Bunostomum trigonocephalum is hook worms of

Bunostomum trigonocephalum is hook worm of Sheep and goats.
Bunostomum is a genus of nematodes of the small intestine of ruminants and camelids. The worms are stout and measure 1 - 3 centimetres (0.4 - 1.2 in) in length.
The life cycle is direct, with a prepatent period of 30 - 56 days. Eggs hatch on the ground and develop into infective larvae in several weeks. Larvae penetrate through the skin or are ingested and then migrate to the respiratory system, are coughed up and swallowed and finally reach the small intestine.