M00.162

Clinical Causes: Infection with Streptococcus pneumoniae bacteria, often spreading from a nearby or distant infection site Bacterial entry into the bloodstream, which can occur due to pneumonia, sinusitis, or meningitis Compromised immune system that makes it easier for bacteria to invade the joint Pre-existing joint conditions or injury that may make the joint more susceptible Invasive procedures or joint injections that may inadvertently introduce bacteria

Key Symptoms: Sudden onset of joint pain and tenderness in the left knee Swelling and warmth around the affected joint Reduced range of motion and stiffness Fever and chills that may accompany joint symptoms General feeling of malaise or fatigue Possible redness over the joint area

Diagnosis Path: Diagnosis of pneumococcal arthritis typically involves a combination of medical history assessment, physical examination, and laboratory tests. Blood cultures and joint fluid analysis are crucial to identify Streptococcus pneumoniae. Imaging studies such as X-rays may be used to evaluate joint damage, although they are not definitive for infection. Synovial fluid analysis can reveal the presence of bacteria and elevated white blood cell counts, confirming the diagnosis.

Treatment Protocols: Treatment primarily involves prompt administration of antibiotics effective against Streptococcus pneumoniae, usually given intravenously at first, followed by oral antibiotics for an extended period. Additionally, joint drainage may be necessary to remove infected fluid and reduce pressure. Supportive measures include rest, ice application, and pain management. In cases of joint damage or severe infection, surgical intervention such as joint debridement or even joint replacement might be considered. Early and aggressive treatment is essential to prevent joint destruction and systemic complications.