TABLE 1.

Shedding percentages and serum IgG levels in broiler chickens following challenge with C. jejuni strain S3B (experiment I) or 21190 (experiment II)

Expt and group	Age (day)	Serum MAB level (±SD) at challenge	% Shedding on day after challengea:										Serum IgG levelb after challenge on dayc:
			1	3	5	7	9	11	13	15	21	28	−1	7	15	21	28
I
1	3	1.565 ± 0.088	0*	0*	0*	100*	100*	100*	100*	100*	100*	100*	1.565*	0.546*	0.134*	0.112*	0.474*
2	21	0.087 ± 0.012	0*	90†	100†	100*	100*	100*	100*	100*	60*	10†	0.087†	0.336†	0.871†	0.838†	0.722*
II
1	3	1.846 ± 0.152	0*	0*	0*	0*	0*	0*	0*	0*	0*	0*	1.846*	NTd	NT	NT	NT
2	21	0.113 ± 0.033	0*	30*	40*	70†	100†	70†	30*	0*	0*	0*	0.113†	NT	0.266*	0.316*	0.730*

^aThe numbers in the same column of each experiment with different superscript symbols differ significantly (Fisher's exact test).

^bMean ELISA OD for 7 to 10 serum samples.

^cMeans in the same column of each experiment with different superscript symbols differ significantly (one-way analysis of variance).

^dNT, not tested.