<prompt> Most common cause of chronic osteomyelitisStaphylococcus aureusStreptococcus pyogenesMycobacterium tuberculosisStaphylococcus epidermidis  <response>: Chronic osteomyelitis is nearly always a sequel to acute osteomyelitisOccasionally infection is subacute or chronic from the beginningAs with acute osteomyelitis, the most common causative organism is staphylococcus areusRefer: Mohindras Fundamentals of Ohopedics, 2nd edition, pg no. 283, 284 