Experimental induction of necrotic enteritis with or without predisposing factors using netB positive Clostridium perfringens strains

Table 1 Frequency of NE lesions in chicks challenged with various C. perfringens strains and other predisposing factors

Trial	Group	Dietary factor^d	NE lesion score							NE case^e	NE incidence (%)
Trial	Group	Dietary factor^d	0	1	2	3	4	Sub total	Mean	NE case^e	NE incidence (%)
1	CP(FJ6)(C8-1)^a	−	6	6	4	3	5	24	1.79*	12	50
	E.n(G)^b	−	15	0	4	2	3	24	1.08*	09	41.7
	CTL^c	−	20	3	0	0	0	23^f	0.13	0	0
2	CP(FJ6)(C8-1)	+	2	6	6	5	5	24	2.17*	16	66.7
	E.n(G)	+	9	4	7	1	2	23^f	1.22*	10	43.5
	CP(FJ6) (C8-1) + E.n(G)	+	2	5	6	9	2	24	2.21*	17	70.8
	CTL	+	19	5	0	0	0	24	0.21	0	0

^aCP(FJ6) (C8-1): Clostridium perfringens type G strain (FJ6)(C8-1)
^bE.n(G): Eimeria necatrix Guangdong strain
^cCTL: control group
^dDietary factor: maize-based diet containing 60% fishmeal (1:1)
^eNE case is defined by lesion score reaching 2 or above
^f01 chicks died as early mortality in the group CTL and Eimeria, dissimilar letters indicate a significant difference compared with CTL group at 95% confidence level (independent t-test)
*Means highly significant (P < 0.01)

ISSN: 1757-4749