Antistreptolysin O (ASO) Reagent is used for the qualitative and semi‐ quantitative measurement of antibodies to streptococcal exoenzymes in human serum.
Number of Tests:
100 tests
Testing Procedure:
Manual
Storage Temperature:
2‐8°C
Qualitative Test:
Positive: Any observable agglutination in the reaction mixture
Negative: Uniform milky suspension with no agglutination
Expected Values:
Normal values can vary with age, season of the year and geographical area. The upper
limit of normal ASO titers for preschool children is <100 IU/mL and in school age children
or young adults is usually 166‐250 IU/mL. The average can be established at <200 IU/mL.
Limitations of Procedure:
Results should be read two minutes after the mixing of the reagent on the slide. A
reading obtained after this period of time may be incorrect.
Existence of prozone at high titers has not been encountered.