Course of infection and development of immunity in experimental infection of mice with Listeria serotypes.

Infection and Immunity
C H von KoenigH Finger

Abstract

NMRI mice were experimentally infected with Listeria monocytogenes serotypes 1/2b, 3a, 4b, and 4d and Listeria innocua serotype 6b by different means. The course of infection was monitored, using bacteriological and histological methods. The following typical features of experimental infection with the various L. monocytogenes and L. innocua serotypes were observed. (i) On the basis of the mean lethal dose, L. monocytogenes 4b, 4d, and 1/2b proved to be mouse pathogenic, although to different degrees, L. monocytogenes 3a and L. innocua can be regarded as nonpathogenic for NMRI mice. The virulence of L. monocytogenes serotype 4d was increased 1,000-fold after adaptation to mice. (ii) Primary infection with any serotype of L. monocytogenes or L. innocua resulted in protection against a lethal challenge with the most virulent serotype, 4b. This protective immunity could be transferred by spleen cells. Compared with the duration of immunity achieved by infection with L. monocytogenes serotype 4b, the protection induced by infection with L. innocua was short lived and dose dependent. The data obtained also suggest that immunity after experimental infection with any serotype of L. monocytogenes or L. innocua is produced only when the...Continue Reading

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Jan 1, 1985·Antonie van Leeuwenhoek·A C AntonissenC P van Boven
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