Detect Post-Infection Immune Complications

Antistreptolysin O Titer (ASOT) Test

This test measures antibodies following a streptococcal infection, helping assess the risks of rheumatic fever, kidney issues, and joint complications after severe tonsillitis or sore throat.

Trusted medical contentUpdated: 04-09-2026Views: 56LHL-2020

About this service

A serological test to measure the concentration (titer) of Antistreptolysin O (ASO) antibodies in blood serum. Streptolysin O is an enzyme produced by Streptococcus pyogenes bacteria (Group A Streptococcus). This test is used as serological evidence of a previous infection with this bacteria and helps diagnose non-suppurative complications that follow it, such as rheumatic fever and post-streptococcal glomerulonephritis.

Conditions and notices

Fasting is not required

No need to fast: the analysis can be done at any time.

Timing: The result should be interpreted in light of clinical symptoms and medical history.

الزيادة في العيار: أخذ عينتين بفاصل أسبوعين لإثبات ارتفاع العيار أكثر دلالة من عينة واحدة

Frequently Asked Questions

Short answers to the FAQs published with this service.

• What does the ASOT test measure?

The ASOT test measures the concentration of antibodies against streptolysin O, which is an enzyme produced by Group A Streptococcus bacteria.

• What are the typical normal levels for the ASOT test?

Normal levels are generally below 200 IU/mL for adults and below 400 IU/mL for school-age children.

• Which symptoms might suggest a need for this test?

Symptoms include migratory pain and swelling in multiple joints, unexplained skin rashes, or involuntary movements.

• Is fasting required for the ASOT test?

No, fasting is not required for this laboratory blood test.

• Does a high ASOT result necessarily mean there is a current infection?

Not necessarily. An elevated ASOT result can reflect a previous streptococcal infection rather than an active infection at the time of testing.

Medical Laboratories

Detect Post-Infection Immune Complications

Antistreptolysin O Titer (ASOT) Test

This test measures antibodies following a streptococcal infection, helping assess the risks of rheumatic fever, kidney issues, and joint complications after severe tonsillitis or sore throat.

Trusted medical contentUpdated: 04-09-2026Views: 56LHL-2020

View service availability

Detect Post-Infection Immune Complications | Antistreptolysin O Titer (ASOT) Test

Home Service Available

Service typeLaboratory test (Blood)

Duration10-15 minutes

Fasting / preparationFasting is not required

Home serviceAvailable

Medical notice: this information is for education and service understanding. It is not a diagnosis or a recommendation for an unnecessary procedure.

About this service

What is included?

✓Anti-Streptomycin O (ASOT) Tit Report
✓Health guidance and counseling based on the result.
✓Personal support services from Lahalak

Conditions and notices

Fasting is not required
No need to fast: the analysis can be done at any time.
Timing: The result should be interpreted in light of clinical symptoms and medical history.
الزيادة في العيار: أخذ عينتين بفاصل أسبوعين لإثبات ارتفاع العيار أكثر دلالة من عينة واحدة

Frequently Asked Questions

Short answers to the FAQs published with this service.

• What does the ASOT test measure?

The ASOT test measures the concentration of antibodies against streptolysin O, which is an enzyme produced by Group A Streptococcus bacteria.

• What are the typical normal levels for the ASOT test?

Normal levels are generally below 200 IU/mL for adults and below 400 IU/mL for school-age children.

• Which symptoms might suggest a need for this test?

Symptoms include migratory pain and swelling in multiple joints, unexplained skin rashes, or involuntary movements.

• Is fasting required for the ASOT test?

No, fasting is not required for this laboratory blood test.

• Does a high ASOT result necessarily mean there is a current infection?

Not necessarily. An elevated ASOT result can reflect a previous streptococcal infection rather than an active infection at the time of testing.

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Important Notice:

Content on LahaLak is provided for educational purposes only. It is not a medical diagnosis, prescription, or substitute for consulting a qualified clinician. Medical decisions should not be made from this content alone.

Content reviewed according to the LahaLak Quality Charter.Editorial Policy & Medical Standards

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