Cholera Transmission Misconception

Steps:

• Identify cholera's cause: Vibrio cholerae bacteria, confirming B.
• Review transmission: Primarily fecal-oral via contaminated water/food, not animals, ruling out D.
• Check control: Oral vaccines exist, supporting A.
• Assess risks: HIV/AIDS impairs immunity, heightening susceptibility, validating C.

Why D is correct:

• Cholera spreads through contaminated water and food (fecal-oral route), not animal vectors like mosquitoes or rodents.

Why the others are wrong:

• A: Effective vaccines, such as Dukoral, control outbreaks in high-risk areas.
• B: Directly caused by the bacterium Vibrio cholerae.
• C: HIV/AIDS weakens the immune system, increasing vulnerability to severe cholera infections.

Final answer: D