Abstract

Sheep myiasis : recent developments in epidemiology and novel constraints in control. The blowfly (Lucilia sericata), the fleshfly (Wohlfahrtia magnifica) and the nasal-bot fly (Oestrus ovis) are important pests for the sheep industry. Moreover, sporadic opthalmomyiasis cases due to O. ovis are reported in human beings worldwide. In the last 20 years, the epidemiology of ovine myiasis showed considerable evolution in France with a marked spreading of their geographical distribution. A large array of chemical compounds is still available to control these parasites in meat sheep. However, due to revised milk withdrawal times, many efficient chemical compounds are now forbidden in dairy sheep. In the same time, alternative methods to chemical treatments are still in their infancy. Therefore, the information towards sheep breeders and veterinarians is of critical importance to detect clinical cases as soon as possible and for the global survey of these parasitosis.

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