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正常人的胃液通常是无菌或含菌量<10~5/ml。当盐酸分泌受损或缺如时,菌数即增加,常>10~6/ml,而且细菌的种类也可能增多,包括粪便的细菌如大肠杆菌、粪链球菌和类杆菌。此种胃菌群的改变,常见于恶性贫血、胃癌及胃切除术后,也可能受蠕动的改变,盲袢和胆汁反流的影响。胃切除术后病人中,其沙门氏菌肠炎是极常见且严重的,可能因胃排空增速再加胃酸减少灭菌力不足,使大量细菌进入肠道。伴有胆汁反流的病人,胃
Normal gastric juice is usually sterile or containing bacteria <10 ~ 5 / ml. When hydrochloric acid secretion is impaired or absent, the number of bacteria increases, often> 10 ~ 6 / ml, and bacterial species may increase, including fecal bacteria such as Escherichia coli, Streptococcus faecalis and Bacteroides. Such changes in the stomach flora, common in pernicious anemia, gastric cancer and gastrectomy, may also be affected by changes in the peristalsis, blindness and bile reflux. Salmonella enteritis is extremely common and severe in patients who have undergone gastrectomy and may have a large number of bacteria entering the gut due to inadequate sterilization due to insufficient growth rate of gastric emptying plus gastric acid. Patients with bile reflux, stomach