Have you or a friend suddenly developed severe pain, swelling, redness, and fever in a joint? Sometimes we may think it's just a sprain or something else. However, if you have these symptoms, it could be a serious condition called septic arthritis . So let's talk about this a little bit today, because it's very important to be aware of it.
What is septic arthritis? Let's understand it simply!
Simply put, septic arthritis is an inflammation or swelling that occurs when a germ enters one or more of your joints. This germ can be a bacteria, a virus, or a fungus. Most often, it occurs when an infection from somewhere else in the body travels to the joint through the bloodstream.
Think about it, our joints are like the joints of a machine. For them to work well, their surfaces need to be smooth. This smooth surface is called cartilage . Also, there is a lubricating oil called synovial fluid between the joints, which helps the joints move easily. So when that germ enters, it damages this cartilage and synovial fluid, which causes inflammation.
It usually affects larger joints like the hip and knee, but it can also affect other joints like the shoulder and ankle.
When most people think of "arthritis," they think of it as something that only affects older people. But in reality, people of any age can develop arthritis. Surprisingly, this type of arthritis, called septic arthritis , is more common in children than in adults.
Although we often think of the word "arthritis" as a single disease, there are actually several types of arthritis. For example:
- Osteoarthritis
- Rheumatoid Arthritis
- Psoriatic Arthritis
- Gout
Although all of these are related to inflammation of the joints, their causes, symptoms, and treatments are different. Septic arthritis is a specific type of arthritis caused by a bacterial infection .
Which joints are most commonly affected by septic arthritis?
This depends on a number of factors. In general, as mentioned earlier, it is most common in the large joints in the lower body, such as the hips, knees, and ankles.
- In young children , this most commonly affects the hip joint .
- For adults , it most commonly affects the knees .
- There are some special cases. For example, injection drug users are more likely to develop this in the sacroiliac joints, which connect the pelvis and lower back, and the sternoclavicular joint, which connects the clavicle to the sternum.
Can this septic arthritis spread to other parts of the body?
Yes, this is the most dangerous thing. If the infection that caused septic arthritis is not treated properly, the infection can spread to other parts of the body. We call this sepsis . This is a serious condition that can even be life-threatening .
Most often, septic arthritis affects only one joint. However, very rarely, it can affect multiple joints. Staphylococcal bacterial infections are the main cause of septic arthritis, and in such cases, it usually affects only one joint. However, septic arthritis caused by a type of bacteria called Neisseria can affect multiple joints.
Who is more likely to develop septic arthritis?
Although it is most common in children, it can also occur in adults. Boys between the ages of 2 and 3 are especially at risk of developing it.
How common is this?
Septic arthritis is not a very common disease. Roughly speaking, it occurs in between 2 and 6 out of 100,000 people per year.
How serious is septic arthritis?
Although it is not common, septic arthritis is a very serious condition . It can cause permanent damage to your affected joint, as well as other complications. If not treated properly , it can even lead to death . Therefore, if you have these symptoms, do not forget to see a doctor or go to the nearest hospital immediately.
What are the symptoms of septic arthritis?
These symptoms may appear suddenly:
- Severe pain and tenderness in the affected joint.
- That joint is swollen and feels warm .
- Difficulty moving the joint (limited movement).
- Reluctance to use or move the affected joint (this may be especially true in children).
- Fever .
If you have one or more of these symptoms, don't take it lightly.
What causes septic arthritis?
As mentioned earlier, the main cause of this is an infection. It can be bacteria, fungi, mycobacteria, viruses, or other pathogens. Most often, an infection that starts somewhere else in the body, perhaps in a skin wound, travels to the joint through the bloodstream.
These pathogens in particular can cause septic arthritis:
- Staphylococcus aureus : This bacteria (also known as 'Staph' for short) is the leading cause of septic arthritis in both children and adults.
- Methicillin-resistant Staphylococcus aureus (MRSA) : MRSA is a type of Staph infection that is resistant to some antibiotics. People who inject drugs, those infected with HIV (human immunodeficiency virus), and those with diabetes are at higher risk of developing septic arthritis due to MRSA.
- Group A and B Streptococci : This is also a type of bacteria. Older people, people with chronic diseases such as diabetes, and people with cirrhosis are at higher risk of developing septic arthritis from this bacteria.
- Neisseria gonorrhoeae : This bacterium causes the sexually transmitted infection (STI) called gonorrhea. People with gonorrhea can develop a type of septic arthritis called gonococcal arthritis .
