Success of nitenpyram in the treatment of ocular myiasis in the orbital cavity of a dog - Case report

Abstract

The aim of this study is to report the efficacy of nitenpyram against Cochiliomiyia hominivorax larvae in ocular myiasis of a naturally infested dog. A female Beagle with ocular myiasis was attended. After care and clinical examination, the involvement of the entire ocular and periocular region was found. The animal was treated orally with a dose of 4.7 mg/kg of nitenpyram together with analgesic medication. The expulsion and fall of live and dead larvae were evaluated by quantification every 15 minutes in the first hour and thereafter at 2, 3, 4, 6 and 18 hour intervals, followed by manual removal of the larvae. Overall effectiveness, larval expulsion rate and larvicidal effect of nitenpyram were determined. In all, there were 140 larvae in the lesion, of which 90 live and 46 dead larvae were expelled, while 4 dead larvae were mechanically removed, presenting 100% overall effectiveness, with larval expulsion activity of 97.1% and larvicidal efficacy of 35.7%. Based on the results obtained in this case, it can be concluded that nitenpyram has rapid and safe action against C. hominivorax larvae, making it a promising therapeutic alternative for the elimination of myiasis in the orbital cavity of dogs.