Test that found source of US explosive diarrhoea outbreak was false positive, health officials say

Health officials in the US have announced that a test which claimed to have found the source of an explosive diarrhoea outbreak was a false positive. The outbreak is caused by a parasite, but the exact source of the parasite remains unknown. The US Food and Drug Administration has confirmed the false positive result, leaving the origin of the outbreak still undetermined. Further investigation is needed to identify the true source of the parasite.

✦ AI-generated summary