- Neisseria meningitidis (meningococcus) : This bacterium causes meningitis, an inflammation of the membranes that cover the brain and spinal cord. Rarely, this bacterium can also cause septic arthritis.
What is the most common bacteria that causes septic arthritis?
Staphylococcus aureus is the most common cause of septic arthritis in both children and adults, accounting for between 37% and 56% of septic arthritis cases.
Is septic arthritis contagious?
No, septic arthritis is not spread directly from person to person . However, the bacteria that cause septic arthritis (e.g., `Staphylococcus aureus`, `MRSA`, `Neisseria gonorrhoeae`) can be spread from person to person through contact.
How is septic arthritis diagnosed?
Your doctor will first examine your joint. If septic arthritis is suspected, they will likely take a sample of synovial fluid from the affected joint using a needle. This is called an aspiration . The fluid is then sent for laboratory testing. If bacteria are found in the fluid, it is a definite diagnosis of septic arthritis.
What tests are used for diagnosis?
- Synovial fluid aspiration : As mentioned earlier, the doctor takes a sample of fluid from the joint with a thin needle to check for bacteria.
- Blood tests : Blood tests may be done to see if your body's immune system is responding to an infection, or to rule out other medical conditions.
- X-rays : X-rays are used to take pictures of the bones. An X-ray can show things like increased space between joints and swelling of soft tissues. These can be signs of septic arthritis.
- Ultrasound : Uses sound waves to take pictures of the inside of the body. An ultrasound can help the doctor see how swollen the joint is and where the joint fluid is when aspirating.
- MRI (Magnetic Resonance Imaging) : A test that uses a large magnet, radio waves, and a computer to make detailed pictures of organs and bones. An MRI can help detect septic arthritis early.
How is septic arthritis treated?
The following treatments are used for this:
- Surgery : In most cases, surgical debridement and intravenous antibiotics are required.
- Antibiotics : Every patient with septic arthritis should be treated with antibiotics. Your doctor may give you antibiotics either intravenously or as pills.
- Joint fluid drainage: The doctor may use a thin needle to remove (aspirate) excess fluid from the joint. This may need to be done several times during healing.
- Physical therapy : You will likely need physical therapy to restore function to the joint and prevent the muscles around the joint from weakening.
- Removal of an artificial joint : If you develop septic arthritis in a prosthetic joint, the prosthetic joint will likely be removed and replaced with a joint spacer made of antibiotic cement. After a few months, your doctor will reattach your prosthetic joint.
How long does it take for septic arthritis to heal?
The time it takes to fully recover depends on what germ caused the infection and your overall health. You may need to take antibiotics for several weeks. If the infection has damaged the joint and surrounding soft tissues, it may take longer for the joint to fully recover.
Does septic arthritis heal on its own?
No, not at all. Because septic arthritis is an infection, it does not heal on its own. Bacterial infections need to be treated with antibiotics. If you have symptoms of septic arthritis, you should see a doctor or go to the nearest hospital immediately. If left untreated, it can cause serious complications and be life-threatening.
What are the risk factors for developing septic arthritis?
These risk factors may differ for children and adults.
Risk factors for children:
- Age : Newborns are at higher risk of developing this because their immune systems are not as strong.
- Having Hemophilia : Hemophilia is an inherited blood clotting disorder. Children with this condition are at increased risk of developing septic arthritis.
- Having a weak immune system : Children who are immunocompromised due to conditions like sickle cell anemia and HIV are more likely to develop this.
- Chemotherapy : Because chemotherapy weakens the immune system, people receiving this treatment are more likely to develop septic arthritis.
Risk factors for adults:
- Age : Adults over 80 years of age are at higher risk of developing this.
- Having rheumatoid arthritis (RA) or osteoarthritis : People with these diseases that damage their joints are more likely to develop septic arthritis. Among people with rheumatoid arthritis, septic arthritis can develop in up to 70 out of 100,000 people per year.
- HIV (Human Immunodeficiency Virus) Infection : Because HIV weakens the immune system, there is a greater chance of developing infections and, through them, septic arthritis.
- Having Diabetes Mellitus : High blood sugar levels can weaken the immune system. People with diabetes who do not keep their blood sugar levels under control are at increased risk of developing infections and septic arthritis.
