Group A Streptococcus is responsible for diseases such as glomerulonephritis, rheumatic fever
(causes joint pains), bacterial endocarditis, and scarlet fever
. The ASO level is usually less than 160 Todd units per milliliter. In your case the titer is high. In adults this has no significance unless there are specific symptoms related to streptococcal infection like sore throat, skin infections, heart symptoms or kidney symptoms.