Comment by readthenotes1

You left one variant off, apparently:

"Plague occurs in three forms, bubonic, septicemic and pneumonic, depending on whether the infection hits the lymph nodes, bloodstream or lungs. Most US cases are bubonic, typically spread via flea bites from infected rodents. "

Given the discussion of the prairie dog die off, it's more interesting than it was mnemonic and not move on it for me fleas