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J Clin Microbiol. 1992 November; 30(11): 3016-3018

Experimental Borrelia burgdorferi infection of outbred mice.

Department of Microbiology, School of Pharmaceutical Sciences, University of Shizuoka, Japan.

ABSTRACT

Infectivity of Borrelia burgdorferi strain 297 in normal outbred ddY mice was examined. Strain 297 was inoculated intraperitoneally in 3-week-old outbred ddY mice. B. burgdorferi was routinely cultured from the heart and urinary bladder 5 to 84 days postinoculation. The combined isolation rate from both heart and urinary bladder was significantly higher than the rate from spleen, kidney, liver, urine, and blood samples. Three- and 10-week-old mice were infected with inocula of 10(4) and 10(5) or more, respectively. Passive transfer of undiluted and 10-fold-diluted anti-297 rabbit serum and active immunization of 50 to 100 micrograms of lyophilized whole cells completely protected mice from infection with B. burgdorferi. These results suggest that the outbred mouse is a convenient model for experimental infection with B. burgdorferi.