Egyptian boys play with ducks in the village of Ezbet Sidi Omer, near Cairo March 6, 2006. Health officials say the cultural practice of keeping birds at home, often in secret, is aiding the spread of bird flu in the most populous Arab country, where 24 people have contracted the disease since it emerged in Egyptian poultry a year ago. Picture taken on March 6, 2006. To match feature BIRDFLU-EGYPT/