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US recommendations are that a cut-off value of
1000 eggs/g indicates the goats need treating
Goats can die with egg counts of only 2000 eggs/g
so be careful
Haemonchus is a very prolific egg layer with
about 6000 per day but Trichostrongylus only
produces about 600 per day and Nematodirus
many fewer than this
The immune response can reduce the ability of
individual worms to produce eggs so more eggs
per worm in young than old, especially with sheep