Difference between revisions of "Linguatula serrata"

Revision as of 22:25, 6 April 2010

Copyright Cooper Curtice (Washington, Government Printing Office, 1890) Wikimedia Commons

Also known as the tongue worm

A highly specialised arthropod

Recognition

Tongue-like appearance
- Expanded anteriorly

Adults are over 10cm in length
- Females measure between 30-130mm in length
- Males measure up to 20mm in length

Transversely striated

Life cycle

Life cycle takes 6 months

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 infected 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 rhinitis

Heavy infection leads to coughing, sneezing and nasal discharge

@@ Line 1: / Line 1: @@
-{{OpenPagesTop}}
+<categorytree mode=pages style="float:right; clear:right; margin-left:1ex; border:1px solid gray; padding:0.7ex; background-color:white;">Parasites</categorytree>
-{{Taxobox
-|name               =''Linguatula serrata
-|kingdom            =
-|phylum             =
-|class              = Pentastomida
-|sub-class          =
-|order              =
-|super-family       =
-|family             = Linguatulidae
-|sub-family         =
-|genus              =
-|species            =
-}}
-Also known as: '''''Tongue worm
-==Hosts==
+[[Image:Linguatula taenioides.jpg|right|thumb|150px|Copyright Cooper Curtice (Washington, Government Printing Office, 1890) Wikimedia Commons]]
-Any carnivorous vertebrate : Mammals, birds or tropical reptiles e.g. snakes.
+*Also known as the tongue worm
-==Identification==
+*A highly specialised [[:Category:Arthropods|arthropod]]
-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.
+'''Recognition'''
+*[[Oral Cavity - Tongue - Anatomy & Physiology|Tongue]]-like appearance
+**Expanded anteriorly
-{{Learning
+*Adults are over 10cm in length
-|flashcards = [[Crustacea_Flashcards_-_WikiBugs|Crustacea Flashcards]]
+**Females measure between 30-130mm in length
-|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]
+**Males measure up to 20mm in length
-}}
-==References==
+*Transversely striated
-Taylor, M.A, Coop, R.L., Wall,R.L. (2007) '''Veterinary Parasitology''' ''Blackwell Publishing''
+'''Life cycle'''
+*Life cycle takes '''6 months'''
-{{OpenPages}}
+*Adults inhabit the [[Nasal cavity - Anatomy & Physiology|nasal passages]] of dogs and sometimes cats
-[[Category:Crustacea]]
-[[Category:Expert_Review]]
+*Eggs are expelled by coughing and sneezing or are passed out with the faeces
-[[Category:Respiratory Parasitic Infections]][[Category:Dog Parasites]]
-[[Category:Cat Parasites]]
+*Herbivorous intermediate hosts ingest the eggs
+*Eggs hatch in the herbivore [[Small Intestine - Anatomy & Physiology|intestine]]
+*Larvae migrate to the [[Peritoneal cavity - Anatomy & Physiology#Mesenteries|mesenteric lymph nodes]] and encyst to become infective nymphs
+**Cysts measure 1mm in diameter
+*When a dog eats infected uncooked viscera the life cycle is completed
+*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]]
+*Infective nymphs mature to adults in the [[Nasal cavity - Anatomy & Physiology|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[[Category:Crustacea]]

Difference between revisions of "Linguatula serrata"

Revision as of 22:25, 6 April 2010

Navigation menu

Search