Primary Pyomyositis Due to Community-acquired Methicillin-resistant Staphylococcus aureus in a Child: A Case Report

Bacterial infection of skeletal muscles, termed pyomyositis is usually secondary to infection from an adjacent or remote source.Primary pyomyositis or "Tropical myositis" is uncommon and is often diagnosed late in purulent stage, causing delayed treatment with an increase in morbidity and mortality.We present a case of primary pyomyositis of thigh muscles due to community-acquired methicillin-resistant Staphylococcus aureus (ca-MRSA) in an 8-year-old immunocompetent female child who presented with fever, malaise, anemia, left hip/thigh pain, limp, and deformity with leukocytosis, elevated erythrocyte sedimentation rate (ESR), and C-reactive protein (CRP).Patient responded well after surgical drainage, debridement, and appropriate antibiotics.The objective of this report is to increase awareness about primary pyomyositis and highlight proper antibiotic selection in the era of ca-MRSA.