A French woman has filed a complaint against a baby formula manufacturer after her infant daughter allegedly vomited a parasitic worm the length of an adult index finger, police said Wednesday.

The incident came after another family allegedly found a living larva in a container of the same milk powder brand, Gallia, manufactured by French firm Danone.

Police in the northern region of Brittany told AFP the mother of a three-month-old child came in on Tuesday to file a complaint.