<prompt> Most Commmon cause of chronic osteomyelitis ?Staphylococcus aureusStreptococcus pyogenesMycobacterium tuberculosisStaphylococcus epidermidis  <response>: Ans. is a i.e., Staphylococcus aureus Chronic osteomyelitis is nearly always a sequel to acute osteomyelitis. Occasionally infection is subacute or chronic from the begining. As with acute osteomyelitis, the most common causative organism is staphylococcus areus. 