9- Derm - Viral infections - VZV

Question 1

two derm diseases caused by VZV

Answer 1

chicken pox

shingles

Question 2

c pox - transmission? incubation time? infective period?

Answer 2

droplet
2-3wk incubation
infective 4d before, until all lesions scabbed

Question 3

c pox - Sx

Answer 3

fever, malaise, headaches, then vesicles with crusting on trunk, face, scalp - lasts 1-2 weeks

Question 4

c pox complications more common in adult infections

Answer 4

pneumonia, hepatitis, encephalitis

Question 5

c pox other complications

Answer 5

disseminated infection in immcomp

2% risk of foetal damage in first 20 weeks of pregnancy

Question 6

c pox mgmt

Answer 6

adult/immcompr -> oral aciclovir

Question 7

Shingles - pathology? Sx? length?

Answer 7

reactivation of VZV in dorsal root ganglia

pain/tingling preceded by eruption of vesicles in dermatomal distribution (lasts 1-2 weeks)

Question 8

shingles - where? 1 important feature?

Answer 8

commonly thoracic then cervical

patients are infectious

Question 9

neuro complications of shingles

Answer 9

CN palsies
post-herpetic neuralgia- occurs in 30%
vestibulocochlear involvement - Ramsay Hunt syndrome

Question 10

other complications of shingles

Answer 10

secondary infection
eye complications - Herpes Zoster Ophthalmicum
Encephalitis and meningitis

Question 11

shingles mgmt

Answer 11

severe? immcompr? > oral aciclovir