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: Microbiology
Infective dose of salmonella typhi ? 
Select and explain. 
A. 10 bacilli, B. 1000 bacilli, C. 103-106 bacilli, D. 1010 - 1012 bacilli
C: 103-106 bacilli
Answer: C: 103-106 bacilli 
Explanation: Ans. is 'c' i.e., 103-106 bacilli In human volunteer experiments, the infective dose was found to be 103-106 bacilli.