At least 15 people were sickened by a parasite after drinking from a natural spring in New Hampshire, which also tested positive for E. coli, health officials said Thursday.

Giardia had been suspected at the spring in Bethlehem , and testing confirmed the parasite's presence in the water, which comes out on Old Franconia Road, the Department of Health and Human Services said.

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They urged anyone with water collected from the spring, which flows from a white pipe into a roadside bowl, to get rid of it or, if they plan on using it for anything, boiling it first.

Initially, five cases of giardia dating to late August were identified, and health officials urged anyone who drank from the spring in Bethlehem, to look out

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