<unk>  <unk>  or<unk>  is the antibody made against<unk>  O, an immunogenic, oxygen-labile streptococcal hemolytic exotoxin produced by most strains of group A and many strains of groups C and G Streptococcus bacteria. The "O" in the name stands for oxygen-labile; the other related toxin being oxygen-stable<unk> -S. The main function of<unk>  O is to cause hemolysis (the breaking open of red blood cells)—in particular, beta-hemolysis. Increased levels of<unk>  titre in the blood could cause damage to the heart and joints. In most cases, penicillin is used to treat patients with increased levels of<unk>  titre.
Anti-streptolysin O
Anti–Saccharomyces cerevisiae antibody
Heterophile antibody
Microantibody
Antisperm antibodies
Panel-reactive antibody
Anti-nuclear antibody
Anti-LKM antibody