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mycology > OPPORTUNISTIC INFECTIONS > Flashcards

OPPORTUNISTIC INFECTIONS Flashcards

1
Q

Candida albicans diseases (4)

A

● Oral moniliasis
● Vaginal moniliasis
● Onychomycosis
● Paronychomycosis

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2
Q

thrush

A

Oral moniliasis

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3
Q

vulvovaginitis

A

Vaginal moniliasis

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4
Q

nail infection

A

Onychomycosis

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5
Q

cuticle infection

A

Paronychomycosis

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6
Q

Lab diagnosis for Candida (2)

A
  1. Germ tube
  2. CHROM agar
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7
Q

uses enzymatic reactions to differentiate Candida spp.

A

CHROM agar

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8
Q

hyphae-like extensions of young yeast cells showing parallel sides, are aseptate, and will not constrict at point of origin

A

True germ tube

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9
Q

looks like germ tubes but with septate and constricted at point of origin

A

Pseudohyphae

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10
Q

all Candida exhibit pseudohyphae except

A

Candida glabrata

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11
Q

encapsulated yeast cell in bird and bat droppings

A

Cryptococcus neoformans

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12
Q

demonstrates capsule

A

India ink

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13
Q

demonstrates starburst pattern

A

Gram stain

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14
Q

Causes meningitis

A

Cryptococcus neoformans

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15
Q

Laboratory Diagnosis of C. neoformans
Urease & inositol
Nitrate

A

Urease & inositol (+);
Nitrate (-)

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16
Q

Laboratory Diagnosis of C. neoformans (culture)

A

SDA media without cycloheximide;
birdseed/Niger’s seed/Staib’s

17
Q

causes respiratory infections in immunocompromised patients, esp. AIDS

A

Pneumocystis jiroveci

18
Q

Pneumocystis jiroveci specimen

A

bronchoalveolar lavage

19
Q

Isolation methods (differential test media) [8]

A
  1. Birdseed / Niger’s seed / Staib’s
  2. Cornmeal Agar w/ Tween 80
  3. Cottonseed Agar
  4. Potato Dextrose Agar
  5. Rice Medium
  6. Urea Agar
  7. Nitrate Production Media
  8. Czapek’s Medium
20
Q

Birdseed / Niger’s seed / Staib’s (3)

A

➢ for C. neoformans; detects phenol oxidase
➢ Contains caffeic acid
➢ brown black colonies

21
Q

Cornmeal Agar w/ Tween 80 (3)

A

➢ for Candida spp.
➢ Chlamydospore production
➢ stimulates conidia & chlamydospore production

22
Q

Cottonseed Agar (2)

A

➢ for B. dermatitidis
➢ induces conversion of mold to yeast

23
Q

Potato Dextrose Agar (3)

A

➢ induces pigment production of T. rubrum
➢ Red color colonies
➢ stimulates conidia production

24
Q

Rice Medium

A

differentiates Microsporum spp

25
Q

Urea Agar (3)

A

➢ differentiates T. rubrum (-) & T. mentagrophytes (+)
➢ detects urease of Cryptococcus neoformans
➢ Red positive color

26
Q

Nitrate Production Media

A

for C. neoformans

27
Q

Czapek’s Medium

A

species identification of Aspergillus

mycology (7 decks)

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