Table 2.
Strain characteristics of S. aureus isolates according to their FTIR biotype.
| FTIR biotype | QM/ BTM/ Dairy (n)a | spa typeb | ST type (CC)b | CP type | Enterotoxin gene profileb | MRSA | |
|---|---|---|---|---|---|---|---|
| A | 1 | QM1 (2) | t524 | 71 (97) | NT | neg | neg |
| 2 | QM8 (1)/ BTM8 (1)/ Dairy_B (1) | t524 | 71 (97) | NT | neg | neg | |
| 3 | QM14 (4)/ Dairy_R1 (1); Dairy_R7 (1); Dairy_R14 (5) | t044 | 97 (97) | NT | neg | neg | |
| 4 | BTM 8 (1); BTM14 (4)/ Dairy_R1 (1) | t044 | 97 (97) | NT | neg | neg | |
| 5 | QM6 (3)/ BTM6 (3); BTM18 (6)/ Dairy_BB (1); Dairy_R7 (1) | t044 | 97 (97) | NT | neg | neg | |
| BTM6 (2); BTM18 (1) | t044 | 97 (97) | CP5 | neg | neg | ||
| 6 | QM15 (2) | t337 | n.d. | CP5 | seg, sei | neg | |
| 7 | BTM4 (1) | t056 | 101 (Sing.) | NT | neg | neg | |
| B | 1 | QM3 (39)/ BTM3 (10)/ Dairy_C (8); Dairy_W (1); Dairy_BB (11); Dairy_B (1); Dairy_R1 (9); Dairy_R7 (11); Dairy_R14 (4) | t2953 | 8 (8) | NT | sea, sed, sej | neg |
| 2 | Dairy_R1 (1) | t084 | 15 (15) | NT | neg | neg | |
| 3 | QM13 (14)/ BTM13 (10)/ Dairy_C (2); Dairy_BB (1); Dairy_R1 (3); Dairy_R14 (4) | t2953 | 8 (8) | NT | sea, sed, sej | neg | |
| 4 | QM13 (3)/ BTM13 (2) | t2953 | 8 (8) | NT | sea, sed, sej | neg | |
| BTM6 (2); BTM12 (1) | t2953 | 8 (8) | NT | neg | neg | ||
| QM14 (1) | t2953 | 8 (8) | NT | neg | neg | ||
| C | 1 | QM7 (1) | n.d. | n.d. | CP8 | seg, sei | neg |
| 2 | QM15 (1); QM17 (1) | t529 | 504 (705) | CP8 | seg, sei | neg | |
| 3 | BTM12 (1) | t529 | 504 (705) | CP8 | seg, sei | neg | |
| BTM15 (1) | t529 | 504 (705) | CP8 | sea, sed, sej | neg | ||
| 4 | BTM16 (1) | n.d. | n.d. | CP8 | neg | neg | |
a
Number in brackets indicate number of isolates (n); QM (quarter milk) and BTM (bulk tank milk) numbers are referring to the farm number; Dairy_X refer to the respective cheese production steps (X) at the dairy plant: C (curd), W (whey), BB (before brine), B (brine) and R1, 7, 14 (ripening day 1, 7, 14);
b
Determined for a subset of strains (for details see Supplementary Table S1).