超星 - 真菌致病性--章节练习

单选题

C.albicans is recognized in microscopic examination of infected tissues by the presence of

A. Spherules containing endospores
B. Metachromatic granules
C. Yeasts and pseudohyphae
D. Asci containing 2–8 ascospores

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单选题

The commonly used differential staining method for Cryptococcus neoformans is

A. Gram stain
B. acid-fast dying
C. auramine staining
D. ink dying

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单选题

The main inspection method for identifying multicellular fungi is

A. Microscopic examination after Gram staining
B. Microscopic examination after negative staining of ink
C. Serological examination
D. Small culture to check mycelium and spores

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单选题

Not the main cause of Candida infection

A. Contact with Candida patients
B. Dysbacteriosis
C. Long-term use of hormones or immunosuppressants
Dysfunction of endocrine function

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单选题

Candida albicans often causes

A. Ringworm
B. Infection of subcutaneous tissue
C. Infection of skin mucous membrane and internal organs
D. Toxemia

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单选题

Which statement regarding fungal cell walls is correct?

A. The major components of fungal cell walls are proteinssuch as chitin, glucans, and mannans
B. The cell wall is not essential for fungal viability or survival
C. Ligands associated with the cell walls of certain fungimediate attachment to host cells
D. Fungal cell wall components are the targets for the major classes of antifungal antibiotics, such as the polyenes and azoles
E. Fungal cell wall components rarely stimulate an immune

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单选题

The mechanism of mucosal invasion by C. albicans is at least partially understood. Which one of the following modifications in the structure or function of this yeast would be most likely to affect its invasive ability?

A. Loss of ability to produce ethanol from glucose
B. Loss of ability to produce germ tubes or hyphae
C. Reduced ability to grow at 37°C
D. Loss of ability to produce a polysaccharide capsule
E. Replacement of mannans in the cell wall with glucan

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