Table 5.
Mean blood glucose and corticosterone concentrations at 8 woa in layer pullets before a RlowMycoplasma gallisepticum (RlowMG) challenge at 8 and 10 woa and that belonged to basal (control) and XPC-supplemented (XPC) dietary treatment groups.1
| Variable | Glucose (mg/dL) | Corticosterone (pg/mL) |
|---|---|---|
| Diet2 | ||
| Control | 242 | 4,799 |
| XPC | 244 | 5,192 |
| Pooled SEM | 1.9 | 710 |
| Main effect P-value | 0.4813 | 0.6984 |
| Challenge3 | ||
| Unchallenged | 239b | 4,571 |
| RlowMG challenged | 246a | 5,420 |
| Pooled SEM | 1.9 | 710 |
| Main effect P-value | 0.0129 | 0.4051 |
| Diet-Challenge4 | ||
| Control and unchallenged | 239 | 4,308 |
| Control and RlowMG challenged | 244 | 5,289 |
| XPC and unchallenged | 239 | 4,833 |
| XPC and RlowMG challenged | 248 | 5,551 |
| Pooled SEM | 2.7 | 1,005 |
| Interaction P-value | 0.4742 | 0.8970 |
a,bMeans in a column within type of variable and main effect or interaction treatment with no common superscript differ significantly (P ≤ 0.05).
Abbreviation: woa, wk of age.
Challenge treatment designations were preassigned, as main and interaction effect means involving challenge were before challenge.
Main effect means based on 4 birds in each of 16 units in each dietary treatment group across challenge treatment (64 total birds).
Main effect means based on 4 birds in each of 16 units in each challenge treatment group across dietary treatment (64 total birds).
Interaction effect means based on 4 birds in each of 8 replicate units in each diet-challenge treatment combination group (32 total birds).