<prompt> Commonest cause of hematogenous osteomyelitis: March 2011StreptococcusStaph. aureusSalmonellaH. influenza  <response>: Ans. B: Staph. aureus Staphylococcus aureus is the commonest causative organism causing acute osteomyelitis Osteomyelitis: Earliest site of involvement in bone: Metaphysis Brodies abscess: A static cavity remains in bone, without fuher enlargement. Blood culture are positive in 65 of cases Periosteal reaction may be the radiological sign visible after 10 days MC cause of acute osteomyelitis: Staph. Aureus 