@misc{oai:repo.qst.go.jp:00068793, author = {Ikeda, Manabu and Kawano, Akihiro and Iritani, Riichirou and Kinoshita, Akiko and Watanabe, Kaori and Kokubo, Toshiaki and Matsushita, Satoru and 池田 学 and 河野 明広 and 入谷 理一郎 and 舘野 香里 and 小久保 年章 and 松下 悟}, month = {Dec}, note = {Clinically, soft feces and a decline of reproductive performance were observed in specific pathogen free C3H-scid mice in our SPF animal facility. Grossly, the ceca of these mice were smaller than those of normal mice and it's contents have decreased. Histopathologically, severe edema was observed in the cecal submucosa, and inflammatory cells such as neutrophils and mononuclear cells were infiltrated in the lamina propria and submucosa of the ceca and colon. Microbiologically, Clostridium difficile (C. difficile) were isolated from the cecal contents and toxin A was detected from the isolate, and not detected Salmonella spp., C. rodentium, P. aeruginosa, C. kutscheri, C. piliformis, mouse hepatitis virus by bacteriologically or serologically test. Colitis associated with C. difficile in gnotobiotic mice has been pathologically characterized by decreased cecal size, polymorphonuclear cell infiltration and edema of lamina propria in large intestine [Onderdonk et al]. And has reported that inflammatory edema of cecal submucosa occurred in mice monoassociated with moderately toxinogenic C. difficile strains [Vernet et al]. These pathological findings in this case resemble to those of mice described in these reports. From a cecal content in an affected mouse, C. difficile producing toxin A was isolated. Therefore, based on the pathological findings and the result of microbiological examination, our case was diagnosed as C. difficile-associated colitis in scid mice., The american college of veterinary pathologists 56th annual meeting}, title = {Colitis associated with Clostridium difficile in the specific pathogen free C3H-scid mice.}, year = {2005} }