<prompt> Causative organism of rheumatic fever ?Group A StreptococciStaphylococciGroup B StreptococciGroup D Streptococci  <response>: Ans. is a i.e., Group A StreptococciRheumatic fever :?Rheumatic fever RF is an acute, immunologically mediated, multisystem inflammatory disease classically occurring a few weeks after an episode of group A streptococcal pharyngitis; occasionally, RF can follow streptococcal infections at other sites, such as the skin. 