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''Ascaris suum'' is a member of the Ascarididae family and is the major cause of [[ascariasis]] in pigs. Its life cycle, like all ascarids, is not typical of nematodes as the infectious stage is within the egg. Due to the migratory life cycle of the larval stages this parasite can be the cause of [[Pigmentation and Calcification - Pathology#Post-Hepatic (Obstructive) Icterus|post-hepatic jaundice]] and [[Respiratory Parasitic Infections - Pathology#Ascaris suum|pneumonia]]. The nematode may also be a reservoir of [[Respiratory Viral Infections - Pathology#Swine influenza|Swine influenza]].
====Indentification====
''Ascaris suum'' is a large roundworm of pigs, each worm can grow up to 40cm long.
=== '''''ASCARIS SUUM''''' ===
=== '''''ASCARIS SUUM''''' ===
==== Life-Cycle ====
==== Life-Cycle ====
As with most ascarid species the larvae of ''Ascaris suum'' have a migratory life cycle moving through several body organs before becoming mature adults in the small intestine of the pig.
'''Eggs'''
Eggs are shed in the feaces of the host and have a thick proteinacious coat that allows them to exist on pasture for extended periods of time, up to 4 years. The ability of eggs to survive on pasture for so long and being so
*The larvae undergo hepato-tracheal migration before establishing in the small intestine. The damage they cause in the liver is known as 'white-spot' or 'milk-spot'.
*The larvae undergo hepato-tracheal migration before establishing in the small intestine. The damage they cause in the liver is known as 'white-spot' or 'milk-spot'.