<prompt> True statement about antistreptolysin O titre is :In normal people the titre is 200In acute glomerulonephritis the titre is lowASO titre 200 indicate rheumatic feverIt is poorly antigenic  <response>: ASO Anti Streptolysin O titre :Estimation of antibody against streptolysin is a standard serological test for retrospective diagnosis of streptococcal infectionASO titre 200 are indicative of prior streptococcal infectionRaised after throat infection onlyIn acute glomerulonephritis the titre is low 