United Kingdom, Feb. 4 -- Claire Foy was infected by a "gross" parasite which stayed in her system for five years following a trip to Morocco.

The Crown star has opened up about her health battle revealing she became concerned after losing weight and consulted a doctor who told her she "had parasites" and she believes it all stemmed from a trip abroad.

During an appearance on the Table Manners with Jessie and Lennie Ware podcast, Claire, 41, explained: "Quite a few years ago, I had parasites. Gross ...

"I kept losing weight and I didn't know what was going on ...They the parasites] travel as a pair. I got told by the doctor, gross, absolutely rank. It's disgusting."

The actress went on to reveal the diagnosis prompted her to change he...