Any contagious and fatal epidemic disease was originally called a plague (from plaga, a stroke), but this term is now applied to that particular kind of plague which is characterised by the appearance of high fever with inflammation of lymphatic glands or bubo, and is therefore called the Bubonic Plague. In Sanskrit Medical Books it has been described as Vidradhi and Visharpa, and in Yonani as Taoon. The following definition given by Cantlie is comprehensive. “Plague or Malignant Polyadenites is an acute febrile disease of an intensely fatal nature characterised by inflammation of the lymphatic glands, marked cerebral and vascular disturbances, and by the presence of a specific bacillus.”