Anatomy Skeletal infections 4067621a Osteomyelitis of spine is caused by most common organism ? A Staphylococcus aureus B Pseudomonas C Tuberculosis D Streptococcus High-Yield Explanation Staphylococcus aureus , overall , worldwide staph. aureus is the commonest organism. in India tuberculosis is the commonest. ref : maheswari 9th ed