Table 3.

Exp. 3: Protection against natural challenge (22 months of exposure) induced by vaccination of cattle with irradiated O. ochengi third-stage larvae

	Control	Vaccinated	P
Frequency of nodule-positive animals	13/13	8/9	0.409
Frequency of Mf-positive animals	13/13	3/9	0.001
Median no. of nodules (range)	14.0 (1–45)	5.0 (0–15)	0.053
Median no. of male worms (range)	13.0 (1–34)	7.0 (0–19)	0.168
Median total worm recovery (range)	27.0 (2–79)	13.0 (0–33)	0.074
Median no. of gravid females (range)	3.0 (1–9)	0.0 (0–3)	0.009
Median Mf density per 100 mg of skin (range)	17.5 (0.0–317.2)*	0.0 (0.0–99.4)	0.042

*One animal was negative at this time point but had been positive on prior occasions.