Abstract
Background: An outbreak of hepatitis A took place in the coastal village of Bueu, Galicia, Spain in the period 15 July–1 November 1997 involving a total of 114 reported cases out of a population of 12,480. Preliminary investigations pointed to a waterborne outbreak. Methods: A matched case-control study was designed. Results: A statistical association was found with consumption of water from two public water fountains (‘A’ and ‘B’) and a history of bathing at a nearby beach. Conclusions: After controlling for potential confounders, the only source of the outbreak was water drunk from fountain ‘A’ (odds ratio = 55.0 and 95% confidence interval: 18.0–168.0).
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