PARIS, Feb 1 (Reuters) - All of France's regional health authorities will visit all the facilities run by French care homes company Orpea - at the centre of allegations of mistreatment - government minister Brigitte Bourguignon told France Inter radio.

On Sunday, Orpea dismissed its director general Yves Le Masne, amid claims of resident mistreatment made in a book, and appointed current non-executive chairman, Philippe Charrier, as its new chief executive officer.

Orpea's shares lost about half of their value last week after the publication of extracts of a book accusing the company of mistreatment on the elderly were published in a newspaper. The company has denied the accusations. (Reporting by Benoit Van Overstraeten; Editing by Sudip Kar-Gupta)