Specimen Requirements

Title

STREPTOLYSIN O ANTIBODIES (ASO)

Specimen Requirement

1 SST/1.0 mL serum (0.5 mL minimum). Centrifuge and refrigerate serum.

Methodology

Stability

Refrigerate: 8 days; Frozen: 2 weeks

Reference Range

By Report

Turnaround

1 day

Clinical Use

Document exposure to streptococcal streptolysin O. A marked rise in titer or a persistently elevated titer indicates that a Streptococcus infection or poststreptococcal sequelae are present. Concentrations of ASO antibodies are increased in 80-85% of patients with acute rheumatic fever.

Test Code

ASO