Helicobacter pylori-induced diarrhea post-ileogastrostomy

A retrospective study of all ileogastrostomy procedures (n=26) performed in 1993 by one surgeon (IGMC) was carried out to investigate the hypothesis that Helicobacter pylori may be implicated in certain severe cases of postoperation nausea and diarrhea. Ten of 26 persons (38.5%) displayed nausea and notable diarrhea (greater than or equal to ten bowel movements per day), seven of which warranted upper GI investigation. One hundred per cent (seven of seven) of these persons were found to possess H. pylori upon C-14 breath test. In four of six cases eradication therapy (1 g amoxicillin b.i.d./20 mg omeprazole b.i.d. for 2 weeks) corresponded with a resolution of severe nausea and diarrhea (one additional case involved omeprazole use only), suggesting that H. pylori should be considered as a possible cause of these symptoms post-ileogastrostomy. Additionally, in four of seven cases persons were re-tested (C-14 breath analysis) at least 1 month post-therapy and in this group three persons were found to be free of the organism. All three cases of notable diarrhea and nausea resolved with treatment, providing the strongest evidence for a possible association between infection and these symptoms.     

Accuracy of a rapid 10-minute carbon-14 urea breath test for the diagnosis of Helicobacter pylori-associated peptic ulcer disease

Urease in the human gastric mucosa is a marker for infection with Helicobacter pylori (HP), an organism which is associated with peptic ulcer disease. To detect gastric urease, we examined 184 patients (144 males, 40 females; mean age: 49.8±15.6 years) with suspected peptic ulcer disease. Fasting patients were given orally 5 Ci of carbon-14 labelled urea. From each patient only one breath sample was collected in hyamine at 10 min. The amount of ¹⁴C collected at 10 min was expressed as follows: [(DPM/mmol CO₂ collected)/(DPM administered)] × 100 × body weight (kg). The presence of HP colonization was determined by examination of multiple endoscopic prepyloric antral biopsy specimens subjected to culture or a rapid urease test. For the purpose of this study, HP-positive patients were defined as those with characteristic bacteria as indicated by a positive result of either the culture or the rapid urease test; HP-negative patients were defined as those with negative findings on both the culture and the rapid urease test. Of the 184 cases, 99 (53.8%) were positive for HP infection, and 85 (46.2%), negative. The sensitivity and specificity of the rapid 10 min ¹⁴C-urea breath test for the diagnosis of HP-associated peptic ulcer disease were evaluated by a receiver operating characteristic (ROC) curve with a variable cut-off value from 1.5 to 4.5. When a cut-off value of 1.5 was selected, the sensitivity was 100% and the specificity, 83.5%; when a cut-off value of 4.5 was selected, the sensitivity was 54.5% and the specificity, 97.6%. Correspondence to: Chia-Hung Kao     

Helicobacter pylori

Helicobacter pylori infection is a major cause of peptic ulcer disease, and its detection and eradication are now an important part of gastroenterology. Effective regimes are available which will eliminate the organism in about 90% of cases in developed countries.     

Helicobacter pylori Risk Associated with Sibship Size and Family History of Gastric Diseases in Japanese Adults

Helicobacter pylori is thought to be a cause of gastric cancer. Risk factors of H. pylori positivity were investigated among 4,361 public service workers in Japan. Sera and information on family history and lifestyle were collected, and H. pylori antibody was measured using the sera. Sex- and age-adjusted odds ratios of factors expected to influence H. pylori seropositivity were calculated. The factors with a significant influence were included in a logistic regression model and the final model was obtained by backward elimination. Sibship size (4 and more vs. 1), smoking habit (current vs. never), and paternal and siblings' histories of gastric diseases showed significant relationships to H. pylori seropositivity, with odds ratios (95% confidence intervals) of 1.5 (1.0–2.1), 0.8 (0.7–0.9), 1.5 (1.3–1.8) and 1.7 (1.1–2.6) respectively. However, spouse's history was not related. In the final model, sibship size and paternal history remained as positive factors, and smoking as a negative one. Contradictory results on the relationship between H. pylori status and smoking among recent studies indicate the existence of hidden confounding factors. It is suggested that infection from family members in childhood considerably affects the H. pylori status of Japanese adults, whereas infection between adults is rare.     

幽门螺杆菌尿素酶B亚单位Th表位的免疫学特性研究

采用MHC限制性分析、ELISA方法、淋巴细胞增殖实验等方法研究幽门螺杆菌(Hp)尿素酶B亚单位(UreB)的H- 2~d限制性Th表位U_(546-561)、U_(229-244)、U_(237-251)的免疫学特性。发现抗I-E~d抗体能够抑制U_(546-561)对CD4~+T淋巴细胞的刺激,抗I-A~d抗体能够抑制U_(229-244)、U_(237-251)对CD4~+T淋巴细胞的刺激作用。U_(229-244)、U_(229-244)能刺激CD4~+T淋巴细胞分泌IL-4和IL-10,U_(237-251)刺激CD4~+T淋巴细胞分泌IFN-γ、IL-2,且U_(546-561)、U_(229-244)、U_(237-251)三个表位肽免疫BALB/c小鼠能够引起针对各自免疫多肽和rUreB的CD4~+T细胞应答。结果表明U_(546-561)为I-E~d限制性Th2表位,U_(229-244)为I-A~d限制性Th2表位、U_(237-251)为I-A~d限制性Th1表位。三个表位之间具有协同刺激效应,可以用于Hp表位疫苗的研究。     

