Science Weekly Can we eradicate a second human disease?
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Apr 7, 2026 David Molyneux, emeritus professor of tropical disease biology and neglected tropical disease expert. They explore guinea worm biology and painful emergence from humans. They cover eradication tactics like filters and surveillance. They discuss new animal and fish transmission routes and the political and practical hurdles to certifying eradication.
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Guinea Worm Life Cycle Drives Transmission
- Guinea worm is a large nematode that completes its life cycle via freshwater copepods which people ingest.
- Females migrate to skin, form painful blisters and release larvae when blistered skin contacts water, driving transmission.
Extraction Around A Stick Is The Only Treatment
- There is no drug cure; extraction is manual and slow, requiring wrapping the worm around a stick.
- The painful, weeks-long extraction often leaves people unable to walk, harming livelihoods in rural communities.
Use Low Tech Measures To Break Transmission
- Control relies on low-tech public health actions: provide water filters, clean water and active surveillance to stop contaminated people entering water sources.
- The Carter Centre and WHO drove case-finding and behaviour change to cut cases from millions to handfuls.