Antistreptolysin O

Label Mnemonic:	ASO
Epic code:	LAB688
Downtime form:	Doctor/Provider Orders - Pathology Core and Specialty Care Nursery

Commercial Mailout Laboratory
6240-8 RCP
356-8593

Specimen(s):

Serum

Specimen Instructions:

Separate serum from cells as soon as possible.

Collection Medium:

Red top tube 5 mL (Clot Activator)

Minimum:

Preferred Minimum: 1 mL serum in a red top tube
Absolute Minimum: 0.4 mL serum in a red top tube

Rejection Criteria:

Heparinized plasma. Hemolyzed specimens.

Delivery Instructions:

Submit specimen to laboratory as soon as possible after collection.

Turn Around Time:

Within 24 hours upon receipt at reference laboratory

Reference Range:

0-1 year: 0-200 IU/mL
2-12 years: 0-240 IU/mL
13 years and older: 0-330 IU/mL

Comments:

Use of antistreptolysin O (ASO) for the diagnosis of acute group A streptococcal infection is rarely indicated. False negative results are common. Dnase B Antibody(LAB3020) is the recommended adjunct test for patients with suspected non-purulent complications of Group A streptococcal infection.

Methodology:

Quantitative Nephelometry

CPT Code:

86060