This is the 2015 IDSA clinical practice guideline for diagnosing and treating native vertebral osteomyelitis in adults. It uses the GRADE system to answer 13 clinical questions spanning diagnosis, antimicrobial therapy, surgery, and follow-up. The focus is spontaneous (hematogenous) spine infection, not implant-associated or postprocedural infection.
The core decision rule: in a stable patient with suspected NVO, resist the urge to start antibiotics before you have a pathogen. Prior antibiotic exposure lowers image-guided biopsy yield, and NVO demands weeks of pathogen-directed therapy, so a guess up front can cost you the diagnosis.
The practical exception is the septic or neurologically compromised patient, where you treat and image immediately. A high-yield shortcut worth memorizing: a positive S. aureus blood culture plus compatible MRI can replace biopsy entirely, because S. aureus is the dominant pathogen in this monomicrobial disease.
The 6-week duration recommendation rests on a noninferiority RCT showing equivalence to 12 weeks (90.9% cure in both arms), which is why prolonged courses are now reserved for high-risk cases. Finally, do not chase imaging: worsening bone on MRI at 4–6 weeks with a clinically improving patient is expected, not failure.
This is the 2015 IDSA clinical practice guideline for diagnosing and treating native vertebral osteomyelitis in adults. It uses the GRADE system to answer 13 clinical questions spanning diagnosis, antimicrobial therapy, surgery, and follow-up. The focus is spontaneous (hematogenous) spine infection, not implant-associated or postprocedural infection.
The core decision rule: in a stable patient with suspected NVO, resist the urge to start antibiotics before you have a pathogen. Prior antibiotic exposure lowers image-guided biopsy yield, and NVO demands weeks of pathogen-directed therapy, so a guess up front can cost you the diagnosis.
The practical exception is the septic or neurologically compromised patient, where you treat and image immediately. A high-yield shortcut worth memorizing: a positive S. aureus blood culture plus compatible MRI can replace biopsy entirely, because S. aureus is the dominant pathogen in this monomicrobial disease.
The 6-week duration recommendation rests on a noninferiority RCT showing equivalence to 12 weeks (90.9% cure in both arms), which is why prolonged courses are now reserved for high-risk cases. Finally, do not chase imaging: worsening bone on MRI at 4–6 weeks with a clinically improving patient is expected, not failure.