 |
|
|
دکتر آرش امیدی، استاد گروه مدیریت بهداشت دام، دانشکده دامپزشکی دانشگاه شیراز
|
|
|
 |
Article 2, Volume 20, Issue 2, Spring 2019, Page 89-95  PDF (221 K) |
|
Document Type: Full paper (Original article) |
|
DOI: 10.22099/IJVR.2019.5256 |
|
Authors |
M. Mohebbi-Fani1; A. Omidi   1; A. Mirzaei2; S. Nazifi2; E. Pourtajabadi3; M. Badkoobeh3 |
|
1Department of Animal Health Management, School of Veterinary Medicine, Shiraz University, Shiraz, Iran |
|
2Department of Clinical Sciences, School of Veterinary Medicine, Shiraz University, Shiraz, Iran |
|
3Graduated from School of Veterinary Medicine, Shiraz University, Shiraz, Iran |
|
Abstract |
|
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. |
|
|
موضوع :
مباحث پژوهشی -
مقالات پژوهشی
تعداد بازدید :
3810
بار
ارسال شده
در سه شنبه 4 تير 1398 - 08:27 |
|
|
|
|
| |
|
|
 |
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 ...
|
|
موضوع :
مباحث پژوهشی -
تعداد بازدید :
6254
بار
ارسال شده
در سه شنبه 21 دي 1395 - 12:40 |
|
|
|
|
| |
|
|
|
|
|
افراد آنلاين : 1
امروز : 15
ديروز : 47
اين هفته : 251
اين ماه : 918
امسال : 23743
کل بازديد : 235887
کل مطالب : 77
|
|
|
|
|
|
