ABSTRACT
Gastrointestinal nematodes were recorded in 18.13% of the fecal samples collected from sheep at Sharqia Governorate. The chief helminths were Haemonchus species, Strongylus spp., Trichostrongylus spp., Strongyloides papillosus, Nematoduris spp. and Trichuris spp. The prevalence of gastrointestinal nematodes was highest in lambs aged from 3 to 12 months [29.1%], followed by adults [over 2 years of age] [16.2%], while in yearling the incidence was 11.2%. The highest rate [24.5%] of infestation was noticed during winter season, while the lowest [10.6%] was observed during summer season. Moderate drop was observed during autumn and spring. Biochemically, significant decrease in the level of total serum protein, albumin, calcium, inorganic phosphorus and magnesium was observed in infested sheep. An improvement towards the normal level in previously mentioned parameters was observed after treatment. The anthelmintic efficacies of Fenbendazole, Levamisole and Ivermectin were also discussed