PDF] A CASE OF NASAL MYIASIS DUE TO OESTRUS OVIS ( NASAL BOT FLY ) IN A NELLORE SHEEP

On necropsy examination, both mature and immature larvae were recovered from the nasal cavity and the Oestrus ovis larvae were confirmed based on the presence of flat, dark pigmented, D-shaped posterior respiratory spiracles and large black oral hooks. A three year old adult sheep was presented to Veterinary Dispensary with the clinical history of head shaking, nasal discharges and it died due to respiratory distress. On necropsy examination, both mature and immature larvae were recovered from the nasal cavity. The Oestrus ovis larvae were confirmed based on the presence of flat, dark pigmented, D-shaped posterior respiratory spiracles and large black oral hooks.

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Oestrus ovis larvae in nasal cavity of sheep: a case report

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File:The larva and fly of the sheep-nostril-fly (Oestrus ovis). C

First instar larva of the sheep nasal botfly (Oestrus ovis