SAN FRANCISCO--(BUSINESS WIRE)--Fitch Ratings has upgraded the following revenue bonds issued on behalf of South Lake Hospital (SLH) to 'A-' from 'BBB+': --$51.2 million South Lake County Hospital District revenue bonds (South Lake Hospital, Inc.) series 2009A. The Rating Outlook is Stable. SECURITY The bonds are secured by gross revenues of SLH and a debt service reserve fund. KEY RATING DRIVERS IMPROVED FINANCIAL PROFILE: The upgrade to 'A-' from 'BBB+' reflects SLH's strengthened performance