Marie-Louise Febronie Meilleur, who was deemed the world's oldest person and believed that hard work was the secret to a long life, has died. She was 117.

Meilleur, who had four great-great-great-grandchildren among her descendants, died Thursday at a nursing home in Corbeil, 250 miles north of Toronto, daughter Olive Therrien said.The exact cause of death was not immediately known. Therrien, 78, of Peterborough, Ontario, said her mother had been well until a blood clot lodged in her lung last week.

It was not clear if Meilleur ever realized she had been designated as the world's oldest person by the Guinness Book of Records. She was nearly blind and deaf.

Meilleur's death came one day after 118-year-old Felicia Young Cormier died in Crowley, La. Despite her reported age, Cormier lacked the official birth certificate required by Guinness to prove she was the world's oldest person.

Born Aug. 29, 1880, in Kamouraska, Quebec, Meilleur had 10 children from two marriages. The oldest, an 89-year-old daughter, lives in Barrie, Ontario.