8.1 Skin Infections Flashcards

1
Q

HSV commonly seen where?

A

Lip

Tingling sensation before blisters

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2
Q

Clues to dx HSV?

A

Lesions grouped
Lesions coalesce
Geographical pattern
Edge is scalloped

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3
Q

If HSV on newborn scalp what to watch out for?

A

Systemic involvement, medical emergency

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4
Q

Punched out lesions can be indicative of?

A

HSV erosions
Haemorrhaging
May crust
Punched out

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5
Q

Another clue for HSV infection around skin?

A

SWELLING

Along with punched out lesions

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6
Q

What is HSV inside mouth?

A

Hermetic gingivostomatitis

Swelling of cheek, airway compromise

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7
Q

What is you get HSV with someone with eczema?

A

Eczema herpeticum

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8
Q

How to treat Eczema herpeticum?

A

Oral acyclovir

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9
Q

Dose of acyclovir for children?

A

10mg/kg
5times/day
10days

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10
Q

What is herpetic whitlow?

A

Dentists no gloves, repeated intermittent herpetic infection in same place

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11
Q

HSV chronic ulcer happens to who usually?

A

Immune deficiency

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12
Q

Children with zoster present how?

A

Multiple dermatomes
No neuralgia
Not immunosuppression

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13
Q

Children with zoster, time window for anti-virals?

A

Within 72 hours

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14
Q

When do you have to admit a child for zoster?

A

If in trigeminal nerve distribution, ophthalmic complications,
IV acyclovir

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15
Q

Viral warts caused by?

A

Papilloma virus

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16
Q

Papilloma virus treatment?

A
  • Usu. resolve spontaneously
  • keratolytic agents
  • oral cimetidine
  • cryotherapy
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17
Q

Are viral warts infectious?

A

Yes

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18
Q

Plantar warts treatment?

A

Formalin
Peel back skin to expose
3/12

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19
Q

Planar warts Rx?

A

0.05% topical retinoids acid for 3/12

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20
Q

Where do you see Filiform warts? Rx?

A

Mucocutaneous junctions

Rx with diathermy

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21
Q

Perineal warts in a child, need to think?

A

?child abuse

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22
Q

What happens when you use diathermy for warts on a cutaneous surface?

A

Ring of recurrence

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23
Q

When is it appropriate to use diathermy for warts?

A

Only on mucosal surfaces

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24
Q

Subuncal warts worry?

A

Once treated nail will go back to normal because warts only affect the epidermis

25
Q

Molluscum contagiosum looks like?

A

Pearly Papules with umbilical top

26
Q

Molluscum contagiosum is what kind of virus?

A

Pox

27
Q

Molluscum contagiosum how transmitted?

A

Swimming pools

Warm water

28
Q

Molluscum contagiosum treatment?

A
No warm water baths
Shower
No swimming
No sponge/washer
For 2-4 weeks
29
Q

Molluscum contagiosum treatment large lesions?

A

Physically remove/deroof
Expose the white bit
Remove it.
Must remove all of them

30
Q

Tell tale sign of Molluscum contagiosum?

A

Central punctum

31
Q

Impetigo lesions look how?

A

Honey coloured crusty cornflake-like lesions

32
Q

Impetigo caused by?

A

Staph aureus

33
Q

If Impetigo is large and flat?

A

Bulbous impetigo

34
Q

Impetigo deeper?

A

Boils and abscesses

35
Q

What is scalded skin syndrome?

A

Staph aureus makes a toxin, looks like a burn

36
Q

Who are at risk for scalded skin syndrome?

A

-children under 5 and neonates most at risk

37
Q

How to differentiate scalded skin syndrome?

A

No mucosal involvement

38
Q

How to treat perinanal group A strep pyogenes?

A

Oral Abx, not topical

39
Q

How does perinatal strep pyogenes present?

A

Very painful
Baby doesn’t want to poo
Overflow incontinence

40
Q

What does tinea lesions look like?

A

Annular lesions on skin

41
Q

Any annular lesions, think of?

A

Fungal until proven otherwise

42
Q

How to dx tinea?

A

Skin scraping of active edge

43
Q

tinea vector?

A

Cats, guinea pigs, dogs, rabbits

44
Q

tinea Rx? Simple

A

Topical lamisil

45
Q

Eczema and psoriasis distribution?

A

Symmetrical

46
Q

Any Assymetrical lesion, think of?

A

?Tinea

47
Q

If there’s a rash you’ve never seen, only one leg, doesn’t look like eczema, no psoriasis. What should you think of?

A

TINEA incognito (not annular cause treated with steroids)

48
Q

What is mainstay treatment for tinea capitis?

A

Oral antifungals

49
Q

Ectothrix vs. endothrix in tinea capitis looks different how?

A

Fungal spores inside hair follicle vs. outside hair follicle

Endothrix: black dot tinea

50
Q

What is a Kerion?

A

Inflammatory tinea
Boggy swelling, loss of hair
Child is Systemically well
Lots of scarring

51
Q

Kerion Rx?

A

Oral antifungal for 3 months

52
Q

What is tinea versicolor?

A

Cause by mall Essex is yeast

53
Q

Tinea versicolor looks how?

A

Hyperpigmented in fair skinned

Hypopigmented in dark skinned

54
Q

Tinea versicolor infectious?

A

Yes

55
Q

Scabies most prominent symptom? Burrows?

A

Incredible itch
Rarely burrows in kids
Less interdigital

56
Q

Where scabies in kids present?

A

Soles of feet

Palms of hands

57
Q

Scabies Rx?

A

Full body Permethrin cream for 2/52

WHOLE family

58
Q

If a child under 1 has dermographism, then they have?

A

Scabies until proven otherwise