The Health Protection Agency said the latest case brings the total to 21. The patient, who is being treated at the University Hospital of North Staffordshire, is a man in his 70s.
Two patients being treated for the disease since the spate of illnesses began in the middle of July have died.
More top news
The 2017 Oscars will be remembered as the year the wrong film got the best picture award, but it wasn't the first memorable mix-up.
The family of a girl who died of an asthma attack after a GP turned her away, are speaking out after the doctor only got a written warning.
An ex-boyfriend murdered a couple after he searched on google for videos on getting revenge and the lengths of sentence for murder.