<prompt> Which amongst the following biological agents has the highest potential for use as a vector in bioterrorismPlague Yersinia pestisSmall pox variola majorBotulism Cl. BotulinumBrucellosis Brucella sp  <response>: Plague - this disease has a history of its use in biological warfare dating back many centuries and is considered a thread due to its ease of culture and ability to remain in circulation among local rodents for a long period of time. Ref: Baveja textbook of microbiology; 4th edition 