(Adds details of the case) CAIRO, March 25 (Reuters) - A three-year-old Egyptian girl has contracted bird flu, the 27th case among humans in Egypt, the state news agency MENA said on Sunday. The girl, Hajer Mohamed Awadallah, was taken to hospital in the southern town of Aswan on Thursday and has tested positive for the deadly virus, it said, quoting the Ministry of Health. Thirteen Egyptians have died from the disease since the first outbreak in Egypt in February 2006, one of the highest death ratios for any country in the world. But the last death, of the 21st case, was on Feb. 15. The girl went to hospital with a high temperature and other symptoms of bird flu, MENA said. Because she had been in contact with domestic poultry, she received Tamiflu, the standard treatment for the symptoms of the disease, it added. "Her condition is stable and an epidemiological study is under way on all of her family," it said. Most of the deaths in Egypt have come about because the patients concealed their contacts with poultry, leading to delays in the start of Tamiflu treatment, health officials say. Out of the 27 cases in Egypt, 13 have died, 12 have recovered completely and two are under treatment, MENA said. Two other recent cases have occurred in the province of Aswan but the health ministry said they were not related.