Table 3.

Effects of strain and temperature on serum concentrations of glucose, creatine kinase, α1-acid glycoprotein, ceruloplasmin, and ovotransferrin in broiler chickens at 35 days of age

Variable	Strain		SEM	Temp1)		SEM	p-value
	Cobb 500	Ross 308		Normal	Heat stress		Strain	Temp	Strain×Temp
Glucose (mmol/L)	21.96	21.18	3.18	20.13b	23.00a	2.85	0.348	0.001	0.686
Creatine kinase (mmol/L)	30.17	29.58	4.92	28.75	31.00	4.79	0.666	0.101	0.035
AGP (mg/mL)	0.571	0.546	0.19	0.460b	0.656a	0.17	0.614	<0.001	0.852
CPN (mg/mL)	4.493	4.413	0.89	4.001b	4.906a	0.76	0.719	<0.001	0.353
OVT (mg/mL)	1.456	1.508	0.18	1.374b	1.589a	0.17	0.309	<0.001	0.861

SEM, standard error of the mean for main effects (n = 24); Temp, temperature; AGP, α1-acid glycoprotein; CPN, ceruloplasmin; OVT, ovotransferrin.

¹⁾The heat stressed birds were exposed to 34°C for 6 h daily.

^a,bMeans within a row-subgroup with no common superscripts are significantly different at p<0.05.