PMID- 23462619 OWN - NLM STAT- MEDLINE DCOM- 20130802 LR - 20220317 IS - 1940-087X (Electronic) IS - 1940-087X (Linking) IP - 72 DP - 2013 Feb 19 TI - The Citrobacter rodentium mouse model: studying pathogen and host contributions to infectious colitis. PG - e50222 LID - 10.3791/50222 [doi] LID - 50222 AB - This protocol outlines the steps required to produce a robust model of infectious disease and colitis, as well as the methods used to characterize Citrobacter rodentium infection in mice. C. rodentium is a gram negative, murine specific bacterial pathogen that is closely related to the clinically important human pathogens enteropathogenic E. coli and enterohemorrhagic E. coli. Upon infection with C. rodentium, immunocompetent mice suffer from modest and transient weight loss and diarrhea. Histologically, intestinal crypt elongation, immune cell infiltration, and goblet cell depletion are observed. Clearance of infection is achieved after 3 to 4 weeks. Measurement of intestinal epithelial barrier integrity, bacterial load, and histological damage at different time points after infection, allow the characterization of mouse strains susceptible to infection. The virulence mechanisms by which bacterial pathogens colonize the intestinal tract of their hosts, as well as specific host responses that defend against such infections are poorly understood. Therefore the C. rodentium model of enteric bacterial infection serves as a valuable tool to aid in our understanding of these processes. Enteric bacteria have also been linked to Inflammatory Bowel Diseases (IBDs). It has been hypothesized that the maladaptive chronic inflammatory responses seen in IBD patients develop in genetically susceptible individuals following abnormal exposure of the intestinal mucosal immune system to enteric bacteria. Therefore, the study of models of infectious colitis offers significant potential for defining potentially pathogenic host responses to enteric bacteria. C. rodentium induced colitis is one such rare model that allows for the analysis of host responses to enteric bacteria, furthering our understanding of potential mechanisms of IBD pathogenesis; essential in the development of novel preventative and therapeutic treatments. FAU - Bhinder, Ganive AU - Bhinder G AD - Division of Gastroenterology, BC Children's Hospital, Canada. FAU - Sham, Ho Pan AU - Sham HP FAU - Chan, Justin M AU - Chan JM FAU - Morampudi, Vijay AU - Morampudi V FAU - Jacobson, Kevan AU - Jacobson K FAU - Vallance, Bruce A AU - Vallance BA LA - eng GR - Canadian Institutes of Health Research/Canada PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Video-Audio Media DEP - 20130219 PL - United States TA - J Vis Exp JT - Journal of visualized experiments : JoVE JID - 101313252 SB - IM MH - Animals MH - Citrobacter rodentium/*pathogenicity MH - Colitis/*microbiology MH - *Disease Models, Animal MH - Enterobacteriaceae Infections/*microbiology MH - Host-Pathogen Interactions MH - Mice MH - Virulence PMC - PMC3605715 EDAT- 2013/03/07 06:00 MHDA- 2013/08/03 06:00 PMCR- 2015/02/19 CRDT- 2013/03/07 06:00 PHST- 2013/03/07 06:00 [entrez] PHST- 2013/03/07 06:00 [pubmed] PHST- 2013/08/03 06:00 [medline] PHST- 2015/02/19 00:00 [pmc-release] AID - 50222 [pii] AID - 10.3791/50222 [doi] PST - epublish SO - J Vis Exp. 2013 Feb 19;(72):e50222. doi: 10.3791/50222.