6. Subcutaneous Mycoses Flashcards Preview

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Flashcards in 6. Subcutaneous Mycoses Deck (35):
1

3 types of conidiation of dematiaceous fungi

Cladosporium type
Phialophora type
Rhinocladiella type

2

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

Cladosporium type

3

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

Phialophora type

4

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

Rhinocladiella type

5

Specimens for subcutaneous fungi ID is collected by

Aspiration

6

Media for subcutaenous fungi ID

SDA
PDA (subculture)

7

A chronic granulomatous disease of feet (lower extremeties)

Mycetoma (Madura foot/Maduromycosis)

8

2 types of mycetoma

Eumycotic
Actinomycotic

9

Mycetoma granule; mycelium with hyphae 1 μm in diameter

Actinomycotic granule

10

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

Eumycotic granules

11

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

Chromoblastomycosis

12

Microscopic:

Single-celled or clusters of single-cells
Dark pigment

Chromoblastomycosis

13

Culture temp and time for Chromoblastomycosis

6 weeks at RT

14

Subcutaneous mycosis that can have a systemic spread

Phaeohyphomycosis

15

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

Chromoblastomycosis

16

Subcutaneous fungi that causes mycetoma

Pseudoallescheria boydii
Exophiala jeanselmei
Acremonium spp.

PEA

17

Subcutaneous fungi that causes Chromoblastomycosis

- Cladophialophora carrionii (Cladosporium type)
- Fonsecaea pedrosoi (Cladosporium, Phialophora, Rhinocladiella type)
- Fonsecaea compacta (Cladosporium type)
- Phialophora verrucosa (Phialophora type)

18

Subcutaneous fungi that causes Phaeohyphomycosis

Phialophora verrucosa
Fonsecaea pedrosoi
Exophiala jeanselmei
Wangiella dermatitidis

19

How many days will Cladophialophora carrionii grow?

30 days

20

Acquired when not wearing shoes, trauma

Cladophialophora carrionii

21

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

Cladophialophora carrionii

22

Gray-green to black, cottony colony within 21 days

Fonsecaea pedrosoi

23

How many days will Fonsecaea pedrosoi grow?

21 days

24

Olive-green to black, velvety colonies

Phialophora verrucosa

25

Name for alternate asexual stage of Pseudoallescheria boydii

Scedosporium apiospermum

26

Macroscopic:

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

Pseudoallescheria boydii

27

Microscopic:

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

Pseudoallescheria boydii

28

Young cultures: black yeasts
Mature cultures: velvety colonies

Exophiala jeanselmei

29

Sticklike coniodiophores with clustered conidia

Exophiala jeanselmei

30

Optimum growth temp of Wangiella dermatitidis

40-42°C

31

Macroscopic:

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

Wangiella dermatitidis

32

Microscopic:

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

Wangiella dermatitidis

33

Has similar morphology to E. jeanselmei

Wangiella dermatitidis

34

Etiologic agent of mycetomas, corneal infections, and nail infections

Acremonium spp.

35

4 major infections under subcutaneous mycoses

Mycetoma
Chromoblastomycosis
Phaeohyphomycosis
Sporotrichosis