Difference between revisions of "Crustacea"

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==Introduction==
 
 
 
==''Linguatula serrata''==
 
 
 
*Also known as the 'tongue worm'
 
 
 
'''Recognition'''
 
*Tongue-like appearance
 
**Expanded anteriorly
 
 
 
*Adults are over 10cm in length
 
**Females measure betwen 30-130mm in length
 
**Males measure up to 20mm in length
 
 
 
*Transversely striated
 
 
 
'''Life Cycle'''
 
*6 month life cycle
 
 
 
*Adults inhabit the nasal passages of dogs and sometimes cats
 
 
 
*Eggs are expelled by coughing and sneezing or are passed out with the faeces
 
 
 
*Herbivorous intermediate hosts ingest the eggs
 
 
 
*Eggs hatch in the herbivore intestine
 
 
 
*Larvae migrate to the mesenteric lymph nodes and encyst to become infective nymphs
 
**Cysts measure 1mm in diameter
 
 
 
*When a dog eats infeced uncooked viscera the life cycle is completed
 
 
 
*Infective nymphs migrate from the viscera during chewing and crawl up into the nasal cavity via the soft palate
 
 
 
*Infective nymphs mature to adults in the nasal cavities and can survive for a year in the final host
 
 
 
'''Pathogenesis'''
 
*Causes [[Nasal Cavity Inflammatory - Pathology#Infectious causes of rhinitis|rhinitis]]
 
 
 
*Heavy infection leads to coughing, sneezing and nasal discharge
 
 
 
==Sea Lice==
 
 
 
==Links==
 
 
 
[[Respiratory Parasitic Infections - Pathology#Linguatula serrata|Pathology of ''Linguata serrata'' in the nasal passages]]
 

Latest revision as of 22:20, 6 April 2010

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