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Endoparasites - Trichuris

Trichuris discolor, Trichuris globulosa: Whipworm

General Description: Long roundworms; the front or anterior part is long and thin while the posterior is much thicker, giving the appearance of a whip. Posterior of male is curled.

Life Cycle: Direct roundworm life cycle; infective larvae develop within eggs after at least 3 weeks on pasture. These are resistant to cold temperatures and drying, so may remain infective for several years. Animals are infected by ingesting embryonated eggs. Adults develop in 1 to 3 months.

Location: Cecum.

Geographical Distribution: Widespread.

Significance: Whipworms are widespread, but effects of infection have not been determined.

Effect on Host: None has been attributed to natural Trichuris infection in cattle.

Diagnostic Information: Barrel-shaped eggs are seen in faeces.

Control: Treatment of cattle with an anthelmintic is most effective. Pasture management is also useful.

Trichuris– adults   Typical bi polar egg

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