| Abstract: |
This study consisted of field and experimental studies.I) The Field study:Was carried on naturally occurring hypomagnesaemic sheep to study theclinical signs and measure the values ofMg, Ca, Pi, K, CPK and ALP in the sera of those animals and comparing them with normal control animals. Most of studied cases were lactating and grazing ewes especially in winter months. So the effect of grazing, seA group of grazing sheep in winter season were examined and their serawere collected ’to measure the mean value of Mg, Ca, Pi and K during coldmonths. Other group of indoor sheep were examined and their sera werecollected during summer and winter to detect the effectof Mg, Ca, Pi, K, CPK and ALP, and to compare between the indoor and grazing an~,mals also to detect the effect of grazing on sheep in cold weather.Third group of pregnant ewes were used during pregnancy till afterparturition to compare between the levels of Mg, Ca and Pi during pregnancy and after lactation.The obtained results from this study revealed that the hypomagnesaemiain Egyptian grazing sheep were mostly appeared with minimum nervous signsand convulsions and rarely were reaching to the typical form of the disease sothe diagnosis of such cases was only confirmed through a biochemical analysisofMg, Ca and Pi, which revealed significantly decreased values when comparedwith the normal control animals. Therefore significant increases in the mean values of K, CPK and ALP in diseased animals. Also the results revealed that the mean values ofMg, Ca and Pi were significantly decreased in grazing sheep,
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