الفهرس 
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Abstract
The purpose of this study was to investigate the effect of Pedicoccus on body weight of treated calves and animal conversion rate; The blood picture includes hemoglobin, red blood cell count, white blood cell count, differential white blood cell count, and some chemical changes that included some liver and kidney functions. Ten crossbred male calves (5-6 months) were used, with an average weight of 90-115 kg in good condition. They were raised on a private farm in Dakahlia Governorate, where they were fed a concentrated feed of 18% protein (1% of their body weight). The calves were divided into two equal groups, each of five calves: the first group was the control group (without treatment) and the second group was treated with Max Boost drug (Pedicoccus acidophilus and Pedicoccus acidilactici). The calves were fed with a mixture of the drug after fermentation in 100 ml of water for a period 2-3 hours, then it is added to the water once a day for five months at a rate of 10 g / head / day (each calf from the treated group gets 0.5 kg of the compound). Body weight was measured at the beginning of the experiment, then monthly, and for five months. In addition, the general health of the calves was examined. In addition, at the beginning of the experiment, and the first, second, third, fourth and fifth month after taking the drug, two blood samples were collected from each animal: one on EDETA to prevent thrombosis and one on a dry sterile tube. The results of the studies showed the following : • Significant increase in body weight and total red blood cell count in the treated groups compared to the control group. • Nonsignificant change in feed intake and food conversion rate in the two groups. • Significant decrease in the volume of red blood cells and aspartate aminotransferase in the treated group compared to the control group, while in the second month it showed a significant increase in the volume of red blood cells in the treated group compared to the control group, but at the beginning of the experiment, and the third, fourth and fifth month showed Non-significant changes. in all groups. • Significant increase in total white blood cell count and hemoglobin content in the treated group compared to the control group. • No significant decrease in the volume of red blood cells in the treated group compared to the control group. • The enzyme alanine transaminase had a noticeable decrease in contrast to the data that showed a non-significant change in the basal phosphatase. • A significant increase in total protein is due to a significant increase in albumin and a significant increase in globulin. • A significant decrease in urea in contrast to a significant increase in creatinine. • Non-significant change in mean body size in all groups. • A non-significant change in the average concentration of hemoglobin in the body in all groups, in addition to a significant increase in the number of platelets.