Cryptococcus Information and Courses from MediaLab, Inc.
These are the MediaLab courses that cover Cryptococcus and links to relevant pages within the course.
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| An India Ink preparation in used to identify: | View Page |
| The colonies growing on the surface of this brain-heart infusion with blood agar plate were "converted" from a mold colony suspected of being Histoplasma capsulatum by incubating a subculture at 37°C for 5 days. The yeast forms that must be identified in mounts made from one of these colonies to confirm the identification are: | View Page |
| Match the names of each of the yeast species with its most likely colony morphology as seen in the images on the right. | View Page |
| Match the name of each of the species of yeast listed with its corresponding microscopic appearance as illustrated in the images on the right. | View Page |
| Match the names of each of the species of yeast listed with its associated phenotypic property that is helpful in establishing a species identification. | View Page |
| Match the name of each species of yeast listed below with the location listed in the drop-down box where that species may be concentrated. | View Page |
| Arrange in sequence the steps that should be taken to make a definitive identification of Cryptococcus neoformans. | View Page |
| Match each of the fungal species listed below with the appropriate category, indicating whether or not it has the capability of producing pseudohyphae on cornmeal agar. | View Page |
| The colonies shown in this photograph were grown on Guizotia abyssinica (bird seed) agar at 30°C for 72 hours. The most likely identification is: | View Page |
| The forms seen in this photomicrograph, produced from a light inoculum of an unknown yeast colony incubated in rabbit plasma at 35°C for 2 hours, leads to the presumptive identification of: | View Page |
| Shown in this photomicrograph is a Gomori methenamine silver stain of a lung biopsy obtained from a patient with X-ray evidence of multi-focal pneumonitis. The yeast most likely to be recovered in culture of this tissue is: | View Page |
| The colony shown in the upper image was recovered from peritoneal fluid of a patient receiving continuous peritoneal dialysis. The lower image is a photomicrograph prepared from a small portion of the colony illustrating the microscopic morphology. Each of the following species of yeast can be eliminated except: | View Page |
| Although only a few human cases have been reported, brewers and bakers may in particular be at increased risk for developing infections with: | View Page |
| Illustrated in this photomicrograph of a lactophenol blue preparation of a urine sediment is a cluster of yeast cells that were presumptively identified as Cryptococcus species. Further characteristics that may assist in confirming this identification are: | View Page |
| This photomicrograph is a representative field of a Wright-Giemsa-stained bone marrow aspirate in which a pair of budding yeast cells is seen centrally (arrows). Based on the appearance of these yeast cells, what other test would you expect to be positive? | View Page |
| Each of the following is considered to be a virulence factor in Cryptococcus neoformans except: | View Page |