The state announced yesterday the five health plans that have been selected to serve as many as 115,000 low-income seniors in Ohio enrolled in both Medicaid and Medicare. The managed-care contracts are worth up to $3.7 billion in Medicaid business alone. State officials did not have cost estimates for the Medicare program. Aetna Better Health of Ohio, Molina Healthcare, UnitedHealthcare Community Plan of Ohio, Buckeye Community Health Plan Inc. and Caresource will manage care for "dual eligibles" in the Columbus, Cincinnati, Cleveland, Akron-Canton, Dayton, Toledo and Youngstown areas.