CHICAGO--(BUSINESS WIRE)--Fitch Ratings has affirmed the 'BBB-' rating on the following Maine Health and Higher Educational Facilities Authority (MHHEFA) bonds issued on behalf of MaineGeneral Health (MGH): --$288.8 million Series 2011. The Rating Outlook is Negative. SECURITY A pledge of gross revenues, mortgage on certain hospital property, and fully-funded debt service reserve will provide security for the bonds. As additional security, MGH also obtained a surety bond for $15 million secured