Relationship between the presence of helicobacter pylori with inflammatory endoscopic changes in gastroduodenal mucosa / Relação entre a presença do helicobacter pylori com alterações endoscópicas inflamatórias na mucosa gastroduodenal

ABSTRACT Background: The influence of Helicobacter pylori (HP) in inflammatory disorders of the digestive mucosa has been the subject of several studies since socioeconomic, personal and environmental factors were implicated in the bacteria transmission. Aim: To correlate the inflammatory endoscopic findings with HP infection and the onset of mucosal diseases mucous of the upper digestive tract. Method: Comparative observational study, in which were collected data from 2247 patients who underwent upper endoscopy and biopsies for HP with urease test. The patients were divided into two groups: HP+ and HP- (control) in which endoscopic findings were observed for the following changes: esophagitis, esophageal ulcer, gastritis, erosive gastritis, gastric ulcer, bulboduodenitis, bulbar ulcer and without disease. Results: As for esophagitis, there was little disparity in the distribution favorable to HP+ group (HP+ =67.11% and HP- =69.89%) and esophageal ulcer (HP+ =0% and HP- =0, 21%). Gastritis was favorable to HP- group (HP+ =78.34% and HP- =73.63%), as well as erosive gastritis (HP+ = 67,11% and HP- = 64,55%), in bulboduodenitis (HP+ =1,87% and HP- 1,23%), in gastric ulcer (HP+ =2,14% and HP- =2,03%) and in the absence of alterations in the HP+ group (4.81%) with the HP- control group (6,30%), in which there was little disproportion in favor of HP- group, but without statistical significance. As for the bulbar ulcer (HP +=10.16% and HP- =4.48%), there was statistically significant (p=0.00001). Conclusion: There is no difference between HP+ and HP- groups in inflammatory changes in endoscopic gastroduodenal mucosa, except for the relationship between HP and bulbar ulcer.

RESUMO Racional: A influência do Helicobacter pylori (HP) nas alterações inflamatórias das mucosas digestivas tem sido objeto de vários estudos uma vez que fatores socioeconômicos, pessoais e ambientais são implicados na transmissão da bactéria, facilitando-a. Objetivo: Relacionar os achados inflamatórios endoscópicos com a infecção pelo HP e o aparecimento de doenças mucosas do trato digestivo alto. Método: Estudo observacional comparativo, o qual foram coletados dados de 2247 pacientes submetidos à endoscopia digestiva alta e biópsias para HP com teste de urease. Os pacientes foram divididos em dois grupos: HP+ e o controle HP-dentro dos quais foram observados os achados endoscópicos referentes às seguintes alterações: esofagite, úlcera esofágica, gastrite, gastrite erosiva, úlcera gástrica, bulboduodenite, úlcera bulbar e sem doença. Resultados: Quanto à esofagite, observou-se pequena desproporção na distribuição, favorável ao grupo HP+ (HP+ =67,11% e HP- =69,89%) bem como na úlcera esofágica (HP+ =0% e HP- =0,21%). Na gastrite foi favorável ao grupo HP- (HP+ =78.34% e HP- =73.63%), assim como na gastrite erosiva (HP+ = 67,11% e HP- = 64,55%), na bulboduodenite (HP+ = 1,87% e HP- 1,23%), na úlcera gástrica (HP+ =2,14% e HP- =2,03%) e na ausência de alterações no grupo HP+ (4.81%) com o grupo controle HP- (6,30%), nos quais há pequena desproporção favorável ao grupo HP-, porém, sem significância estatística. Já quanto à úlcera bulbar (HP+ =10,16% e HP- =4,48%), houve significância estatística (p=0,00001). Conclusão: Não há diferenciação entre os grupos HP+ e HP- nas alterações endoscópicas inflamatórias na mucosa gastroduodenal, exceto para a relação entre HP e úlcera bulbar.

Duodenal gastric metaplasia and Helicobacter pylori infection in patients with diffuse nodular duodenitis

