TABLE 1.
Description of herds from which market swine were necropsied for S. enterica isolation
| Herd | Date of depopulation (mo/day/yr) | Herd size (approx no. of sows) | Transport distance (km)a | Holding time (h) | Housing conditions of market swine |
|---|---|---|---|---|---|
| 1 | 1/27/00 | 450 | 153 | 3.25 | Total confinement, fully slatted floors |
| 2 | 3/8/00 | 170 | 182 | 2.5 | Outside lots,b concrete or dirt floors |
| 3 | 3/21/00 | 30 | 132 | 2.5 | Outside lots,b concrete or dirt floors |
| 4 | 3/29/00 | 214 | 77 | 2 | Outside lots,b concrete or dirt floors |
| 5 | 4/4/00 | 125 | 201 | 3 | Total confinement, fully slatted floors |
| 6 | 4/12/00 | 168 | 270 | 1.5 | Partial confinement,c partially slatted floors |
| Mean | 193 | 169 | 2.5 |
a
Transport distances were estimated from postal codes.
b
Outside lots included open-faced buildings.
c
Partial confinement. All grow and finish pigs were housed indoors. Gestating sows were in outside lots.