Week 3- Viral & Fungal Skin Infections Flashcards Preview

Dermatology Diploma > Week 3- Viral & Fungal Skin Infections > Flashcards

Flashcards in Week 3- Viral & Fungal Skin Infections Deck (20)
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1

Vesicles are ususally caused by which viruses?

  • Herpes Simplex
  • Varicella Zoster
  • Poxviruses
  • Coxsackie virus
  • Entero/echo viruses

2

What is the incubation period for chickenpox?

21 days

3

Does chickenpox (varicella) start peripherally or centrally?

Centrally

It is very rare on the hands and feet.

4

What is a complication of chickenpox?

Varicella Pneuomonitis

5

What 2 dermatomal branches does Herpes Zoster usually manifest on?

  1. T5-L2
  2. The opthalmic branch of the trigeminal nerve

6

What 2 ways can you diagnose Varicella infection?

  1. Serology
    • VZV IgG- previous exposure - shingles likely.
    • VZV IgM - acute infection - chickenpox.
  2. Direct Immunofluorescence
    • Viral swab the base of the lesion.

7

What is the management for pregnant women who have been exposed to Varicella?

  • If immune - no action
  • If Unsure or not immunised- check VZV IgG
    • VZV IgG present - no action needed.
    • VZV IgG not present - Give VZV Antiboies.

8

What skin infections can herpes simplex cause?

  • Gingivostomatitis
  • Genital infection
  • Eczema Herpeticum
  • Herpetic whitlow
  • Erythema Multiforme (Mycoplasma and HSV are the most common cause)
  • Cold sores

9

What 2 skin infections does the Coxsackie Virus cause?

  1. Hand Foot and Mouth
  2. Herpangina

10

What viruses cause maculopapular rashes?

  • Rubella
  • Parvovirus
  • Entero/Echovirus
  • Measles
  • EBV
  • CMV
  • Dengue

11

What is the usual manifestation for Slapped Cheek?

  • Brief febrile illness withcough
  • 7 days of feeling well
  • Rash develops around cheeks and then 1-4 days later appears on the limbs.
  • It lasts 1-3 weeks.

12

What is a complication of Parvovirus B19?

Viral arthritis

It is non-destructive and can last up to 1 year.

13

What virus is usually misdiagnosd as measles?

Roseola Infantum

(HHV6)

14

In what condition do you get Koplick spots?

Measles

15

Pityriasis Rosea present with a herald patch and then a maculopapular rash. How long does itlast for?

40 days and 40 nights :-)

16

What is this and what is it's treatment?

Pityriasis versicolor

Wood's lamp=pale yellowfluorescence.

 

Treatment

  • Selsun shampoo
  • Ketoconoazole shampoo
  • Lamisil
  • Oral Imidazoles

17

What is the treatment for molloscum contagiosum?

  • Molludab in the UK
  • Immiquimod -if they are widespread and many
  • Topical acids - Salicylic or TCA
  • Podophyllotoxincream
  • Cryotherapy
  • Adapelene (Retinoic acid)
  • Curretage

18

What is the most common cause of Erythema Multiforme?

HSV

19

What is this and what is the treatment?

Tinea Capitis

Oral Griseofulvin 15-20mg/kg/day for 6-8 weeks.

(Hair usualy regrows after and close contacts should be treated with ketoconazole shampoo)

20

What is this?

hyytr

It is usually wrongly diagnosed as a bacterial infection.

Treatment is with oral antifungals.