CCL28 and methicillin-resistant staphylococcus aureus infectious disease: Most HA-MRSA infections are SCCmec types I, II, and III, while CA-MRSA infections are SCCmec types IV and V.1,2 In this study, two multiplex PCR systems were used: the first was developed by Oliveira and Lencastre, which identified four SCCmec types using characteristic genes in junkyard regions; the second was developed by Zhang et al. 3,4 Both systems identified the mec and ccr region, although they differ slightly with respect to primer sequences and target genes.