December 4, 2015 - Infection Flashcards Preview

COURSE 2 > December 4, 2015 - Infection > Flashcards

Flashcards in December 4, 2015 - Infection Deck (23):
1

Signs of Inflammation

Redness

Heat

Pain

Swelling

2

Common Organisms for Bacterial Skin Infection

Staphylococcus aureus

Streptococcus pyogenes

Group A Streptococcus

3

Impetigo

Caused by S. aureus

Rapidly evolving generalized exfoliative disease of young infants. Has "honey-coloured crusts".

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4

Staph Scalded Skin

Caused by S. aureus

Epidermolytic toxin seperates skin below the stratum corneum. This is not full thickness skin peeling. Systemic reaction to exotoxin.

 

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5

Folliculitis

Inflammation of the follicles.

Acne vulgaris is technically a folliculitis.

6

Furuncle

A deeper folliculitis.

Often called a boil.

Tender is hot, with a single draining opening. Typically a few deep hair follicles that are involved with S. aureus.

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7

Carbuncle

Multiple deep communicating furuncles.

These have multiple draining openings.

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8

Ecthyma

Often caused by Streptococcus pyogenes

Punched out deep ulcers.

Often heal with scarring.

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9

Cellulitis

Deeper seated infection of S. aureus

Local erythema and swelling that spreads rapidly

Skin often shows superficial necrosis after several days without treatment

 

Strep cellulitis can occur too and spreads much more rapidly (48 hours).

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10

Lymphangitis

Inflammation tracking up lymphatic vessels

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11

Erysipelas

Actute beta hemolytic group A strep

Involving superficial dermal lymphatics

Dharpyl marginated painful plaque

May have systemic symptoms

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12

Necrotizing Fasciitis

"Flesh eating disease"

Intense pain is often the first symptom, then cutaneous changes come late. This spreads across fascial planes and causes necrosis of subcutaneous tissue and fascia. Patients can get ill very, very quickly.

Often caused by strep and often needs surgical debridement.

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13

Chicken Pox

"Dew drop on a petal"

Caused by Varicella zoster

Lesions appear in three successive "crops"

Heals in 10-14 days

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14

Shingles

Reactivation of Varicella zoster

Dermatomal in distribution

Major complication is post-herpetic neuralgia

 

Give antivirals, ideally in first 72 hours.

15

Warts

Caused by HPV

 

70% gone in a year, 90% gone in two. Remove only if unsightly or causing pain.

If lots of warts, consider immunodeficiency.

16

Molluscum Contagiosum

Pox (DNA) Virus

Umbilicated papules

Considered an STD

* May appear with eczema. Do not put steroids on. If requiring treatment, may be cryo'd, keratolytized, laser'd etc.

17

Dermatophyte Infections

What you see is the host reaction to the fungus.

Consider fungal scraping for all atypical scaling inflammatory dermatoses.

18

Tinea Pedis

Fungal infection of the feet. (dermatophyte)

19

Tinea Unguis

Fungal infection of the nail. (dermatophyte)

Very difficult to treat. Requires systemic anti-fungals for ~3 months

20

Candidiasis

Candida albicans

NOT normal for thrush to be seen after 1 year of age. Think immunodeficiency.

21

Tinea Versicolour

Malassezia globosa

Species of yeast that is a normal colonizer of adult skin. Causes discolouration of the skin in the affected areas.

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22

Scabies

A parisitic infection that is intensely pruritic. Burrows are found on the hands in adults, and in the scamp and feet for children.

A massive pain in the ass.

23

Lice

Have to remove each of the knits.

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