Which statement is true regarding BSE diagnosis by blood testing?

Which statement is true regarding BSE diagnosis by blood testing?

• A. BSE status can be determined with a blood test.
• B. BSE status cannot be determined with a blood test.
• C. Blood tests can definitively diagnose BSE by antibody titers.
• D. Blood tests can distinguish BSE from other neuro diseases.

Answer: (B)

Diagnosing BSE hinges on detecting the abnormal prion protein in brain tissue, not in blood. Prions accumulate in the central nervous system and cause characteristic changes best seen after death through tests on brain samples—such as immunohistochemistry or Western blot—which confirms infection. Antemortem blood tests have not been validated as reliable or definitive for BSE because prions do not provoke a consistent, detectable antibody response, and blood-based biomarkers lack the specificity and sensitivity required to distinguish BSE from other conditions. Therefore, a blood test cannot reliably determine BSE status or definitively diagnose BSE, making the statement that BSE status can be determined with a blood test incorrect.

Diagnosing BSE hinges on detecting the abnormal prion protein in brain tissue, not in blood. Prions accumulate in the central nervous system and cause characteristic changes best seen after death through tests on brain samples—such as immunohistochemistry or Western blot—which confirms infection. Antemortem blood tests have not been validated as reliable or definitive for BSE because prions do not provoke a consistent, detectable antibody response, and blood-based biomarkers lack the specificity and sensitivity required to distinguish BSE from other conditions. Therefore, a blood test cannot reliably determine BSE status or definitively diagnose BSE, making the statement that BSE status can be determined with a blood test incorrect.