M00.1

Clinical Causes: Infection with Streptococcus pneumoniae bacteria, usually spreading from other parts of the body such as the lungs or bloodstream. Spread through respiratory droplets or contact with infected individuals. Increased susceptibility due to weakened immune system, such as in the elderly, infants, or immunocompromised people.

Key Symptoms: Severe joint pain, often sudden in onset. Swelling, warmth, and redness in the affected joint(s). Limited movement or inability to use the affected joint comfortably. Fever and chills, indicating systemic infection. General feelings of malaise, fatigue, or weakness. In polyarthritis, multiple joints may show similar symptoms simultaneously.

Diagnosis Path: Medical history and physical examination to assess joint symptoms and overall health. Blood tests such as complete blood count (CBC) and blood cultures to detect infection and inflammation. Joint aspiration, where fluid is extracted from the affected joint for laboratory analysis to identify pneumococcal bacteria. Imaging studies like X-rays or ultrasound may be used to assess joint damage or swelling. Additional tests, including urine analysis or chest X-ray, might be performed to identify other sites of infection.

Treatment Protocols: Antibiotic therapy tailored to the specific bacteria, often requiring hospitalization for intravenous antibiotics. Supportive care for pain relief, such as nonsteroidal anti-inflammatory drugs (NSAIDs). Rest and immobilization of the affected joint(s) to reduce pain and inflammation. Monitoring and managing any complications or spread of infection to other parts of the body. In some cases, joint drainage or surgery may be necessary if abscesses or significant joint damage develop. Follow-up care to ensure complete eradication of the infection and assess joint recovery.