An anti-streptolysin O enzyme inhibition test was performed…

An anti-streptolysin O enzyme inhibition test was performed on the serum of a 10-year-old female patient with the following results: no hemolysis in the 1:10, 1:20, 1:40, and 1:80 tubes; hemolysis in the 1:160, 1:320, and 1:640 tubes. What conclusion can you draw from these results?