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| Also known as:
| Also known as:
| '''Oesophagostomum viginimembrum
| '''Oesophagostomum viginimembrum
<br>
'''Large bowel worm
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|-
|}
|}
==Hosts==
Sheep, deer, goats, and camels.
==Identification==
The females are larger than the males at around 2mm in length. The male has a well developed bursa.
==Life Cycle==
The eggs are past out into the environment in faeces. They hatch quickly, forming L1. L1 then transforms in L2, which moults into L3; which is the infective stage. The host then becomes infected by ingesting the infective larvae when grazing on the pasture. The L3 mature into L4 within the intestine, and then pass onto the colon to complete development.
The prepatent period is around 49 days.