① The epidemic situation mostly occurred in collective dining units, and the patients were obviously related to eating the same contaminated food;

② The incubation period is short, and the onset is sudden, with acute gastroenteritis as the main clinical manifestation and ophthalmoplegia and pharyngeal paralysis as the main botulism;

③ The course of disease is short, and most of them heal themselves within 2 ~ 3 days;

④ It mostly occurs in summer and autumn; According to the different clinical manifestations, it can be divided into gastrointestinal food poisoning and nervous system food poisoning.