Syncephalastrum, and Thamnidium species to cause cerebral zygomycosis (phycomycosis, mucormycosis). Specifically, the correlation of thermotolerance with potential pathogenicity was studied. The test organisms fell into two groups: those
-
27. Zygomycetes in Human Disease
The Zygomycetes represent relatively uncommon isolates in the clinical laboratory, reflecting either environmental contaminants or, less commonly, a clinical disease called zygomycosis. There are two orders of Zygomycetes containing organisms that cause human disease, the Mucorales and the Entomophthorales. The majority of human illness is caused by the Muco
American Society for Microbiology.
-
28. Dyes as fungal inhibitors: effect on colony diameter.
The effects of a wide range of concentrations of 13 dyes on the colony diameters of nine fungal strains (including members of the Deuteromycetes and Zygomycetes) were evaluated. Auramine at a concentration of 50 ppm (50 micrograms/ml), methylene blue at a concentration of 500 ppm, gentian violet at a concentration of 5 ppm, and phenol red at a concentration
-
29. The MTT [3-(4,5-Dimethylthiazol-2-yl)-2,5-Diphenyltetrazolium Bromide] Assay Is a Fast and Reliable Method for Colorimetric Determination of Fungal Cell Densities
The entomopathogenic fungus Neozygites parvispora (Entomophthorales: Zygomycetes) grows in vitro as irregularly rod-shaped hyphal bodies in a complex medium. In order to simplify the medium composition and determine growth-promoting compounds for the cultivation of this fungus, we were looking for a rapid and quantitative method to estimate the number of liv
American Society for Microbiology.
-
30. Organization of the Tryptophan Pathway: a Phylogenetic Study of the Fungi
The enzymes involved in tryptophan biosynthesis have been analyzed in a variety of fungal strains and a few other microorganisms. The same five biosynthetic reactions occur in all organisms tested, but differences have been found in the stability requirements for the enzymes, in their differential precipitation with ammonium sulfate, and in their sedimentati
-
31. Pulmonary infiltrates in immunocompromised patients: diagnosis by cytological examination of bronchoalveolar lavage fluid.
Thirty pulmonary infiltrates in 26 patients were investigated by bronchoalveolar lavage. Sixteen of the patients were on therapeutic immunosuppression for renal disease or transplant and 10 had leukaemia, lymphoma, or allied conditions. A rapid specific diagnosis was made in 21 (70%) episodes by cytological examination of the fluid and in 28 (93%) by a combi
-
32. Scanning Electron and Light Microscopic Study of Microbial Succession on Bethlehem St. Nectaire Cheese
St. Nectaire cheese is a semisoft cheese of French origin that, along with Brie and Camembert cheeses, belongs to the class of surface mold-ripened cheese. The surface microorganisms that develop on the cheese rind during ripening impart a distinctive aroma and flavor to this class of cheese. We have documented the sequential appearance of microorganisms on
-
33. Protoplasmic Organization of Hyphal Tips Among Fungi: Vesicles and Spitzenkörper
Hyphal tips of fungi representing Oömycetes, Zygomycetes, Ascomycetes, Basidiomycetes, and Deuteromycetes were examined by light and electron microscopy and compared with respect to their protoplasmic organization. In all fungi studied, there is a zone at the hyphal apex which is rich in cytoplasmic vesicles but nearly devoid of other cell components. Some
-
34. Blakeslea trispora Genes for Carotene Biosynthesis
We cloned the carB and carRA genes involved in β-carotene biosynthesis from overproducing and wild-type strains of Blakeslea trispora. The carB gene has a length of 1,955 bp, including two introns of 141 and 68 bp, and encodes a protein of 66.4 kDa with phytoene dehydrogenase activity. The carRA gene contains 1,894 bp, with a single intron of 70 bp, and enc
American Society for Microbiology.
-
35. Rapid Identification of Pathogenic Fungi Directly from Cultures by Using Multiplex PCR
A multiplex PCR method was developed to identify simultaneously multiple fungal pathogens in a single reaction. Five sets of species-specific primers were designed from the internal transcribed spacer (ITS) regions, ITS1 and ITS2, of the rRNA gene to identify Candida albicans, Candida glabrata, Candida parapsilosis, Candida tropicalis, and Aspergillus fumiga
American Society for Microbiology.
-
36. Development and Evaluation of an Immunodiffusion Test for Diagnosis of Systemic Zygomycosis (Mucormycosis): Preliminary Report
An antigen analysis with filtrate and homogenate precipitinogens of single isolates of the zygomycetes Absidia corymbifera, Mucor pusillus, Rhizopus arrhizus, and Rhizopus oryzae demonstrated the presence of common antigens among the three genera as well as antigens which permit their differentiation. Selected homogenate antigens were valuable in developing