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| + | #REDIRECT[[:Category:Crustacea]] |
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| − | {{toplink
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| − | |backcolour =
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| − | |linkpage =Parasites
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| − | |linktext =PARASITES
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| − | |pagetype=Bugs
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| − | <br>
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| − | ==Introduction==
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| − | The crustacea are a latge group of arthropods but are ususally treated as a subphylum. The majority of crustaceans are aquatic but some have adapted to terrestrial life.
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| − | There are only two species of parasitic crustacea of veterinary importance, the tongue worm ''Linguatula serrata'' and sealice ''Lepeophtheirus and Caligus'' spp.
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| − | ==''Linguatula serrata''==
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| − | [[Image:Linguatula taenioides.jpg|right|thumb|150px|Copyright Cooper Curtice (Washington, Government Printing Office, 1890) Wikimedia Commons]] | |
| − | *Also known as the 'tongue worm'
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| − | '''Recognition'''
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| − | *Tongue-like appearance
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| − | **Expanded anteriorly
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| − | *Adults are over 10cm in length
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| − | **Females measure betwen 30-130mm in length
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| − | **Males measure up to 20mm in length
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| − | *Transversely striated
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| − | '''Life Cycle'''
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| − | *6 month life cycle
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| − | *Adults inhabit the nasal passages of dogs and sometimes cats
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| − | *Eggs are expelled by coughing and sneezing or are passed out with the faeces
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| − | *Herbivorous intermediate hosts ingest the eggs
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| − | *Eggs hatch in the herbivore intestine
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| − | *Larvae migrate to the mesenteric lymph nodes and encyst to become infective nymphs
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| − | **Cysts measure 1mm in diameter
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| − | *When a dog eats infeced uncooked viscera the life cycle is completed
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| − | *Infective nymphs migrate from the viscera during chewing and crawl up into the nasal cavity via the soft palate
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| − | *Infective nymphs mature to adults in the nasal cavities and can survive for a year in the final host
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| − | '''Pathogenesis'''
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| − | *Causes [[Nasal Cavity Inflammatory - Pathology#Infectious causes of rhinitis|rhinitis]]
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| − | *Heavy infection leads to coughing, sneezing and nasal discharge
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| − | ==Sea Lice==
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| − | ==Links==
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| − | [[Respiratory Parasitic Infections - Pathology#Linguatula serrata|Pathology of ''Linguata serrata'' in the nasal passages]]
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