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J Med Microbiol. 1990 Sep;33(1):51-4.

Ingested Listeria monocytogenes survive and multiply in protozoa.

Author information

1
Staatliches Medizinaluntersuchungsamt Braunschweig, Federal Republic of Germany.

Abstract

Listeria monocytogenes cells are ingested by protozoa such as Acanthamoeba sp. or Tetrahymena pyriformis. However, they are not killed, but survive within the protozoa and may multiply intracellularly. The protozoa are lysed within about 8 days, releasing viable L. monocytogenes. No co-existence was observed between L. monocytogenes and Tetrahymena. A co-culture of L. monocytogenes and Acanthamoeba sp. showed a decay of locomotive forms and release of listeria from vegetative protozoan cells whereas the bacteria were destroyed in cysts. These phenomena provide an insight into the pathogenesis of listeria infection in man and warm-blooded animals because intracellular processes occurring in protozoa after ingestion of L. monocytogenes may be similar to those observed in mammalian cells.

PMID:
2121990
DOI:
10.1099/00222615-33-1-51
[Indexed for MEDLINE]

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