Changes in blood serum and milk contents during gradually obligatory restricted diet in lactating dairy cows

The effect of extended gradually obligatory underfeeding on milk yield, some milk and blood contents was studied in lactating Friesian cows. The animals were firstly fed on basal lactating diet. The diet was then gradually and weekly restricted for a period of 8 weeks. Blood serum contents showed restriction and thereafter. There was a significant decrease of total serum protein, glucose, calcium and inorganic phosphorus in the second week. Serum magnesium began to decrease in the third week. A significant elevation of total serum lipid recorded in the first week and thereafter. It could be concluded that a physiological response [of milk yield and its fat%] and biochemical alterations [of blood serum contents] indicated the change in metabolism when feed supply was gradually restricted in lactating cows fed on low levels of nutrition

Studies on hypovitaminosis A in frezian calves with special reference to some hematological and biochemical alterations

A nutritional deficiency problem was born in growing calves feeding on rice straw and commercial concentrate mixture [Tanta Company for oil and Soap] during winter season, in which clinical signs of lacrimation, thickness, cloudness and opacity of cornea, appearance of bran-like scales on rough dry skin, coughing, diarrhea, incoordination, stunted growth and inability of vision in dim light, were observed and attributed to vitamin A deficiency. Haematological and biochemical studies on affected animals revealed nonsignificant changes of haemoglobin content, haematocrit percentage, erythrocytic and leucocytic counts, as well as serum total protein, albumin and globulin. Although serum levels of vitamin A, sodium, chloride and glucose were significantly decreased, on the other hand, serum urea nitrogen, creatinin, potassium and serum transaminases were significantly increased. Disappearance of clinical signs as well as corrections of the different haematological and biochemical alterations were observed following therapeutic administration of vitamin A. It could be concluded that, the addition of vitamin A or green food is recommended for growing calves fed on rice straw and commercial concentrate mixture during winter to avoid vitamin A deficiency as well as hepatic and renal dysfunction and general health disturbances

Studies on some urine and serum analysis of healthy, sub and clinical ketosis cows

Urine analysis with "Combi nine urine strip" as well as ketone bodies, glucose, sodium, potassium and transaminases of serum were done for healthy, sub. and clinical ketotic dairy cows within six weeks after parturition from eight farms of dairy friesian cattle, in Dakahleia Governorate. In subclinical ketosis, ketonuria was associated with ketonaemia, less for hypoglycaemia and acidduria, the least for serum transaminases, sodium and potassium, in addition to slight reduction of milk production without apparent physical disturbance. While in ketotic cows ketonuria was highly correlated to aciduria, hyperketonaemia, hypoglycaemia, hyponatraemia and hypokalaemia together with elevation of serum transaminases, as well as severe drop of milk production and appearance of clinical symptoms. The urine concentration of blood, urobilinogen, bilirubin, protein, nitrite and glucose was negative in the three groups. It could be concluded that the "combi nine test" is a simple and reliable diagnostic tool for sub, and clinical ketosis and must be supported by analytical data concerning ketone bodies, glucose, sodium, potassium and transaminases of serum, however, false positive ketonuria only can contribute to overfeeding or underfeeding in healthy cows of the large dairy herd