NOT true about ASO titre:
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 9/e559,8th/566)
May be positive in normal people
Major jones criteria
May be negative in post strptococcal glomerulonephritis
May not be elevated even in presence of carditis
Cardiovascular system