- Having a skin infection : Since septic arthritis usually starts with an infection elsewhere in the body, having a skin infection can lead to septic arthritis.
- Recent joint surgery : If you have recently had joint surgery, you are at higher risk of developing septic arthritis due to infection of the surgical wound.
- Having a prosthetic joint : Infections are more common in prosthetic joints than in natural joints. Having a prosthetic joint increases the risk of septic arthritis.
- Injection drug use : This increases the risk of septic arthritis because it allows harmful bacteria and other organisms to enter the body through the skin.
- Sexual activity : There is a risk of developing septic arthritis due to the bacteria (Neisseria gonorrhoeae), which causes the sexually transmitted infection (STI) called gonorrhea, especially through unprotected sex.
How do you avoid septic arthritis?
While not every case of septic arthritis can be prevented, there are some things you can do to try to prevent it from developing:
- Keep cuts and wounds from getting infected : If you have a cut or wound on your skin, keep it clean to prevent infection. If there are signs of infection, such as redness, warmth, or pus around the wound, see a doctor immediately.
- Manage your chronic conditions well : If you have a chronic condition like diabetes or AIDS (Acquired Immunodeficiency Syndrome), manage that condition as well as possible to stay healthy.
- Practice safe sex : Always use a condom or dental dam. Talk to your sexual partner about past relationships and history of sexually transmitted infections (STIs).
- Do not abuse drugs : Injecting illegal drugs can cause infections. Take only the medications prescribed by your doctor, as directed.
What is the prognosis of septic arthritis?
The outlook for this depends on several factors:
- What type of bacteria or organism caused your infection?
- How long your infection has been present.
- Your age and overall health.
Some types of bacteria, such as MRSA, are more challenging to treat than others. The longer septic arthritis lasts, the more likely it is that the affected joint will be damaged. People with weakened immune systems are also more likely to have the affected joint damaged.
Can Septic Arthritis be fatal?
Even with treatment with antibiotics, septic arthritis has a mortality rate of between 7% and 15% . If you have symptoms of septic arthritis, be sure to see a doctor or go to the nearest hospital as soon as possible.
What are the possible complications of Septic Arthritis?
Septic arthritis is a serious condition. Complications that can occur include:
- Chronic pain
- Osteomyelitis (bone inflammation)
- Death of bone tissue (osteonecrosis) (due to decreased blood supply)
- Leg length difference
- Sepsis (inflammation that spreads throughout the body)
- Death
When should I see a doctor?
If you have symptoms of septic arthritis, such as joint pain, fever, warmth, redness, tenderness, and difficulty moving the joint, see a doctor or go to the nearest hospital immediately. Septic arthritis is a serious condition that needs to be treated with antibiotics. If left untreated, it can be life-threatening.
What is the difference between Septic Arthritis and Osteomyelitis?
Osteomyelitis and septic arthritis are both rare but serious conditions. Osteomyelitis is an infection of the bone. Septic arthritis is an inflammation of the cartilage covering a joint and the synovial fluid that lubricates the joint. Both conditions are usually caused by the bacteria Staphylococcus aureus.
Because the symptoms of both are similar (such as pain in the affected area, tenderness, and swelling), it can be difficult to tell the two apart. Septic arthritis can also lead to osteomyelitis, and sometimes both can occur at the same time. If you have symptoms of either condition, go to the nearest hospital immediately. Both require medical attention. Your doctor will perform tests to determine the cause of your symptoms.
What is the difference between Septic Arthritis and Gout?
Gout is a common type of arthritis caused by crystals of uric acid. Septic arthritis is an inflammation of a joint caused by an infection.
Septic arthritis is a rare but serious complication of gout. The symptoms of both conditions (such as swelling and redness of the affected joint) can be similar, so it can be difficult to tell the two apart. If you have symptoms of gout and/or septic arthritis, see a doctor as soon as possible. Your doctor will ask you questions about your symptoms, refer you to the hospital if necessary, and perform tests to determine the cause of your symptoms.
Remember the most important thing (Take-Home Message)
Septic arthritis is a rare but very serious condition. The good news is that it can be treated . If you have symptoms such as severe pain, swelling, and difficulty moving a joint, go to the nearest hospital immediately. The sooner your doctor can diagnose the condition and start treatment, the sooner you can recover. Don't delay, because early treatment can save your joint and prevent serious complications.
` Septic Arthritis, joint inflammation, infection, bacteria, joint pain, swelling, fever
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