Photo: Bangladesh Woman at local water source filtering water with sari cloth.
Caption: In cholera-endemic areas such as Bangladesh, human beings are part of the cholera bacteria's ecosystem. Yet there is a simple and inexpensive tool available to thwart its progress. A sari cloth such as this, available even in the poorest household, can be folded eight to ten times. This creates a 20-micron mesh filter, as determined by electron microscopy. Straining water through several layers of sari cloth may be enough to prevent ingestion of infectious levels of cholera bacteria.
Source: Dr. Rita Colwell, Director of The National Science Foundation
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From Dr. Colwell's Personal Collection
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