Difference between revisions of "Linguatula serrata"

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[[Image:Linguatula taenioides.jpg|right|thumb|150px|Copyright Cooper Curtice (Washington, Government Printing Office, 1890) Wikimedia Commons]]
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{{OpenPagesTop}}
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*Also known as the tongue worm
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{{Taxobox
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|name              =''Linguatula serrata
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|kingdom            =
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|phylum            =
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|class              = Pentastomida
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|sub-class          =
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|order              =
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|super-family      =
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|family            = Linguatulidae
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|sub-family        =
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|genus              =
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|species            =
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}}
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Also known as: '''''Tongue worm
  
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*A highly specialised [[Arthropods|arthropod]]
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==Hosts==
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Any carnivorous vertebrate : Mammals, birds or tropical reptiles e.g. snakes.
  
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==Identification==
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The adults have apparent transverse striations.  The males are around 20mm in length, whereas the females are larger at between 80-130mm in length.
  
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'''Recognition'''
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==Life Cycle==
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*[[Oral Cavity - Tongue - Anatomy & Physiology|Tongue]]-like appearance
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This is an indirect life cycle. Eggs are released into the environment through coughing and sneezing. Eggs are ingested by an intermediate host, most commonly the sheep and cattle.  The larvae develop and migrate into the liver and the lungs. The larvae then enter the nymphal stage. The final host is infected via ingestion of inadequately cooked meat. The nymphs then migrate to the nasal cavity and sinuses. Infective nymphs mature to adults, and can survive for up to one year.
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**Expanded anteriorly
 
  
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*Adults are over 10cm in length
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The complete life cycle takes around 6 months.
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**Females measure between 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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{{Learning
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|flashcards = [[Crustacea_Flashcards_-_WikiBugs|Crustacea Flashcards]]
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|literature search = [http://www.cabdirect.org/search.html?rowId=1&options1=AND&q1=%22Linguatula+serrata%22&occuring1=title&rowId=2&options2=AND&q2=&occuring2=freetext&rowId=3&options3=AND&q3=&occuring3=freetext&x=41&y=14&publishedstart=yyyy&publishedend=yyyy&calendarInput=yyyy-mm-dd&la=any&it=any&show=all ''Linguatula serrata'' publications]
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}}
  
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==References==
  
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'''Life cycle'''
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Taylor, M.A, Coop, R.L., Wall,R.L. (2007) '''Veterinary Parasitology''' ''Blackwell Publishing''  
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*Life cycle takes '''6 months'''
 
  
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*Adults inhabit the [[Nasal cavity - Anatomy & Physiology|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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{{OpenPages}}
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[[Category:Crustacea]]
  
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*Herbivorous intermediate hosts ingest the eggs
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[[Category:Expert_Review]]
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[[Category:Respiratory Parasitic Infections]][[Category:Dog Parasites]]
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*Eggs hatch in the herbivore [[Small Intestine - Anatomy & Physiology|intestine]]
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[[Category:Cat Parasites]]
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*Larvae migrate to the [[Peritoneal cavity - Anatomy & Physiology#Mesenteries|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 infected 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 - Anatomy & Physiology|nasal cavity]] via the [[Soft Palate - Anatomy & Physiology|soft palate]]
 
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*Infective nymphs mature to adults in the [[Nasal cavity - Anatomy & Physiology|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[[Category:Crustacea]]
 

Latest revision as of 20:29, 25 June 2015


Linguatula serrata
Class Pentastomida
Family Linguatulidae

Also known as: Tongue worm

Hosts

Any carnivorous vertebrate : Mammals, birds or tropical reptiles e.g. snakes.

Identification

The adults have apparent transverse striations. The males are around 20mm in length, whereas the females are larger at between 80-130mm in length.

Life Cycle

This is an indirect life cycle. Eggs are released into the environment through coughing and sneezing. Eggs are ingested by an intermediate host, most commonly the sheep and cattle. The larvae develop and migrate into the liver and the lungs. The larvae then enter the nymphal stage. The final host is infected via ingestion of inadequately cooked meat. The nymphs then migrate to the nasal cavity and sinuses. Infective nymphs mature to adults, and can survive for up to one year.

The complete life cycle takes around 6 months.


Linguatula serrata Learning Resources
FlashcardsFlashcards logo.png
Flashcards
Test your knowledge using flashcard type questions 		Crustacea Flashcards
CABICABI logo.jpg
Literature Search
Search for recent publications via CAB Abstract
(CABI log in required) 		Linguatula serrata publications


References

Taylor, M.A, Coop, R.L., Wall,R.L. (2007) Veterinary Parasitology Blackwell Publishing



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