تعیین مقادیر بتاکاروتن و ویتامین Aسرم و کبد گوسفندان کشتارشده در کشتارگاه اهواز در فصول مختلف سال

نوع مقاله : مقاله علمی پژوهشی

نویسندگان

1 رزیدنت بیماری‌های داخلی دام‌های بزرگ، دانشکده‌ دامپزشکی، دانشگاه شهید چمران اهواز، اهواز، ایران.

2 استاد گروه علوم درمانگاهی، دانشکده‌ دامپزشکی، دانشگاه شهید چمران اهواز، اهواز، ایران.

3 دانشیار گروه علوم پایه، دانشکده دامپزشکی، دانشگاه شهید چمران اهواز، اهواز، ایران.

4 دانشیار گروه بهداشت مواد غذایی، دانشکده‌ دامپزشکی، دانشگاه شهید چمران اهواز، اهواز، ایران.

چکیده

به­دلیل نقش ویژه ویتامین A در بافت­ها و اعضاء مختلف بدن، در شرایط کمبود آن نشانه­های بالینی متنوعی مشاهده می­گردد. به­علاوه، در مواردی که کمبود مرزی این ویتامین بدون حضور نشانه­های بالینی مشهود مطرح است‎‏، کاهش بهره­وری همچون ناباروری پدید می­آید. در مطالعه حاضر تغییرات فصلی بتاکاروتن و ویتامین A سرم و کبد گوسفندان کشتارشده در کشتارگاه اهواز مورد بررسی قرار گرفته است‏. ‏‏در فاصله آبان ماه سال 1392 لغایت تیر ماه سال 1393 در مجموع 360 رأس گوسفند نمونه­گیری شدند. برای اندازه­گیری فاکتورهای فوق از روش اسپکتروفتومتری استفاده گردید. نتایج با استفاده از آزمون تی (t-test) مورد تحلیل آماری قرار گرفت. میانگین و خطای استاندارد غلظت بتاکاروتن و ویتامین A سرم و کبد به­ترتیب 5/1±9/209 و ‏9/0±98 میکروگرم در دسی­لیتر و 4/0±8/19 و 8/0±3/32 میکروگرم در گرم تعیین گردید. اگرچه غلظت مواد اندازه­گیری شده در بین دو گروه سنی مختلف (گوسفندانی که فقط دندان شیری داشتند و گوسفندان دارای حداقل یک عدد دندان بالغ) اختلاف آماری معنی­دار نداشت، اما میزان سرمی و کبدی ویتامین A در بین دو جنس واجد تفاوت آماری معنی­داری بود (05/0p<)، به نحوی که مقدار سرمی ویتامین A در جنس نر بیشتر از ماده و مقدار کبدی آن در جنس ماده بیشتر از گوسفندان نر تعیین گردید. همچنین غلظت ویتامین A سرم در بین دو فصل اختلاف آماری معنی­داری را نشان داد (05/0p<). در فصل گرم مقدار این فاکتور بیشتر از فصل معتدل بود.

کلیدواژه‌ها

عنوان مقاله [English]

Determination of beta-carotene and vitamin A contents of serum and liver of sheep slaughtered in Ahvaz abattoir during different seasons of the year

نویسندگان [English]

  • N Hedayat 1
  • A Ghadrdan Mashhadi 2
  • A Shahriari 3
  • M Zarei 4
1 Post Graduate Student of Large Animal Internal Medicine, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran.
2 Professor, Department of Clinical Sciences, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran.
3 Associate Professor, Department of Basic Sciences, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran
4 Associate Professor, Department of Food Hygiene, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran
چکیده [English]

Because of the particular role of vitamin A in different tissues and organs, various clinical signs are seen in its deficiency. Additionally, marginal deficiency of vitamin A without the presence of clinical signs leads to performance defects such as infertility. In this study, the seasonal changes of β-carotene and vitamin A of serum and liver of slaughtered sheep in Ahvaz abattoir were investigated. A total of 360 sheep were sampled from October 2013 to June 2014. Spectrophotometry was used for measuring values. The results were analyzed statistically with student t-test. The mean ±SE concentration of β-carotene and vitamin A of serum and liver were 209/9±1/5, 98±0/9 (µg/dl), 19/8±0/4, 32/3±0/8(µg/g), respectively. Although there wasn't significant difference in levels of the measured parameters in two age groups(sheep only with immature teeth and sheep with a minimum mature tooth) but there was a significant difference in vitamin A of serum and liver in the two sexes. The serumic levels of vitamin A in male sheep was more than the females while the concentration of vitamin A in the liver of female sheep was more than the males. The difference between seasons in vitamin A of serum was also statistically different with higher concentrations observed in warm seasons in comparison to milder seasons.

کلیدواژه‌ها [English]

  • Vitamin A
  • Beta-carotene
  • Sheep
  • Ahvaz

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