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===Introduction===

==Introduction==

''N. battus'' is most prominent within the UK, but is also present to a lesser extend in Norway, Sweden, the Netherlands, and Canada.  In heavy infections this parasite can be severe, and if left untreated can lead to the death of the carrying host.  It is also capable of causing parasitic [[Enteritis, Parasitic|catarrhal enteritis]].

''N. battus'' is most prominent within the UK, but is also present to a lesser extend in Norway, Sweden, the Netherlands, and Canada.  In heavy infections this parasite can be severe, and if left untreated can lead to the death of the carrying host.  It is also capable of causing parasitic [[Enteritis, Parasitic|catarrhal enteritis]].

It is a nematode , and is part of the ''Trichostrongyloidea'' superfamily.

It is a nematode , and is part of the ''Trichostrongyloidea'' superfamily.

===Hosts===

==Hosts==

Mainly sheep and goats, but infected cattle are occasionally found.

Mainly sheep and goats, but infected cattle are occasionally found.

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

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

===Identification===

==Identification==

A mature adult is around 2cm longer.  The female has a prominent spine projecting from the end.  The male has a very long slender tail with spicules extended past the bursa.

A mature adult is around 2cm longer.  The female has a prominent spine projecting from the end.  The male has a very long slender tail with spicules extended past the bursa.

''N. battus'' eggs are larger than the typical egg of a ''Trichostrongyle'', and have a brownish colouration, with parallel sides.

''N. battus'' eggs are larger than the typical egg of a ''Trichostrongyle'', and have a brownish colouration, with parallel sides.

===Life Cycle===

==Life Cycle==

The lifecycle of ''N. battus'' is different from to the common ''Trichostrongyle'' lifecycle.

The lifecycle of ''N. battus'' is different from to the common ''Trichostrongyle'' lifecycle.