Cholera Transmission and Outbreak Factors

Steps:

• Cholera, caused by Vibrio cholerae, spreads via fecal-oral route, primarily through contaminated water (statement 3).
• The pathogen induces severe watery diarrhea, increasing fecal shedding and environmental contamination (statement 1).
• Global mobility from air travel disperses infected individuals, accelerating outbreaks across regions (statement 2).
• All three factors combine to explain why outbreaks occur frequently in vulnerable populations.

Why A is correct:

• Vibrio cholerae outbreaks require transmission via water, amplified by diarrhea's volume and human mobility, per WHO epidemiology guidelines.

Why the others are wrong:

• B: Excludes water transmission, the primary vector for cholera.
• C: Ignores mobility, which enables rapid international spread.
• D: Omits watery feces, essential for high pathogen loads in outbreaks.

Final answer: A