Evaluation of the optical refractometer for lamb serum immunoglobulin estimation

Area of Science:

• Veterinary Medicine
• Animal Science
• Biochemistry

Background:

• Neonatal lamb disease resistance is associated with serum immunoglobulin levels.
• Laboratory estimation of immunoglobulins is often performed using the zinc sulphate turbidity test (ZSTT).
• ZSTT is a time-consuming laboratory procedure.

Purpose of the Study:

• To evaluate the optical refractometer as a tool for estimating neonatal lamb serum protein.
• To assess the correlation between refractometer readings and ZSTT results.
• To determine the suitability of the refractometer for on-farm application.

Main Methods:

• An experiment was conducted using neonatal lamb sera.
• Serum samples were analyzed using an optical refractometer to measure refractive index and estimate total protein.
• Serum samples were also analyzed using the zinc sulphate turbidity test (ZSTT).

Main Results:

• Refractometer readings showed a high correlation (r = 0.89) with ZSTT readings.
• The optical refractometer provides a reliable estimate of serum total protein content.
• The refractometer offers a simpler and faster alternative to ZSTT.

Conclusions:

• The optical refractometer is a suitable, cost-effective tool for estimating neonatal lamb serum protein on farms.
• This method can replace or supplement traditional laboratory tests like ZSTT.
• The refractometer facilitates rapid assessment of potential disease resistance in lambs.