[Concentration of species alien (bovine) IgG in the blood serum of foals after the intake of non-species specific colostrum preparation].

The study investigates the impact of a non-specific bovine (cattle) colostrum supplement given to newborn foals (baby horses) and primarily, it measures the level of bovine Immunoglobulin G (IgG) in their blood over time. The findings indicate that although the IgG levels peak initially, they soon decline and no antibodies against bovine IgG are detectable, suggesting such a supplement may not effectively boost the foals’ immunity.

Research Methodology

• The study started with 16 newborn foals that had natural access to their mothers’ colostrum (the initial milk full of antibodies crucial for early immunity).
• The researchers disributed to these foals a commercial colostrum additive (supplement) that had been derived from bovine colostrum. This supplementation was not species-specific, meaning it wasn’t specifically designed for horses, but was made from cow colostrum.
• This additive was administered within the first 18 hours after birth, a critical period for acquiring immunity through colostrum in many mammals.

Key Findings

• At birth, there were no detectable levels of bovine IgG in the foals. An increase was observed after the intake of the supplement.
• The bovine IgG concentration peaked at 18 hours after birth, averaging 74.6 mg/dl.
• However, 96 hours post-birth, the IgG levels had dropped significantly, averaging 20.9 mg/dl, indicating that the foals’ bodies did not retain the introduced bovine IgG.
• The researchers also found a strong correlation between the level of bovine IgG and the activity of Gamma-glutamyltransferase (GGT) – an enzyme that transfers amino acids across the cellular membrane and whose activity is often used as a marker for liver diseases.
• Importantly, the researchers found no evidence that the foals were developing antibodies against the bovine IgG. Antibodies are a crucial part of the immune response, as they recognize and bind to specific antigens (foreign substances), helping neutralize them.

Conclusion

• The study concludes that the commercial bovine colostrum additive, under the circumstances of the study, failed to induce a satisfactory or lasting increase of IgG in the circulation of the newborn foals.
• Therefore, the supplement might not be an effective way to boost the immunity of newborn foals, despite initially high IgG levels.