ABSTRACT
Studies of myiasis of sheep and goats in North Sinai resulted in the identification of 21 species of myiasis producing flies. The predominant species was Musca domestica, followed by Lucilia sericata and the least abundant was M. albina. In general, sheep were more infested with wound myiasis than goats. The overall infestation rate was high in summer, followed by spring then autumn. The least rate of infestation was winter. As to the different areas examined, the high rate of infestation was in Bir-Al-Abd, followed by El-Hasanah, El- Arish, El-Sheikh Zowaid and, lastly, Rafah. The factors predisposing to wound myiasis in a descending order of importance in goats were open wound, shearing wound, caseous lymphadenitis, foot rot, fecal staining, ophthalmo or facial eczema, horn fracture, rumen fistula and, lastly, posterior paralysis. In sheep, the most important cause was caseous lymphadenitis, followed by foot rot, then open wound and fecal staining, shearing wound and ophthalmo or facial eczema, otherwise more or less the same as in goats