Fungal Infections Flashcards

1
Q

What are the 3 broad categories on fungal infections in dermatology?

A

Superficial
Deeper
Systemic

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2
Q

What is a superficial fungal infection?

A

Infect skin via stratum corneum, hair and nails

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3
Q

What is a deeper fungal infection?

A

Can go into SCT and dermis

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4
Q

What are systemic fungal infections?

A

Blood borne

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5
Q

What is the most commonly seen fungal infection in dermatology?

A

Dermatocyte infections

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6
Q

How do dermatocyte infections reach humans? (3)

A

Human-human
Animal-human
Soil-human

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7
Q

In tinea corpis, which part of the skin is usually affected?

A

Glabrous (non-hairy skin) on the body

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8
Q

In tinea corpis what is the rash like?

A

Very itchy

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9
Q

3 species causing tinea corporis

A

T rubrum
M canis
T verrucosum

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10
Q

Where does Tinea cruris affect?

A

The groin

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11
Q

Is Tinea cruris more common in men or women?

A

Men

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12
Q

Causative agent in Tinea cruris

A

T rubrum

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13
Q

How does tinea cruris present?

A

Begins as well demarcated pruritis erythematous plaque on thighs –> pubic, suprapubic, perianal + buttock regions

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14
Q

Where does tinea manuum form?

A

Hands

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15
Q

Tinea manuum presentation

A

Asymetrical involvement wit scarring
> Prominent one hand
Rash spreads from dorsum proximally

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16
Q

Another name for Tinea pedis

A

athlete’s foot

17
Q

More common presentation of athlete’s foot?

A

White maceration between toe webs

18
Q

When v severe, how does athletes foot present?

A

Scaling, pustules, erythema on sole foot

19
Q

What is mossacin feet?

A

When athletes foot is widespread and bilateral

20
Q

Where is ochomycosis most common?

A

Feet

21
Q

How does onchomycosis present?

A

Distal white discoloration
Loss of nail plate
Onycholysis
Hyperkeratosis

22
Q

DDx onchomycosis

A

Psoriasis

23
Q

Who is particularly prone to tinea capitis?

A

Children

24
Q

How does tinea capitis present?

A

Patchy hair loss with varying degrees of scale, erythema and pustules

25
Q

What is a Kerion?

A

–> Boggy painful swelling w/ assoc alopecia + regional lymphadenopathy
Occasionally happens in Tinea capitis

26
Q

Investigations for fungal infections (4)

A

Skin scrapings
Nail clippings –> microscopy + culture
Hair samples –> mycological exam
If fungi fluoresce - wood lamp

27
Q

Tx localised fungal skin infections

A

Miconazole
Or
TO terbinafine

28
Q

Most effective Tx nail, scalp, hair infection or widespread fungal skin infection

A

Terbinafine