Which bacteria are usually responsible for nongonococcal septic arthritis in adults

Which bacteria are usually responsible for nongonococcal septic arthritis in adults?

Overall causative pathogens are documented by culture in approximately 70% to 90% of septic arthritis patients and include:

S. aureus37%–65% (increasing rates of methicillin resistance)
Streptococci22% (group B more common in elderly and diabetics)
Gram-negative bacilli5%–20%
Polymicrobial<8%
Coagulase-negative Staphylococci4%
Culture-negative10%–20%
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