Skin!

Question 1

Impetigo

Answer 1

bacterial infection of the epidermis

Question 2

Cellulitis

Answer 2

infection of the dermis

Question 3

folliculitis

Answer 3

bacterial infection of appendages

Question 4

What does stratum corneum do?

Answer 4

prevent water loss, chemical entry

Question 5

What does dermis do?

Answer 5

It is tough, repels physical insults

Question 6

What does subcutaneous fat do?

Answer 6

protects underlying structures from injury

Question 7

Bacterial infections of skin

Answer 7

Impetigo

Folliculitis

Question 8

Viral infections of skin

Answer 8

Herpesvirus
molluschi contagiosi
Verruca vulgaris

Question 9

Fungal infections of skin

Answer 9

Tinea versicolor
Tinea corporis
Deep fungal infection

Question 10

Infestation

Answer 10

Scabies

Myiasis

Question 11

Normal skin flora

Answer 11

Aerobic cocci, aerobic and anaerobic coryneform bacteria, gram negative bacteria, yeast

Question 12

Infectious panniculitis/fascitis

Answer 12

bacterial infection of fat layer/fascia

Question 13

Most cutaneous infections are caused by

Answer 13

Staph aureus

Question 14

Destruction of follicle wall, PMNs. What it is?

Answer 14

Folliculitis- treat with antibacterial soap, topical or systemic antibiotics

Question 15

papovavirus

Answer 15

warts

Question 16

DNA viruses infect

Answer 16

keratinocytes

Question 17

RNA viruses infect

Answer 17

CD4 helper T cells

Question 18

Viral infections of the epidermis

Answer 18

Molluschi contagiosa
Herpesvirus
Verruca

Question 19

What is an appendage viral infection of skin?

Answer 19

Folliculitis from herpes virus

Question 20

A positive interpretation of the Tzanck smear requires

Answer 20

identification of multi-nucleated keratinocytes

-peripheral margination of chromatin (ground glass appearance)

Question 21

If you have a negative reading of a Tzanck smear, what should you do?

Answer 21

It is probably still herpes. Scrape again. It if pretty specific and sensitive

Question 22

How does Herpes Varicella Zoster happen?

Answer 22

reactivation of varicella zoster virus (chicken pox) from the dorsal root ganglion. Travels down nerve into skin. Usually in immunosuppressed and old people. Usually unilateral in one dermatome

Question 23

Double stranded DNA viruses:

Answer 23

Herpes simplex 1 and 2
Varicella (chicken pox, herpes)
Cytomegalo virus
Epstein-Barr (infectious mono)

Question 24

Herpetic whitlow

Answer 24

Herpes in your digits

Question 25

Eczema herpeticum

Answer 25

life threatening infection of a pre-existing skin rash, usually atopic dermatitis

Question 26

Herpes Zoster

Answer 26

Shingles or chickenpox

Question 27

Where does oral herpes occur?

Answer 27

keratinized tissue (palate, gingiva, tongue)

Question 28

Oral Hairy Leukoplakia

Answer 28

Epstein-Barr virus (EBV) Common in HIV patients, immunosuppressed, smokers Usually don't have to treat. Or systemic antivirals, (acyclovir and brothers)

Question 29

Henderson-patterson bodies

Answer 29

molluscum bodies. (Pox virus causes red inclusions). Little kids and STD. Cause umbellicated spots

Question 30

What are the signs of HPV

Answer 30

Thick granular cell layer with koilocytes

Question 31

What are the HPVs of Verruca vulgaris

Answer 31

HPV 1,2,4, 27, 57, 63

Question 32

What are the HPVs of Verruca Plantaris?

Answer 32

HPV 1,2,4,27,57

Question 33

What are the HPVs of Verruca plana

Answer 33

HPV 3,10,28,41

Question 34

What are the HPVs of genital warts or condyloma?

Answer 34

HPV 6,11

Question 35

Fungal infections of the epidermis/stratum corneum

Answer 35

Tinea versicolor | Dermatophytosis

Question 36

If a rash is scaly,

Answer 36

do a KOH preparation to make sure it isn't fungus (if it is, steroids will make it worse)

Question 37

What causes Tinea Versicolor

Answer 37

Pityrosporum orbiculare

Question 38

Dermatophyte infection

Answer 38

Can only survive on dead keratin or hair and nails (aka ringworm)

Question 39

What do you see with paracoccidoidomycosis?

Answer 39

Mariner's wheel

Question 40

What is the key risk factor for deep fungal infections?

Answer 40

Neutropenia (immunosuppression is big too)

Question 41

Common fungal deep infections

Answer 41

Candidiasis Aspergillosis (These can be life threatening)

Question 42

Where does a scabies mite lay eggs?

Answer 42

In the stratum corneum (circle of hebra: wrists, hands, genital region, axilla)

Question 43

Botflies are an example of

Answer 43

Myiasis