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acres a ewe Anthelmintic Treatment August autopsy Average Total Parasite bile ducts Broad tapeworm contortus copper sulfate Counts of Ewes cunic Dakota Experiment Station death loss demnation Di-phenthane-70 diarrhea drench Eggs per Gram ewes and lambs Ewes Lambs Ewes Experiment Station Bulletin fecal specimens ﬁrst ﬂock fringed tapeworms Grazing Levels Grazing Moderate Grazing Grazing Weekly Rotation Haemonchus Haemonchus contortus Heavy Grazing Weekly high level infective larvae internal parasites intestine Lambs Ewes Lambs lambs on range larvae lead arsen level in ewes liver condemnations Lot 1 Lot low level Observations on Parasitism Parasite Egg Counts parasite infestation parasite level Parasitism in Sheep pasture percent phenothiazine Range Field Station rotation group scouring in lambs scouring lambs season sheepmen South Dakota Experiment species Station Bulletin 447 stomach worm Strongyle summer range Table tion Total Parasite Egg treated lambs trends in parasite trials Trichostrongylus Weekly Rotation Lot winter