Table 2. PCR validation results of gene cluster associated with host specificity.

Cluster No.a	Representative gene		Number of positive isolates (%)		P value
			Human MRSA	Swine MRSA
	Gene symbol	Gene description	N = 76	N = 20
C1	SAV1948	enterotoxin P	67 (88.2)	1 (5)	<0.0001
C2	SAV1979	phi PVL ORF 50-like protein	49 (64.5)	1 (5)	<0.0001
C3	SAV2022	hypothetical protein	50 (65.8)	0	<0.0001
C4	SAV0398	tetM (Tn5801)	64 (84.2)	0	<0.0001
C5	SAV0791	hypothetical protein	58 (76.3)	0	<0.0001
C6	SAV1813	splA	35 (46.1)	2 (10)	0.003
C7	SAV1994	anti repressor	71 (93.4)	2 (10)	<0.0001
C8	SAV1313	hypothetical protein	76 (100)	1 (5)	<0.0001
C9	SAV2498	sarH3	73 (96.1)	1 (5)	<0.0001
C10	SAV0031	pre	3 (21.4)	18 (90)	<0.0001

^aClusters that are not listed were not associated with host specificity.