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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Intestinal colonization of laboratory rats with Oxalobacter formigenes.

Six strains of Oxalobacter formigenes (anaerobic oxalate-degrading bacteria) were examined for their ability to colonize the gastrointestinal tracts of adult laboratory rats. These rats did not harbor O. formigenes. Strain OxCR6, isolated from the cecal contents of a laboratory rat that was naturally colonized by oxalate-degrading bacteria, colonized the ceca and colons of adult rats fed a diet that contained 4.5% sodium oxalate. Five days after rats were inoculated intragastrically with 10(9) viable cells of strain OxCR6, oxalate degradation rates in cecal and colonic contents increased by 19 and 40 times, respectively. Viable counts of strain OxCR6 from these rats averaged 10(8)/g (dry weight) of cecal contents. Strain OxCR6 was not detected in the cecal contents of inoculated rats fed diets that contained less than 3.0% sodium oxalate. Strains of O. formigenes isolated from the cecal contents of swine, guinea pigs, and wild rats and from human feces also colonized the ceca of laboratory rats; a ruminal strain failed to colonize the rat cecum.[1]


  1. Intestinal colonization of laboratory rats with Oxalobacter formigenes. Daniel, S.L., Hartman, P.A., Allison, M.J. Appl. Environ. Microbiol. (1987) [Pubmed]
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