Exam 59: Hyaline Molds, Mucorales Zygomycetes, Dermatophytes, and Opportunitistic and Systemic Mycoses

Which organism produces mostly shades of green or blue-green colonies? Microscopically, hyphae are hyaline and septate and produce brushlike conidiophores.

MATCHING Match the morphologic features with the dimorphic fungus. -Budding yeast resembling a "mariner's wheel"

Trichophyton schoenleinii causes a condition that is characterized by the formation of yellowish cup-shaped crusts or scutulae, considerable scarring of the scalp, and sometimes permanent alopecia.This organism is usually recovered in _____ days.

MATCHING Match the morphologic features with the dimorphic fungus. -Cigar-shaped yeast cells

MATCHING Match the morphologic features with the dimorphic fungus. -Nonbudding, thick-walled spherule

MATCHING Match the morphologic features with the dimorphic fungus. -Yeastlike cells with internal cross walls

Which of the following Trichophyton spp.grows slowly (14 to 30 days)and best at 35° to 37° C? In addition, enriched media with thiamine and inositol enhance its growth.

MATCHING Match the morphologic features with the dimorphic fungus. -Single bud connected to the parent cell by broad base

The term used to describe ringworm of the nail is:

Which genus is involved in infections of the skin and nails only?

Which two assays should be used together for detecting antibodies toward Blastomyces dermatitidis, Histoplasma capsulatum, and Coccidioides immitis?

MATCHING Match the morphologic features with the dimorphic fungus. -Small, round-to-oval yeast cells; 2 to 5 microns in diameter

An organism was isolated after growing 26 days.Colonial morphologic appearance revealed heaped, wrinkled, moist, and yeastlike colonies.As the culture aged, colonies became covered with short aerial mycelium that turned from tan to brown.This organism is most likely:

Unbranched sporangiophores with rhizoids that appear opposite the point where the stolon arises at the base of the sporangiophore best describes which zygomycetes?

The slow-growing organism Trichophyton rubrum produces a flat or heaped-up colony, generally white to reddish with a cottony or velvety surface.The cherry-red color is best observed on the reverse side of the colony.This organism is capable of infecting which of the following?

Which rapidly growing Aspergillus spp.(2 to 6 days)best describes a mold that produces a fluffy-to-granular, white-to-blue green colony?

A fungus is recovered from a nail scrapping.Microscopic examination reveals numerous smooth, thin-walled, club-shaped, multiseptate macroconidia; however, microconidia are absent.The organism can be identified as:

A pulmonary fungus ball and external otomycosis and onychomycosis are all infections caused by which genera?

A hair perforation test is performed using Trichophyton mentagrophytes and T.rubrum.The expected results are:

Which dermatophyte usually fluoresces yellow-green under a Wood's lamp?