A 1955 graduate of the University of Montreal, Dr. Teasdale was one of Canada's first female surgeons. She met her future husband, Dr. Peiro Corti, in Montreal and accompanied him to observe missionary hospitals in Africa and India. In 1961 they began work in a 45-bed clinic in Gulu, Uganda, and over the years converted it into a large facility with surgical and pediatric wards and schools for nurses, laboratory technicians, health educators and physicians. Humanitarian work earned Dr. Teasdale the Order of Canada and Order of Quebec, and awards from Italy's most prestigious academic and cultural institution, the Accademia Nazionale dei Lincei, and the International Medical Women's Association.