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Anti-streptolysin O titer

Aka: Anti-streptolysin O titer, Anti-streptococcus O titer, ASO Titer

Method
1. Latex agglutination test
2. Identifies serum Antibody to streptolysin O
  1. Group A Streptococcus Oxygen labile hemolysin
Mechanism
1. Sensitive for acute streptococcal infection
  1. Early Penicillin prevents ASO rise
2. Increases within one week of infection
3. Peaks 2-4 weeks after infection
Normal
1. Age 5-12 years: <333 I.U.
2. Young Adults: <200 I.U.
Increased
1. Streptococcus respiratory infection
2. Acute Rheumatic Fever (80%)
3. Acute Glomerulonephritis (95%)
  1. Membranoproliferative Glomerulonephritis (20%)
  2. Acute Poststreptococcal Glomerulonephritis (70%)

Family Practice Notebook

Patients should address specific medical concerns with their physicians.

Although access to this page is not restricted, the information found here is intended for use by medical providers.

This page was written by Scott Moses, MD, last revised on 10/21/2007 and last published on 5/14/2013.

This is one of 5887 pages in the Family Practice Notebook