Dermatophytes (PART 2) Flashcards Preview

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Flashcards in Dermatophytes (PART 2) Deck (20):
0

Trichophyton violaceum:
- colonies

Purple (violet-violaceum)

1

Epidermophyton floccosum:
- what does it infect

- skin and nails (not hair) ... Especially tinea cruris

2

Epidermophyton floccosum:
- colonies

Tan to yellowish to khaki

3

Epidermophyton floccosum:
- macro and microconidia

Macro: smooth and thin-walled, club shaped (beavers tail), 2 to 4 celled
Micro: NONE!!

4

Epidermophyton floccosum:
- how do you kill it?

Killed by refrigeration

5

Microsporum:
- infections involve what?

only hair and skin

6

Microsporum canis:
- number one found in what?

Dogs and cats

7

Microsporum canis:
- Color of reverse

Bright yellow (with continuous growth)

8

Microsporum canis:
- microscopic evaluation

Walls are thick and rough, consisting of 3 to 15 cells and having a curved tip

9

Microsporum canis:
- Woods lamp reaction

Yellow green fluorescence

10

Microsporum canis:
- what kind of infection in the hair

- Ectothrix Infection (outside of hair)

11

Microsporum gypseum:
- _______ fungus, rare in humans

Soil

12

Microsporum gypseum:
- colonies

Powdery, buff/cinnamon colored

13

Microsporum gypseum:
- reverse

Yellow/orange/brown

14

Microsporum gypseum:
- microscopic appearance

- macroconidia: ellipsoidal with blunt ends, thin cell wall two to seven cells

15

Microsporum audouinii:
- common cause of what?

- tinea capitis in children; spread person-to-person

16

Microsporum audouinii:
- colonies

Light gray

17

Microsporum audouinii:
- reverse

Pink

18

Microsporum audouinii:
- microscopic appearance

- conidia not usually seen; Racquet or antler shaped hyphae
-??? Terminal chlamydoconidia and comblike hyphae

19

Microsporum audouinii:
- Woods lamp reaction

Yellow green florescence