Difference between revisions of "Psoroptes cuniculi"

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{{OpenPagesTop}}
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*Parasite of rabbits
{{Taxobox
 
|name              = Psoroptes
 
|kingdom            = Animalia
 
|phylum            = [[:Category:Arthropods|Arthropoda]]
 
|class              = [[:Category:Arachnida|Arachnida]]
 
|sub-class          = Acari
 
|order              = Sarcoptiformes
 
|super-family      =
 
|family            = Psoroptidae
 
|sub-family        =
 
|genus              = Psoroptes
 
|species            = ''Psoroptes cuniculi                                                                                 
 
}}
 
Also known as: '''''Ear canker mite
 
  
==Introduction==
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*Common among conventional rabbits
[[Image:Psoroptes cuniculi.jpg|150px|thumb|right|'''Psoroptes cuniculi (Sourced from Joel Mills, Wikimedia Commons) ''']]
 
  
''Psoroptes cuniculi'' is a [[:Category:Non-Burrowing Mites|non-burrowing parasite]], of the class ''Arachnida'' and is seen worldwide. It is found on the ears of the infected host and is generally seen in relatively small amounts.  However, occasionally they will proliferate and the infection will become severe resulting in [[Psoroptic Mange|mange]]. In rabbits, they cause [[Mites – Rabbit#Psoroptiasis|Ear Canker]].
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*Transmitted via contact
  
Predilection site: '''Ears
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*Adapted to living in an aural environment
  
==Hosts==
 
Commonly of rabbits, but also seen in goats, sheep and horses.
 
  
==Identification==
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'''Pathogenesis'''
Adults mite grow up to around 0.75mm in length.  The legs are long and jointed, bearing suckers on the ends on pairs 1, 2, and 4 in the female and 1, 2, and 3 in the male. The adults also have very characteristic pointed mouthparts.
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*The ears are painful and intensely pruritic
  
It is highly likely that ''P. cuniculi'' is simply an adaptation of the species ''[[Psoroptes ovis]]''.
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*Affected rabbits shake their heads and scratch their ears
  
==Life Cycle==
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*The inner surfaces of the pinnae are covered with brown, scaly, fetid material, and the skin beneath is raw
The egg hatches forming an hexapod larvae. The larvae then moults forming a protonymph, which further moults to form a tritonymph, which then moults to become an adult.  Each stage takes around two days, totalling to an approximate 10 day life cycle.
 
  
{{Learning
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*Mites are grossly visible
|literature search = [http://www.cabdirect.org/search.html?rowId=1&options1=AND&q1=%22Psoroptes+cuniculi%22&occuring1=title&rowId=2&options2=AND&q2=&occuring2=freetext&rowId=3&options3=AND&q3=&occuring3=freetext&x=56&y=10&publishedstart=yyyy&publishedend=yyyy&calendarInput=yyyy-mm-dd&la=any&it=any&show=all ''Psoroptes cuniculi'' publications]
 
|flashcards = [[Small Mammals Q&A 21]]
 
|Vetstream = [https://www.vetstream.com/canis/search?s=mite Mites]
 
}}
 
  
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*Histologically, there is chronic erosive and proliferative eosinophilic dermatitis
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**The mites are non-burrowing and thus are found only in the exudate, not in the tissue
  
{{review}}
 
  
{{OpenPages}}
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'''Diagnosis'''
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*Microscopic examination for mites (low magnification)
  
[[Category:Non-Burrowing Mites]]
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*Appearance
[[Category:Rabbit Parasites]]
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[[Category:Expert_Review - Exotics]]
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'''Control'''
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*Infestations are difficult to eliminate from a colony
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**Ivermectin is usually effective
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[[Category:Rabbit]]
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[[Category:To_Do_-_Max]]

Revision as of 10:38, 9 July 2010

  • Parasite of rabbits
  • Common among conventional rabbits
  • Transmitted via contact
  • Adapted to living in an aural environment


Pathogenesis

  • The ears are painful and intensely pruritic
  • Affected rabbits shake their heads and scratch their ears
  • The inner surfaces of the pinnae are covered with brown, scaly, fetid material, and the skin beneath is raw
  • Mites are grossly visible
  • Histologically, there is chronic erosive and proliferative eosinophilic dermatitis
    • The mites are non-burrowing and thus are found only in the exudate, not in the tissue


Diagnosis

  • Microscopic examination for mites (low magnification)
  • Appearance


Control

  • Infestations are difficult to eliminate from a colony
    • Ivermectin is usually effective