Changes

[[Image:Trichostrongylus.jpg|thumb|right|150px|''Trichostrongylus'' - Joaquim Castellà Veterinary Parasitology Universitat Autònoma de Barcelona]]

[[Image:Trichostrongylus.jpg|thumb|right|150px|''Trichostrongylus'' - Joaquim Castellà Veterinary Parasitology Universitat Autònoma de Barcelona]]

The life cycle of a ''trichostrongyloidea'' are direct, and infection is through ingestion of L3.  They are a bursate group, with ''Dictyocaulus'' forming the only exception.  Important genera include ''Ostertagia'', ''Haemonchus'' and ''Trichostrongylus.''

The life cycle of a ''trichostrongyloidea'' are direct, and infection is through ingestion of L3.  They are a bursate group, with ''[[Dictyocaulus]]'' forming the only exception.  Important genera include ''[[Ostertagia]]'', ''[[Haemonchus]]'' and ''Trichostrongylus.''

== General Life-Cycle ==

== General Life-Cycle ==