PIGG and scarlet fever: The occurrences of scarlet fever in central Taiwan between 2000 and 2006 were primarily caused by six emm clones: emm12 (40.0%), emm4 (23.2%), emm1 (16.3%), SmaI-resistant emm12* (10.3%), emm6 (3.8%) and emm22 (2.9%).