This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
Which amongst the following biological agents has the least potential for use as a biological weapon for microbial bio-terrorism? 
Select and explain. 
A. Plague (Yersinia Pestis), B. Small Pox (Variola Major), C. Botulism (CI. Botulinum), D. Brucellosis (Brucella spp)
D: Brucellosis (Brucella spp)
Answer: D: Brucellosis (Brucella spp) 
Explanation: Brucella spp, comes under the Category B agents used in bioterrorism which has moderate morbidity rates and low moality rates as compared to the other agents shown above which are Category A agents and responsible for high moality rates. Ref: Harrison's Principles of Internal Medicine, 16th edition, Page 1279.