What does a 200 positive ASO titer mean?

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I understand your concern.

Antistreptolysin O (ASO) titer is a blood test to measure antibodies against streptolysin O, a substance produced by group A streptococcus bacteria. Antibodies are proteins our bodies produce when they detect harmful substances, such as bacteria.

The ASO test is primarily used to help determine whether a recent streptococcus infection with group A Streptococcus is the cause of glomerulonephritis, a form of kidney disease, or rheumatic fever in a person with signs and symptoms.

The test may be ordered by itself or along with an anti-DNase B (anti-deoxyribonuclease B), another test used to detect recent strep infections.

In most cases, streptococcus infections are identified and treated with antibiotics, and the infections resolve.

In cases where they do not cause identifiable symptoms and/or go untreated, however, complications (sequelae), namely rheumatic fever and glomerulonephritis, can develop in some people, especially young children. The test, therefore, is ordered if a person presents with symptoms suggesting rheumatic fever or glomerulonephritis and has had a recent history of sore throat or a confirmed streptococcal infection.

The ASO test is ordered when a person has symptoms that a health practitioner suspects may be due to an illness caused by a previous strep infection. It is ordered when the symptoms emerge, usually in the weeks following a sore throat or skin infection, when the bacteria are no longer present in the throat or on the skin.

Have an opinion with a cardiologist and a nephrologist.

I hope this has helped you.

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Thank you.