Spinal Infections (Including Spinal Tuberculosis)

Spinal infections involve the vertebrae, the discs between them, or the surrounding tissues, and fall broadly into two groups: pyogenic (bacterial) infection and spinal tuberculosis. Although they can be serious — and occasionally damage bone, cause deformity, or threaten the spinal cord — it is important to understand that the mainstay of treatment is medical. Antibiotics or, for tuberculosis, a prolonged course of anti-tubercular therapy successfully treat many patients without surgery. This page explains both kinds of infection and when surgery is required.

What it is

A pyogenic spinal infection is caused by bacteria reaching the spine, often through the bloodstream, leading to infection of the disc and adjacent vertebrae (spondylodiscitis) or of the vertebral bone itself. Spinal tuberculosis, sometimes called Pott’s spine, is tuberculosis affecting the spine; it tends to progress more slowly but can gradually destroy vertebrae and discs and lead to deformity, abscesses, or neurological problems.

In both, the infection can cause back pain, fever, and stiffness, and if it advances it may produce deformity, instability of the spine, or pressure on the spinal cord and nerves. Accurate diagnosis — distinguishing pyogenic from tuberculous infection and identifying the organism — is central, because it determines the correct treatment.

Who is a candidate? (Indications)

Assessment and treatment for a spinal infection are appropriate for patients with:

• Persistent back pain with fever, night pain, or unexplained weight loss
• Known or suspected tuberculosis with spinal symptoms
• Imaging suggesting destruction of vertebrae or discs, or an abscess
• Neurological symptoms such as leg weakness, numbness, or balance problems
• A spinal infection that is not responding to treatment already started

Most of these patients are treated medically; the smaller number who need surgery are identified through careful assessment.

How it is performed (diagnosis and treatment)

Care follows a clear sequence, with medical treatment at its centre:

1. Diagnosis combines the clinical picture with blood tests and imaging such as MRI.
2. A sample (biopsy) of the affected area is often taken to identify the organism.
3. Medical therapy is started — antibiotics for pyogenic infection, guided by the organism, or a prolonged course of anti-tubercular therapy over several months for spinal tuberculosis.
4. Supportive measures such as rest, bracing where appropriate, and pain management are added.
5. Monitoring with clinical review and repeat imaging tracks the response to treatment.

Surgery is introduced only where one of the specific indications below is present.

When surgery is needed

Surgery is reserved for specific problems rather than being the default treatment. It is considered when there is:

• A significant or progressing neurological deficit from pressure on the spinal cord or nerves
• Spinal deformity resulting from destruction of the vertebrae
• Instability of the spine
• A substantial abscess that needs drainage
• Infection that has failed to respond to medical therapy, or where a diagnostic sample is needed and cannot be obtained otherwise

Where surgery is required, it may involve clearing infected tissue, draining an abscess, decompressing the spinal cord, and stabilising the spine with instrumentation and bone graft. Spinal-cord monitoring is used where appropriate, and medical therapy continues alongside.

Benefits and risks

The benefit of prompt, appropriate treatment is to control the infection, relieve symptoms, and prevent complications such as deformity, instability, and neurological damage. Medical treatment avoids the risks of surgery but requires a prolonged, fully completed course of drugs. Where surgery is needed, it carries the risks of any major spinal operation — bleeding, injury to the spinal cord or nerves, further infection, implant problems, and the possibility of further surgery — weighed against the harm the infection itself is causing. The right balance is decided individually.

Alternatives

For most spinal infections, medical therapy is itself the primary treatment rather than an alternative to surgery. Within medical care, the choice and duration of drugs depend on the organism and the response. Where a patient is stable and improving, continued medical treatment with monitoring is appropriate; surgery is added only if a specific indication develops. A specialist assessment helps determine the right course for the individual.

Dr. Garg’s approach & experience

Dr. Garg is Principal Director & Head, Orthopaedics & Spine at Max Hospital, Delhi, and a former Professor at AIIMS New Delhi, with more than 325 peer-reviewed publications. Spinal infections, including spinal tuberculosis, are managed with medical therapy as the mainstay, and surgery reserved for neurological deficit, deformity, instability, abscess, or failed medical treatment.

Where infection has led to severe destruction and deformity, the reconstructive principles used in complex deformity surgery become relevant — an area in which Dr. Garg has particular experience, including the Modified Posterior Vertebral Column Resection technique for severe, rigid deformity. The emphasis throughout is on completing appropriate medical treatment and operating only when a clear indication is present.

When to seek a specialist opinion

A specialist assessment is appropriate for persistent back pain accompanied by fever, night pain, or unexplained weight loss, for known or suspected tuberculosis with spinal symptoms, or for a spinal infection that is not improving with treatment. Any spinal infection associated with leg weakness, numbness, balance problems, or changes in bladder or bowel function should be reviewed urgently.