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
Enteric fever is caused by: September 2005 
Select and explain. 
A. Salmonella typhi, B. Salmonella paratyphi A, C. Salmonella paratyphi B, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Ans. D: All of the above Typhoid fever is caused by Salmonella typhi. Paratyphoid fever is caused by Salmonella paratyphi A, B and C. The term enteric fever encompasses both typhoid and paratyphoid fevers.