Evaluation of the SNAP foal IgG test for the semiquantitative measurement of immunoglobulin G in foals.

This research paper investigates the accuracy and utility of the SNAP Foal IgG test (IDEXX) in determining the levels of immunoglobulin G in newborn foals, by comparing it against an existing method known as the single radial immunodiffusion (SRID) test.

Method and Subject Selection

• The study used blood samples collected from 42 newborn foals within the time frame of 24 to 48 hours post birth.
• The SNAP Foal IgG test (IDEXX) was selected as the method under evaluation. Its effectiveness was compared against the widely accepted and used single radial immunodiffusion (SRID) test.

Procedure and Results

• The SNAP test demonstrated hustle-free usage and yielded timely results.
• A noticeable similarity was observed between results obtained from the SNAP test and those from the SRID method, with a matching rate of 64%.
• The most accurate readings were observed at extreme immunoglobulin G levels. Low concentrations ( 800 mg/dl) had an accuracy rate of 89%.

Observation and Potential Issues

• Intermediate concentrations of immunoglobulin G were typically lower on the SNAP test in comparison to the SRID test. This discrepancy could potentially be caused by the variable volume of blood added to the test using the sample loop.

Conclusion

• The study concluded that although the SNAP Foal IgG test (IDEXX) provides relatively accurate results, there are specific limitations to consider. In specific, importance should be given to precise blood volume handling when testing intermediate concentrations of immunoglobulin G to avoid inaccuracies.