الفهرس 
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Abstract
A total of (134) Rahmani lambs from one day old up to 2.5 months were used in this study. One hundred and three lambs showed symptoms of diarrhoea and the remain-ing (31) lambs were clinically normal.
The present investigation was planned to study the different etiological agents of diarrhoea in suckling lambs and detection of the mean levels of some blood parameters; including haemoglobin concentration, packed cell volume, serum total protein, total immunoglobulins, protein electrophoretogram, serum glucose, alkaline phosphatase, inorganic phosphorus- calcium, magnesium, serum sodium, potassium, chloride, urea, and creatinine of the diarrhoeic lambs and after response to treatment. The animals belonged to El-Serwe farm, Animal Breeding Research Institute, Domiat Governarate, during lambing season in Feb. 1988.
The results obtained from the bacteriological and parasitological investigations revealed that:
1 - Dietetic disturbances in suckling lambs plays most
important role in evoking diarrhoea.
2 - While bacterial agents such as Escherichia coli, rotEus species and Klebsiella species were isol-ated from diarrhoeic lambs. Among the bacteria isolatedjEscherichia eoli was the most promenant organisms isolated from cases of diarrhoea in suckling lambs.
3 Regarding parasitic causes, it appeared that cocci-
diosis due to different species of genus Eimeria, was serious cause of diarrhoea in lambs.
The data obtained from blood analysis, showed
that:
1 - There was non significant variance in haemoglobin
concentration and packed cell volume of all diarr-hoeic lambs.
2 - There was a significant decrease in serum sodium,
chloride, and magnesium levels of all diarrhoeic lambs. And significant decrease in serum glucose level of diarrhoeic lambs due to dietetic distur-bances, bacterial infection and mixed infection. Also, there was significant decrease in serum calcium and inorganic phosphorus- levels of diarr-hoeic lambs due to mixed infection.
On the other hand, there was significant increase in serum inorganic phosphorus and urea levels of diarrhoeic lambs due to bacterial agents. And a significant increase in serum urea and creat-inine levels was observed in diarrhoeic lambs due
to mixed infection.
3 - There was significant decrease in serum total
proteins levels of diarrhoeic lambs due to bacterial agent and parasitic infestation. And a significant decrease in serum albumin level was observed in diarrhoeic lambs due to mixed infection.
On contrary, serum total immunoglobulins level was significantly increased in diarrhoeic lambs due to bac-terial infection, mixed infection and parasitic infest-ation. Also, there was significant increase in alpha-globulin level in diarrhoeic lambs due to bacterial infection and mixed infection.
Concerning the sensitivity test, the isolated
organisms were found to be highly sensitive to Neomycin, Gentamycin and Colistin, and were moderatly sensitive to kanamycin, Chloramphenicol, Streptomycin, Nitrofurantion and Trimethoprime, and were resistant to Tetracycline, Erythromycin, and Ampicillin.
Regarding trials of treatment with specific chemo-therapy and fluid therapy, it was observed that all parameters under investigation nearly returned to their normal values with improvement of the general condition of the diarrhoeic lambs with stoppage of diarrhea.