Effect of bacterial flora and mouse genotype (euthymic or athymic) on scrapie pathogenesis

Euthymic and athymic female BALB/c mice, reared under either germfree or defined flora conditions, were used to investigate the pathogenesis of scrapie after intracerebral or intraperitoneal inoculation. Time in days to onset of clinical signs (Stage I), to endstage (Stage II), and the time interval...

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Bibliographic Details
Published in:Journal of leukocyte biology 1986-11, Vol.40 (5), p.525-532
Main Authors: Wade, W.F., Dees, C., German, T.L., Marsh, R.F.
Format: Article
Language:English
Subjects:
Animals
athymic
Bacteria - immunology
Biological and medical sciences
Brain - microbiology
Experimental viral diseases and models
Germ-Free Life
germfree
Infectious diseases
Injections, Intraperitoneal
Injections, Intraventricular
Lymph Nodes - microbiology
Medical sciences
Mice
Mice, Inbred BALB C
Mice, Nude
Mononuclear Phagocyte System - immunology
scrapie
Scrapie - immunology
Scrapie - microbiology
Spleen - microbiology
Time Factors
Viral diseases
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Summary:Euthymic and athymic female BALB/c mice, reared under either germfree or defined flora conditions, were used to investigate the pathogenesis of scrapie after intracerebral or intraperitoneal inoculation. Time in days to onset of clinical signs (Stage I), to endstage (Stage II), and the time interval between Stage I and Stage II were compared among groups. In addition, scrapie agent titers in spleen were determined at 28 and 90 days after infection, as were agent titers in spleen and brain at Stage II. Three‐way analysis of variance indicated that the bacterial flora, the presence or absence of a thymus, and the route of agent inoculation interact to produce significant differences in the pathogenesis of disease. The three factors in the experimental design also influenced the spleen titers of scrapie infectivity. The variation in scrapie pathogenesis among the groups of mice is likely to be mediated by differences in their reticuloendothelial systems. These differences may alter the agent's adsorption in spleen and/or route of transport from spleen to brain.
ISSN:0741-5400
1938-3673
DOI:10.1002/jlb.40.5.525