Whether the regression of gastric metaplasia in the duodenum can be achieved after eradication of Helicobacter pylori is not clear. The aim of the present study was to investigate the relationship between H. pylori infection and gastric metaplasia in patients with endoscopic diffuse nodular duodenitis. Eighty-six patients with endoscopically confirmed nodular duodenitis and 40 control patients with normal duodenal appearance were investigated. The H. pylori-positive patients with duodenitis received anti-H. pylori triple therapy (20 mg omeprazole plus 250 mg clarithromycin and 400 mg metronidazole, all twice daily) for one week. A control endoscopy was performed 6 months after H. pylori treatment. The H. pylori-negative patients with duodenitis received 20 mg omeprazole once daily for 6 months and a control endoscopy was performed 2 weeks after treatment. The prevalence of H. pylori infection was 58.1 percent, and the prevalence of gastric metaplasia was 57.0 percent. Seventy-six patients underwent endoscopy again. No influence on the endoscopic appearance of nodular duodenitis was found after eradication of H. pylori or acid suppression therapy. However, gastric metaplasia significantly decreased and complete regression was achieved in 15/28 patients (53.6 percent) 6 months after eradication of H. pylori, accompanied by significant improvement of other histological alterations. Only mild chronic inflammation, but not gastric metaplasia, was found in the control group, none with H. pylori infection in the duodenal bulb. Therefore, H. pylori infection is related to the extent of gastric metaplasia in the duodenum, but not to the presence of diffuse nodular duodenitis.

Development of a BALB/c mouse model of Helicobacter pylori infection with fresh and frozen bacteria

An experimental model for H. pylori infection was established by intragastrically challenging BALB/c mice with 1 ml (108 CFU/ml) of suspension for two consecutive days. Animals were divided into three groups. GA: mice inoculated with fresh bacteria; GB: mice inoculated with frozen bacteria, and GC: mice inoculated with brucella broth (control group). Animals were killed at 7, 14, 21, 28, 35 and 60 days pi and fragments of stomach and duodenum were collected, paraffin embedded and stained by hematoxylin-eosin and Giemsa. The results showed that challenged mice exhibited mild duodenitis and gastritis. In group GA, infiltration in the duodenum was lymphoplasmacytic until day 35; in group GB, it was lymphomonocytic for 60 days pi. In the stomach, H. pylori induced lymphomonocytic infiltration that was present from days 7 to 60 in group GA. In group GB, it was only present from days 14 to 35. In conclusion, our data suggested that freezing altered pathogenic properties of H. pylori and probably inhibited expression of bacterial antigens and consequently the establishment and maintenance of infection. Although the animals developed mild duodenitis and gastritis, the BALB/c mouse is not susceptible to developing peptic ulcers during H. pylori infection.

Aspectos clínicos e histológicos da úlcera duodenal em crianças e adolescentes / Clinical and histological features of duodenal ulcer in children and adolescents

OBJETIVO: Avaliar as características clínicas e histológicas de crianças e adolescentes com úlcera duodenal. MÉTODOS: Foram avaliadas prospectiva e consecutivamente 43 pacientes com úlcera duodenal ao longo de 6 anos (7,2 pacientes por ano). A avaliação consistiu de questionário clínico de sintomas dispépticos, exame físico e endoscopia digestiva com biópsias gástricas para exame histológico e detecção do Helicobacter pylori. RESULTADOS: A idade no diagnóstico variou de 4 anos e 8 meses a 17 anos e 4 meses (mediana = 12 anos e 4 meses). O sintoma mais freqüente foi dor abdominal (39/43, 90,7 por cento): no epigástrio em 31/39, periumbilical em 7/39 e noturna em 27/39. Outros sintomas freqüentes foram: diminuição do apetite (32/43, 74,4 por cento), vômitos (30/43, 69,8 por cento), plenitude pós-prandial (23/43, 53,5 por cento), perda de peso (22/43, 51,2 por cento) e sensibilidade abdominal (19/43, 44,2 por cento). Hemorragia digestiva alta ocorreu em 19/43 pacientes (44,2 por cento), e anemia em 21/43 (48,8 por cento). H. pylori foi detectado em 41/43 (95,3 por cento), e todos esses pacientes apresentaram gastrite crônica ativa de antro, 92 por cento deles com predomínio do infiltrado linfomononuclear. A erradicação da bactéria ocorreu em 68,3 por cento dos pacientes infectados, mas houve cicatrização da lesão em 100 por cento dos pacientes erradicados e em 89 por cento dos não-erradicados. CONCLUSAO: Ulcera duodenal foi associada à gastrite crônica por H. pylori na grande maioria dos pacientes. Houve grande freqüência de complicações, especialmente hemorragia digestiva alta.

Study of diagnostic modalities and pathology of Helicobacter pylori infection in children.

