Infective arthritis, also known as septic arthritis, is a painful condition characterized by inflammation of a joint due to an infection, usually bacterial. It can lead to joint damage and disability if not diagnosed and treated promptly. The infection may spread through the bloodstream or direct penetration, such as through trauma or surgery. Identifying the causative organism is crucial for effective treatment and management.

Several factors increase the risk of developing infective arthritis, including existing joint problems like osteoarthritis or rheumatoid arthritis, recent joint surgery or injections, and compromised immune systems due to conditions such as diabetes or HIV. Additionally, intravenous drug use and various skin infections can also facilitate the introduction of pathogens into the joint space. Age is another risk factor, as older adults are more susceptible to infections.

The symptoms of infective arthritis typically include sudden onset of severe joint pain, swelling, warmth, and redness, often accompanied by fever and chills. Affected joints may exhibit limited range of motion and stiffness, especially after periods of inactivity. Symptoms may vary based on the infectious agent and the duration of the infection, making prompt recognition and treatment vital.

Infective arthritis, also known as septic arthritis, is primarily caused by the invasion of infectious agents such as bacteria, viruses, or fungi into a joint. The most common causative organism is Staphylococcus aureus, but other pathogens, including Streptococcus species and Neisseria gonorrhoeae, can also be responsible, particularly in sexually active adults. Risk factors for developing infective arthritis include existing joint conditions, recent joint injections, diabetes, immunosuppressive conditions, and intravenous drug use, which can increase susceptibility to infections.

Diagnosis of infective arthritis involves a comprehensive evaluation, including a detailed medical history, physical examination, and imaging studies like X-rays or MRI to assess joint damage. Laboratory tests, particularly synovial fluid analysis obtained via aspiration, play a crucial role in identifying the causative pathogen and determining the presence of white blood cells, which indicates inflammation or infection. Blood cultures may also be performed to detect systemic infections.

The treatment of infective arthritis typically involves the prompt administration of systemic antibiotics, the choice of which is guided by the specific pathogen identified through joint fluid analysis. In severe cases, surgical intervention may be necessary to drain the infected joint and relieve pressure. Supportive care, including pain management and physical therapy, is also important in facilitating recovery and improving joint function following infection.

Preventing infective arthritis necessitates maintaining good overall health and managing chronic conditions properly. Avoiding unnecessary joint procedures, practicing safe injection techniques, and promptly treating skin infections can reduce risk. Vaccination against certain pathogens, such as Streptococcus pneumoniae and Neisseria meningitidis, can also help prevent infections that could potentially lead to arthritis. Regular medical check-ups and attention to joint health are paramount for individuals at higher risk.