A US aid worker infected with Ebola in Liberia has been identified as a family doctor from Massachusetts.

Dr Rick Sacra, 51, works at the same hospital as the two other infected Americans, who were both brought back for treatment and are now recovering. One of them, Nancy Writebol, said resources at the hospital were insufficient to protect workers. The outbreak has killed more than 1,900 people and infected at least 3,500 in five West African countries. There have been 3,500 confirmed or probable cases in Guinea, Sierra Leone and Liberia.

"The outbreaks are racing ahead of the control efforts in these countries," WHO chief Margaret Chan said.
One of the two Americans recovering from Ebola joined calls for more resources to stop the spread of the disease. Nancy Writebol told the Associated Press news agency charities alone cannot handle the response to the disease.
Mrs Writebol and her husband David said about 250 employees at the hospital where she and Dr Sacra worked used thousands of disposable protective suits each week, but it was not enough to protect those doing the initial screenings for Ebola in an emergency room.

Dr Sacra, 51, was not treating those infected with Ebola, but delivering babies and treating other patients. He had flown to Liberia shortly after Mrs Writebol and another aid worker were infected.




"We don't have enough personal protective safety equipment to adequately be able to safely diagnose if a patient has Ebola," David Writebol said, adding Ebola has "overwhelmed the supply chain".
      "They can't get equipment in because there aren't any regular flights coming in. Same thing with aid workers from the international community." Nurses in Liberia's largest hospital are on strike, refusing to return to work until they are issued with protective equipment.

Dr Sacra went into isolation after his temperature rose, but was well enough on Wednesday to be sending emails, a spokesperson for his aid organisation, SIM, said.


Ebola is only spread through close contact but there is no cure for the infection. The fatality rate for this outbreak has been almost 50%, according to the World Health Organization (WHO).

The director of the US Centers for Disease Control and Prevention (CDC) has called for the international community to step up its response, specifically a $490m (£298m) appeal from the WHO.

The US Agency for International Development (USAID) which has directed the US response, has airlifted medical emergency supplies, including chlorine and gloves, to Liberia.

"The window of opportunity to stop Ebola from spreading widely throughout Africa and becoming a global threat for years to come is closing, but it is not yet closed," Dr Tom Frieden, who recently returned from West Africa, said in a statement

"If the world takes the immediate steps - which are direct requests from the frontlines of the outbreak and the presidents of each country - we can still turn this around."