To evaluate various diagnostic tests for Helicobacter pylori (Hp) in children, and to study the spectrum of endoscopic and histological changes in the stomach and duodenum of children with gastroduodenal disorders, associated with Hp infection Children below 12 years of age with various gastroduodenal disorders requiring upper gastrointestinal endoscopy were studied. Endoscopic biopsy specimens were collected from duodenum and antrum. Apart from histopathological examination of biopsy material, rapid urease test (RUT) of the antral biopsy specimen and blood examination to estimate specific IgG antibodies to Hp by Indirect Solid Phase Enzyme Immunoassay was performed. Forty seven children were included. Nine (19.1%) of them were positive both by serology and RUT. Seven (14.9%) were positive by histology. A significant correlation of Hp was noticed with chronic antral gastritis (p = 0.002) and chronic duodenitis (p = 0.006). Age equal to or more than 10 years was found to be significant risk factor for acquiring Hp infection. Prevalence of Hp in children with gastroduodenal complaints was found to be 19%. Both RUT and serology were found to be reliable diagnostic tests for Hp as compared with histology. Antral gastritis and chronic duodenitis had a significant correlation with Hp colonization.

Prevalence of Helicobacter pylori at antral mucosa of patients with dyspepsia at University District Hospital

A total of 120 patients with dyspepsia were evaluated by endoscopy to determine the prevalence of Helicobacter pylori in the gastric antrum in 1988. It was found that duodenal ulcer and gastric ulcer were highly associated with this bacteria. Also statistically significant association between H.p. and active gastritis was observed

Endoscopic, histologic and microbiologic evaluation of upper abdominal pain with special reference to Helicobacter pylori infection.

OBJECTIVE: To study children with significant upper abdominal pain of unidentifiable etiology and evaluate: (a) the relationship of pain to inflammatory esophago-gastro-duodenal lesions and Helicobacter pylori (HP) infection, and (b) the response to specific therapy. DESIGN: Prospective study. SETTING: Pediatric section of a tertiary referral gastroenterology center. SUBJECTS: Thirty three consecutive children with significant upper abdominal pain [mean age 9.9 +/- 2.7, range 4-15 years; 20 males] were subjected to upper gastrointestinal tract endoscopy and antral mucosal biopsies obtained for rapid urease test (RUT), Gram's staining of impression/crush smears and culture for HP and histologic examination. Patients with HP gastritis were treated with triple therapy, colloidal bismuth subcitrate, amoxycillin and metronidazole, for two weeks. At 8 weeks from the initiation of therapy, patients were re-evaluated for symptoms and HP eradication by repeat endoscopy and antral biopsies. Patients with esophagitis, gastritis and duodenitis without HP infection were treated with ranitidine for 6 weeks. All the patients were followed up for 6 months. RESULTS: Histology revealed antral gastritis in 28/33 (85%) patients. HP infection was present in 12/28 (43%) patients with antral gastritis. Symptomatic improvement with triple therapy was observed in 10/12 (83%) patients with HP gastritis and eradication of HP in 5/7. Improvement on ranitidine therapy was observed in 12/16 (75%) patients with HP negative gastritis. On follow-up, no patient with initial improvement with therapy had relapse of symptoms. CONCLUSION: Symptomatic children with HP related gastritis should be treated with triple therapy and HP negative gastritis with H2-receptor antagonist.

Aislamiento de Helicobacter pylori de pacientes con trastornos gastroduodenales en San Luis (Argentina) / Helicobacter pylori isolated from patients with gastrointestinal tract diseases in San Luis (Argentina)

Se investigó la presencia de Helicobacter pylori en 50 pacientes con trastornos gastroduodenales que concurrieron a dos centros de salud de la ciudad de San Luis. De cada paciente se tomaron cuatro muestras de biopsia de mucosa de antro gástrico, dos de ellas destinadas al estudio histológico y dos al análisis bacteriológico: observación al Gram, prueba de ureasa y cultivo. Helicobacter pylori se detectó en 38 (76 por ciento) de los pacientes mediante el estudio histológico y en 30 (60 por ciento) por la tinción de Gram. De estos últimos, 28 (93 por ciento) dieron positiva la prueba de ureasa coincidiendo con un número significativo de bacterias. El 80 por ciento (24/30) de las muestras positivas al Gram mostró un buen desarrollo microbiano en los medios de cultivo de Mueller-Hinton y de Skirrow indistintamente. Se recomienda la prueba de ureasa como una alternativa de diagnóstico: rápida, económica y efectiva cuando hay una cantidad suficiente de bacterias.

