Difference between revisions of "Chorioptic Mange"

From WikiVet English
Jump to navigation Jump to search
 
(6 intermediate revisions by 2 users not shown)
Line 1: Line 1:
 +
{{OpenPagesTop}}
 
== Introduction  ==
 
== Introduction  ==
  
Line 5: Line 6:
 
== Pathogenesis  ==
 
== Pathogenesis  ==
  
Chorioptes' mouthparts do not pierce the skin and they feed on skin debris and exudate, meaning is pathogenic significance is mild.  
+
Chorioptes' mouthparts do not pierce the skin and they feed on skin debris and exudate, meaning its pathogenic significance is mild.  
  
 
In cattle, economic significance is the main factor as infestation can cause damage to the hide by self trauma.  
 
In cattle, economic significance is the main factor as infestation can cause damage to the hide by self trauma.  
 
  
 
== Clinical Signs  ==
 
== Clinical Signs  ==
  
'''Cattle and Small Ruminants<br>'''
+
'''Cattle and Small Ruminants'''
  
*Usually mild conditon
+
The disease in these species is usually very mild and not often noticed by stockmen. Signs that are noticed include rubbing and scratching of the affected area and damage to the hide (often not seen until after slaughter).
*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
 
  
<br>
+
Typically affected areas are the base of tail, perineum and the udder, as well as legs of sheep and goats.
  
 
'''Horses'''  
 
'''Horses'''  
  
*Induce crusty skin and lesions on the pastern, fetlock and cannon regions
+
The disease is more noticable in horses, with them shaking, scratching, rubbing, stamping and biting the affected areas regularly. Crusty skin lesions on the pastern, fetlock and cannon are a common manifestation as well as thickening of the skin and loss of hair in chronic cases.
*Often seen in rough-legged horses with heavy feathering
 
*Stamping, rubbing or biting of affected area&lt;span id="fck_dom_range_temp_1298978581579_938" /&gt;&lt;span id="fck_dom_range_temp_1298978581579_587" /&gt;
 
*Occurs more commonly in colder months
 
*Exudative proliferative dermatitis with secondary bacterial infection&nbsp;(greesy heels) can occur in severe cases
 
*Thickened, hairless skin in more severe cases
 
  
<br>
+
The problem is worse in colder months and mud can exacerbate the problem to lead to exudative proliferative dermatitis with secondary bacterial infection ([[Greasy Heel|greasy heel]]) in severe cases.
  
 
== Diagnosis  ==
 
== Diagnosis  ==
  
*History and clinical signs  
+
History and clinical signs are often used to make a presumptive diagnosis.
*A skin scraping from the edge of a fresh lesion will often demonstrate the presence of the mite under a microscope
 
  
<br>
+
A skin scraping from the edge of a fresh lesion will often demonstrate the presence of the mite under a microscope.
  
 
== 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'''  
+
Always clip the affected area.
 +
 
 +
'''There are no products 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  
*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.
 
  
<br>
+
Treat all in-contact animals and disinfect bedding, housing and any shared tack (horses).
  
 
== References  ==
 
== 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  
+
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 ''
 +
 
 +
 
 +
{{review}}
  
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
+
{{OpenPages}}
  
[[Category:Dermatological_Diseases_-_Cattle]] [[Category:Dermatological_Diseases_-_Sheep]][[Category:To_Do_- Review]][[Category:Dermatological_Diseases_-_Horse]] [[Category:Integumentary_System_-_Mite_Infections]]
+
[[Category:Dermatological_Diseases_-_Cattle]] [[Category:Dermatological_Diseases_-_Sheep]] [[Category:Expert_Review - Horse]][[Category:Expert Review - Farm Animal]] [[Category:Dermatological_Diseases_-_Horse]] [[Category:Integumentary_System_-_Mite_Infections]]

Latest revision as of 16:07, 30 July 2012


Introduction

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 its 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

The disease in these species is usually very mild and not often noticed by stockmen. Signs that are noticed include rubbing and scratching of the affected area and damage to the hide (often not seen until after slaughter).

Typically affected areas are the base of tail, perineum and the udder, as well as legs of sheep and goats.

Horses

The disease is more noticable in horses, with them shaking, scratching, rubbing, stamping and biting the affected areas regularly. Crusty skin lesions on the pastern, fetlock and cannon are a common manifestation as well as thickening of the skin and loss of hair in chronic cases.

The problem is worse in colder months and mud can exacerbate the problem to lead to exudative proliferative dermatitis with secondary bacterial infection (greasy heel) in severe cases.

Diagnosis

History and clinical signs are often used to make a presumptive diagnosis.

A skin scraping from the edge of a fresh lesion will often demonstrate the presence of the mite under a microscope.

Treatment

Always clip the affected area.

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

Topical

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 and disinfect bedding, housing and any shared tack (horses).

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




Error in widget FBRecommend: unable to write file /var/www/wikivet.net/extensions/Widgets/compiled_templates/wrt6768b8f6efdc18_21716239
Error in widget google+: unable to write file /var/www/wikivet.net/extensions/Widgets/compiled_templates/wrt6768b8f7394ec6_72995274
Error in widget TwitterTweet: unable to write file /var/www/wikivet.net/extensions/Widgets/compiled_templates/wrt6768b8f77733a9_99578418
WikiVet® Introduction - Help WikiVet - Report a Problem