ABSTRACT:
The present study was conducted on 120 working horses (Equus ferus caballus)
and 260 donkeys (Equus asinus asinus) during the period from August 2011 to July
2012. These animals belong to different villages in Assiut Governorate, Upper Egypt.
The age of these animals ranged from less than one year to above fifteen years old.
Examination of diseased animals revealed that they suffered from itching, loss of
patches of hair in different regions of the body with appearance of scales on the skin.
The more common sites of infestation were the leg, base of the tail, neck and the head
of animals.
In this study skin scrapings were examined microscopically revealed that chorioptic mange was identified from horses and donkeys in Upper Egypt in percentage of
(13.33% & 15.38 %) , psoroptic mange (2.5 & 3.07%) and sarcoptic mange (1.66
&1.92), respectively, with overall percentage of 14.36 % in horses and donkeys. Infestation by chorioptic mange was recorded to be the most frequent isolated mite in
the examined cases (90%), followed by psoroptic mange (8.6%). While only 1.4% of
positive cases was infested by Sarcoptic mange. statistical analysis of some ecological parameters revealed that there is a significant relationship (p0.05) between the
prevalence of mange mite infesting equines and season, age, housing management as
well as regular or irregular use of acaricides.
Moreover, this study included using different methods of clinical therapeutic
trails. The infested equines with chorioptic mange were classified into four groups.
The first one received two doses of ivermectin (Ivomec, Merial), 14 days apart at
dose rate of 200 Ug/kg oral paste. The second group received two doses of doramectin (Dectomax, Pfizer, Egypt), 14 days apart at dose rate of 200 Ug/kg subcutaneous
injection. The third group received two doses of ivermectin (Ivomec, Merial), 14days
apart at dose rate of 200 Ug/kg oral paste, Adjunct to this drug, deltamethrin
(Butox-50, Intervet) was applied to the surrounding environment (bedding material,
wall, fomites, etc….) twice at a 14 days interval. All cases were isolated in a separate
place during treatment period. The fourth group received two doses of doramectin
(Dectomax, Pfizer, Egypt), 14 days apart at dose rate of 200 Ug/kg subcutaneous injection, Adjunct to this drug, deltamethrin (Butox-50, Intervet) was applied to the
surrounding environment twice at a 14 days interval. We found that administration
of ivermectin or doramectin adjunct with treatment of animal environment is the
best protocol for eradication and prevention of chorioptic mange from infested
equine with mange and its environment.
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