What should you know about gram negative osteomyelitis?

Osteomyelitis can affect bone after bacteria enter through an injury, surgery, nearby tissue or the bloodstream. Gram-negative describes a group of bacteria identified by laboratory testing; it is not a symptom that can be confirmed from pain alone. Possible features include deep, persistent pain, warmth, swelling, drainage from a wound and fever, although symptoms vary with the bone involved and whether infection is sudden or longstanding. Testing may include blood work, imaging and a sample from the affected area so treatment can match the organism.

Arrange medical review promptly if bone infection is suspected, particularly when there is a wound, recent operation, implanted material or ongoing drainage. Treatment may involve antibiotics selected after clinical and laboratory assessment, wound care and management of any underlying source. Some people need a procedure to remove infected or damaged tissue. [Bone Grafting](/treatments/trauma-and-fracture-care/bone-grafting/) may be considered later when infection has been controlled and bone repair is needed; it is not a substitute for treating active infection.

Seek urgent care for fever with worsening bone pain, confusion, faintness, rapidly spreading redness, severe weakness or a wound producing increasing pus. An infected surgical site, new drainage near an implant or inability to use the affected limb also needs prompt assessment. Do not stop prescribed antimicrobial treatment without speaking with the treating clinician.

How was the organism identified? Which tests show where the infection is? What is the treatment plan and how will response be monitored? Is surgery needed, and what would happen if infected tissue remains?