Table 1.
Treatment groups with additives applied in this study.
| Treatments1 | Additives | Inclusion level; starter (d 0 to 9), grower (d 9 to 21) and finisher (d 21 to 35) phases, ppm | Necrotic enteritis challenge2 |
|---|---|---|---|
| UC | – | – | Unchallenged |
| CC | – | – | Challenged |
| PE | Plant extract | 100 | Challenged |
| AM | Antimicrobial | 50 of narasin and nicarbasin | Challenged |
| FAP | AM full dose + PE | 50 + 100 | Challenged |
| HAP | AM half dose + PE | 25 + 100 | Challenged |
1
UC, unchallenged control; CC, challenged control; PE, plant extract; AM, antimicrobial (narasin and nicarbasin; 50 ppm each active compound); FAP, full dose of AM plus PE; HAP, half dose of AM plus PE.
2
Challenged birds were orally gavaged with Eimeria spp. on d 9 and Clostridium perfringens on d 14.