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Passive immunization with convalescent serum, or oral immunization with formalin-killed organisms, does not protect mice against gastrointestinal challenge with Listeria monocytogenes.

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  • 1Department of Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin-Madison, 53706, USA.

Abstract

Listeria monocytogenes is an important foodborne pathogen in both humans and animals. In addition, murine listeriosis is a widely used model for studying the molecular pathogenesis of an intracellular pathogen, and the regulation of protective cellular immunity. Little attention has been paid to protective immunity against L. monocytogenes in the gastrointestinal tract, where a secretory immune response might prevent attachment of the bacteria to the intestinal epithelium. In this study we found that neither opsonization of L. monocytogenes with immune serum, nor repeated oral administration of killed L. monocytogenes, protected mice against gastrointestinal challenge with L. monocytogenes.

PMID:
11848130
[PubMed - indexed for MEDLINE]

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