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