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Open Access Enterohepatic Lesions in SCID Mice Infected with Helicobacter bilis

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Helicobacter bilis is a recently identified species that colonizes the intestine and liver of mice. In immunocompetent mice, infections have been associated with mild hepatitis, and in immunocompromised mice, inflammatory bowel disease has been induced by intraperitoneal inoculation of the organism. We report inoculation of 6-week-old C. B-17 scid/scid mice by gastric gavage with approximately 107 H. bilis colony-forming units. Groups of mice were euthanized and necropsied 12, 24, and 36 weeks after inoculation. Mild to moderate proliferative typhlitis was evident in all mice at 12 and 36 weeks after inoculation and in most mice 24 weeks after inoculation. Mild to severe chronic active hepatitis was detected in 10 of 10 male mice and 3 of 10 female mice. These results indicate that H. bilis can cause moderate to severe enterohepatic disease in immunocompromised mice.

Document Type: Research Article

Affiliations: Department of Veterinary Pathobiology, University of Missouri, Columbia, Missouri

Publication date: 1998-08-01

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  • Comparative Medicine (CM), an international journal of comparative and experimental medicine, is the leading English-language publication in the field and is ranked by the Science Citation Index in the upper third of all scientific journals. The mission of CM is to disseminate high-quality, peer-reviewed information that expands biomedical knowledge and promotes human and animal health through the study of laboratory animal disease, animal models of disease, and basic biologic mechanisms related to disease in people and animals.

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