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To fight, flee or hide are the imperatives of long-term survival by an infectious microbe. Active immune suppression, induction of immune tolerance, phase and antigenic variation, intracellular seclusion, and incursion into immune privileged sites are examples of survival strategies of persistent pathogens. Here we critically review the supporting evidence for possible stratagems utilized by Borrelia burgdorferi, the spirochete that causes
Lyme disease, to persist in the mammalian host.