Anti-strepto-lysin O titer
(ASO)

Sample type:

Serum.

Test use:

Document exposure to streptococcal streptolysin O. A marked rise in titer or a persistently elevated titer indicates that a Streptococcus infection or pos tstreptococcal sequelae are present.

Precautions:

You may be instructed not to eat (fast) six hours before the test Interfering factors:

1) An increased titer can occur in healthy carriers.

2) Antibiotic therapy suppress streptococcus anibody.

3) Increased B-lipoprotiens levels inhibit streptolysin O and produce falsely high ASOT titer.

Pre analytical errors:

1) Drawing the sample in EDTA.

2) Transportation.

Post analytical errors:

1) Delayed report.

2) You may be instructed not to eat (fast) six hours before the test

Corrective actions:

Rejecting any sample with anticoagulant.