Dermatophytes (PART 2) Flashcards

0
Q

Epidermophyton floccosum:

- what does it infect

A
  • skin and nails (not hair) … Especially tinea cruris
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1
Q

Trichophyton violaceum:

- colonies

A

Purple (violet-violaceum)

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2
Q

Epidermophyton floccosum:

- colonies

A

Tan to yellowish to khaki

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3
Q

Epidermophyton floccosum:

- macro and microconidia

A

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

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4
Q

Epidermophyton floccosum:

- how do you kill it?

A

Killed by refrigeration

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5
Q

Microsporum:

- infections involve what?

A

only hair and skin

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6
Q

Microsporum canis:

- number one found in what?

A

Dogs and cats

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7
Q

Microsporum canis:

- Color of reverse

A

Bright yellow (with continuous growth)

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8
Q

Microsporum canis:

- microscopic evaluation

A

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

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9
Q

Microsporum canis:

- Woods lamp reaction

A

Yellow green fluorescence

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10
Q

Microsporum canis:

- what kind of infection in the hair

A
  • Ectothrix Infection (outside of hair)
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11
Q

Microsporum gypseum:

- _______ fungus, rare in humans

A

Soil

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12
Q

Microsporum gypseum:

- colonies

A

Powdery, buff/cinnamon colored

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13
Q

Microsporum gypseum:

- reverse

A

Yellow/orange/brown

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14
Q

Microsporum gypseum:

- microscopic appearance

A
  • macroconidia: ellipsoidal with blunt ends, thin cell wall two to seven cells
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15
Q

Microsporum audouinii:

- common cause of what?

A
  • tinea capitis in children; spread person-to-person
16
Q

Microsporum audouinii:

- colonies

A

Light gray

17
Q

Microsporum audouinii:

- reverse

A

Pink

18
Q

Microsporum audouinii:

- microscopic appearance

A
  • conidia not usually seen; Racquet or antler shaped hyphae

- ??? Terminal chlamydoconidia and comblike hyphae

19
Q

Microsporum audouinii:

- Woods lamp reaction

A

Yellow green florescence