<prompt> NOT true about ASO titre:May be positive in normal peopleMajor jones criteriaMay be negative in post strptococcal glomerulonephritisMay not be elevated even in presence of carditis  <response>: ASO titre may be positive due to streptococcal infection even in normal people.in some individuals with rheutamatic carditis ASO titre may not be elevated. In PSGN the titre of anti DNA se B antibody is elevated more commonly than ASLO. ref Robbins 9e559,8th566 