Osteomyelitis - Types, Causes, Symptoms, and Treatment

What Is Osteomyelitis?

Osteomyelitis occurs when bacteria or fungi enter your bone either through the bloodstream, from nearby infected tissue, or directly after an injury that exposes the bone. Sometimes, even procedures like dental surgeries or injections can introduce these germs into your bloodstream, allowing them to reach the bone.

In the past, osteomyelitis was considered incurable. But with medical advances, it can now be treated successfully. Most patients need surgery to remove dead or infected bone tissue, followed by a course of intravenous antibiotics to clear the infection fully.

What Are the Causes of Osteomyelitis?

This condition typically begins when bacteria from an infected wound or tissue enter the bloodstream and travel to the bone. The most common bacteria are Staphylococcus aureus, but a tougher strain called MRSA (methicillin-resistant Staphylococcus aureus) has become a growing concern because it resists many standard antibiotics. In some cases, fungi or other microorganisms can also cause bone infections.

What Are the Types of Osteomyelitis?

The different types of osteomyelitis include:

• Acute Osteomyelitis: This type of osteomyelitis starts suddenly. You may have a fever first, followed by pain and tenderness in the infected area within a few days.

• Chronic Osteomyelitis: The symptoms of chronic osteomyelitis are hard to treat and may last a long time. People often have ongoing bone pain and pus that keeps draining. In some rare cases, the symptoms are not noticeable, and the infection can go unnoticed for months or even years.

• Vertebral Osteomyelitis: This type of osteomyelitis affects the spine and causes long-lasting back pain that worsens with movement. It is more common in people who use drugs or undergo dialysis.

• Prosthetic Joint Osteomyelitis: This happens when bacteria infect an artificial joint, causing swelling, loosening of the joint, pain, and difficulty moving.

What Are the Symptoms of Osteomyelitis?

Signs and symptoms of osteomyelitis vary among individuals and depend on the underlying cause of the condition. Not everyone with osteomyelitis will experience symptoms; some may have it for years without any symptoms.

Common osteomyelitis symptoms include -

• Fever.

• An overall sense of illness or discomfort.

• Bone discomfort.

• Chills.

• Sweating.

• Vomiting and nausea.

• Skin discolouration.

• Irritation, or swelling.

• A warm or heated sensation on your skin.

• Pus or discharge (if the infection is close to a surgical site or wound).

• Restricted movement.

• Lower back pain (vertebral osteomyelitis).

• In severe cases, the infection can spread throughout the body, causing sepsis (a life-threatening condition due to the body’s response to an infection) or confusion.

Who Is More Prone to Developing Osteomyelitis?

Osteomyelitis can affect people of any age or gender. However, some groups are at higher risk, such as smokers, infants, older adults, and people with long-term illnesses like diabetes or kidney failure.

Diabetic patients often develop osteomyelitis from non-healing foot ulcers. In children, the infection usually affects the long bones, while in adults, it commonly involves the spine.

Other people at risk include:

• Those with prosthetic joints or metal implants (like hip replacements).

• People with blood infections or blood disorders, such as sickle cell anemia.

• Those with pressure sores or bedsores.

• People who have recently had bone injuries, fractures, or surgery.

• Intravenous drug users who use unclean needles.

• People with weakened immune systems.

How Is Osteomyelitis Diagnosed?

After checking your symptoms and doing a physical exam, your doctor may use the following tests to confirm the diagnosis of osteomyelitis:

1. Blood Tests: A complete blood count (CBC) and blood culture help find signs of infection. The CBC checks for inflammation and changes in blood cells, while the blood culture looks for bacteria in the bloodstream.

2. Imaging Tests: X-rays, MRI (magnetic resonance imaging), or CT (computed tomography) scans help show changes in the bone. The infected bone may look swollen or show areas of dead and new bone, often described as an “onion peel appearance.” MRI and CT scans can detect infection early and give a clearer picture.

3. Biopsy: A small sample of bone, tissue, or fluid is taken with a needle to confirm the infection and identify the germ causing it.

4. Molecular Tests: A PCR (polymerase chain reaction) test can detect specific bacteria or fungi when the cause is hard to find through other tests.

What Is the Treatment for Osteomyelitis?

If you have osteomyelitis, your doctor will treat it with antibiotics and, in some cases, surgery to clear the infection and promote your bone's healing. The osteomyelitis treatment includes the following -

1. Antibiotics: You will usually get strong antibiotics through a vein (IV) for several weeks. Your doctor will choose the right medicine based on the germ causing your infection.

2. Surgery: If your infection is severe or long-lasting, you may need surgery. During surgery, your doctor removes infected or dead bone tissue and drains any pus or abscess. In some cases, another procedure may be done later to rebuild and strengthen your bone.

3. Hyperbaric Oxygen Therapy: Your doctor may also suggest hyperbaric oxygen therapy. This helps increase blood flow and oxygen levels and speeds up healing in the infected area.

4. Wound Management: Taking good care of your wound and managing health conditions, like diabetes, is very important. Proper care helps your body heal faster and prevents the infection from coming back.

What Are the Complications of Osteomyelitis?

The complications of osteomyelitis include -

1. Formation of Abscess: If you have chronic osteomyelitis, the infection can spread from your bone to the nearby muscles or soft tissues, forming a pocket of pus called an abscess. These abscesses can return even after treatment. In rare cases, repeated drainage may slightly raise your risk of skin problems later.

2. Bone Death: When the infection causes too much swelling, it can block the blood flow to your bone. Without enough blood supply, parts of your bone may die.

3. Stunted Growth: If you are a child and the infection affects the long bones in your arms or legs, it can slow or stop your bone growth.

4. Systemic Spread: If osteomyelitis is left untreated, the infection can spread through your bloodstream and lead to sepsis, a serious, life-threatening condition.

How Can Osteomyelitis Be Prevented?

If you are at a higher risk of getting osteomyelitis, it’s important to talk to your doctor about ways to protect yourself. Preventing infections is the best way to lower your chances of developing a bone infection.

Here are some steps you can take:

1. Clean Wounds Right Away: If you get a cut, scratch, or bite, wash it well with clean water and soap to stop germs from entering your body.

2. Keep Good Hygiene: Wash your hands regularly and keep your skin clean to avoid infections.

3. Control Your Blood Sugar: If you have diabetes, keep your blood sugar under control. This helps your body heal faster and reduces your risk of foot ulcers that can lead to bone infection.

4. Use Clean Medical Practices: Make sure sterile techniques are used during any medical or surgical procedure.

5. Seek Early Treatment: If you observe any signs of infection, such as redness, swelling, or pain, see your doctor as soon as possible.

Conclusion:

Osteomyelitis happens when bacteria or fungi infect your bone, often through an injury, surgery, frequent injections, or the use of an artificial joint. The symptoms include fever, chills, bone pain, and so on. The treatment most often includes surgery followed by medications to help heal the bone. The prognosis is good if the condition is diagnosed and treated early. If you experience any symptoms that resemble osteomyelitis, consult an orthopedic surgeon promptly to begin treatment and improve your prognosis.

Key Takeaways:

• Osteomyelitis is an infection of the bone caused by bacterial or fungal infection, resulting in swelling of the bone marrow.

• Doctors diagnose it by physical examination and various diagnostic tests, which include blood tests, imaging tests, and a bone biopsy.

• Treatment often involves the removal of the dead bone, followed by the administration of antibiotics.