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Elsevier Mycology (RVSP) > 6. Subcutaneous Mycoses > Flashcards

6. Subcutaneous Mycoses Flashcards

1
Q

3 types of conidiation of dematiaceous fungi

A

Cladosporium type
Phialophora type
Rhinocladiella type

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2
Q

Conidiation of dematiaceous fungi; resembles a tree, in which conidiophore is the trunk and branched chains of conidia form the branches

A

Cladosporium type

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3
Q

Conidiation of dematiaceous fungi; short conidiophores + phialide, vase shaped, conidia extruded from phialide and then cluster

A

Phialophora type

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4
Q

Conidiation of dematiaceous fungi; stalked conidiophores that become knobbly as conidia produced sequentially until a Cladosporium type of conidiation is reached

A

Rhinocladiella type

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5
Q

Specimens for subcutaneous fungi ID is collected by

A

Aspiration

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6
Q

Media for subcutaenous fungi ID

A

SDA

PDA (subculture)

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7
Q

A chronic granulomatous disease of feet (lower extremeties)

A

Mycetoma (Madura foot/Maduromycosis)

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8
Q

2 types of mycetoma

A

Eumycotic

Actinomycotic

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9
Q

Mycetoma granule; mycelium with hyphae 1 μm in diameter

A

Actinomycotic granule

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10
Q

Mycetoma granule; wide hyphae (2-4 μm) terminating in chlamydoconidia

A

Eumycotic granules

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11
Q

Verrucoid (wartlike) lesions on feet, legs, hands, and buttocks

A

Chromoblastomycosis

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12
Q

Microscopic:

Single-celled or clusters of single-cells
Dark pigment

A

Chromoblastomycosis

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13
Q

Culture temp and time for Chromoblastomycosis

A

6 weeks at RT

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14
Q

Subcutaneous mycosis that can have a systemic spread

A

Phaeohyphomycosis

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15
Q

Subcutaneous mycosis that uses the types of conidiation as a guide for ID

A

Chromoblastomycosis

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16
Q

Subcutaneous fungi that causes mycetoma

A

Pseudoallescheria boydii
Exophiala jeanselmei
Acremonium spp.

PEA

17
Q

Subcutaneous fungi that causes Chromoblastomycosis

A
  • Cladophialophora carrionii (Cladosporium type)
  • Fonsecaea pedrosoi (Cladosporium, Phialophora, Rhinocladiella type)
  • Fonsecaea compacta (Cladosporium type)
  • Phialophora verrucosa (Phialophora type)
18
Q

Subcutaneous fungi that causes Phaeohyphomycosis

A

Phialophora verrucosa
Fonsecaea pedrosoi
Exophiala jeanselmei
Wangiella dermatitidis

19
Q

How many days will Cladophialophora carrionii grow?

A

30 days

20
Q

Acquired when not wearing shoes, trauma

A

Cladophialophora carrionii

21
Q

Colonies are grey-green to black on surface and cottony on reverse side within 30 days

A

Cladophialophora carrionii

22
Q

Gray-green to black, cottony colony within 21 days

A

Fonsecaea pedrosoi

23
Q

How many days will Fonsecaea pedrosoi grow?

A

21 days

24
Q

Olive-green to black, velvety colonies

A

Phialophora verrucosa

25
Q

Name for alternate asexual stage of Pseudoallescheria boydii

A

Scedosporium apiospermum

26
Q

Macroscopic:

  • rapid grower
  • white to brownish-gray, fluffy colonies
A

Pseudoallescheria boydii

27
Q

Microscopic:

  • hyaline, septate hyphae
  • single anelloconidia produced on an anellophore (conidiophore)
A

Pseudoallescheria boydii

28
Q

Young cultures: black yeasts

Mature cultures: velvety colonies

A

Exophiala jeanselmei

29
Q

Sticklike coniodiophores with clustered conidia

A

Exophiala jeanselmei

30
Q

Optimum growth temp of Wangiella dermatitidis

A

40-42°C

31
Q

Macroscopic:

  • initially black yeast
  • after 10 days, olive-gray to black velvety or glabrous colony
A

Wangiella dermatitidis

32
Q

Microscopic:

  • pigmented, septate hyphae
  • conidiophores are indistinguishable from vegetative hyphae, except that conidia are clustered at ends
A

Wangiella dermatitidis

33
Q

Has similar morphology to E. jeanselmei

A

Wangiella dermatitidis

34
Q

Etiologic agent of mycetomas, corneal infections, and nail infections

A

Acremonium spp.

35
Q

4 major infections under subcutaneous mycoses

A

Mycetoma
Chromoblastomycosis
Phaeohyphomycosis
Sporotrichosis

Elsevier Mycology (RVSP) (13 decks)

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