M60.0

Clinical Causes: Bacterial infections, most commonly caused by *Staphylococcus aureus* bacteria Skin wounds or cuts that introduce bacteria into the muscle tissue Infections spreading from nearby skin or soft tissue areas Poor hygiene or sanitation, increasing exposure risk Immunosuppression or underlying health conditions that weaken the immune system Insect bites or skin abrasions in tropical regions

Key Symptoms: Pain in affected muscle, often severe and worsening with movement Swelling and tenderness localized to the area of infection Fever and chills, indicating systemic infection Redness or warmth over the affected muscles Weakness in the affected limb or muscle group Fatigue and malaise in more advanced cases Possible development of a palpable abscess or pus-filled swelling

Diagnosis Path: Diagnosing infective myositis involves a combination of clinical evaluation and diagnostic tests. Healthcare providers typically perform a physical examination to assess signs of inflammation and tenderness. Imaging studies such as ultrasound or MRI may be used to visualize abscesses or muscle damage. Blood tests can reveal elevated white blood cell counts and markers of inflammation. In some cases, a sample of pus or tissue from the affected area is collected for microbiological analysis to identify the causative bacteria, guiding targeted treatment.

Treatment Protocols: Treatment for infective myositis primarily involves antibiotics to eliminate the bacterial infection. The choice of antibiotics depends on the bacteria identified and their sensitivities. In cases where an abscess has formed, surgical drainage might be necessary to remove pus and reduce pressure on the muscle. Supportive care includes rest, pain management, and hydration. Early intervention improves outcomes and reduces the risk of complications such as muscle necrosis or spread of infection to other tissues.