<prompt> Acute osteomyelitis is most frequently caused by:Staphylococcus aureusStaphylococcus albusStaph. aureus Staph. albusNone of the above  <response>: Acute osteomyelitis is usually a polymicrobial infection. Different types of organisms may be cultured from these lesions; the most common are Staphylococcus aureus and Staphylococcus albus, and various streptococci. Anaerobes such as Bacteroides, Porphyromonas or Prevotella species also predominate.Ref: Shafers textbook of oral pathology 7th edition page 493 