ASOT

Pathology category

Microbiology - Virology

Code

ASOT

Referral code

Request form

ICE request form

Test information

A test to determine the antistreptolysin-O titre in serum. Measurement aids in the diagnosis of group A streptococcal infections. Tests performed in a UKAS Accredited Medical Laboratory No. 8873.

Guidelines

Pre-analytical

Please ensure the sample is transported to the laboratory as soon as possible. If delayed please refrigerate.

Reference range

Range of assay (ASOT) <200 to 3600IU/ml Anti-streptolysin titre (ASOT) <200 Insignificant titre Anti-streptolysin titre 200 Equivocal result Anti-streptolysin titre >200 Significant Range of assay (ASD) <100 to >1600IU/ml Antistreptodornase B (ASD) titres greater than 200 U/ml in adults and 300 U/ml in school age children are considered as significant.

Tube type

Tube type info

5ml gold top clotted SST / 1 x Paeds plain clotted microtainer

Special requirements

N/A

Minimum volume

5ml Adult. 400ul paeds

Assay frequency

Weekly

TAT Inpatient (urgent)

1 to 7 days

TAT Inpatient

1 to 7 days

TAT GP/Outpatient

1 to 7 days

Referral lab