Description
Why It’s Done:
The ASO Quantitative Test is used to detect a recent streptococcal infection that may have led to post-infectious complications, especially when the bacteria are no longer present in the throat or skin.
It is primarily used in the diagnosis of:
• Rheumatic fever
• Post-streptococcal glomerulonephritis (a kidney disorder)
• Scarlet fever (in some cases)
This test is not used to diagnose a current strep throat but is helpful when symptoms appear after the infection has resolved.
Symptoms that may lead to this test include:
• Joint pain or swelling
• Fever
• Skin rash
• Chest pain or heart murmur
• Blood in urine or facial swelling (suggesting kidney involvement)
Preparation:
• No special preparation is needed.
• A blood sample will be drawn from a vein in the arm.
• Inform your doctor about:
o Any symptoms you’re experiencing
o Any recent strep infections or antibiotic use
o Ongoing autoimmune or inflammatory conditions
