A foodborne parasite is spreading across the US, causing a gastrointestinal illness known as cyclosporiasis. This infection is marked by intense, watery diarrhea and has sickened nearly 3,000 people nationwide.

The Centers for Disease Control and Prevention has reported cases in 31 states, with 86 people hospitalized. The CDC has confirmed 843 cases acquired in the US and is investigating over 1,500 more. No deaths have been reported.

Further details on the outbreak, including its cause and whether cases are connected, are available from the CDC. The outbreak has been particularly intense in some states, with Michigan reporting the most cases.