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==''Linguatula serrata''==
 
==''Linguatula serrata''==
*''Linguatula serrata'' in [[Respiratory Parasitic Infections - Pathology#Linguatula serrata|nasal passages]] of dogs and sometimes cats, cause of [[Nasal Cavity Inflammatory - Pathology#Infectious causes of rhinitis|rhinitis?]]
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*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
    
==Sea Lice==
 
==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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