Snails contain many parasites, but they can be treated. Generally, it takes several months to half a year for snails with eggs to get sick by mistake, and there are few cases of ectoparasites. However, eating raw or undercooked snails is very likely to be infected with parasites, so diet should be avoided in the future. If it is shelled, it can be killed in 10 minutes. Generally, 80 degrees 10 minute can kill most pathogenic bacteria. It is best not to eat it after Qingming, because it is the high incidence season of parasites.