Table 4. Distribution and prevalence of variants of Staphylococcus aureus sequence types of clonal complex 151 isolated from 2008, and 2013–2015 from dairy herds in Pennsylvania.

Sequence Type profiles	Year	No. of herds	Sample b	Anti-microbial resistancec	Toxin gene profile	Leucocidin profile
151–1	2008	3	MM (3)	-	seg, sei	LukMF’-LukAB-lukED
	2013	2	MM (3)
	2014	1	BTM (2)
	2015	6	MM (16), BTM (4)
151–2	2008	2	MM (2)	VA	seg, sei	LukMF’-LukAB-lukED
151–3	2008	1	MM (1)	DA	seg, sei	LukMF’-LukAB-lukED
151–4	2008	1	MM (1)	-	seg, sei	LukAB-lukED
151–5	2008	1	MM (1)	-	seg, sei, sen	LukMF’-LukAB-lukED
151–6	2015	1	MM (1)	-	sed, seg, sei	LukMF’-LukAB-lukED
151–7	2015	1	MM (2)	DA, ERY	seg, sei	LukMF’-LukAB-lukED
151–8	2015	1	MM (1)	VA	-	LukMF’-LukAB-lukED
705–1	2008	1	MM (1)	-	sec, seg, sei, tsst-1, sel	LukMF’-LukAB-lukED
705–2	2014	1	MM (1)	PEN	sec, seg, sei, tsst-1, sel	LukMF’-LukAB-lukED
3272	2008	1	MM (1)	-	seg, sei	LukMF’-LukAB-lukED

^a Sequence Type profile: composite profile including ST, antimicrobial resistance, toxin genes and leucocidin genes (e.g., ST151-2; VA, seg, sei, lukMF’-lukAB-lukED).

^b Sample: MM; Mastitic milk, BTM; Bulk Tank Milk.

^c Antimicrobial: DA Clindamycin; ERY, Erythromycin; PEN, Penicillin; VA, Vancomycin.