The Anti-Streptolysin O (ASO) Qualitative test detects the presence of antibodies against streptolysin O, a toxin produced by Streptococcus bacteria. Elevated ASO levels are commonly associated with recent streptococcal infections, such as strep throat, scarlet fever, or skin infections. This test helps diagnose complications arising from these infections, including rheumatic fever or glomerulonephritis. The qualitative test determines whether the antibodies are present but does not measure their exact concentrati