Table 3.
Salmonella serovars isolated from porcine LN samples
| Serovar | No. isolated | % prevalence |
|---|---|---|
| London | 5 | 21.7 |
| Anatum | 3 | 13.0 |
| Worthington | 2 | 8.7 |
| 3,10:b:e,n,x or Benfica | 2 | 8.7 |
| 3,10:l,z13:1,6 (No predicted serotype) | 2 | 8.7 |
| Eko | 1 | 4.4 |
| Infantis | 1 | 4.4 |
| Johannesburg | 1 | 4.4 |
| Ohio | 1 | 4.4 |
| Regent | 1 | 4.4 |
| Uganda | 1 | 4.4 |
| 1,3,19:f,g:1,6 (No predicted serotype) | 1 | 4.4 |
| 1,3,19:g,s,t:1,6 | 1 | 4.4 |
| 4:f,g:1,6 | 1 | 4.4 |
A total of 21 (n = 8 northern market hog, n = 4 northern sow, n = 4 southern market hog, and n = 5 southern sow) commercial harvest and processing facilities participated in the study; the remaining 12 facilities either declined or were no longer in operation. At each commercial facility, market hogs or sows were harvested and left and right superficial inguinal LNs (n = 1,014 LNs) were removed. Within animal, left and right LNs of each type were pooled (n = 507 total samples). Of the confirmed Salmonella-positive samples (n = 68), establishment consent for whole genome sequencing was provided for 23.