Effect of Total and Differential Somatic Cell Counts, Lactation Stage and Lactation Number on Lipolysis and Physicochemical Composition in Camel (Camelus dromedaries) and Cow Milk
محورهای موضوعی : Camel
اچ. حامد
1
(Laboratory of Animal Ecophysiology, Faculty of Science, Sfax University, Sfax, Tunisia)
آ.ف. ال فکری
2
(Laboratory of Animal Ecophysiology, Faculty of Science, Sfax University, Sfax, Tunisia)
آ. گرگوری
3
(Laboratory of Animal Ecophysiology, Faculty of Science, Sfax University, Sfax, Tunisia)
کلید واژه: somatic cell count, lipolysis, Camel milk, physicalchemical composition,
چکیده مقاله :
The present study was carried out to investigate the effects of somatic cell counts (SCC), differential SCC (macrophage (MAC), lymphocyte (LYM) and polymorphonuclear leukocytes (PMN)), number and stage lactation on milk composition in camel and cow milk. Camel milk appeared to contain significantly (P<0.05) a higher content of minerals. Lipolysis level is similar in camel milk compared to cow milk. Lipolysis level increased as MAC level increased in camel’s milk but not in cow’s milk. Our results suggest that MAC play a role in the degradation of dromedary milk fat. Mineral compositions were significantly affected by the SCC in camel milk. The milk composition was not affected by lactation number in both species. Total solid, Ca and Na content in camel’s milk were gradually decreased through lactation.
مطالعه حاضر با هدف بررسی اثرات شمارش یاخته­های پیکری (SCC)، SCC افتراقی (ماکروفاژ (MAC)، لیمفوسیت (LYM) و لوکوسیت­های چندهسته­ای (PMN))، تعداد و مرحله شیردهی بر ترکیب شیر در شیر شتر و گاو صورت گرفته است. شیر شتر به طور معنی­داری (05/0>P) حاوی مواد معدنی بیشتری است. سطح لیپولیز در شیر شتر مشابه شیر گاو است. سطح لیپولیز همگام با افزایش سطح MAC در شیر شتر افزایش یافته ولی در شیر گاو چنین نیست. نتایج حاصل نشان می­دهد که MAC در تجزیه چربی شیر شتر نقش­آفرینی می­کند. ترکیب مواد معدنی به طور معنی­داری تحت تأثیر SCC در شیر شتر واقع می­شود. ترکیب شیر تحت تأثیر تعداد دوره شیردهی در هر دو گونه قرار نمی­گیرد. سطح کل جامدات شیر، کلسیم و سدیم در شیر شتر همگام با پیشرفت دوره شیردهی، کاهش می­یابد.
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