LONDON (Reuters) - A U.S.-French pharmaceutical company was at the heart of an investigation by British authorities on Sunday to try to find the source of an outbreak of highly infectious foot and mouth disease.A laboratory run by Merial Animal Health Ltd, jointly owned by U.S. drugmaker Merck & Co. Inc and France’s Sanofi-Aventis SA, was sealed off and under inspection along with a nearby government-funded laboratory.
