A 37-year-old woman has become the 13th person in Egypt to die of the H5N1 strain of bird flu.

Nadia Mohammed Abdel Hafez died in a hospital in Cairo early Friday. Health officials initially reported that her condition was stable and that she was being treated with the drug Tamiflu.

The woman raised poultry in her home in the province of Fayoum, south of Cairo, where a teenage girl died of bird flu earlier this month.

Health officials announced separately Friday that a five-year-old boy has tested positive for bird flu. He is the 22nd confirmed human case of bird flu in Egypt.

Egypt has become the largest cluster of human cases of bird flu outside of Asia, where the disease originated. Cases have been discovered in 19 of Egypt's 26 provinces.

Some information for this report was provided by AFP, AP and Reuters.