Evaluation of mouse thymic virus antibody detection techniques.

Area of Science:

• Comparative immunology and virology in laboratory animal models.

Background:

• Mouse thymic virus (MTV) infections can persist and compromise the reliability of research mice.
• Accurate serologic detection of MTV antibodies is crucial for maintaining healthy animal research populations.

Purpose of the Study:

• To compare the efficacy of three distinct serologic assays for detecting antibodies against mouse thymic virus (MTV).
• To evaluate enzyme-linked immunosorbent assay (ELISA), complement fixation (CF) test, and indirect fluorescent antibody (IFA) test performance in detecting MTV antibodies.

Main Methods:

• Serum samples were collected from CD-1 mice inoculated with MTV and from cage-contact controls.
• Antibody detection was performed using ELISA, CF test, and IFA test methods.
• Titers were measured and compared across the three different assay platforms.

Main Results:

• All three methods successfully detected MTV antibodies in inoculated mice by 15 days post-inoculation and in cage-contact mice by 30 days.
• While the incidence of positive results was comparable across methods, ELISA demonstrated substantially higher antibody titers compared to CF and IFA tests.
• ELISA provided a more sensitive quantitative measure of the immune response to MTV.

Conclusions:

• Enzyme-linked immunosorbent assay (ELISA) is a highly effective method for detecting mouse thymic virus (MTV) antibodies, offering higher titer measurements.
• Routine serologic testing for MTV antibodies is recommended to ensure the suitability of mice for research purposes.
• The study highlights the importance of sensitive diagnostic tools in managing viral infections in laboratory animal colonies.