Tumor necrosis factor-α is transferred to equine neonates via colostrum but is not associated with their health status.

The research work aims to address the hypothesis that a reduced transfer of tumor necrosis factor-α (TNFα) to equine neonates could increase their risk of neonatal infection. However, the study suggests that the transfer of TNFα via colostrum does not play a significant role in the protection of newborn horses from infectious diseases.

Research Methodology

• The research team monitored the population of Warmblood mares who were not hospitalized and were under close veterinary surveillance throughout their delivery process and neonatal adaptation.
• They measured the concentration of TNFα and IgG in the colostrum (first milk) of healthy mares and the blood samples collected from their neonates immediately after birth and 18 hours post-delivery.
• The newborn foals were divided into two groups based on the concentration of serum IgG at 18 hours old: the failure of passive transfer (FPT; n = 31) and control (CON; n = 66).
• The health of these foals was assessed multiple times during their first 24 hours of life.

Results

• No significant variances were observed between the FPT and CON groups considering the age and parity of the dams, gestation length, and sex of the foal.
• The concentrations of TNFα in colostrum at birth and in foals at 18 hours were noted to have variations, but no significant differences were found between the FPT and CON groups.
• An unrelated increase in the average serum TNFα concentration was reported until foals were 18 hours old, but without any meaningful differences between the two groups.

Conclusion

• The study’s findings concurred with past research about TNFα being transferred from mares to their neonates via colostrum.
• Nevertheless, the data does not imply that this transfer of TNFα through colostrum plays a critical role in safeguarding the neonates against infectious ailments.