The second American aid worker who contracted the Ebola virus in West Africa was expected to arrive in Atlanta on Tuesday in serious condition, while a New York hospital was testing a man with symptoms of the deadly disease. New York's Mount Sinai Hospital on Manhattan's Upper East Side said on Monday it was testing a man who traveled to a West African nation where Ebola has been reported. The man, who had a high fever and gastrointestinal symptoms, had been placed in strict isolation and was being screened to determine the cause of his symptoms. The New York patient added to concerns about the often fatal disease after two American healthcare workers contracted it in West Africa, where they had traveled to help fight the disease that has killed nearly 900 people since February. Missionary Nancy Writebol, 59, will fly on a medical aircraft from Liberia to be treated by infectious disease specialists in a special isolation ward at Emory University Hospital in Atlanta, accor