Pyomyositis.

[pyomyositis]

Pyomyositis is the primary infection of the skeletal muscle . It is common in the tropics , but is increasingly being reported worldwide . It can affect immunocompromised and immunocompetent individuals . Staphylococcus aureus is the most common causative organism . Muscle histology and its culture remain the gold standard for diagnosis . However , among noninvasive methods , MR imaging is highly sensitive and can image large areas of the body and detect subclinical involvement . Early diagnosis , institution of appropriate antibiotic therapy , and drainage of pus lead to favorable outcome .