(44-20) 74 18 84 00 Fax (44-20) 74 18 84 16 E-mail: mail@emea. europa. eu http: / /www. emea. europa. eu ©EMEA 2007 Reproduction and/ or distribution of this document is authorised for non commercial purposes only provided the EMEA is acknowledged H. pylori contain enzymes called ureases that make it able to break down urea into carbon dioxide, which is then removed in the breath.