Sign in →

Test Code ASOT Anti-Streptolysin O Titre (ASO Titre)

Laboratory Code

LAB219

Specimen Requirements

Specimen Type: Serum
Container/Tube: Gold Top (SSTII) / Red Top
Volume: 5.0 mL, 0.5 mL (Microtainer) / 6.0 mL
Minimum Volume: 0.5 mL serum

Specimen Stability

Specimen Type Serum                   
Ambient 12 hours
Refrigerate                      3 days
Frozen 7 days

Methodology

Latex Agglutination

Days and Times Performed

Monday through Friday, TAT 1 - 3 days

Specimen Condition

Haemolysis                          OK
Icterus OK
Lipaemia OK
Others                                                Not applicable

Reference Interval

< 200 IU/mL

Testing Laboratory

National University Hospital
Clinical Microbiology, 67724343

Useful For

Diagnosis of acute or recent Streptococcus pyogenes (Group A streptococcus) infection, in the work-up for suspected rheumatic fever or post-streptococcal-glomerulonephritis.

Service Code

23105

LOINC Code Information

25788-1

Update

Last updated 17/3/2025

Special Instruction

Paired sera is useful in demonstrating a rising titre. Submit acute and convalescent specimens 2 weeks apart.