Question

Select the micro-organism which is NOT an enteric pathogen.

• A. Staphylococcus aureus
• B. \textit{Vibrio cholerae}
• C. \textit{Escherichia coli}
• D. \textit{Salmonella typhi}

Hint:

Remember: Vibrio, E. coli, and Salmonella are classic enteric bacteria; Staphylococcus is not.

Answer 1

The Correct Option is A

Step 1: Define enteric pathogen.
Enteric pathogens are microorganisms that primarily infect the intestine and are spread by the fecal–oral route, often causing diarrhea, dysentery, or typhoid.

Step 2: Examine each option.
- (B) Vibrio cholerae: Causes cholera, a classic intestinal infection.
- (C) Escherichia coli: Gut bacterium, with several pathogenic intestinal strains.
- (D) Salmonella typhi: Causes typhoid fever (enteric fever).
- (A) Staphylococcus aureus: Known mainly for skin, wound, and respiratory infections. It can cause food poisoning via enterotoxins but does not colonize the intestine as an enteric pathogen.

Step 3: Conclusion.
Thus, Staphylococcus aureus is not an enteric pathogen. \[ \boxed{(A) \; Staphylococcus aureus} \] % Quicktip