?:definition
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Serology reagents intended to detect antibodies to deoxyribonuclease streptolysin (both type S and O), an antigenic exotoxin produced mostly by certain strains of group A streptococci. These antibodies develop in response to or as the result of a preceding streptococcal infection and are associated with some autoimmune diseases such as rheumatic fever and Tourette\'s syndrome.
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