Pigmentation Information and Courses from MediaLab, Inc.
These are the MediaLab courses that cover Pigmentation and links to relevant pages within the course.
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| Rhodotorula is a yeast that may be found in: | View Page |
| The colonies shown in the blood agar (upper) and MacConkey agar (lower) biplate are a 24 hour growth from an aerobic blood culture bottle that became positive at 12 hours after inoculation. The appearance of the colonies on MacConkey agar rules out the following two bacterial species: | View Page |
| Staph on BA The photomicrograph of the surface of a 5% sheep blood agar illustrates the colonies that grew out of the foot drainage after 24 hours at 35C. They are entire, convex, smooth, and have a slight yellow pigmentation. Hemolysis is not observed. A gram stain was prepared from one of the isolated colonies. | View Page |
| Match each hyaline mold from the drop-down list to its corresponding colony and microscopic description. The mold colonies are illustrated in the image on the right. | View Page |
| The dimorphic fungus that may produce black, yeast-like colonies after prolonged incubation at 37°C is: | View Page |
| The growth of the colonies shown in the upper image was obtained on blood agar from a sputum specimen after 8 days of incubation at 30°C. The lower image is a photomicrograph of a lactophenol blue mount made from a portion of the colony. The diagnosis is: | View Page |
| This image illustrates a lactophenol blue mount of a mold recovered after 7 days incubation of brain heart infusion broth. The large macroconidia suggests the mold form of Histoplasma capsulatum. However, there is the possibility that this mold represents its saprophytic counterpart, which is: | View Page |
| This image illustrates a lactophenol blue mount prepared from a mold recovered after 7 days incubation on brain heart infusion broth. The individual microconidia, each borne by a delicate conidiophore, suggests the mold form of Blastomyces dermatitidis. However, there is the possibility that this mold represents its saprophytic counterpart, which is called: | 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 |
| 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 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 |