The woman had been in intensive care in the western city of Bordeaux, where seven people are in hospital with E coli.
Officials said there was no link between the woman’s case and the virulent strain of enterohaemorrhagic E.coli (EHEC) which has caused around 50 deaths in recent
weeks across Europe, the majority in Germany.
The source of those infections is believed to have been organic vegetable sprouts.
The woman had been hospitalised with acute haemolytic uraemic syndrome (HUS), the killer kidney complication reported in a quarter of the cases in the current outbreak.
The source of the E coli strain which she contracted has not been identified, officials said.