Derm - Viral Conditions

Question 1

what is pityriasis rosea?

Answer 1

inflammatory skin disease preceded by a flu like illness

Question 2

features of pityriasis rosea?

Answer 2

herald patch
pruritis
scale
small pink ovals on trunk

Question 3

Tx for pityriasis rosea?

Answer 3

reassurance (2-12wks to resolve)
emollients
antihistamines

Question 4

what complications can occur due to pityriasis rosea?

Answer 4

skin pigment alteration

Question 5

how does shingles occur?

Answer 5

VZ infection is latent in dorsal/cranial nerve root ganglia

reactivates and causes dermatomal rash

Question 6

features of HZV?

Answer 6

prodromal phase
dermatomal pain
itch
erythematous rash
clear vesicles
crust

Question 7

Tx for HZV?

Answer 7

analgesia
calamine lotion
antivirals if 48/72hrs of rash
stay off work until oozing stops

Question 8

complications of HZV?

Answer 8

encephalitis
chronic pain
opthalmicus

Question 9

features of VZ?

Answer 9

fever
itch
headache
malaise
mucous membranes affected
macules
vesicles
scabbing

Question 10

Tx for VZV?

Answer 10

paracetamol

calamine lotion

Question 11

Tx for VZV in pregnancy?

Answer 11

VZIG given to mums if no exposure

+/- acyclovir if in time frame

Question 12

complications of VZV?

Answer 12

pneumonia
encephalitis
shingles
meningitis

Question 13

what viruses commonly cause warts?

Answer 13

HPV 6 and 11

Question 14

features of warts?

Answer 14

slow growing
papules
black dots on surface

Question 15

Tx for warts?

Answer 15

salicylic acid

cryotherapy

Question 16

features of molloscum contagiousum?

Answer 16

itch
pearly rounded nodules
central dell

Question 17

how does a HSV infection occur?

Answer 17

virus replicates in epidermis
invade nerve endings and become latent
life long infection that reactivates

Question 18

features of a HSV infection?

Answer 18

fever
tingling 
lymphadenopathy 
dysuria
vesicular lesions-> ulcer -> crust
pain

Question 19

Ix for HSV infection?

Answer 19

PCR of unroofed ulcer

Question 20

Tx for HSV infection?

Answer 20

acyclovir
analgesia
abstain from contact

Question 21

what causes erythema infectiousum?

Answer 21

parovirus B19 infection

Question 22

features of erythema infectiousum?

Answer 22

1-2wk prodrome
flu like illness
slapped cheek
erythematous macules and papules of the arms

Question 23

Ix for erythema infectiousum? why?

Answer 23

clinical
RBC

may be anaemic due to haemolysis causes by virus

Question 24

Tx for erythema infectiousum?

Answer 24

paracetamol
ibuprofen
fluids

Question 25

how long are kids infective with when they have erythema infectiousum?

Answer 25

no longer infectious once rash appears

Question 26

what should pregnant women do if they come into contact with erythema infectiousum?

Answer 26

IgM and IgG done if <20wks pregnant