Rashes: Time of appearance, after onset of fever
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Appearance of rash in a febrile patient,
- 1st day: Rubella
- 2nd day: Scarlet fever/ Smallpox
- 3rd day: Chickenpox (1- 5 days)
- 4th day: Measles (Koplik spots seen a day prior to the rash)
- 5th day: Typhus & rickettsia (this is variable)
- 6th day: Dengue (Morbilliform, over dorsum of hands and feet; trunk)
- 7th day: Enteric fever (Rose spots over abdomen, flanks and back)
This mnemonic for exanthematous fevers is based on the average time of appearance of skin rashes, after the onset of fever.
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