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Concentration of cortisol, insulin-like growth factor-I and immunoglobulin G class in blood of neonatal calves of different body mass at birth

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Author(s): Kirovski Danijela | Šamanc Horea | Fratrić Natalija | Gvozdić Dragan | Hristov Slavča | Sladojević Željko | Mircu Calin | Tulcan Camelia

Journal: Veterinarski Glasnik
ISSN 0350-2457

Volume: 63;
Issue: 5-6;
Start page: 321;
Date: 2009;
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Keywords: newborn calves | body mass | cortisol | IGF-I | immunoglobulins G class

ABSTRACT
The objective of this work was to examine whether concentrations of cortisol, insulin-like growth factor-I (IGF-I) and immunoglobulin G class (IgG), in fact blood parameters which are believed to be of extreme importance in the postnatal survival of calves, are dependant on the body mass of calves at birth. Investigations were performed on 12 newborn calves of the Holstein-Friesian breed, placed into two groups on the grounds of their body mass at birth. The first group (n=6) comprised calves whose body mass was more than 35 kg at birth (41.67±3.08 kg), while the second group (n=6) comprised calves whose body mass at birth was less than 35 kg (32.00±3.58 kg). Blood samples were taken immediately preceding the consuming of colostrum, as well as at 32 hours of neonatal life. Cortisol and IGF-I concentrations were determined in blood serum samples taken immediately before colostrum consumption, while IgG concentration was determined in the samples taken 32 hours after the birth of the calves. The cortisol concentration in calves born with a greater body mass (61.51±32.78 nmol/l) was lower (p=0.052) than in calves born with a smaller body mass (94.89±17.74 nmol/l). A significant negative correlation (r= -0.592; p
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