Behind US ‘explosive diarrhoea’ outbreak, hard-to-kill parasite that clings to greens
US investigators linked a severe diarrhoea outbreak to a parasite associated with contaminated leafy greens and other fresh produce.

- Investigators linked a severe diarrhoea outbreak to a parasite associated with contaminated leafy greens and other fresh produce.
- The parasite can survive on produce and can travel through food supply chains, which makes outbreak control difficult.
- Better sanitation, source tracking, and stronger food-safety controls are central prevention concerns.
What happened
US investigators linked a severe diarrhoea outbreak to a stubborn parasite associated with contaminated leafy greens and other fresh produce. The contamination can travel through food supply chains, so the outbreak is difficult to contain quickly once the organism enters the distribution system.
UPSC may use this topic to test the route of transmission, the limits of household-level cleaning, and the need for traceability and sanitation across the food supply chain. The issue also connects to public health regulation, disease prevention, and food-safety oversight.
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