Officials are still searching for the source of the outbreak, prompting consumers to seek advice on social media about which foods to avoid.

USA TODAY reached out to major national fast-food chains asking if they are doing anything different during the uptick in cyclosporiasis cases.

Cyclosporiasis, a parasitic illness that causes explosive diarrhea, is still surging throughout the country. As of Tuesday, there have been 1,645 confirmed cyclosporiasis cases…