Difference between revisions of "Chorioptic Mange"

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== Diagnosis  ==
 
== Diagnosis  ==
  
*History and clinical signs
+
*History and clinical signs  
 
*A skin scraping from the edge of a fresh lesion will often demonstrate the presence of the mite under a microscope
 
*A skin scraping from the edge of a fresh lesion will often demonstrate the presence of the mite under a microscope
  
 +
<br>
  
 +
== Treatment  ==
  
== Treatment ==
+
'''There&nbsp;are no products&nbsp;currently licensed for treatment of Chorioptes. The list below contains a number of products that have been reported effective'''
  
'''There&nbsp;are no products&nbsp;currently licensed for treatment of Chorioptes. The list below contains a number of products that have been reported effective'''
+
'''Topical'''  
  
'''Topical'''
+
*Clip affected area  
 
+
*1% Selenium sulphide shampoo. Whole body shampoo  
*Clip affected area
 
*1% Selenium sulphide shampoo. Whole body shampoo
 
 
*Fipronil (Frontline spray) on affected area
 
*Fipronil (Frontline spray) on affected area
  
'''Systemic'''
+
'''Systemic'''  
  
*Ivermectin, paste for horses, good to eliminate the mite in a group infestation
+
*Ivermectin, paste for horses, good to eliminate the mite in a group infestation  
 
*Treat all in-contact animals, disinfect housing and dispose of bedding.
 
*Treat all in-contact animals, disinfect housing and dispose of bedding.
  
  
  
 +
== References ==
  
 +
Brown, C.M, Bertone, J.J. (2002) The 5-Minute Veterinary Consult- Equine', Lippincott, Williams &amp; Wilkins <br>Fox, M and Jacobs, D. (2007) Parasitology Study Guide Part 1: Ecotparasites Royal Veterinary College
  
 
+
Lloyd, D.H, Littlewood, J.D, Craig, J.M, Thomsett, L.R. (2003) Practical Equine Dermatology, Blackwell Science<br>Taylor, M.A, Coop, R.L, Wall, R.L, (2007) Veterinary Parasitology third edition, Blackwell Science
  
  
  
 
[[Category:Dermatological_Diseases_-_Cattle]] [[Category:Dermatological_Diseases_-_Sheep]] [[Category:To_Do_-_Clinical|To_Do_-_Kate]] [[Category:Dermatological_Diseases_-_Horse]] [[Category:Integumentary_System_-_Mite_Infections]]
 
[[Category:Dermatological_Diseases_-_Cattle]] [[Category:Dermatological_Diseases_-_Sheep]] [[Category:To_Do_-_Clinical|To_Do_-_Kate]] [[Category:Dermatological_Diseases_-_Horse]] [[Category:Integumentary_System_-_Mite_Infections]]

Revision as of 11:32, 1 March 2011

Introduction

Chorioptes is a non- burrowing mite which resides on the skin surface

Hosts: Cattle, Sheep, Goats, Horses, Rabbits

Predilection sites: Skin- especially legs, feet (particularly heavily feathered horses), udder, abdomen and base of tail

Life cycle: Egg- Larvae- Nymph- Adult. This lifecycle takes around three weeks to complete. Eggs are found attached the the surface of the skin. Adults can survive off the ground for around three weeks, meaning transmission can be via bedding and housing as well as by direct contact.

All species are thought to be affected by the same strain of mite Chorioptes bovis


Pathogenesis

Chorioptes' mouthparts do not pierce the skin and they feed on skin debris and exudate, meaning is pathogenic significance is mild.

In cattle, economic significance is the main factor as infestation can cause damage to the hide by self trauma.


Clinical Signs

  • Cattle and Small Ruminants
  • Usually mild conditon
  • Rubbing and scratching of affected area
  • Hide damage
  • Usually affects the base of the tail, perineum and udder in cattle
  • Usually found on legs of sheep
  • In goats, affects lower hindlegs, hindquarters and abdomen


Horses

  • Induce crusty skin and lesions on the pastern, fetlock and cannon regions
  • Often seen in rough-legged horses with heavy feathering
  • Stamping, rubbing or biting of affected area<span id="fck_dom_range_temp_1298978581579_938" /><span id="fck_dom_range_temp_1298978581579_587" />
  • Occurs more commonly in colder months
  • Exudative proliferative dermatitis with secondary bacterial infection (greesy heels) can occur in severe cases
  • Thickened, hairless skin in more severe cases


Diagnosis

  • History and clinical signs
  • A skin scraping from the edge of a fresh lesion will often demonstrate the presence of the mite under a microscope


Treatment

There are no products currently licensed for treatment of Chorioptes. The list below contains a number of products that have been reported effective

Topical

  • Clip affected area
  • 1% Selenium sulphide shampoo. Whole body shampoo
  • Fipronil (Frontline spray) on affected area

Systemic

  • Ivermectin, paste for horses, good to eliminate the mite in a group infestation
  • Treat all in-contact animals, disinfect housing and dispose of bedding.


References

Brown, C.M, Bertone, J.J. (2002) The 5-Minute Veterinary Consult- Equine', Lippincott, Williams & Wilkins
Fox, M and Jacobs, D. (2007) Parasitology Study Guide Part 1: Ecotparasites Royal Veterinary College

Lloyd, D.H, Littlewood, J.D, Craig, J.M, Thomsett, L.R. (2003) Practical Equine Dermatology, Blackwell Science
Taylor, M.A, Coop, R.L, Wall, R.L, (2007) Veterinary Parasitology third edition, Blackwell Science