Presencia de helicobacter pylori en el duodeno, antro y fundo de sujetos controles y pacientes con úlcera duodenal, úlcera gástrica, gastritis o duodenitis erosiva: análisis histológico de 357 sujetos / Presence of helicobacter pylori in duodenum, antrum and fundus in control subjects and in patients with duodenal ulcer, gastric ulcer, gastritis or erosive duodenitis: histological analysis of 357 subjects

The prevalence of helicobacter pylori infection was studied in 152 subjects with a normal upper gastrointestinal endoscopy, 125 with duodenal ulcer, 25 with gastric ulcer, 46 with erosive gastritis and 9 with erosive duodenitis. Two biopsies fron duodenum, antrum and fub¿ndus were obtained from each subject during endoscopy for histological diagnosis and Helicobacter pylori search. None of the patients with normal endoscopy and 2 percent of patients with duodenal ulcer had Helicobacter pylori in duodenal biopsies. These last patients had a significantly higher frecuency of Helicobacter pylori in the antrum (71 percent) than the rest of the studied groups. Five percent of subjects with normal endoscopy and 5 percent of those with duodenal ulcer had Helicobacter pylori in the antrum. An active gastritis was demonstrated in almost all patients with Helicobacter infection. Instestinal metaplasia occurred almost exclusively in the abscence of Helicobacter Pylori infection

Helicobacter pylori prevalence in northeastern Thailand.

Helicobacter pylori is distributed worldwide and has been demonstrated in Thailand. However, no study has been conducted so far in northeastern Thailand. The objective of this study was to find the prevalence of H. pylori in patients undergoing upper gastrointestinal endoscopy in northeastern part of Thailand. One hundred and twenty-six patients undergoing surgery between November 1992 and January 1993 were studied. Biopsies were done at antrum, corpus, and other positive lesions. Diagnostic tests of H. pylori by using CLO test, microbiological tests (Gram stain and culture), and histological examination (hematoxylin and eosin) were carried out. The prevalence of H. pylori by CLO test, Gram stain, culture, and histology were 49.2%, 61.9%, 22.2%, and 45.2% respectively. The overall prevalence of H. pylori by all diagnostic tests was 73.8% (95% confidence interval = 66.1-81.5%). This study revealed a high prevalence rate of H. pylori in patients which should alert clinicians who practice in this geographical area.

Helicobacter pylori and peptic ulcer disease in Sri Lanka.

The variation in the healing and the relapse rates of peptic ulcer disease has led to the search for other factors in the pathogensis of peptic ulcer disease. Helicobacter pylori is believed to be responsible for these different patterns of healing. The results of a study to detect Helicobacter pylori in Sri Lankan patients having duodenal ulcer, gastric ulcer, gastritis and non-ulcer dyspepsia are presented in this paper. The method employed was the urease test which detects the urease enzyme of H. pylori in gastric mucosal biopsies taken during upper gastrointestinal endoscopy. There is a high incidence in those with gastritis and duodenitis.

Presença del Campylobacter pyloridis en sintomatologia digestiva superior / Presence of Campylobacter pyloridis in symptomatology digestive superior

Motivados por los informes mundiales acerca de la asociación del Campylobacter pyloridis (C.P.) con las gastritis antrales, inicialmente y posteriormente con la úlcera gastroduodenal, en el Instituto de Gastroenterología de la Habana, se estudiaron 164 pacientes que acudieron al departamento de endoscopia superior todos por presentar síntomas digestivos superiores, tomándoseles 2-3 muestras de biopsias de la zona lesionada o del antro gástrico en los que la endoscopia fue normal, para la detección del C.P. por Gram y Ureasa principalmente y Cultivo en los posibles. En las gastritis se halló el C.P. en 8 de 12 pacientes - (66,6%) y en 7 de los 8 portadores de duodenitis (87,5%). De 50 pacientes con úlcera gástrica (U.G) se detectó el C.P. en 38(76%) y en 58 de los 78 con úlcera duodenal - (U.D.) (74.4%). Entre 16 pacientes endoscópicamente normales, sólo 4 eran normales histológicamente y de éstos en 2 se aisló el C.P. Se destaca en este estudio la importancia de este germen en la etiopatogenia de las afecciones gastroduodenales

Evaluation of different methods for detection of Helicobacter pylori in patients with gastric disease.

Endoscopic gastric antral biopsy specimens (133) from 92 dyspeptic patients with endoscopically evident gastritis (34; including one patient with dual pathology) gastric ulcer (13), duodenitis (17; including one patient with dual pathology) duodenal ulcer (29) and 41 subjects of non ulcer dyspepsia (NUD) with endoscopically normal upper gastrointestinal tract were examined for H. pylori by stained smear, various urease tests, culture and histopathology. Crushed tissue smear stained by Gram's method using carbol fuchsin counterstain proved to be the simplest and a reliable technique. Up to 4 h urease broth + ve test correlated well with smear and culture. Positive association of H. pylori with disease was considered when at least two of the above methods were suggestive. Significantly higher positivities were observed in gastritis (61.7%), gastric ulcer (84.6%), duodenitis (58.8%) and duodenal ulcer (82.8%) patients, as compared to NUD subjects (46.3%). Severe histopathological lesions were frequently associated with multiple bacteriological test positives.