In developing areas of the world, where local people’s understanding of germ theory and water and sanitation problems is not complete, 3MTM PetrifilmTM can act as an important visual aid for development workers in order to educate people about water and sanitation topics. The present article gives an example of how 3MTM PetrifilmTM has been used to help establish a baseline understanding of water and sanitation problems in rural Mali, and motivated improved water and sanitation practices.
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