Table 3. Spa types and genetic characteristics of select S. aureus isolates recovered from US beefpacking workers (n = 37 carriers)a.
Ridom spa typec | Number (n = 37) | scn-negativeb (n = 5) | PVL-positive (n = 4) | MRSA (n = 5) |
---|---|---|---|---|
t002 | 2 (5.4) | 0 | 0 | 1 (20) |
t008 | 2 (5.4) | 0 | 2 (50) | 2 (40) |
t024 | 2 (5.4) | 0 | 2 (50) | 2 (40) |
t338 | 1 (2.7) | 1 (20) | 0 | 0 |
t748 | 1 (2.7) | 1 (20) | 0 | 0 |
t1248 | 4 (10.8) | 0 | 0 | 0 |
t1476 | 1 (2.7) | 1 (20) | 0 | 0 |
t2379 | 1 (2.7) | 1 (20) | 0 | 0 |
a Five MSSA isolates were non-typeable, including one scn-negative isolate.
b scn negative defined as presumptive livestock-associated S. aureus. One scn-negative isolate was non-typeable.
c The following 15 spa types were recovered from one worker each (n = 1; 2.7%), were all scn-positive, PVL negative and MSSA: t021, t065, t078, t189, t276, t304, t458, t571, t688, t701, t992, t1250, t3182, t4298, t4976, t6150.