Bat saliva shows promise for saving stroke victims By The Associated Press November 29, 2003 NASHVILLE - Last March, Margie McGregor pulled a pan of muffins out of the oven, and her right arm went limp. Her left leg gave out and she stumbled. She had suffered a massive stroke. Today, the 78-year-old woman is gardening and taking 2-mile walks without a hint of a limp. She says bat saliva saved her. McGregor was part of a study at St. Thomas Hospital and 17 other medical centers nationwide of a drug called Desmoteplase, a synthetic version of a substance found...