الفهرس 
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Abstract
Twenty¬seven multifarious Holstein¬Friesian cows in a commercial dairy herd were used to investigate the effects of feeding two complete diets differ in CP level, high (19.3%) or low CP (16.9%), with or without supplementation of protected methionine on productive and reproductive performance, milk composition, BCS, and blood metabolites. Therefore, outcome four groups were formed as follows: Group1 (7 cows): received high CP level (19.3% on DM basis) diet non¬supplemented with pMet. Grou2 (6 cows): received as that of group 1 diet, but supplemented with pMet. Group3 (7 cows): received low CP level (16.9% on DM basis) diet non¬supplemented with pMet. Grou4 (7 cows): received as that of group 3 diet, but supplemented with pMet. Protected methionine dose (12 g/cow/d) was designated to compensate partially the theoretically calculated deficiency level of methionine resulting from reducing dietary CP to the level (16.9% CP) that has been expected to achieve the target concentration of MUN (18 mg/dl) for optimal protein nutrition and reproductive performance. The main results can be summarized as follows: A. Nutrient digestibility coefficients and the nutritive values of the experimental rations: Except for EE, digestibility of nutrients was significantly improved by increasing dietary CP level. Consequently, the nutritive values (TDN, DCP, DE, ME and NEL ) were significantly higher for high level of CP diets. On the other hand, digestibilities of DM, OM, CP, EE, CF and NFE were not affected by pMet supplementation. B. Milk yield: Feeding cows diets with decreasing percentage of CP decreased the milk production compared with those fed high dietary CP (32.6 vs 33.4 kg/d) in early lactation, but in mid or late stages of lactation it did not. Additionally, the production response to pMet supplementation was greater with the low level of CP diets compared with the high level (2.00 vs 0.300 kg/d, respectively
This study was carried out to investigate the following:
1- Incidence of cysticercus.species in slaughtered animals in Sohag
abattoirs.
2- Predilection seats of C. bovis and relation between the incidence
of C. bovis and sex, age, seasonal variation in examined
carcasses.
3- Macroscopically and microscopically examination of infested
meat samples.
4- Incidence of Taeniasis among human population in Sohag
Governorate.
5- Compare the sensitivity of ElISA test with post-mortem