Several people were sickened by a parasite, New Hampshire health officials said Saturday, as they investigated whether drinking natural spring water was the cause.

Five cases of giardia, in late August, have been identified, the New Hampshire Department of Health and Human Services said Saturday. Four of those people reported drinking from a spring on Old Franconia Road in Bethlehem, and investigators were working to determine which spring the fifth reported drinking from.

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Officials urged anyone who drank from the spring in Bethlehem, which flows from a white pipe into a roadside bowl, to look out for symptoms of the sickness that giardia can cause: diarrhea, stomach cramps, nausea, gas and dehydration.

Officials

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