Difference between revisions of "Dictyocaulus arnfieldi"

Latest revision as of 17:48, 4 June 2016

Dictyocaulus arnfieldi
Class	Nematoda
Super-family	Trichostrongyloidea
Genus	Dictyocaulus
Species	D. arnfieldi

Dictyocaulus arnfieldi from horse faeces - Joaquim Castellà Veterinary Parasitology Universitat Autònoma de Barcelona

Also known as: Equine lungworm

Hosts

Donkeys, and occasionally horses.

Identification

D. arnfieldi are of the superfamily Trichostrongyloidea. Adults are slender, thread-like and white. Females are larger than males at around 6.5cm in length. The males have a small non-lobulated bursa.

The embryonated eggs are 80-100µm in length.

Life Cycle

The lifecycle is not greatly known, but it is currently thought to be similar to that of Dictyocaulus viviparus.

The prepatent period is 2-3 months.

Dictyocaulus arnfieldi Learning Resources
Vetstream To reach the Vetstream content, please select	Canis, Felis, Lapis or Equis
Flashcards Test your knowledge using flashcard type questions	Horse Nematode Flashcards
Literature Search Search for recent publications via CAB Abstract (CABI log in required)	Dictyocaulus arnfieldi publications

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@@ Line 1: / Line 1: @@
-== Lungworm ==
+{{OpenPagesTop}}
-=== ''DICTYOCAULUS ARNFIELDI'' ===
+{{Taxobox
+|name               =''Dictyocaulus arnfieldi
+|kingdom            =
+|phylum             =
+|class              =[[:Category:Nematodes|Nematoda]]
+|sub-class          =
+|order              =
+|super-family       =[[Trichostrongyloidea]]
+|family             =
+|sub-family         =
+|genus              =Dictyocaulus
+|species            ='''''D. arnfieldi'''''
+}}
 [[Image:Dictyocaulus arnfieldi.jpg|thumb|right|150px|''Dictyocaulus arnfieldi'' from horse faeces - Joaquim Castellà Veterinary Parasitology Universitat Autònoma de Barcelona]]
-==== General ====
+Also known as: '''''Equine lungworm
-*Lungworm of equidae; adult worms found in smaller bronchi. Frequently incriminated as the cause of a chronic cough.
-==== Morphology and Life-Cycle ====
+==Hosts==
-*Similar to lungworm in cattle, except:
+Donkeys, and occasionally horses.
-**embryonated eggs (80-100µm) passed in fresh faeces; and
-**prepatent period = 12weeks.
-==== Epidemiology ====
+==Identification==
-*Main source of infection = donkeys (remain infected for years) - contaminate horse pasture.
+''D. arnfieldi'' are of the superfamily [[Trichostrongyloidea]].  Adults are slender, thread-like and white.  Females are larger than males at around 6.5cm in length.  The males have a small non-lobulated bursa.
-*Infection can cycle in horses.
+The embryonated eggs are 80-100µm in length.
-{| style="width:75%; height:200px" border="1"
+==Life Cycle==
+The lifecycle is not greatly known, but it is currently thought to be similar to that of ''[[Dictyocaulus viviparus]]''.
-!
+The prepatent period is 2-3 months.
-!'''Horses'''
-!'''[[Lungworm - Donkey|Donkeys]]'''
-|-
+{{Learning
-|'''Prevalence'''
+|flashcards = [[Horse_Nematode_Flashcards|Horse Nematode Flashcards]]
-|10-20%
+|literature search =[http://www.cabdirect.org/search.html?rowId=1&options1=AND&q1=%22Dictyocaulus+arnfieldi%22&occuring1=title&rowId=2&options2=AND&q2=&occuring2=freetext&rowId=3&options3=AND&q3=&occuring3=freetext&x=42&y=10&publishedstart=yyyy&publishedend=yyyy&calendarInput=yyyy-mm-dd&la=any&it=any&show=all ''Dictyocaulus arnfieldi'' publications]
-|75%
+|Vetstream = [https://www.vetstream.com/canis/search?s=nematode Nematodes]
-|-
+}}
-|'''Adult worms'''
-|Few
-|Many
-|-
-|'''Eggs in faeces'''
-|Often zero
-|Many
-|-
-|'''Period of patency'''
-|<8months
-|5+ years
-|-
-|'''Clinical signs'''
-|Sometimes
-|Rarely
-|}
-'''NOTE''': Clinical signs - chronic cough at rest or during exercise, single animal or group of horses, autumn or early winter.
+{{review}}
-*''Dictyocaulus arnfieldi'' causes [[Respiratory Parasitic Infections - Pathology#Dictyocaulus arnfieldi|cough in horses]]
+{{OpenPages}}
-==== Pathogenicity ====
-*Raised areas of over-inflated pulmonary tissue (several cms in diameter) surrounding small bronchus containing worms and mucopurulent exudate.
-*Hyperplastic bronchial epithelium.
-*Peribronchial "cuffing".
-==== Diagnosis ====
+[[Category:Dictyocaulus]][[Category:Horse_Nematodes]]
-*Clinical signs.
-*Grazing history (donkey contact or shared grazing).
-*Faecal examination (only detects patent infections = small proportion of lungworm infections in horses):
-**process sample immediately = McMaster method, embryonated eggs
-**process sample later = Baerman technique, larvae with tail spine.
-*Tracheobronchial washings (large eosinophils).
-*Response to anthelmintic treatment (e.g. resolution of clinical signs = retrospective diagnosis).
-==== Control ====
+[[Category:Expert_Review]]
-*Do not keep horses on pastures grazed by donkeys (potential carriers).
+[[Category:Respiratory Parasitic Infections]]
-*Treat donkeys with appropriate anthelmintic in spring if grazed with horses.
-[[Category:Trichostrongyloidea]][[Category:Horse_Nematodes]]

Difference between revisions of "Dictyocaulus arnfieldi"

Latest revision as of 17:48, 4 June 2016

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Identification

Life Cycle

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