Table 3. Distribution and prevalence of variants Staphylococcus aureus sequence types of clonal complex 97 of isolated from 2008, and 2013–2015 from dairy herds in Pennsylvania.
| Sequence Type profilea | Year | No. of herds | Sample b | Anti-microbial resistancec | Toxin gene profile | Leucocidin profile |
|---|---|---|---|---|---|---|
| 97 | 2008 | 1 | MM (1) | PEN | sec, sed, sej, tsst-1, sel, ser | lukMF’-lukAB-lukED |
| 352–1 | 2008 | 5 | MM (5), BTM (1) | - | - | lukMF’-lukAB-lukED |
| 2013 | 4 | MM (5), BTM (1) | ||||
| 2014 | 3 | MM (1), BTM (2) | ||||
| 2015 | 11 | MM (4), BTM (7) | ||||
| 352–2 | 2008, 2015 | 2 | MM (2) | - | seg, sei | lukMF’-lukAB-lukED |
| 352–3 | 2008 | 1 | MM (1) | FOX | - | lukMF’-lukAB-lukED |
| 352–4 | 2008 | 1 | MM (1) | - | tsst-1 | lukMF’-lukAB-lukED |
| 352–5 | 2008 | 1 | MM (1) | - | sec, tsst-1, sel | lukMF’-lukAB-lukED |
| 352–6 | 2008 | 1 | MM (1) | TET | seq | lukMF’-lukAB-lukED |
| 352–7 | 2014, 2015 | 3 | MM (3), BTM (1) | TET | - | lukMF’-lukAB-lukED |
| 352–8 | 2014 | 2 | BTM | VA | - | lukMF’-lukAB-lukED |
| 352–9 | 2014, 2015 | 2 | BTM (2) | - | - | lukM-lukED |
| 352–10 | 2015 | 1 | BTM | PEN | - | lukMF’-lukAB-lukED |
| 352–11 | 2015 | 1 | BTM | PEN | seg, sei | lukMF’-lukAB-lukED |
| 352–12 | 2015 | 1 | BTM | - | sed | lukMF’-lukAB-lukED |
| 352–13 | 2015 | 1 | BTM | - | - | lukAB-lukED |
| 352–14 | 2015 | 1 | MM (1) | - | - | - |
| 2187–1 | 2008 | 2 | MM (2) | - | - | LukAB-LukED |
| 2013 | 3 | MM (10) | ||||
| 2014 | 2 | BTM (4) | ||||
| 2015 | 4 | MM (3), BTM (1) | ||||
| 2187–2 | 2008 | 1 | MM (1) | VA | - | - |
| 2187–3 | 2008 | 1 | MM (1) | - | tsst-1 | LukAB-lukED |
| 2187–4 | 2008 | 1 | MM (1) | - | seg, sei | LukAB-lukED |
| 2187–5 | 2013 | 1 | MM (1) | VA | - | LukAB-lukED |
| 2187–6 | 2014 | 1 | MM (1) | - | - | LukED |
| 2187–7 | 2014 | 1 | BTM | FOX | - | LukAB-lukED |
| 2187–8 | 2014 | 1 | BTM | VA | - | LukAB |
| 3028–1 | 2008, 2015 | 3 | MM (3) | - | - | LukMF’-LukAB-lukED |
| 3028–2 | 2008 | 76 | MM (1) | - | seg, sei | LukAB-lukED |
| 3028–3 | 2008 | 11 | MM (1) | - | - | LukAB-lukED |
| 2013 | 4 | MM (5) | ||||
| 2014 | 5 | MM (5), BTM(8) | ||||
| 2015 | 6 | MM (1) BTM (3) | ||||
| 3028–4 | 2014 | 2 | BTM (3) | VA | - | LukAB-lukED |
| 693 | 2014 | 1 | MM (9) | LukAB-lukED | ||
| 3273 | 2014 | 1 | BTM | LukMF’-LukAB-lukED | ||
| 3274 | 2014 | 1 | BTM | PEN | LukAB-lukED |
a Sequence Type Profile: composite profile including ST, antimicrobial resistance, toxin genes and Leucocidin genes (e.g., ST351-11; PEN, seg, sei, lukMF’-lukAB-lukED).
b Sample: MM; Mastitic milk, BTM; Bulk Tank Milk.
c Antimicrobial: FOX, Cefoxitin; DA Clindamycin; ERY, Erythromycin; PEN, Penicillin; TET, Tetracycline; VA, Vancomycin.