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Journal of Entomology and Zoology Studies
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P-ISSN: 2349-6800, E-ISSN: 2320-7078

Journal of Entomology and Zoology Studies

2019, Vol. 7, Issue 6
Thelazia spp. in native and cross bred cows of hilly tracts in Vellore district of Tamil Nadu: A report of 51 cases

M Venkatesan, P Selvaraj, S Yogeshpriya and K Jayalakshmi

Many health cares challenges of native cattle exist and remain unattended due to constraints on many fronts. One such challenge was that of thelaziasis in native hilly cattle of Vellore district was documented. Fifty-one cases of cattle eyeworms were diagnosed in hilly cattle, in a retrospective study of 1500 dairy animal and indigenous cattle, which were presented for field veterinary in and around the villages of Vellore district of Tamil Nadu. Among the various ailments presented, 28 cross breed Jersey and 23 non-descript cows reared in hilly regions and adjoining arears were clinically diagnosed to have the eyeworm Thelazia spp. Selected animals had inappetance, conjunctivitis, unilateral or bilateral lacrimation and corneal opacity. Live worm scrolling over the cornea and conjunctiva was observed. Majority of the eye worm affected animals were from the hilly regions of Vellore (60.78%) than from plains (39.21%). Prevalence of eye worm was higher (68.62%) during summer followed by monsoon periods (31.37%). Non-surgical management using Ivermectin @ 0.2 mg per kg at weekly interval SC, inj. Placentrex (placental extracts) 2ml sub-conjuctivally and supportive care helped in uneventful recovery.
Live worm scrolling over the cornea and conjunctiva (arrow)
Fig. 1: Live worm scrolling over the cornea and conjunctiva (arrow)
Corneal opacity (arrow) in eye worm affected cattle
Fig. 2: Corneal opacity (arrow) in eye worm affected cattle
Pages : 42-44 | 846 Views | 125 Downloads


Journal of Entomology and Zoology Studies Journal of Entomology and Zoology Studies
How to cite this article:
M Venkatesan, P Selvaraj, S Yogeshpriya, K Jayalakshmi. Thelazia spp. in native and cross bred cows of hilly tracts in Vellore district of Tamil Nadu: A report of 51 cases. J Entomol Zool Stud 2019;7(6):42-44.

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