contiguous skin and soft-tissue infections or abscesses, or direct inoculationof bacteria intomusclewith or without vasoconstrictive materials [1, 2, 7, 8]. In intravenous drug abusers (IVDAs), impaired cellular and humoral immunity and defective bactericidal activities of neutrophils, as well as abnormal skin bacterial colonization due to repeated skin punctures and the accompanying introducti...