Difference between revisions of "Psoroptes"

Latest revision as of 17:17, 4 June 2016

Psoroptes
Kingdom	Animalia
Phylum	Arthropoda
Class	Arachnida
Sub-class	Acari
Order	Sarcoptiformes
Family	Psoroptidae
Genus	Psoroptes

Psoroptes is an oval shaped, astigmatic, non-burrowing mite, causing psoroptic skin infestation in cattle, sheep, horses and rabbits. The most common species of Psoroptes seen within the UK are Psoroptes ovis, and Psoroptes cuniculi.

Psoroptes cuniculi (Copyright Joel Mills, Wikimedia Commons)

Identification

Psoroptes is an oval shaped, with legs longer than those seen in burrowing mites. The males have a pair of copulatory suckers. It is of the family Psoroptidae.

Life cycle

Psoroptes are confined to the skin surface, and feed on serous exudate by a siphoning process.

The Adult female is capable of laying up to 100 eggs during her life time, which is usually just one month. The duration of the life cycle is around 10 days, and consists of two nymphal stages.

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

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-*Causes [[Parasitic skin infections - Pathology#Psoroptic mites|psoroptic skin infestation]]
+{{OpenPagesTop}}
+{{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'' is an oval shaped, astigmatic, non-burrowing mite, causing [[Psoroptic Mange|psoroptic skin infestation]] in cattle, sheep, horses and rabbits.  The most common species of ''Psoroptes'' seen within the UK are ''[[Psoroptes ovis]]'', and ''[[Psoroptes cuniculi]]''.
-'''Recognition'''
+[[Image:Psoroptes cuniculi.jpg|150px|thumb|right|'''''Psoroptes cuniculi''''' (Copyright Joel Mills, Wikimedia Commons) ]]
-*Oval shaped
-*Long legs
+==Identification==
+''Psoroptes'' is an oval shaped, with legs longer than those seen in burrowing mites.
+The males have a pair of copulatory suckers.  It is of the family Psoroptidae.
-*Funnel shaped suckers on '''segmented''' pedicels
+==Life cycle==
+''Psoroptes'' are confined to the skin surface, and feed on serous exudate by a siphoning process.
-*1-2mm in length
+The Adult female is capable of laying up to 100 eggs during her life time, which is  usually just one month.  The duration of the life cycle is around 10 days, and consists of two nymphal stages.
+{{Learning
+|flashcards= [[Mites_Flashcards|Mites Flashcards]]
+|literature search = [http://www.cabdirect.org/search.html?rowId=1&options1=AND&q1=Psoroptes&occuring1=title&rowId=2&options2=AND&q2=&occuring2=freetext&rowId=3&options3=AND&q3=&occuring3=freetext&x=37&y=8&publishedstart=yyyy&publishedend=yyyy&calendarInput=yyyy-mm-dd&la=any&it=any&show=all ''Psoroptes'' publications]
+|Vetstream = [https://www.vetstream.com/canis/search?s=mite Mites]
+}}
-'''Life cycle'''
-*Confined to skin surface
-*Feed on serous exudate by siphoning
+{{review}}
-*Adult female can lay up to 100 eggs during her life time (1 month)
+{{OpenPages}}
-*10 day life cycle
+[[Category:Non-Burrowing Mites]]
-*2 nymphal stages
+[[Category:Expert_Review]]
-====''Psoroptes cuniculi''====
-*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
-====''Psoroptes ovis''====
-*Adult females are large mites at 750μm in length
-*Males identified by copulatory suckers and paired posterior lobes
-*Males attach to deutonymphs (second moult after larval stage) in a process called '''copula'''
-**Males remain in copula until females moult for the last time
-**Copulation occurs
-*Life cycle last '''14 days'''
-*Transmitted by direct contact between sheep
-*Indirect transmission can also occur
-'''Pathogenesis'''
-*Economically important ectoparasite of sheep
-*Causes '''sheep scab'''
-**Wool loss, restlessness, biting, scratching of infested area and decreased productivity through decreased weight gain
-**Usually seen in '''late autumn''' and '''early winter''' (although may also occur in late summer)
-**Population numbers decline after shearing due to a change in the micro-climate, then build up again as the fleece grows
-**'''Notifiable in UK'''
-*Mites found under scabs and in skin folds
-*Lesions most common on flanks, neck, back and shoulders
-*Causes pruritic condition of cattle
-*Active in keratin layer
-*Mouthparts abrade the skin
-*Antigenic material in mite faeces can lead to hypersensitivity reactions
-'''Diagnosis'''
-*Skin scraping
-*KOH added
-*Warm slide over a bunsen flame
-*Examine under a microscope
-'''Treatment'''
-*Sheep
-**Plunge dipping; no less than 1 minute and must dip head at lease once
-**Can treat with avermectins or milbemycins by injection
-*Cattle, horses and rabbits
-**No licensed product for horses in the UK
-**Cattle and rabbits can be treated with avermectins, milbemycins or topical acaricides

Difference between revisions of "Psoroptes"

Latest revision as of 17:17, 4 June 2016

Identification

Life cycle

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