莫西沙星四联疗法根除幽门螺旋杆菌的临床疗效观察

目的 探讨莫西沙星四联疗法根除幽门螺旋杆菌的临床疗效。方法 收集2020年6—12月在医院消化内科确诊幽门螺旋杆菌感染患者,随机分为两组,每组65例。试验组采用口服含莫西沙星四联根除方案（包括莫西沙星、呋喃唑酮、枸橼酸铋钾胶囊、埃索美拉唑镁肠溶胶囊,连续服用14 d）;对照组采用常规四联根除方案（包括克拉霉素、呋喃唑酮、枸橼酸铋钾胶囊、埃索美拉唑镁肠溶胶囊,连续服用14 d）。治疗4周后,观察两组患者幽门螺旋杆菌根除率、不良反应发生率、症状缓解率、胃黏膜炎症情况。结果 试验组幽门螺旋杆菌根除率92.3%(60/65),对照组幽门螺旋杆菌根除率72.3%(47/65),症状缓解率分别是96.9%(63/65),78.5%(51/65),不良反应发生率分别是6.2%(4/65),20.0%(13/65),试验组炎症改善情况明显优于对照组,差异有统计学意义（P <0.05）。结论 莫西沙星四联疗法根除幽门螺旋杆菌疗效好,不良反应少,可作为根除幽门螺旋杆菌的优选方案。     

辅助抗生素治疗宫颈癌前病变并发幽门螺杆菌感染的疗效观察

①目的探讨辅助抗生素治疗对宫颈癌前病变并发幽门螺杆菌（Hp）感染的治疗效果。②方法采用快速Hp尿素酶检测法筛选宫颈癌前病变的相关病例，用阴道镜和组织病理学进行诊断证实。对各类宫颈癌前病变创伤性治疗的同时，规范采用甲硝唑治疗。观察幽门螺旋杆菌阳性率的改变和临床表现的变化。③结果Hp感染与宫颈癌前病变发展为宫颈癌有相关性；除了手术治疗外，规范的甲硝唑治疗可以降低Hp感染的阳性发生率，同时，可以对宫颈癌起病因学治疗作用。④结论辅助抗生素治疗对宫颈癌前病变并发Hp感染的患者．可以起到消除潜在癌变的诱因和提高疗效的作用。     

Non-Viable Lactobacillus reuteri DSMZ 17648 (Pylopass?) as a New Approach to Helicobacter pylori Control in Humans

Prevalence of infections by Helicobacter pylori, a pathogen involved in a number of gastrointestinal diseases, remains high in developing countries. Management of infections by eradication is not always an option. Lactobacillus reuteri (L. reuteri) DSMZ17648 (Pylopass™/Lonza) specifically co-aggregates H. pyloriin vitro and was shown to reduce ¹³C urea breath test in vivo. In this pilot study, we tried to replicate previous findings in an independent sample and to evaluate effects of spray-drying vs. freeze-drying of cultures. A single-blinded, placebo-controlled study was done in 22 H. pylori positive, asymptomatic adults. H. pylori levels were determined by ¹³C-urea-breath method after 14 days of supplementation, as well as after 6, 12, and 24 weeks follow-up. In the test group, but not in the placebo group, a significant reduction of H. pylori was observed. For the first time, spray-dried cells of L. reuteri DSMZ17648 have been used in a human study and results are in line with the first study results, supplementing with freeze-dried material. This is of special interest as spray-drying results in dead cell material, meaning that the effect of L. reuteri must be independent of its probiotic activity. These results confirm the potential of Pylopass™ as a novel way to reduce the load of H. pylori.     

Helicobacter pylori in Peptic Ulcer: Have Koch's Postulates Been Fulfilled?

This brief review considers whether or not Koch's postulates have been fulfilled for Helicobacter pylori and peptic ulceration. The histological features of peptic ulcer disease in man are active chronic gastritis with antral predominance, duodenal gastric metaplasia and active duodenitis. Other features are hyperpepsinogenaemia, relative postprandial hypergastrinaemia and basal acid hypersecretion. The macroscopic features are duodenal bulb ulceration or lesser curve and antral gastric ulceration.

At present, gastric colonization with H. pylori has been produced in small animal species (rats and mice), but the infection is difficult to establish in immunocompetent animals, and histological gastritis is unconvincing. In larger animals the germ-free pig has been the most reliable model but the gastritis tends to be chronic with little activity.

The best examples of acute infection are in three ‘self-administration’ experiments in humans. In these cases acute gastritis with hypochlorhydria developed which, when it converted to active chronic gastritis, tended to be asymptomatic. Either the circumstances were incompatible with ulceration, or the experiments were not continued for the many years necessary to develop peptic ulceration. It is concluded that only one of the many steps required for the development of peptic ulceration has so far been fulfilled, i.e. the ability of H. pylori to produce histological gastritis in a susceptible host.     

What Are the Specific Features of Helicobacter pylori Gastritis in Children?

Children with recurrent abdominal pain and dyspeptic symptoms often present histological gastritis and Helicobacter pylori infection. No specific symptomatology has been found, however, to discriminate H. pylori positive from negative subjects. Certain differences exist in gastritis in paediatric age groups, in comparison with adults. In terms of treatment, children also form a special entity because of the long exposure time of H. pylori infection. This article describes the typical findings of H. pylori gastritis in children and discusses their significance from a clinical point of view.