streptolysin O


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Related to streptolysin O: streptolysin S, Streptococcus pyogenes, antistreptolysin titre

strep·tol·y·sin O

a hemolysin that is produced by β-hemolytic streptococci and is hemolytically active only in the reduced state; anti-streptolysin O produced during infection is of diagnostic significance.

streptolysin O

Streptolysin that is inactivated by oxygen.
See also: streptolysin