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 2
Comparison of the average prevalence of Salmonella and Campylobacter in broiler flocks, chicken meat, swine herds, and pork products before and after withdrawal of antimicrobials for use as growth promoters
| Period 1a
mean (range) |
Period 1 standard deviation |
Period 2b
mean (range) |
Period 2 standard deviation |
p value |
|
|---|---|---|---|---|---|
| Salmonella | |||||
| Broilers (antemortem) |
14.4 (3.7–33.6) |
8.3902 |
2.4 (0.2–5.8) |
1.3215 |
<0.0001 |
| Broilers (postmortem) |
17.0 (8.1–38.8) |
7.9125 |
4.9 (0.7–24.9) |
5.0493 |
<0.0001 |
| Swine |
5.0 (4.2–6.2) |
0.5904 |
3.3 (2.5–4.4) |
0.5347 |
<0.0001 |
| Pork |
1.1 (0.5–1.8) |
0.3895 |
0.8 (0.4–1.5) |
0.2839 |
0.0290 |
| Campylobacter |
|||||
| Broilers (antemortem) | 35.3 (11.4–64.8) | 16.6290 | 40.8 (18.0–77.0) | 16.1185 | 0.2470 |
aBefore withdrawal of antimicrobial growth promoters.
bAfter withdrawal of antimicrobial growth promoters.
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