Table 5

Strains	Serum heat treatment	Survival ratio
E. coli DH5α	-	0^a
	+	8.6^a
P. multocida
P-1059	-	165 ± 57
	+	196 ± 64
∆hexB	-	0.24 ± 0.07^a
	+	126 ± 22^a
P-1059C	-	97 ± 19^a
	+	142 ± 26^a

^a Significantly different at P<0.01 when compared to serum and heated serum treatment

Table 5: Resistance of E. coli DH5 and P. multocida strains to chicken serum.