PROBLEM TO BE SOLVED: To provide a favorable model animal that is a pathological model animal of inflammatory disease such as atrophic gastritis and does not cause an early death and a method for evaluating and screening a substance for preventing or treating various inflammatory diseases or causing or promoting various inflammatory diseases, which uses the model animal.SOLUTION: The model animal of inflammatory disease is prepared by deleting or suppressing the function of &alpha 1,3-fucose transferase 9 gene. A substance for preventing or treating various inflammatory diseases or causing or promoting various inflammatory diseases is evaluated and screened by using the same.COPYRIGHT: (C)2010,JPO&INPIT【課題】萎縮性胃炎等の炎症性疾患の病態モデル動物であって、早期死亡のない、好適なモデル動物を提供するとともに、これを用いた各種炎症性疾患の予防、治療あるいは発症、促進物質の評価・スクリーニング方法を提供する。【課題解決手段】α1,3-フコース転移酵素9遺伝子の機能を欠損あるいは抑制させて、炎症性疾患モデル動物を作成し、これを用いて、各種炎症性疾患を予防、治療、あるいは発症、促進する物質の評価・及びスクリーニングを行う。【選択図】なし