Condition | Incubation period | Prodrome | Rash | Other Dx features |
Measles (Rubeola) |
9-14 days | Fever Cough, Conjunctivitis Rhinitis | Maculopapular – face to extremities | Koplik spots in mouth |
Mumps (Parotitis) |
12-25 days |
Pain/swelling in front of/below ear |
||
Rubella (German Measles) |
14-21 | None |
Maculopapular – rapid spread from head to toe |
Teratogenic, “Blueberry muffin baby” |
Varicella (Chicken Pox) |
10-21 days |
Vesicular, erythematous rash on torso, then face and extremities |
Dew drop on a rose petal |
|
Roseola (Roseola Infantum) |
10-14 days | Fever (3-4 days) | Pink, macular rash |
Fever resolves then rash appears |
Erythema Infectiosum (Fifth Disease, Slapped Cheek) |
4-14 days |
None |
Red facial rash “slapped cheek”, lacy pink macular rash on torso |
|
Kawasaki Disease (Mucocutaneous lymph node syndrome) |
Unknown | Fever Adenopathy | Rash on trunk and extremities Red palms, soles | Fever > 5days and 4 of the following:
|