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Table I.

Experimental protocol for the T. circumcincta challenge infection experiment.

Animals Status Treatments (relative to day of challenge)
Tricklea infection Levamisoleb
Number killed
Unchallenged
Challengedc
Day −7 0 5 10 22
Lambs Previously infected + + 6d 5d 5d
Naïve + 4d 6d 5d 4d
a

2 000 T. circumcincta L3 3 × per week for 8 weeks.

b

Levamisole 7.5 mg/kg per os.

c

1 × 50 000 T. circumcincta L3.

d

Scottish Blackface × Leicester.