<prompt> Most common cause of non gonococcal septic ahritis is ?Staph aureusH. influenzaeStreptococcus pyogenesPneumococcus  <response>: Ans. is a i.e., Staph aureusStaphylococcus aureus is the most common cause of septic ahritis in all ages although group-B streptococcus is also a common cause in newborns.H. influenzae was a common cause of septic ahritis in children but has now become rare due to the routine use of the conjugate vaccine. In young sexually active adolescents and adults two bacteria are commonly implicated.Staph aureus non-gonococcal septic ahritisNeisseria gonorrheae vonococcal septic ahritis. 