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دکتر آرش امیدی، استاد گروه مدیریت بهداشت دام، دانشکده دامپزشکی دانشگاه شیراز
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The effects of post-partum drops in body condition on indices of energy metabolism in mid-lactation Holstein cows
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Article 3, Volume 20, Issue 3 - Serial Number 68, Summer 2019, Page 180-185  PDF (350 K) |
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Document Type: Full paper (Original article) |
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DOI: 10.22099/IJVR.2019.5348 |
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Authors |
A. Omidi   1; M. Mohebbi-Fani1; S. Nazifi2; A. Mirzaei2; M. Seirafinia3 |
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1Department of Animal Health Management, School of Veterinary Medicine, Shiraz University, Shiraz, Iran |
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2Department of Clinical Sciences, School of Veterinary Medicine, Shiraz University, Shiraz, Iran |
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3Ph.D. Student in Feed Hygiene, Department of Animal Health Management, School of Veterinary Medicine, Shiraz University, Shiraz, Iran |
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Abstract |
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Background: Evaluation of energy metabolism indices in mid-lactation Holstein cows is critical to monitor health status. Aims: The objective of this study was to assess the effects of low (≤0.75) vs. high (>0.75) drops in body condition score (BCS) until day 60 post-partum on energy metabolism indices during mid-lactation in Holstein cows. Methods: Twenty-eight Holstein cows were included in the study from the day of calving to day 120 of lactation. Whole blood samples were taken on 60, 90, and 120 days in milk (DIM). Serum was analyzed for insulin, glucose, non-esterified fatty acids (NEFA) and beta-hydroxybutyrate (BHB) levels. Results: In cows with low BCS drop (LoD group), insulin did not change significantly through days 60 to 120 of lactation, but increased in high drop cows (HiD group) (P<0.001). Glucose concentrations decreased linearly in the LoD cows (P=0.039) and showed a quadratic increase in the HiD group on day 90 (P=0.028). Concentrations of non-esterified fatty acids showed both linear (P=0.04) and quadratic (P=0.002) changes in the HiD group. The HiD cows had significantly higher concentrations of insulin on day 120 (P=0.017) compared to the LoD group. Glucose concentration was lower (P<0.01) in HiD cows on 60 DIM. The concentration of non-esterified fatty acids was higher in HiD cows on day 90 (P<0.01). Surrogate indices of insulin resistance (calculated based on the concentrations of the measured metabolites) were different between the groups on day 90, indicating decreased insulin sensitivity in the HiD cows. Conclusion: Greater depletion of body reserves during early lactation may result in some inconsistencies in energy metabolism during mid-lactation periods. Controlling BCS loss during early lactation may help alleviate such alterations possibly through modifying insulin sensitivity of the tissues. |
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Keywords |
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BCS; Energy metabolism indices; Holstein cows; Insulin sensitivity; Lactation |
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موضوع :
مباحث پژوهشی -
تعداد بازدید :
572
بار
ارسال شده
در دوشنبه 1 مهر 1398 - 12:41 |
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در فصل دهم از کتاب تازه منتشر شده طب رفتاری اسب به دو مقاله ما ارجاع داده شده است. فصل دهم کتاب به همراه اطلاعات آن در ادامه مطلب قابل دریافت است.
http://www.arashomidi.com/pic/1562799150_.pdf
http://www.arashomidi.com/pic/1562818556_.pdf
Omidi A, Vakili S, Nazifi S, Parker MO. Acute-phase proteins, oxidative stress, and antioxidant
defense in crib-biting horses. J Vet Behav 2017;20:31–6.
Omidi A, Jafari R, Nazifi S, Parker MO. Potential roles of selenium and zinc in the pathophysiology
of crib-biting behavior in horses. J Vet Behav 2018;23:10–4.
