Volume 9, Number 4—April 2003
Dispatch
Antimicrobial Growth Promoters and Salmonella spp., Campylobacter spp. in Poultry and Swine, Denmark
Mary C. Evans*
and Henrik C. Wegener*
and Henrik C. Wegener*Table 1
Description of time intervals used for data analysis, by species and pathogena
| Species | Pathogen | Period 1 (P1) | Period 2 (P2) |
|---|---|---|---|
| Broilers |
Salmonella (antemortem ) |
Jan 1995–Dec 1997 |
Jan 1999–Dec 2001 |
| Salmonella (postmortem) |
Jan 1996–Oct 1997 |
Jan 1999–Oct 2000 |
|
| Campylobacter |
Jan 1996–Dec 1997 |
Jan 1999–Dec 2000 |
|
| Swine |
Salmonella |
Jan 1996–Dec 1997 |
Jan 2000–Dec 2001 |
| Salmonella (pork) | Jan 1997–Dec 1997 | Jan 2000–Dec 2000 |
aPeriod 1 and 2 refer to the time periods before (P1) and after (P2) the withdrawal of antimicrobial growth promoters.
