Viral Exanthemas

Question 1

What causes measles?

Answer 1

Measles virus

Question 2

Measles symptoms

Answer 2

Fever, conjunctivitis, coryzal symptoms

Question 3

What are koplik spots?

Answer 3

Greyish white spots on the buccal mucosa

Question 4

In what condition are koplik spots pathognomonic?

Answer 4

Measles

Question 5

Describe the measles rash

Answer 5

Starts on face classically behind ears, then spreads to rest of body
Erythematous
Macular

Question 6

Describe the scarlet fever rash

Answer 6

red-pink, blotchy, macular rash with rough “sandpaper” skin that starts on the trunk and spreads outwards.
Patients can have red, flushed cheeks

Question 7

What causes rubella?

Answer 7

Rubella virus

Question 8

What kind of rash does rubella have, and how does it compare to measles?

Answer 8

Erythematous macular
Milder than measles

Question 9

What other symptoms does rubella have?

Answer 9

Fever
Joint pain
Sore throat

Question 10

Which of rubella and measles causes conjunctivitis?

Answer 10

Measles

Question 11

What other name is there for erythema infectiosum?

Answer 11

Slapped cheek

Question 12

What virus causes erythema infectiosum?

Answer 12

Parvovirus B19

Question 13

Describe the rash course and appearance for erythema infectiosum (slapped cheek)

Answer 13

Appears suddenly as diffuse bright red rash on both cheeks
Reticular rash on trunk 2-5 days later that can be raised and itchy

Question 14

When is erythema infectiosum no longer infectious?

Answer 14

When rash has appeared

Question 15

What viruses cause roseola infantum?

Answer 15

Human herpesvirus 6 (occasionally 7)

Question 16

Describe the time course of roseola infantum infection

Answer 16

High fever and coryzal symptoms for 3-5 days
After this rash for 1-2 days