The Chesapeake Bay Foundation says both humans and fish are paying a price for the pollution affecting the bay. A report by the Annapolis-based environmental group says incidents of infection and illness should be a call to government action. The foundation sued the Environmental Protection Agency in January, accusing the federal government of failing to enforce the Clean Water Act. Four years ago, a Crownsville man contracted a life-threatening blood infection after swimming near his house on a tributary of the Severn River. Bacteria and disease-causing organisms from animal or human waste pose another threat in bay waters, according to the report.