You might dub it “produce paranoia.” On social media, videos show people clearing out their fridges, swearing off salads and debating whether it’s safe to eat cilantro.It’s the frantic but expected internet response to the surge in cases of a diarrhea-causing parasite that’s rapidly spreading across the US, as health officials investigate what type of produce is contributing to the outbreak.The gastrointestinal illness is caused by cyclospora, a foodborne pathogen that’s difficult to trace but has historically been linked to fresh produce such as berries and lettuce. For several weeks, no specific food, brand, grower or supplier was conclusively identified…