<prompt> Streptococcal cell wall polysacharide cross reacts with?Myocardial muscleCardiac valueEndocardiumSynol fluid  <response>: Ans. is a i.e., Myocardial muscle Group A carbohydrate cell wall polysaccharide of gorup A streptococcus, i.e. streptococcus pyogenes cross reacts with myocardium. 