What is Listeria infection (listeriosis)?

Updated: Jan 09, 2018
  • Author: Terence Zach, MD; Chief Editor: Russell W Steele, MD  more...
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Answer

Listeriosis is an infection caused by the gram-positive motile bacterium Listeria monocytogenes. [1, 2]  Listeriosis is relatively rare and occurs primarily in newborn infants, elderly patients, and patients who are immunocompromised. [3]  See the image below.

Electron micrograph of an artificially-colored Lis Electron micrograph of an artificially-colored Listeria bacterium in tissue.

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