A US hospital has isolated a patient who is showing signs of having the Ebola virus.

Texas Health Presbyterian Hospital Dallas said the patient's symptoms and travel history suggest they may have Ebola, the virus that has killed more than 3,000 people across West Africa.

The hospital expects to receive preliminary test results on Tuesday from the Centres for Disease Control and Prevention.

Presbyterian Hospital said it is taking measures to keep its doctors, staff and patients safe.

Hospital spokeswoman Candace White would not answer any questions about the patient or where the patient had visited.

The National Institutes of Health recently admitted an American doctor exposed to the virus while volunteering in Sierra Leone. Four other patients have been treated at hospitals in Georgia and Nebraska.

Presbyterian Hospital's statement said officials there were following CDC recommendations to keep doctors, staff and patients safe.

According to the CDC, Ebola symptoms can include fever, muscle pain, vomiting and bleeding, and can appear as long as 21 days after exposure to the virus.

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