A student working for the summer at a plant nursery has a nodular lesion on his forearm that develops a draining tract. The following organism is isolated from the culture at 22° C. Identify the organism from the following:
A) Trichosporon boydii
B) Sporothrix schenckii
C) Trichophyton rubrum
D) Microsporum canis

Question

A student working for the summer at a plant nursery has a nodular lesion on his forearm that develops a draining tract. The following organism is isolated from the culture at 22° C. Identify the organism from the following: 
A) Trichosporon boydii 
B) Sporothrix schenckii 
C) Trichophyton rubrum 
D) Microsporum canis

Quizplus · Accepted Answer

The presence of a nodular lesion with a draining tract is characteristic of a fungal infection known as sporotrichosis. The organism commonly responsible for this infection is Sporothrix schenckii, which grows best at 22° C. Trichosporon boydii is a yeast-like fungus responsible for opportunistic infections in immunocompromised individuals. Trichophyton rubrum and Microsporum canis are both dermatophytes that commonly cause skin infections such as athlete's foot and ringworm, but neither grow best at 22° C or cause the specific symptoms mentioned in the scenario.

A Student Working for the Summer at a Plant Nursery