Table 3.
Effects of microencapsulated OA and EO on the growth performance of weaned piglets during the prechallenge period (0 to 7 d), postchallenge period (7 to 11 d), and whole period (0 to 11 d)
| ETEC F4-challenged1 | ||||||
|---|---|---|---|---|---|---|
| Items | SCC2 | CC | AGP | P(OA+EO) | SEM | P-value |
| Initial BW, kg | 8.55 | 8.46 | 8.49 | 8.48 | 0.25 | 0.99 |
| Prechallenge | ||||||
| BW, kg | 9.97 | 10.25 | 10.02 | 10.20 | 0.35 | 0.88 |
| ADG, g·d−1 | 202 | 257 | 219 | 243 | 29 | 0.48 |
| ADFI, g·d−1 | 298 | 362 | 317 | 360 | 29 | 0.66 |
| FCR, g·g−1 | 1.73 | 1.42 | 1.55 | 1.55 | 0.13 | 0.75 |
| Postchallenge3 | ||||||
| BW, kg | 11.75 | 11.07 | 10.69 | 11.7 | 0.55 | 0.57 |
| ADG, g·d−1 | 446* | 240 | 183 | 354 | 61 | 0.24 |
| ADFI, g·d−1 | 635 | 538 | 477 | 584 | 43 | 0.25 |
| Whole period | ||||||
| ADG, g·d−1 | 291 | 251 | 195 | 284 | 36 | 0.28 |
| ADFI, g·d−1 | 420 | 422 | 364 | 441 | 33 | 0.28 |
| FCR, g·g−1 | 1.50 | 1.82 | 2.08 | 1.62 | 0.24 | 0.19 |
1CC, control challenged pigs; AGP, CC + 55 mg/kg Aureomycin; P(OA+EO), CC + 2 g/kg of a selected formula of OA (fumaric, citric, malic, and sorbic acids) and EO (thymol, vanillin, and eugenol) microencapsulated in a matrix of triglycerides. ETEC F4 challenged groups were compared by PROC MIXED followed by the Tukey’s multiple comparison test.
2SCC, sham-challenged control; SCC vs. CC (unpaired t test), *0.05 < P < 0.10.
3The FCR during the postchallenge period was unable to be calculated become some pigs lost weight (negative ADG).