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Antistreptolysin O titer

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A blood test used to assist in the diagnosis of a streptococcal infection or indicate a past exposure to streptococci by measuring the antibodies produced against streptolysin O.


This test may be used to assist diagnosis of scarlet fever, rheumatic fever, and postinfectious glomerulonephritis.

Abbreviation: ASOT

See also: streptolysin O, antistreptolysin O.