Table 1.

Superantigen- and Other Virulence Factor–Encoding Genes Found in the Different emm74 Genotypes Circulating in Canada

Genotype	Strain	Superantigen-Encoding Gene											Virulence Factor-Encoding Gene
		speA	speC	speG	speH	speI	speJ	speK	speL	speM	smeZ	ssa	slaA	spd1	spd3	speB
Epidemic clone (n = 136)	NGAS979 and 135 others	+	+	+	+	+	-	-	-	-	+	-	-	+	-a	+
Ontario close outliers (n = 4)	8198, 22173, 22351, NGAS664	+	+	+	+	+	-	-	-	-	+	-	-	+	-	+
Ontario distant outliers (n = 2)	1018, 5870	+	+	+	+	+	-	-	-	-	+	-	-	+	-	+
Alberta 2012 (n = 1)	SC173172	+	-	+	+	+	-	+	-	-	+	-	+	-	-	+
Saskatchewan distant outliers (n = 2)	SC152081, SC152083	+	-	+	+	+	-	+	-	-	+	-	+	-	-	+
New Brunswick distant outlier (n = 1)	SC132849	+	-	+	+	+	-	-	-	-	+	-	-	-	+	+
Alberta 2003 (n = 1)	SC173171	+	-	+	+	+	-	-	-	-	+	-	-	-	+	+

^aOne epidemic isolate was positive for spd3.