الفهرس 
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Abstract
A grand total number of 1787 sheep and goat carcasses were examined and sampled from Tanta, ELMansoura, and Shebin ELKom
abattoirs.
The investigation and collection of samples continued for 2 years (from January 1999 till December 2000).
In details, a total number of 947, 143 and 440 sheep carcasses and 148, 10 and 99 goat carcasses were examined and sampled for detailed inspection for fascioliases was carried throughout 6 months from January to June 1999 at Tanta abattoir and revealed that sheep carcasses infection was 2.6% while goat carcasses infection was 8.1% mean while, in ElMansoura abattoir during the same period from July to December 1999 it was 4.0% and 20% in sheep & goat respectively.
Moreover in Shebin ELKom abattoir through the same period (from January to June 2000) the Fasciola infection was 6.8% and 19.19% in sheep and goat respectively.
The detailed inspection for hydatidosis during 6 months from January to June 1999 at Tanta abattoir revealed that the percentage of hydatidosis were 0.73% and 0.67% for sheep and goat carcasses while at ElMansoura abattoir during the same period (from July to December 1999 they were 6.13% and 20% for sheep and goat carcasses respectively, while in Shebin ElKom throughout the same period (from January to June 2000) the percentage were 5% and 3.03% for sheep and goat respictively.
While the detailed inspection for Cycticercus ovis during 6 months at Tanta abattoir (from January to June 1999) revealed that the percentages of C. ovis were 1.37 and 3.39% for sheep and goat carcasses respictively. While at ElMansoura abattoir during 6 months (from July to
December 1999) they were 1.84% and 20% for sheep and goat carcasses respectively. While at Shebin Elko during the same period (from January to June 2000 they were 3.4% and 2.02% for sheep and goat respectively.
Moreover, this investigation was done on a total of 200 sheep and goat carcasses (100 of each) collected from Tanta abattoir to estimate the rate of enteric parasite infection during period from January to December 2000.
The results revealed that infestation with Haemonchus spp., Ostertagia spp., Trichostrongylus Spp., Cooperia spp., Oesophagostomum spp., Trichuris spp., Chabertia spp., Monezia spp., and Avitellina spp. were 70.42%, 63.38%, 80.28%, 26.76%, 12.68%, 14.08%, 11.27%, 67.61% and 11.27%, respectively for sheep carcasses while in goat carcasses were 67.57%, 56.76%, 79.73%, 22.97%, 17.57%, 17.57%, 13.51%, 66.22% and 12.16%, respectively for the same species.
Chemical examination was done on 60 random samples of sheep and goat meat (30 of each) from which 15 were infected samples with enteric parasites and 15 were not infected to determine the effect of intestinal parasites on meat quality.
The results for pH values were 5.76+0.02 and 5.62 + 0.02 for infected and non infected sheep receptively, while 5.87+ 0.02 and 5.63 + 0.03 for infected and non infected goat, respectively.
While the results for TBA were 0.12 + 0.02 and 0.05 +0.01 for infected and not infected sheep and 0.09 + 0.01 and 0.04 + 0.01 for infected and non infected goat.—AM* 4 411 4 lid .
On the other hand, the histopathological examination of infected sheep livers with fascioliasis revealed parasitic tracks, degenerative changes, coagulative necrosis of the hepatocytes and thickening of the hepatic capsules. Fibrous tissue proliferation of the portal areas replacing hepatic parenchyma and resulting in cirrhosis were observed in many cases. Moreover, chronic cholangitis characterized by hyperplasia of the bile duct epithelium and thickening of the wall due to fibrous tissue proliferation were also detected.