Minnesota heath officials are reporting a record number of cryptosporidium cases this year, and the recreational water illness has prompted at least one pool closure.

Officials have logged approximately 150 cases so far this year, according to local news reports. That number reflects a 10-year high.

Symptoms of crypto include watery diarrhea, vomiting, stomach cramps and a slight fever.

In the wake of the statewide uptick, last month the City of Marshall briefly closed its aquatic center operations , according to local media reports. The move was voluntary, when health officials confirmed that two people who reported using the aquatic center had been sickened by cryptosporidium

Last year, there were 59 reported cases of the recreational water illness in Minnesota, most during the summer and early fall. Two major outbreaks have contributed to the statistics this year. In late March, 97 cases were reported in connection with Edgewater Resort and Water Park in Duluth. Approximately 40 cases were linked to Paul Bunyan indoor waterpark at The Lodge at Brainerd Lakes in Baxter. Both closed voluntarily for hyperchlorination.

“The increase in crypto cases is a stark reminder of how important it is to follow healthy swimming practices,” noted Doug Schultz, public information officer, Minnesota Department of Health.