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Gongylonema verrucosum



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Gongylonema verrucosum
Gullet worm

General Description:
Gongylonema pulchrum adult males are up to 62 mm long and females are up to 145 mm long. Gongylonema verrucosum males are 32 to 41 mm long and females, 70 to 95 mm long.

Life Cycle:

Indirect nematode life cycle with coprophagous (manure-eating) beetles as intermediate hosts. Eggs in feces hatch after being eaten by the beetles. Larvae develop to the infective stage in these insects. Sheep ingest the beetles while grazing, and larvae are released in the abomasum and migrate forward to the oesophagus where they develop into adults. Gongylonema verrucosum larvae become adults in the rumen without migrating to the oesophagus.


rumen wall.
Geographical Distribution:
India, North America, South Africa, Cyprus, Taiwan, and Australia.

Damage is mild or non-existent, but affected organs that could otherwise be used for sausage casings and tripe are condemned at slaughter.

Effect on Host:
A mild inflammation of the oesophagus and rumen.

Diagnostic Information:

Adults may sometimes be seen in the oesophagus of live animals. Worms lie in zigzag fashion on the outer oesophageal wall.

Use of dry feedlots minimizes the beetle population. Treatment of infected sheep is not recommended.


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