Changes

==Introduction==

==Introduction==

This is an endoparasite, but the main damage is due to anal irritation and stress from that irritation.  

Oxyuris. equi, the equine pinworm, is a well known equine parasite with a worldwide distribution. They are commonly called pinworm because of the sharp, tapering tails of the females measuring up to 15 cm long. Adults primarily live in the right dorsal colon but may inhabit the proximal sections of the large intestine if worm burden is high. The characteristic feature of this parasite is that gravid female worms migrate to the anus to deposit their eggs in sticky clumps seen grossly as a yellowish white or light orange gelatinous streak on the skin of the perianal region. Although some mucosal damage caused by the feeding habit of L4 were reported, a more important effect of this parasite is the perianal irritation and anal pruritis caused by the adult females during the egg laying process.

 

Although a well know equine parasite, O equi received little attention because it was relatively non-pathogenic and could be controlled satisfactorily by routine anthelmintic therapy. However, in recent years, it appeared to exhibit a dramatic change in its biology and anthelmintic susceptibility. This once rare parasite seems to be on the increase in donkeys in the UK.

It is rarely seen in donkeys in the UK.

==Diagnosis==

==Diagnosis==