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**Enteritis
**Enteritis
**>10,000 adult worms (examine male worms to identify species)
**>10,000 adult worms (examine male worms to identify species)
=== Control of Nematodirosis ===
'''Clean Pasture'''
*Ideal but requires no lambs having grazed that pasture the previous year
'''Contaminated Pasture'''
*Dose lambs two or three times at 3-weekly intervals in '''May''' or '''June'''
*Optimum timing may be predicted by a forecasting system based on soil temperatures during March
=== Alternate Grazing of Sheep and Cattle ===
Good worm control is possible by alternating the grazing of fields on an annual basis with each host due to the relative insusceptibility of cattle to sheep nematodes and vice versa
=== Tannin-Rich Forages ===
Condensed tannins, found in clover, lucerne, trefoil, etc. protect plants against microbial and parasitic attack and have recently been found to
#Protect dietary protein against rumen breakdown
#Posses some anthelmintic activity
To date, trials investigating the anthelmintic activity of tannin-rich forages have shown variable results between studies; faecal worm egg output was reduced in most studies and worm numbers in some. Clearly, further research is required, though such forages do offer potential as a long-term epidemiological tool and may reduce farmers' dependence on anthelmintics.
[[Category:Trichostrongyloidea]][[Category:Sheep Nematodes]]
[[Category:Trichostrongyloidea]][[Category:Sheep Nematodes]]