A most common cause of nongonococcal septic arthritis is
Staphylococcus aureus is a Gram-positive, round-shaped bacterium that is a member of the Firmicutes, and it is a member of the normal flora of the body, frequently found in the nose, respiratory tract, and on the skin.
H.influenza
Staph-aureus
Pseudomonas
Streptococcus