ThePigSite猪群健康
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The Direct Life Cycle
(491) This is depicted in Fig.11-3. The adult worm lays its eggs in the intestine and they are passed out in the faeces onto the ground. The eggs then develop through larval stages, but only the last stage can infect a pig and develop into an adult worm. Some larvae(ascarids and lungworm) enter the digestive tract and migrate through the liver to the lungs before they complete their cycle. 
