This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Enterobecteriaceae, Subject name: Microbiology
Sal monella infection is most commonly caused by- 
Select and explain. 
A. Infected water, B. Infected vegetable, C. Aerosol infection, D. Through skin
A: Infected water
Answer: A: Infected water 
Explanation: Ans. is 4a & b' i.e., Infected water & Infected vegetable Transmission of salmonella tvphio Typhoid fever is transmitted via the faecal-oral route or urine-oral routes. This may take place directly through soiled hands contaminated with faeces or urine of cases or carriers, or indirectly by the ingestion of contaminated water, milk and/or food, or through files.Dynamics of typhoid fever transmission