 |
|
|
|
Year 2017 - Volume 37, Number 11
|
|
Biochemical and hormonal indicators from healthy and sickly crossbred dairy cows during late pregnancy and early lactation, 37(11):1229-1240
|
ABSTRACT.- Silva Filho A.P., Mendonça C.L., Souto R.J.C., Silva R.J., Soares P.C. & Afonso J.A.B. 2017. [Biochemical and hormonal indicators from healthy and sickly crossbred dairy cows during late pregnancy and early lactation.] Indicadores bioquímico e hormonal de vacas leiteiras mestiças sadias e doentes durante o final da gestação e o início da lactação. Pesquisa Veterinária Brasileira 37(11):1229-1240. Programa de Pós-Graduação em Ciência Veterinária, Universidade Federal Rural de Pernambuco, Rua Dom Manoel de Medeiros s/n, Dois Irmãos, Recife, PE 52171-900, Brazil. E-mail: alonsopsfilho@yahoo.com.br
This study aimed to identify some biochemical and hormonal indicators during late pregnancy and early lactation from healthy dairy cows crossbred compared with those who had some type of clinical disorder throughout the experiment. Therefore, we used 39 Crossbred dairy cows (Holstein x Gyr), divided into two groups, the first (G1) with 22 healthy animals and the second (G2) with 17 cows showed some disease (retained placenta, endometritis, mastitis, foot rot and maternal dystocia). The experiment took place from collections made in the period -60, -40, -20, -10 days before delivery, 0 (parturition day), and +10, +20, +40, +60 days postpartum. We analyzed energy metabolites (glucose, fructosamine, NEFA and β-hydroxybutyrate), hormone (insulin and cortisol), protein (total protein, albumin, globulin and urea) and minerals (CaT, P, Mg, K, Na and Cl). The variables studied were interpreted by analysis of variance at 5% probability. Analyzing the energetic profile, there was a greater mobilization in G2 during childbirth, through the lower fructosamine and glucose values, besides higher concentrations of Agnes and β-hydroxybutyrate. The behavior of the hormones insulin and cortisol was similar, noting only effect of time, whose higher levels occurred on the day of delivery. The protein profile revealed by total protein only time effect in their lowest values were recorded on the day of delivery, however, albumin G2 was lower than the G1 at all times, since the G2 globulin were higher than the group of otherwise healthy cows and urea showed higher concentrations in G1. With respect to the total mineral calcium, magnesium and chlorine showed lower levels from the initial period of the collections in G2. It follows that these metabolites studied early signal nutritional deficiency during late pregnancy, reflecting the transition period, and compromising the adjustment mechanism for cows, thereby increasing the risks to higher incidence of disease. |
| |
|
|
| |
|
|
