ANTI STREPTOLYSIN O (B)

Message

SEND OUT/BOSTON

Test Code

ASO

Alias/See Also

ASO

Preferred Specimen

SERUM GOLD TOP SST TUBE

Minimum Volume

2 MLS

Instructions

Send 2mL of serum. Use serum separator GOLD top. Centrifuge but do not pour OFF! Refrigerate.

Transport Container

ORIGINAL TUBE

Transport Temperature

REFRIGERATED

Specimen Stability

Room temperature: 2 days
Refrigerated (2-8°C): 2 days
Frozen (-20°C or colder): 6 months

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Unlabeled sample, improper temperature during transport. Wrong sample collection. Sample unspun before transport.

Methodology
Turbidimetric/Immunoturbidimetic

Setup Schedule

M-F

Report Available

TAT 1-2

Reference Range

0-200 IU/mL

Clinical Significance

This test is a sensitive test for recent streptococcal infection. A rise in ASO begins about one week after infection and peaks two to four weeks later. ASO levels do not rise with cutaneous infections. In the absence of complications or reinfection, the ASO level will fall to preinfection levels within 6 to 12 months. Over 80% of patients with acute rheumatic fever and 95% of patients with acute glomerulonephritis due to streptococci have elevated levels of ASO.

Performing Laboratory
Test performed at West Roxbury Chemistry Lab Contact: Jonathan Dryjowicz-Burek 857-203-5973

Additional Information
ANTI STREPTOLYSIN O

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.