KS and scarlet fever have similar clinical presentations.
Both illnesses have an acute onset typically
marked by fever. In KS, the presence of fever for 5
days or more is an essential diagnostic criteria. It is
often high, peaking above 39C (102F) and refractory
to antipyretics, lasting for days to weeks in the
absence of treatment.1 Ninety percent of patients
infected with GAS report fever to varying degrees.4