Subcutaneous Mycoses by Dr. Razaq Momoh Quiz

Sporotrichosis

• The causative agent of sporotrichosis is Sporothrix schenckii.
• At 35-37°C, Sporothrix schenckii appears as yeast-like cells in tissues or in vitro.
• Sporothrix schenckii grows as a mold at room temperature (25-30°C).
• Sporotrichosis is a subcutaneous fungal infection.
• Young colonies of Sporothrix schenckii at room temperature have a characteristic appearance of brown or black, moist, and mucoid.
• The most common manifestation of sporotrichosis is lymphocutaneous lesions.
• The antigenic structure used for eliciting a positive delayed skin test in infected humans or animals is sporotrichin.
• In tissue, the fungus is seen as rounded or oval yeast-like cells.
• Mycetoma is characterized by a chronic infection with a draining sinus.
• The drug of choice for extracutaneous sporotrichosis is amphotericin B.

Candidiasis

• The causative agent of candidiasis is Candida albicans.
• Candida albicans has a characteristic morphology of oval, budding yeast cells.
• Candida albicans is identified by its ability to form germ tubes and chlamydospores.
• Disruption of the mucosal barrier usually precedes invasive candidiasis.
• Non-albican vagina species usually enter the blood through the use of central venous catheters.
• Candida albicans forms germ tubes at 37°C.