Efficacy of intravenous plasma to transfer passive immunity in clinically healthy and clinically ill equine neonates with failure of passive transfer.

The research paper investigates whether intravenous plasma effectively transfers passive immunity to clinically healthy and sick young horses that have failed to obtain these immunities. The study deduces that knowing the IgG content in the plasma and the health status of the young horse can aid in predicting its response to the treatment.

Research Objective and Methodology

• The main objective of the research was to ascertain the effectiveness of intravenous plasma in transferring passive immunity (essential for fighting diseases) in two categories of equine neonates: those that were healthy but deprived of colostrum, and those that were clinically ill due to failure of acquiring passive immunity.
• The researchers achieved this by studying the increase in serum Immunoglobulin G (IgG) levels, per gram of IgG administered, relative to the body weight. IgG is the main type of antibody found in blood and body fluids and is responsible for controlling infections.
• The level of IgG in the plasma that was to be administered and the health status of the foal that had failed to achieve passive transfer were the two factors considered while predicting a foal’s response to the treatment.

Major Findings

• The research found that healthy foals, that were deprived of colostrum, showed a significantly larger increase in serum IgG levels as compared to the clinically ill foals, in which passive immunity transfer had failed.
• This implies that the ill health of a foal that fails to achieve passive transfer significantly impacts the effectiveness of intravenous plasma in transferring passive immunity.

Implications

• The results of the research suggest the necessity of considering both the IgG content of plasma to be administered and the health status of the foal while predicting the individual foal’s response to treatment.
• Improvements in the methods for transferring passive immunity to foals could lead to greater survival rates and less overall illness in horse herds.
• This research could also provide valuable insights towards refining veterinary care routines for newborn horses.