Table 1.

Mean blood hematocrit (Hct), hemoglobin (Hb), and mean corpuscular hemoglobin concentration (McHc) values at 8 woa in layer pullets before a R_lowMycoplasma gallisepticum (R_lowMG) challenge at 8 and 10 woa and that belonged to basal (control) and XPC-supplemented (XPC) dietary treatment groups.¹

Variable	Hct (% PCV)	Hb (g/dL)	McHc (g/dL)
Diet2
Control	29.2	9.44	32.3
XPC	29.3	9.48	32.3
Pooled SEM	0.25	0.08	0.01
Main effect P-value	0.7079	0.7079	0.6987
Challenge3
Unchallenged	29.3	9.47	32.3
RlowMG challenged	29.3	9.45	32.3
Pooled SEM	0.25	0.08	0.01
Main effect P-value	0.9146	0.9146	0.8565
Diet-Challenge4
Control and unchallenged	29.3	9.46	32.3
Control and RlowMG challenged	29.2	9.42	32.3
XPC and unchallenged	29.3	9.48	32.3
XPC and RlowMG challenged	29.4	9.49	32.3
Pooled SEM	0.35	0.12	0.01
Interaction P-value	0.8512	0.8512	0.8363

Abbreviation: woa, wk of age.

¹Challenge treatment designations were preassigned, as main and interaction effect means involving challenge were before challenge.

²Main effect means based on 4 birds in each of 16 units in each dietary treatment group across challenge treatment (64 total birds).

³Main effect means based on 4 birds in each of 16 units in each challenge treatment group across dietary treatment (64 total birds).

⁴Interaction effect means based on 4 birds in each of 8 replicate units in each diet-challenge treatment combination group (32 total birds).