Antistreptolysin O
Laboratory Tests
≈ ¥20-50
(≈ $3-7)
2 hr
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Description
Estimated cost for Antistreptolysin O at general public hospitals in China is about ¥15-40, and at Grade 3A hospitals about ¥20-50, varying by hospital tier and region.
Main Uses
The primary purpose of the ASO test is to help diagnose and monitor infections caused by group A Streptococcus bacteria. It is particularly useful in diagnosing acute rheumatic fever, post-streptococcal glomerulonephritis, and to confirm a recent streptococcal infection when symptoms are not clear or have subsided.
Normal Range
The normal range for the Anti-Streptolysin O (ASO) test is typically less than 200 IU/mL, though this can vary slightly depending on the laboratory and the specific method used.
Low Values - Possible Causes
Low values of ASO are generally not clinically significant. However, they may indicate: no recent streptococcal infection, effective treatment of a previous streptococcal infection, or an immune system that does not produce sufficient antibodies in response to the infection.
High Values - Possible Causes
High values of ASO can be caused by: recent streptococcal infection such as strep throat or scarlet fever, post-streptococcal glomerulonephritis, rheumatic fever, or other inflammatory conditions where the body has been exposed to Streptococcus bacteria.