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موضوع :
مباحث آموزشی -
کتابهای مفید آموزشی
تعداد بازدید :
783
بار
ارسال شده
در چهارشنبه 19 تير 1398 - 09:17 |
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Article 2, Volume 20, Issue 2, Spring 2019, Page 89-95 PDF (221 K) |
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Document Type: Full paper (Original article) |
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DOI: 10.22099/IJVR.2019.5256 |
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Authors |
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M. Mohebbi-Fani1; A. Omidi 1; A. Mirzaei2; S. Nazifi2; E. Pourtajabadi3; M. Badkoobeh3 |
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1Department of Animal Health Management, School of Veterinary Medicine, Shiraz University, Shiraz, Iran |
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2Department of Clinical Sciences, School of Veterinary Medicine, Shiraz University, Shiraz, Iran |
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3Graduated from School of Veterinary Medicine, Shiraz University, Shiraz, Iran |
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Abstract |
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Background: The sub-clinical carry-over effects of post-partum (PP) conditions and the problems independent of parturition may affect the cows’ performance during the breeding period. Aims: It was hypothesized that some mid-lactation cows may have compromised liver functions and calculating liver activity index (LAI; -1.5 to +1.5) may be helpful in detecting such conditions. Methods: Plasma lipid and protein profiles, retinol and ceruloplasmin were measured in 37 Holstein cows on days 60, 90, and 120 PP. Liver activity index was calculated using the measures of cholesterol, albumin and retinol. The results were interpreted using some health and performance indices. Results: The mean LAI was 0.00 ± 0.61. Sixteen cows (45.7%) were LAI‾ and 19 cows (54.3%) were LAI+. In LAI+ cows the concentrations of cholesterol and albumin were unchanged, but in LAI‾ cows both of them increased through the study (P<0.05). Greater concentrations of low density lipoproteins (LDL) (P<0.01) and lower concentrations of γ- and total globulins (P<0.05; day 60) were detected in LAI+ cows. Ceruloplasmin was not different between the LAI groups with the highest level on day 90. Cholesterol had the strongest and the most repeated correlations with LAI during the study. The correlation of albumin with LAI faded on day 120 and vitamin A had a relationship only on day 60 PP. Triglycerides (TGs), very low density lipoproteins (VLDL) (day 60) and LDL (days 60 and 90) had positive correlations with LAI. All globulin fractions showed negative correlations with LAI on day 60. Seventy percent of the cows without endometritis (day 30 PP) and 33% of the infected cows were LAI+ during the breeding period. About 79% of the cows with body condition score (BCS) loss ≤0.75 (day 60) and 38% of the cows with BCS loss >0.75 were LAI+ during the breeding period. Conclusion: Compromised liver functions may exist in dairy cows during the breeding period and may be detected by calculating LAI. The relationship of LAI during the progressed lactation with herd’s performance needs to be investigated. |
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موضوع :
مباحث پژوهشی -
مقالات پژوهشی
تعداد بازدید :
538
بار
ارسال شده
در سه شنبه 4 تير 1398 - 08:27 |
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Zinc and Manganese of serum were negatively, but Copper positively influenced by Iron elevation in diet of male Wistar rats
April 2019
International Journal for Vitamin and Nutrition Research
DOI:
10.1024/0300-9831/a000456
Ali Zolfaghari
Hamid Reza Gheisari
 Arash Omidi
 Saeed Nazifi
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موضوع :
مباحث پژوهشی -
مقالات پژوهشی
تعداد بازدید :
702
بار
ارسال شده
در چهارشنبه 1 خرداد 1398 - 10:38 |
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Acute-phase proteins and antioxidant status in cows naturally infected by hydatid cysts in the Razavi Khorasan Province
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Article 1, Volume 2, Issue 1, Winter and Spring 2017, Page 1-7  PDF (510 K) |
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Document Type: Research Paper |
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DOI: 10.22055/IJRHR.2017.14412 |
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Abstract |
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Parasitic infections can be extremely problematic for animals and humans. Host-parasite relationships may be different between species. The purpose of this study was to evaluate Haptoglobin (Hp), Serum amyloid-A (SAA), Alpha -1- acid glycoprotein (AGP), Albumin (ALB), Total protein (TP), Globulin (GLB), Malondialdehyde (MDA), and Total antioxidant capacity (TAC) following natural infection with hydatid cysts in cows. This study was undertaken in a slaughterhouse in Torbate-Heidarie, Razavi Khorasan province, Iran, in January 2016. Four hundred cows were examined. Clinical examination prior to slaughter was done by an expert veterinarian and all clinically healthy cows were used in the study. The age determination was done according to the dental formula. Blood samples were obtained before slaughtering. Eventually, 60 cows with hydatid cysts and 60 apparently healthy cows were included in the study and control groups, respectively. The results indicated that acute phase proteins were not changed in naturally infected cows with hydatid cysts. It could be concluded that host-parasite relationship might be different in species such as cows and sheep. This finding may be due to a difference between species or a different behavior of hydatid cysts in cows and sheep. |
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Keywords |
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Abattoir; Acute phase proteins; Antioxidant; Cow; hydatid cysts |
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موضوع :
مباحث پژوهشی -
مقالات پژوهشی
تعداد بازدید :
770
بار
ارسال شده
در شنبه 28 ارديبهشت 1398 - 12:44 |
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http://uupload.ir/view/bai5_5th_animalhealth_booklet.pdf/
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موضوع :
مباحث آموزشی -
تعداد بازدید :
829
بار
ارسال شده
در شنبه 31 فروردين 1398 - 10:05 |
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موضوع :
سایر موارد -
تعداد بازدید :
931
بار
ارسال شده
در شنبه 17 فروردين 1398 - 01:21 |
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كتاب Veterinary Medicine در ويرايش يازدهم خود كه اخيراً در سال 2017 ميلادي به چاپ رسيده، به 21 مقاله از اساتيد دانشكده ي دامپزشكي دانشگاه شيراز ارجاع داده است.
