The effects of natural materials (Stevia liquid, staxanthin mixed feed, and zeolite powder) on the somatic cell count of holstein cows with spontaneous mastitis
2010
Morinaga, F., National Inst. of Animal Health, Seki, Gifu (Japan). Poultry Disease Lab. | Satou, T. | Sasaki, K. | Yoshida, S. | Kiku, Y. | Ozawa, T. | Hayashi, T.
The objective of this study was to evaluate the effect of natural materials (stevia liquid, astaxanthin mixed feed, and zeolite powder) on the somatic cell count and total bacteria count in quarter and individual milk levels of Holstein cows with spontaneous mastitis. In Experiment I, 5 cows (10 samples of quarter milk) were each fed 100mL of stevia liquid diluted with 100 mL of water for 3 days. The results were compared with a control group of 5 cows (7 samples of quarter milk) who were not fed the stevia. In Experiment II, 7 cows (10 samples of quarter milk) were each fed 50 grams of astaxanthin mixed feed once a day for 54 days. The results were compared with a control group of 6 cows (8 samples of quarter milk) who were not fed the astaxanthin. In Experiment III, 80 lactating cows kept in a free stall barn were each fed 200 grams of zeolite powder mixed with their TMR feed once a day for 8 months. In Experiments I and II, there were no significant differences between the material groups and control groups, indicating that both stevia liquid and astaxanthin mixed feed did not have any effect on reducing the linear score or bacteria count of the mastitis cows. In Experiment III, however, the linear scores of the milk levels decreased after being fed the zeolite powder. Also the monthly ratio of lactating cows with linear scores of 5 and above decreased and was overall lower than the previous year. In conclusion, the results suggested that of the natural materials tested, zeolite powder reduced the milk somatic cell count in Holstein cows with spontaneous mastitis.
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