Eight indoor-reared cross-bred sheep with no prior exposure to Fasciola hepatica were infected by oral gavage with 200 metacercarial cysts of the triclabendazole (TCBZ)-susceptible Cullompton isolate of F. hepatica. Twelve weeks after infection, sheep were treated with 10 mg/kg triclabendazole. Two sheep were euthanised per time period; at 48 h, 72 h and 96 h post-treatment (pt). Two untreated control sheep were euthanised at 96 h pt. Flukes were recovered from the liver and, if present, from the gall bladder of the sheep. They were processed for whole mount analysis, histology and transmission electron microscopy of the female reproductive system; specifically, the uterus, vitelline follicles. Mehlis' gland and ovary.
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