This historic photograph depicted a portable emergency hypochlorite device that in this case, had been used to stop a 1914 epidemic of typhoid fever in Benson, Minnesota. Its purpose was to purify water contaminated with the pathogenic bacteria, Salmonella typhi. It was one of a series of instructional photos used by the Minnesota Board of Health to train public health workers.
CDC/ Minnesota Department of Health, R.N. Barr Library; Librarians Melissa Rethlefsen and Marie Jones
November 27, 2012
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