Definition: A sucking louse (order Anoplura) of rats and mice. The species Polyplax serratus (the mouse louse) has been shown experimentally to be capable of transmitting tularemia and may also be a vector for murine typhus and Trypanosoma lewisi.
[poly- + G. plax, plate, plaque]
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Examples: glitazone, GI cocktail, etc.