Effects of Lactation and Pregnancy on Hematological and Serum Biochemical Profiles of Cross Breed Holstein Friesian Cows in Bishoftu, Ethiopia
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2018-06
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Abstract
The study showed that all hematological indices associated with RBC differed significantly (p<0.05) at different physiological status. In line with this, mean RBC values during different physiological stages differs significantly. The value recorded during early and late stage of lactation differed significantly (p<0.05) from mid stage of lactation. The mean value of PCV of non-pregnant dry cows (27.11±6.07) was significantly lower than the mean value of PCV of the early lactating group (33.18±4.81) and the mean value of the PCV of the late lactating group (32.44± 3.4) respectively. The mean value of the WBC decreases when pregnancy advanced and the mean value of WBC increases when the lactation approach to dry period (from early lactation to late lactation). The mean value of AST in early and late pregnancy were significantly (p<0.05) higher than that of mid pregnancy(20.5±11.7)The mean values of AST in lactation stages that are early, mid and late were 78.3±22.7, 63.12± 19.87 and 62.2±14.4 respectively. The mean values of glucose in pregnant groups increase as the pregnancy advanced and the mean value of glucose in late pregnant group 38.13±5.31 was significantly differs from the mean values of both mid and early pregnancy 24.92±4.12 and 32.36± 4.87 respectively. The mean value of urea in early lactation 32.05±5.73 was significantly higher than both in mid lactation 23.65±7.89 and late lactation 15.8±6.58. The mean value of creatinine in late lactation 1.34±0.44 was significantly higher than the mean value of early lactating groups 0.87±0.16 and the mean value of mid lactating group 1.21±0.42. The mean value of total billrubin mid pregnancy groups 0.24±0.098 was significantly differs from the mean values of both early pregnant group 0.072± 0.06 and late pregnant groups 0.11±0.08. The mean values of total protein in early lactation groups 8.3±1.46 was significantly (p<0.05) differs from the mean values of both mid lactation 7.0±1.9 and late lactation 5.47±1.0. This study showed a significant differences in the mean serum electrolyte values of pregnant and lactating cows in between all groups of study were due to irregular and imbalanced supplement of minerals in feed. Results revealed that most of the measured blood constituents were differed significantly during the period of lactation and pregnancy in Holistian fresain cow. In conclusion, the established reference values will be a useful guide for interpreting serum biochemical and hematologic data in pregnant and lactating cow.
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Hematological, Lactation, Parameters, Pregnancy, Reference value