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Test Code Billings Clinic: 7001 Antistreptolysin-O (ASO) Titer, Serum

Additional Codes

Ordering Mnemonic
MayoAccess: BCL358

Performing Laboratory

Billings Clinic Laboratory: Serology

Useful For

Immunochemical assay of ASO antibodies provides valuable information about recent streptococcal infections which is useful in establishing a diagnosis of acute rheumatic fever and post-streptococcal glomerulonephritis.

Methodology

Agglutination of Latex Particles Coated with Streptolysin-O

Specimen Requirements

Serum

  • Draw blood in a serum gel tube(s).
  • Spin down and send 1 mL of serum refrigerated.
  • Indicate serum on request form.
  • Label specimen appropriately (serum).

Storage/Stability

Specimen Type Temperature Time
Serum Refrigerated 8 days
  Frozen (preferred) 6 months

 

Reject Due To

  • Repeated freeze-thaw cycles
  • Plasma specimen
  • Hemolysis
  • Lipemia
  • Turbid serum

Reference Values

  • A titer of 200 IU/mL is regarded as the upper limit of normal in a healthy individual.
  • A normal titer for preschool children is <100 IU/mL.
  • Semiquantitative values are ± 15%.

Day(s) Test Set Up

Monday through Friday

Test Classification and CPT Coding

86060 - Antistreptolysin O, titer

LOINC Code Information

Reporting Name LOINC Code
ASO Titer 5371-0