2.3 Viral Exanthems Flashcards
What are Macules?
Flat and round
What are Papuans?
Raised
What are vesicles?
Fluid-filled
What are pustules?
Pus-filled
What does urticaria present?
Moves around
What condition has true maculopapular characteristics?
Measles
How long is the measles prodrome?
3-5days
Why do you get a rash in the first place with viruses?
T-cells response
Immunodeficiency doesn’t have rash
Describe the conjunctivitis in measles?
Weepy
No sparing like in Kawasaki’s
Measles complication:
- Pneumonia
- Encephalitis
- Secondary immune deficiency
- oral candidiasis
What is Latin term for measles?
Morbilli
What is a Morbilliform rash?
Measles like rash in appearance
What are Koplik spots?
Associated with measles, happens before the rash in the mouth
What is subacute sclerosing panencephalitis?
Measles: slow virus
2-6 years
Drop attacks
Death
Kawasaki’s disease eye sign?
Episcleritis
Peripheral conjunctivitis
‘Limbal sparing’
What is the ‘third’ disease’?
Rubella
Rubella signs?
Post-auricular lymph node
Rubella symptoms?
Rash
Neck lymphadenopathy
Arthritis
Mild fever
What does the word Rubella mean?
Little red
What does rubelliform rash mean?
Rubella-like - little red
Why is rubella so scary?
Congenital rubella
Cataracts
Sensorineural deafness
Microcephaly
What is the rash where there is circumoral pallor?
Scarlet fever, Group A strep
Signs in Scarlett fever?
Strawberry tongue
Tonsilar exudates
Peeling of fingertips
Amoxicillin can give you a rash with?
EBV
CMV
VZV
What virus is erythema infectiosum?
Parvo Virus B19
Which disease do you get the lace like rash?
Parvo B19
‘Fifth disease’
Rubella too
Incubation for measles?
10-14 days
Incubation for parvo B19?
One week
How long does ‘fifth disease’ last for?
One week incubationone week fever
Then rash
Then lacy rash
Then maybe arthritis
Parvo B19, how does it cause the aplastic anaemia?
- Turns off reticulocytes for a week or so,
- affects the foetus and ppl with sickle cell more
What is the 6th disease?
Rosella infantum
HHV-6 or 7
High fever
How to tell if chicken pox vs. mosquito bits?
Check the scalp
Can varicella go haemorrhaging?
If immunocompromised
If mother has varicella more than a week before child is born how is the baby?
Born with varicella Not as bad, has some antibodies
If mother has varicella less than a week before child is born how is the baby?
- Developers varicella within the week, very sick may die.
- give immunoglobulin
When do you have to worry about zoster in kids?
- If ophthalmic distribution
- needs I acyclovir to protect the eye
HSV-1 is the which virus?
Oral
HSV-2 is the which virus?
Genital virus
Describe herpes simplex virus lesions
Individual punched out lesions
0.5cm
May rupture
Coalesce
Herpes simplex in neonate?
Emergency, needs IV acyclovir
Viral Urticarial rashes describe
Rash moves around
Children may be purple
Often not itchy
Hand foot and mouth disease which virus?
Coxsackie A16
Viral infection rashes tend to do what?
Form lines
Viral exanthems, what exacerbates?
Sunlight
Pressure -
Rubbing - Koebner’s phenomenon
What is Koebner’s phenomenon?
When rubbing exacerbates a viral exanthem
