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Antistreptolysin O titreAntistreptolysin O titre (AS(L)O titre or AS(L)OT) - titre of (serum) antistreptolysin O antibodies; a blood test used to assist in the diagnosis of a streptococcal infection or indicate a past exposure to streptococci. Additional recommended knowledgeThe ASOT helps direct the antimicrobial treatment and is used to assist in the diagnosis of scarlet fever, rheumatic fever and post infectious glomerulonephritis. A positive test usually is >200 units/mL,[1] but normal ranges vary from laboratory to laboratory and by age.[2] The false negatives rate is 20-30%.[1] If a false negative is suspected then an anti-DNase B titre should be sought. False positives can result from liver disease and tuberculosis.[1] References
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This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Antistreptolysin_O_titre". A list of authors is available in Wikipedia. |