Waterborne disease : 1993 and 1994

For 1993-94, 17 states and one territory reported 30 disease outbreaks associated with drinking water, affecting an estimated 405,366 people. Ten of the 25 outbreaks for which the etiologic agent was identified were caused by Giardia lamblia or Cryptosporidium parvum, eight were caused by chemical poisoning, three by Campylobacter jejuni two by Shigella spp., and one each by non-Ol Vibrio cholerae and Salmonella serotype Typhimurium. Twenty (66.7 percent) of the 30 outbreaks were associated with well water. In addition, nine states reported 14 outbreaks of gastroenteritis associated with recreational water, which affected an estimated 1,437 people. Ten of these outbreaks were caused by Giardia or Cryptosporidium, three by Shigella spp., and one by Escherichia coli 0157:H7.

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