Summary
Recently, we described the severe combined immunodeficency (scid) mouse as a laboratory model forB. burgdorferi infection. Scid mice inoculated with the virulent low-passage tick isolateBorrelia burgdorferi ZS7 developed a severe pancarditis involving endocardium, myocardium and epicardium in the absence of functionalB- orT-cells. Soon after inoculation perivascular infiltration was observed, later diffuse infiltration of the interstitium of the subendocardial and subepicardial areas was seen. The infiltrate was mainly mononuclear and predominantly composed of Mac-1+ cells. Concomitantly, fibroblast proliferation and augmented collagen deposition occurred in the interstitium. This was associated with the presence ofB. burgdorferi organisms. The histopathological and ultrastructural findings observed in scid mice resemble those observed in human Lyme carditis. The data emphasize the suitability of the scid mouse as a model in which to study the role of the immune system in the pathogenesis of Lyme carditis.
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Zimmer, G., Schaible, U.E., Kramer, M.D. et al. Lyme carditis in immunodeficient mice during experimental infection ofBorrelia burgdorferi . Vichows Archiv A Pathol Anat 417, 129–135 (1990). https://doi.org/10.1007/BF02190530
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DOI: https://doi.org/10.1007/BF02190530