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Antistreptolysin O titer - Results

Alternative Names

ASO titer; ASLO

Normal Values:

The ASO level is usually less than 160 Todd units per milliliter.

Normal value ranges may vary slightly among different laboratories. Talk to your doctor about the meaning of your specific test results.

What abnormal results mean:

Abnormal results may be due to:

Active streptococcal infection
Bacterial endocarditis
Post-streptococcal glomerulonephritis
Rheumatic fever
Scarlet fever

Blood test

Reviewed last on: 8/12/2008
Linda Vorvick, MD, Seattle Site Coordinator, Lecturer, Pathophysiology, MEDEX Northwest Division of Physician Assistant Studies, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

References

Gerber MA. Group A Streptococcus. In: Kliegman RM, Behrman RE, Jenson HB, Stanton BF. Nelson Textbook of Pediatrics. 18th ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 182.

Antistreptolysin O Titer. In: Ferri FF, ed. Ferri's Clinical Advisor 2008: Instant Diagnosis and Treatment. 1st ed. Philadelphia, Pa: Mosby Elsevier; 2008.

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