Surgical removal of ocular Setariosis in horse case report

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					        Surgical removal of ocular Setariosis in a horse
                        A case report
                                S. S. Pitlawar
    The occurrence of equine intra ocular parasite has been reported from many
parts oflndia including J & K (Bhadwal et ai, 1998) surgical treatment has been
advocated & found successful (Pawde & Gupta, 1994, Hoque et ai, 1996 and
Bhardwaj et ai, 2000), though medical treatment has been reported (Moore
et ai, 1983). Ocular Setariosis is caused by the erratic migration of immature
stages of setaria labiato-papillosa (S. dig Iitata) and setaria equi. The infection
occurs in equines when infected mosquito's feed around eyes and deposit the
infective larvae there, which enter and migrate in the aqueous humor of the
eye. The damage to the eye is caused by the serrated cuticle of the worm and
movement of larvae (Jaiswal et ai, 2006). In early cases lacrymation and
conjunctivitis is seen, this is followed by the cloudiness of the cornea and
ultimately the corneal opacity. Photophobia may also be seen. Same type lesion
is also found in Thalizia infection of the eye but in that case the worms
are found in conjunctival sac only and not in the aqueous chamber. The
present case report describes the successful removal of the setaria worm III .
a horse.

Case history :-

    A 4 year red hor e was presented to the Veterinary Dispensary Dhamdai
tq / Dist    andurbar with the history of corneal opacity, lacrymation,
photophobia and poor vision. The examination of the eye revealed the thread
like worm having the vigorous movement in the aqueous humour causing the
severe type of corneal opacity.

Diagnosis   :-

  Depending upon the symptoms and the activity of the worm in the aqueous
humour and is confirmed by the surgical removal of the parasite.

Surgical procedure :-
   The animal was controlled by performing anaesthesia with Xylazine @ I
mg/kg body weight & Ketamine @ 2 mg/kg body weight. Auriculo-palpebral
nerve block and retrobulbar nerve block was performed by injecting 2 %
Xylocaine solution. Five to six drops of 2 % Xylocaine was instilled in the
eye for topical anaesthesia. A small stab incision with 11 no Bard Parker blade
was at the limbus at 6'0' clock position the worm was expelled out with
aqueous humour and is preserved in the formalin solution. The aqueous humour
is replaced with hydroxypropyl methyJcellulose 2 % Wlv to maintain the position
of the lens as well as the shape and size of the eyeball. The incision was sutured
with 710 black braided silk. The membranoplasty was performed to achieve the
early recovery. Postoperatively instillation of an!ibiotic eye drops for four days.

Acknowledgment :-

   Authors are thankful to the District 'Animal Husbandry Officer Dr. M. L.
Salve for providing & promoting the technical activities and the owner of the
horse Shri Nandkumar Patil, Dhamdai for the co-operation.

References :-

   Bhadwal, M. S.; Sharma, R. K. and Jatinder Singh (1998). Equine intraocular
parasite, Centaur. 24 (3) : 81-83.                                '

   Bhardwaj, H. R.; Bhadwal, M. S. and Soodan, J. S. (2000) Surgical
removal of the eye worm in a horse - A case report in Intas Polivet 2000
Vol.l,I: 101.

   Hoque, M.; Aithal, H. P.; Amarpal and Pawade, A (1996). Surgical removal
of intra ocular parasite in a mare. J. Rem. Vet. Corp. 35(1) : 25-26 .

  . Jaiswal, S. ; .Singh, S. Y.; Singh, B and Singh, H. N. (2006). Ocular
setariosis in a horse in Intas Polivet (2006) Vol. 7 (2006) No. I : 67-68.

   Moore, C. P.; Sarazan, R. D.; Whitly, R. D.; and Jackson, W. F. (1983).
Equine ocular parasites a review. Equine vet. J. (Suppl-l l ) : 76-85 Abst. 3432
(Vet Bull. 54 (6)

   Pawde, A and Gupta, S. C. (1994) Setaria digitata in eye of colts. Indian
J. Vet. Res. 3 (1) : 62.

*     Livestock Development Officer, (Tech) Zilla Parishad Nandurbar.
**    Livestock Development Officer, Veterinary Di-spensary, Karenkheda.
**.   Livestock Development Officer, Veterinary Dispensary, Borala.


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