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
Which of the following is true regarding Salmonella infection - 
Select and explain. 
A. Urine culture is + ve in 1st week, B. Stool culture is + ve in 1st week, C. Blood culture is + ve in 3-7 days, D. Widal test is + ve in 1st week
C: Blood culture is + ve in 3-7 days
Answer: C: Blood culture is + ve in 3-7 days 
Explanation: None