Escherichia coli is an indispensable single cell organism in human body.Escherichia coli, commonly known as Escherichia coli (Gram negative Brevibacterium), has flagella all over the body, can move, and has no buds.It is a normal inhabiting bacterium in human and animal intestines.Plasma coagulase is one of the pathogenic substances of Escherichia coli.According to the different pathogenicity, diarrhoeal Escherichia coli can be divided into five types: enterotoxigenic Escherichia coli, intestinal invasive Escherichia coli, intestinal pathogenic Escherichia coli, intestinal agglomerative adhesive Escherichia coli and enterohemorrhagic Escherichia coli.
Chinese name
Escherichia coli
Foreign name
Escherichia coli，E.coli
Size
0.5 × 1-3 μ m
Role
Fermentation of various sugars to produce acid and gas
Common name
Escherichia coli (Gram negative short bacilli)
Time of occurrence
March/September
Poisoned food
All kinds of cooked meat products, raw and cold food
Escherichia coli, commonly known as Escherichia coli (Gram negative Brevibacterium), has flagella all over the body, can move, and has no buds.It is a normal inhabiting bacterium in human and animal intestines.Plasma coagulase is one of the pathogenic substances of Escherichia coli.According to the different pathogenicity, diarrhoeal Escherichia coli can be divided into five types: enterotoxigenic Escherichia coli, intestinal invasive Escherichia coli, intestinal pathogenic Escherichia coli, intestinal agglomerative adhesive Escherichia coli and enterohemorrhagic Escherichia coli.Some strains of Escherichia are related to infant diarrhea and can cause adult diarrhea or food poisoning outbreaks.Enterohemorrhagic Escherichia coli O157: H7 was the culprit of the food poisoning outbreak in Japan in 1996. It is the pathogenic serotype of hemorrhagic Escherichia coli, mainly affecting the distal part of the small intestine and colon.The common poisoning food is all kinds of cooked meat products, cold meat, beef, raw milk, followed by eggs and egg productscheeseAnd vegetables, fruits, drinks and other foods.The main cause of poisoning was that the contaminated food was not thoroughly heated before eating.Poisoning mostly occurs in March and September.
Poisoning performance
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The symptoms of poisoning caused by different diarrhoeal Escherichia coli are different. ①The main symptoms of enterotoxigenic Escherichia coli poisoning are watery diarrhea, abdominal pain, nausea and low fever.Diarrhea can reach 8-12 times a day. ②The poisoning symptoms of intestinal invasive Escherichia coli are similar to dysentery caused by Shigella, including fever, severe abdominal pain, watery diarrhea, and a small amount of mucus and blood in stool. ③The main symptoms of poisoning caused by enteric pathogenic Escherichia coli are fever, discomfort, vomiting, diarrhea, a lot of mucus in stool but no blood. About 20% of patients have respiratory symptoms, and the symptoms of infection are usually serious. ④The poisoning symptoms caused by intestinal agglomerative adhesive Escherichia coli in adults are moderate diarrhea, and the course of disease is 1 to 2 days.Infants often show persistent diarrhea for more than 2 weeks. ⑤Poisoning caused by EHEC usually occurs in 3 to 10 days, often with sudden abdominal spasm, sometimes similar to appendicitis pain.Some patients only have mild diarrhea;Some patients have changed from watery stool to bloody diarrhea, sometimes the diarrhea frequency can reach more than 10 times, with low or no fever;Many patients also have respiratory symptoms.It may develop into multiple organ damage such as hemolytic uremic syndrome and thrombotic thrombocytopenic purpura.The mortality rate of the elderly and children is high.[1]
Emergency treatment
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Eliminate poisons, and induce vomiting, gastric lavage and catharsis if necessary;Symptomatic treatment;Chloramphenicol, polymyxin, gentamicin and kanamycin are the first choice for antibiotic treatment.For patients with EHEC infection, antibiotics should be used with caution, because antibiotics can not shorten the course of disease, but will increase the chance of hemolytic uremic syndrome.
Poisoning prevention
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Do not eat raw or incompletely heated milk, meat and other animal food.Do not eat unclean fruits and vegetables.Heat the leftovers thoroughly before eating.Prevent cross contamination of raw and cooked food.Develop good personal hygiene habits and wash hands before meals and after defecation.Food processing and production enterprises, especially catering industry, shall strictly ensure the safety of food processing, transportation and sales.[1]
