Are inflammatory phagocytes responsible for resistance to facultative intracellular bacteria? - PubMed (original) (raw)
Are inflammatory phagocytes responsible for resistance to facultative intracellular bacteria?
P A Campbell. Immunol Today. 1986 Mar.
Abstract
At least 38 deaths from listeriosis in the United States in recent months have drawn attention to how little we know about resistance to facultative intracellular bacteria. Much more is known about resistance to obligate intracellular parasites. Macrophages, activated by T cell-derived macrophage activating factors (MAF), are able to kill obligate intracellular parasites and tumor cells(1-10) including Leishmania, certain trypanosomes, Toxoplasma, the obligate intracellular bacterium Rickettsia, and perhaps bacteria such as mycobacteria and Legionella. However, macrophages, stimulated by MAF, may not be the only host cells which can defend against infection by facultative intracellular bacteria such as Salmonella typhimurium or Listeria monocytogenes. Six different observations made by Priscilla Campbell and colleagues, and by others, suggest that it is not the so-called 'activated' macrophage which is primarily responsible for resistance against facultative intracellular bacteria. Rather, she proposes that an early inflammatory cell recently recruited in response to an inflammatory stimulus - a cell whose presence seems to be under the control of immunologically-specific T cells - plays a critical role in resistance to infection by these organisms.
Copyright © 1986. Published by Elsevier B.V.
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