آقايان دكتر سعيد نظيفي (4 مقاله)؛ دكتر علي رضاخاني (3 مقاله)؛ دكتر آرش اميدي، دكتر علي اصغر چالمه، دكتر علي حاجي محمدي و دكتر احمد عريان (هر كدام 2 مقاله) و دكتر مهرداد پورجعفر، دكتر عليرضا رعايت جهرمي، دكتر شهرام شكرفروش، دكتر محسن قانع، دكتر خداداد مستغني و دكتر ناصر وصال (هر كدام 1 مقاله) از اساتيدي هستند كه به مقالات آن ها در اين كتاب ارجاع داده شده است.
كتاب Veterinary Medicine بيش از نيم قرن است كه در زمينه ي بيماري هاي داخلي دام هاي بزرگ در آمريكا منتشر و يكي از معتبرترين كتب مرجع دامپزشكي جهان مي باشد كه در تمام دانشكده هاي دامپزشكي دنيا تدريس مي شود.
اين كتاب به بررسي تفصيلي بيماري هاي مختلف در دام هاي بزرگ شامل بيماري هاي دستگاه هاي مختلف بدن؛ بيماري هاي متابوليك؛ مسموميت ها؛ كمبودها؛ بيماري هاي عفوني و انگلي؛ بيماري هاي نوزادان؛ بيماري هاي با منشاء ناشناخته و نوپديد و .... پرداخته و همواره راهگشاي مسائل علمي و باليني در حيطه هاي مرتبط با بيماري هاي داخلي دام هاي بزرگ بوده است.
كتاب Veterinary Medicine نخستين بار در سال 1960 ميلادي منتشر شد و پس از آن در سال هاي مختلف مورد بازنگري هاي متعدد قرار گرفت.
شايان ذكر است كه در ويرايش اخير اين كتاب به 6 مورد از مقالات منتشر شده در نشريه ي Iranian Journal of Veterinary Research كه در دانشكده ي دامپزشكي دانشگاه شيراز چاپ مي شود و از مجلات معتبر ISI در زمينه ي دامپزشكي مي باشد نيز ارجاع داده شده است.
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موضوع :
مباحث آموزشی -
تعداد بازدید :
4094
بار
ارسال شده
در سه شنبه 12 بهمن 1395 - 02:08 |
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Journal of Dairy Research, Cambridge University Press
Abstract
The purpose of the study reported in this Research Communication Was to evaluate alterations in concentration of total antioxidant capacity (TAC) of plasma, plasma total thiols as markers of oxidative protein damage and malondialdehyde (as a final product of lipid peroxidation) in samples obtained at different stages of the lactation cycle and dry period of dairy cows. We found that TAC was significantly lower in the primiparous cows compared to multiparous cows. This study clearly demonstrates a need for monitoring primiparous ...
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موضوع :
مباحث پژوهشی -
تعداد بازدید :
3542
بار
ارسال شده
در سه شنبه 21 دي 1395 - 12:40 |
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افراد آنلاين : 1
امروز : 72
ديروز : 103
اين هفته : 394
اين ماه : 1060
امسال : 7248
کل بازديد : 112338
کل مطالب : 74
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