Plague, was a term that was used in the Middle Ages to describe all fatal epidemic diseases, but now it is only applied to an infectious, contagious disease of rodents and humans. In humans, plague occurs in three forms: , pneumonic plague, and septicemic plague. The best known form is the and it is named after buboes, or enlarged, inflamed lymph nodes, which are characteristics of the plague in the groin or neck or armpit. can only be transmitted by the bite of any of numerous insects that are normally parasitic on rodents and that seek new ....