Acute group G streptococcal myositis associated with streptococcal toxic shock syndrome: case report and review.

The group G streptococcus (GGS) is a rare cause of deep soft-tissue infection. We report that we believe is the first case of acute diffuse GGS myositis in association with toxic shock. Although the causative organism did not contain the genes for group A streptococcal pyrogenic exotoxins (SPEs) or make SPEs, the organism produced at least one new toxin that shared the biologic properties of the SPEs.