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WorksheetsFungi TBL
Total questions: 15
Worksheet time: 8mins
Name
Class
Date
1.
All of the following are medically dimorphic fungi except:
a)
Histoplasma capsulatum
b)
Blastomyces dermatitidis
c)
Coccidioides immitis
d)
Aspergillus niger
2.
Cutaneous mycoses are fungal infections that involve:
a)
Hair
b)
Skin
c)
Nails
d)
Hair, Skin & Nails
3.
Which fungus is most often acquired by traumatic implantation into the skin?
a)
Histoplasma capsulatum
b)
Sporothrix schenckii
c)
Coccidioides immitis
d)
Penicillium marneffei
4.
Which stain uses a bleaching agent for fungal detection?
a)
Gram stain
b)
Lactophenol cotton blue
c)
Calcofluor white
d)
India ink
5.
Which criterion applies to the identification of Histoplasma capsulatum?
a)
Red pigment on cornmeal agar
b)
Produces yeast form at 25°C and mold form at 36°C
c)
Slow-growing fungus (1 to 4 weeks)
d)
All
6.
What are the optimal temperature and incubation time before a fungal blood culture is reported as negative?
a)
37°C; 21 days
b)
37°C; 7 days
c)
30°C; 21 days
d)
30°C; 7 days
7.
What is a disadvantage of using the tease mount?
a)
The preparation cannot be preserved.
b)
Lactophenol cotton blue stains uniformly.
c)
Conidia may be disrupted in the preparation.
d)
Contamination is possible.
8.
Which of the following organisms is/are partially or completely inhibited by media containing cycloheximide?
a)
Cryptococcus spp.
b)
Candida krusei
c)
Aspergillus niger
d)
All
9.
Which test can be used to differentiate T. mentagrophytes from T. rubrum?
a)
Fluorescence using a Wood’s lamp
b)
In vitro hair perforation
c)
Red color on reverse side of colony
d)
Pyriform microconidia
10.
Tinea capitis is caused by which dermatophyte?
a)
T. tonsurans
b)
M. audouinii
c)
M. canis
d)
All
11.
Which of the following produces rhizoids?
a)
Mucor spp.
b)
Rhizopus spp.
c)
Trichophyton spp.
d)
Microsporum spp.
12.
Which dimorphic fungus may be contracted by people who clean chicken coops?
a)
Blastomyces dermatitidis
b)
Histoplasma capsulatum
c)
Coccidioides immitis
d)
Paracoccidioides brasiliensis
13.
Microsporum infection involves:
a)
Hair, skin, and nails
b)
Hair and skin
c)
Skin and nails
d)
None
14.
A Wood’s lamp is used to detect fluorescing hairs in which dermatophyte?
a)
M. audouinii
b)
M. canis
c)
M. gypseum
d)
M. audouinii & M. canis
15.
Sickle- or boat-shaped macroconidia on cornmeal agar are characteristic of:
a)
Alternaria spp.
b)
Aspergillus spp.
c)
Penicillium spp.
d)
Fusarium spp.
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