Acute osteomyelitis is most frequently caused by:
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: Shafer's textbook of oral pathology 7th edition page 493
Staphylococcus aureus
Staphylococcus albus
Staph. aureus + Staph. albus
None of the above