TABLE 6.

Recovery of viable bacteria of C. jejuni 11168H, ΔCj1321 mutant, ΔCj1322 mutant, ΔCj1323 mutant, and ΔCj1325 mutant strains and corresponding complemented strains from the gastrointestinal tracts of chickens^a

Mutation	Site in gastrointestinal tract	Log no. of CFU of:
		11168H	Deletion mutant	Complemented strain
ΔCj1321	Crop	2.39 ± 0.75	2.30 ± 0.73	2.37 ± 0.48
	Gizzard	2.35 ± 0.40	2.31 ± 0.83	2.73 ± 0.41
	Jejunum	2.46 ± 0.63	2.40 ± 0.62	2.62 ± 0.30
	Ileum	3.39 ± 0.41	3.35 ± 0.18	3.64 ± 0.67
	Cecum	7.42 ± 0.51	7.51 ± 0.52	7.70 ± 0.91
	Cecal tonsils	6.53 ± 0.62	6.60 ± 0.91	6.47 ± 0.84
ΔCj1322	Crop	2.39 ± 0.75	2.28 ± 0.88	2.46 ± 0.72
	Gizzard	2.35 ± 0.40	2.33 ± 0.13	2.40 ± 0.45
	Jejunum	2.46 ± 0.63	2.32 ± 0.85	2.43 ± 0.20
	Ileum	3.39 ± 0.41	3.30 ± 0.65	3.50 ± 0.97
	Cecum	7.42 ± 0.51	7.55 ± 0.77	7.48 ± 0.81
	Cecal tonsils	6.53 ± 0.62	6.46 ± 0.51	6.40 ± 0.63
ΔCj1323	Crop	2.39 ± 0.75	2.34 ± 0.58	2.29 ± 0.13
	Gizzard	2.35 ± 0.40	2.40 ± 0.17	2.30 ± 0.74
	Jejunum	2.46 ± 0.63	2.41 ± 0.22	2.44 ± 0.24
	Ileum	3.39 ± 0.41	3.30 ± 0.76	3.31 ± 0.15
	Cecum	7.42 ± 0.51	7.37 ± 0.59	7.30 ± 0.66
	Cecal tonsils	6.53 ± 0.62	6.49 ± 0.88	6.67 ± 0.75
ΔCj1325	Crop	2.39 ± 0.75	2.48 ± 0.25	2.65 ± 0.90
	Gizzard	2.35 ± 0.40	2.53 ± 0.29	2.38 ± 0.60
	Jejunum	2.46 ± 0.63	2.60 ± 0.89	2.35 ± 0.78
	Ileum	3.39 ± 0.41	3.58 ± 0.80	3.43 ± 0.72
	Cecum	7.42 ± 0.51	7.49 ± 0.28	7.56 ± 0.92
	Cecal tonsils	6.53 ± 0.62	6.50 ± 0.68	6.61 ± 0.36

^aSamples were recovered 6 weeks postinoculation (10 birds per strain). Log values presented are the geometric mean CFU per gram ± the standard errors of the means.