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−*''Sarcoptes scabiei''+
−
<br>
<br>
−==Astigmata Introduction==
+==Astigmata introduction==
Mites are one of the most successful and diverse vertebrate groups. The species of veterinary importance are parasitic, although a few non-parasitic mites are also important, such as oribatid and forage mites.
Mites are one of the most successful and diverse vertebrate groups. The species of veterinary importance are parasitic, although a few non-parasitic mites are also important, such as oribatid and forage mites.
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The taxonomy of mites is complex as there are over 8 families. In this article the families are split according to their location on the host into sub-surface (burrowing) and surface (non-burrowing) mites.
The taxonomy of mites is complex as there are over 8 families. In this article the families are split according to their location on the host into sub-surface (burrowing) and surface (non-burrowing) mites.
+
==Burrowing Mites==
==Burrowing Mites==
+
===Sarcoptidae===
===Sarcoptidae===
+
+
====''Sarcoptes''====
====''Sarcoptes''====
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*Male is about 250μm in length and the female about 400-430μm in length
*Male is about 250μm in length and the female about 400-430μm in length
−'''Life Cycle'''
+*3 weeks life cycle
+'''Life cycle'''
+*'''3 week''' life cycle
*Female lays eggs in epidermis in an '''egg laying pocket'''
*Female lays eggs in epidermis in an '''egg laying pocket'''
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*Adult males emerge and look for females to mate
*Adult males emerge and look for females to mate
+
'''Transmission'''
'''Transmission'''
−*Close contact
*Close contact
*Adults and larvae can be transferred from one skin surface to another
*Adults and larvae can be transferred from one skin surface to another
+
'''Pathogenesis'''
'''Pathogenesis'''
−*Erythema with papule formation
*Erythema with papule formation
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**Alopecia
**Alopecia
−*Intense pruritis for one week
+*Intense pruritus for 1 week
**Self-inflicted trauma
**Self-inflicted trauma
**Scab formation
**Scab formation
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**Rash develops
**Rash develops
−**In [[Parasitic skin infections - Pathology#Scabies|scabies]]
+''Sarcoptes scabiei''
+*Causes [[Parasitic skin infections - Pathology#Scabies|scabies]]
*Strains of ''S. scabiei'' can be passed between different animals and cause clinical signs although the infection is likely to resolve spontaneously and be unlikely to establish
*Strains of ''S. scabiei'' can be passed between different animals and cause clinical signs although the infection is likely to resolve spontaneously and be unlikely to establish
+
'''Diagnosis'''
'''Diagnosis'''
−*Skin scraping until capillary blood appears
*Skin scraping until capillary blood appears
**Adults, eggs, immature mites and faecal pellets can be seen microscopically
**Adults, eggs, immature mites and faecal pellets can be seen microscopically
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*Warm slide over bunsen flame
*Warm slide over bunsen flame
+
'''Treatment'''
'''Treatment'''
−*Acaricide
*Acaricide
**For more information on acaricides click [[Ectoparasiticides|here]]
**For more information on acaricides click [[Ectoparasiticides|here]]
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**Treat boars at 6 month intervals
**Treat boars at 6 month intervals
−=====Sarcoptic Mange=====
+=====Sarcoptic mange in different species=====
+'''Dogs'''
'''Dogs'''
*Highly contagious
*Highly contagious
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*First signs appear at edges of ears, then progresses to muzzle, face and elbows
*First signs appear at edges of ears, then progresses to muzzle, face and elbows
+
'''Cats'''
'''Cats'''