Ebola: US Doctor's Condition 'Deteriorates'

The condition of an American doctor who contracted the deadly Ebola virus in Liberia has deteriorated.

Dr Kent Brantly was working in West Africa tackling the deadly outbreak when he recognised his own symptoms and placed himself in isolation.

The 33-year-old father-of-two from Texas had been chatting to his doctors and working on his computer while receiving treatment.

Melissa Strickland, a spokesperson for the Samaritan's Purse charity that Dr Brantly was working for told Sky News: "Overnight, Dr Kent Brantly's condition deteriorated, but we are still classifying him as stable.

"He continues to receive intensive medical care."

Dr Brantly is a medical director for the organisation and had been involved in the treatment of many local patients during his time in Liberia.

A second US citizen, health worker Nancy Writebol, has also tested positive for Ebola and is also receiving treatment.

She was working in a support role with the medical teams. Her condition is serious but stable.

Ms Strickland said: "There are currently no more identified cases of Ebola among our team."

The disease has killed at least 672 people in four West African countries since the outbreak began earlier this year in Guinea and spread to Liberia and Sierra Leone.

Nigeria's airports and ports are on red alert following the death of a man from Liberia who was carrying the virus. It was the first case in Africa's most populous country.

He vomited and had a high fever on board a passenger plane, and was immediately quarantined upon arrival in the capital Lagos.

He died in hospital on Friday.

There is currently no cure or vaccine for Ebola and symptoms can often appear similar to those associated with malaria.