<Li> Adults: less than 200 units </Li> <Li> Children: less than 400 units </Li> <P> This titre has a significance only if it is greatly elevated (> 200), or if a rise in titre can be demonstrated in paired blood samples taken days apart . The antibody levels begin to rise after 1 to 3 weeks of strep infection, peaks in 3 to 5 weeks and falls back to insignificant levels in 6 months . Values need to be correlated with a clinical diagnosis . </P> <P> It is done by serological methods like latex agglutination or slide agglutination . ELISA may be performed to detect the exact titre value . </P>

What is the significance of the detection of aso in serum