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Listeria - Is There Sustained Immune Response?
Listeria is an intracellular only pathogen. Our T cells are much more involved in that part of our immune response, like killing infected cells versus antibody responding to bacteria that are free-floating in our bloodstream. So for cases when you lack that response for one reason or another, that is when you actually see listeriosis manifest itself. It tends to respond better to specific antibiotics that maybe aren't used as commonly as general antibiotics if someone comes in with bacteria or septicemia. A lot of times we do see delays in appropriate treatment because it's a hard disease to diagnose.