Pathology Handbook

Anti-streptolysin O titre

Synonyms

ASO, ASOT

Clinical Indications

Possible streptococcal infection

Test Includes

Streptococcal serology (see also anti-DN'ase B)

Request Form

ICE request

Availability

On request during normal working hours; tests performed weekly, usually on Tuesdays

Specific Criteria

Please give detailed clinical information, including date of onset/contact with the suspected infection and details of any current, or intended, antibiotic therapy

Turnaround Time

6 working days

Specimen

Serum, red or gold top (SST) tube

Volume

5 ml

Container

Vacutainer red top

Collection

Samples should be transported to laboratory immediately

Causes for Rejection

Unlabelled / inadequately labelled sample

Reference Range

Antibody levels of less than or equal to 200 IU/ml in adults

Up to 300 IU/ml in school age children are regarded as normal

Lab Handling

Aliquot and store at 4ºC prior to processing. Serum stored at -40ºC for 3 months after testing