Federal health officials are investigating a new outbreak involving cyclosporoa, a microscopic parasite that causes diarrheal illness. As of Wednesday, the outbreak has affected 72 people, though authorities have not yet identified the specific products linked to these cases or their geographic locations.

The Department of Health and Human Services stated on Thursday that the investigation is ongoing and that officials are collaborating to determine the precise source of the illnesses within this cluster.

This development follows a separate multistate outbreak earlier this year that was linked to iceberg lettuce supplied by Taylor Farms. Last week, the company issued a recall for lettuce grown in central Mexico amid that investigation.

Cyclosporoa is typically transmitted through food contaminated with human feces, most often when produce is irrigated or washed with contaminated water. Infection leads to intestinal symptoms, including frequent and sometimes severe diarrhea, according to the Centers for Disease Control and Prevention (CDC).

Federal and state health agencies continue to monitor multiple clusters of cyclosporoa infections, including the one associated with the lettuce from Taylor Farms. Health experts recommend preventive measures such as thorough handwashing with soap and water after using the bathroom and before handling food. Since the parasite can be killed by heat, cooking produce to an internal temperature of at least 158 degrees Fahrenheit is advised to reduce risk of infection.