5B
Which of the following statements regarding medically important fungi is NOT true?
All reproduce sexually
Which of the following is an opportunist, a potent allergen, a mold in vivo and, in nature, causes serious illness in neutropenic patients?
Aspergillus
A very common oral antifungal agent directed towards dermatophytes is:
Griseofulvin
Which of the following reagents is used to dissolve host tissue in skin scrapings in order to search for fungal elements?
KOH
Which type of hypersensitivity is usually associated with Aspergillus spores?
Type I
Fungi are primarily identified in the clinical laboratory by which of the following?
Visual characteristics
Polyenes are agents that preferentially:
Bind to ergasterol
Which one of the following systemic mycosis agents is endemic in the soil of the arid regions of the southwestern U S?
Coccidiodes immitis
Specialized fungal structures for asexual reproduction, easily airborne and disseminated are:
Conidia
All of the following are dimorphic EXCEPT
Cryptococcus
Which of the following agents is used to stain cerebrospinal fluid while searching for yeast?
India ink
A woman is brought to the hospital after experiencing hallucinations. A careful history reveals that she lives on a communal farm and eats primarily whole grains and naturally grown and homemade canned foods. What is the most likely scenario for her symptoms resulting from ergot alkaloids and lysergic acid diethylamide?
Ingestion ofClaviceps purpura while preparing bread using moldy grain
What is the mechanism by which azoles act on fungal infections?
Inhibiting the synthesis of ergosterol
Which of the following is a ubiquitous fungus rarely causing pneumonia except in AIDS patients?
Pneumocystis
An example of a subcutaneous mycosis is
Sporotrichosis
Tinea versicolor is an example of a:
Superficial mycosis
In the clinical laboratory, DNA probes are mostly used to identify:
Systemic mycoses
Which of the following statements is NOT true regarding superficial mycoses?
They produce slight pain and discomfort
Each of the following statements concerning fungi is correct EXCEPT:
Transmission is usually via the fecal/oral route
