09/09/2026
TEST OF THE WEEK:
The Antistreptolysin O (ASO) test is a blood test that measures antibodies produced by your immune system after an infection with Group A Streptococcus (Strep).
Why is it important?
ASO can provide evidence of a recent streptococcal infection, especially when complications such as rheumatic fever or post streptococcal glomerulonephritis are being investigated.
What does an elevated ASO mean?
It may indicate a recent or past Strep infection. However, an elevated result does not necessarily mean you currently have an active infection.
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