What type of yeast is described by a single broad-based budding in histology?

The type of yeast characterized by a single broad-based budding seen in histology is Cryptococcus. This yeast is known for its unique morphology, which includes a thick capsule and a single round body that buds off the parent cell in a manner distinct from other yeasts.

In histological preparations, Cryptococcus often appears as large yeast cells with a prominent capsule, and the broad-based budding can be observed clearly under the microscope. This feature is significant as it helps in differentiating Cryptococcus from other fungal species.

Other fungi listed in the options have different morphological characteristics. For example, Candida typically exhibits pseudohyphae and yeast forms that can show more complicated budding patterns. Blastomyces often presents with a yeast form that is more round and may not exhibit broad-based budding, while Aspergillus is a mold that produces conidia and does not reproduce by budding in the same way as yeasts do.

Understanding the specific morphological features of these fungi is crucial for accurate identification in clinical laboratory settings, making the unique budding characteristics of Cryptococcus significant in diagnosing infections caused by this organism.