Yap told reporters on Thursday that the diseas-free zones would be tightly guarded to prevent the entry of diseases that could spoil production.
He said only by ensuring customers in other countries that the Philippines was free of the dreadful swine flu and other diseases could they become confident about the country's pork products.
http://newsinfo.inquirer.net/breakingnews/regions/view/20090508-203885/Livestock-disease-free-zones-eyed-in-Mindanao