A man infected with Ebola traveled to Senegal, bringing to the country the first confirmed case of the dreaded disease that has hit four other West African nations and killed more than 1,500 people, the Ministry of Health said Friday. The infected person, a university student from Guinea, sought treatment at a hospital in Senegal’s capital, Dakar, on Tuesday but gave no indication he might have Ebola, Health Minister Awa Marie Coll Seck told reporters. The next day, an epidemiological surveillance team in Guinea alerted Senegalese authorities that they had lost track of a person who had had contact with sick people.