Federal health officials have been investigating five different clusters of cyclosporiasis cases since the start of parasite season in May, the FDA said on Monday.

Federal health officials have been investigating five different clusters of cyclosporiasis cases since the start of parasite season in May, the FDA said on Monday.

As cases of cyclosporiasis are continuing to increase across the U.S., here's what we still don't know about a multi-state outbreak.

Infections caused by the parasite have led to more than 300 hospitalizations since May