Tratamiento de primera línea para erradicación de Helicobacter pylori: todavía una terapia eficaz / First-line treatment for eradication of Helicobacter pylori: Still an effective therapy

Resumen Objetivo: Este estudio tiene como objetivo principal determinar la respuesta al esquema de tratamiento de primera línea con triple terapia estándar (amoxicilina, claritromicina, omeprazol), para erradicación de Helicobacter pylori en una determinada población, para determinar si este esquema propuesto en guías internacionales es aún una opción adecuada para pacientes en una determinada región de Costa Rica. Métodos: Se realizó una búsqueda en el servicio de gastroenterología del Hospital San Francisco de Asís, Grecia, Alajuela, Costa Rica; de todos los pacientes con infección por Helicobacter pylori y que recibieron tratamiento de primera línea con triple terapia (amoxicilina, claritromicina y omeprazol) por 14 días, en el periodo comprendido entre febrero 2017 a febrero 2019, incluyendo para el análisis solamente en los que se contaba con una prueba confirmatoria posterior a tratamiento, ya fuera por antígeno fecal de H. pylori o biopsia convencional. Resultados: Se identificaron un total de 369 casos. El diagnóstico se realizó con biopsia en el 96,4% de los pacientes. La respuesta al tratamiento de primera línea se alcanzó en un 90.5% corroborada por antígeno fecal en el 92.1% de los casos. Conclusiones: Este estudio muestra que la terapia triple con amoxicilina, claritromicina e Inhibidor de bomba de protones por 14 días mantiene un adecuado nivel de eficacia. Sin embargo, hay que tomar en cuenta que estos datos son únicamente de un área de atracción determinada y puede que no reflejen la realidad de todo el país.

Abstract Aim: The main objective of this study is to determine the response to the firstline treatment regimen with triple standard therapy (amoxicillin, clarithromycin, omeprazole), to eradicate Helicobacter pylori in a certain population. The goal is to determine if the proposed regimen in international guidelines services is still a suitable option for patients in a certain region of Costa Rica. Methods: The study took place in San Francisco de Asís Hospital, Grecia, Alajuela, Costa Rica. All patients with a Helicobacter pylori infection that were given first- line treatment with triple therapy (amoxicillin, clarithromycin and omeprazole) for its eradication for 14 days, in the period between February of 2017 and February of 2019, were included in the study. Results: A total of 369 cases were identified. The diagnosis was made with biopsy in 96.4% of patients. Response to first-line treatment was achieved in 90.5% corroborated by fecal antigen in 92.1% of all cases. Conclusions: This study shows that triple therapy with amoxicillin, clarithromycin and omeprazole for 14 days maintains an adequate level of efficacy. However, it must be considered that these results are from a specific area and may not reflect the reality of the entire country.

Efficacy and safety of triple therapy containing berberine, amoxicillin, and vonoprazan for Helicobacter pylori initial treatment: A randomized controlled trial / 中华医学杂志(英文版)

BACKGROUND@#With the development of traditional Chinese medicine research, berberine has shown good efficacy and safety in the eradication of Helicobacter pylori (H. pylori). The present study aimed to evaluate the efficacy and safety of triple therapy containing berberine, amoxicillin, and vonoprazan for the initial treatment of H. pylori.@*METHODS@#This study was a single-center, open-label, parallel, randomized controlled clinical trial. Patients with H. pylori infection were randomly (1:1:1) assigned to receive berberine triple therapy (berberine 500 mg, amoxicillin 1000 mg, vonoprazan 20 mg, A group), vonoprazan quadruple therapy (vonoprazan 20 mg, amoxicillin 1000 mg, clarithromycin 500 mg, colloidal bismuth tartrate 220 mg, B group), or rabeprazole quadruple therapy (rabeprazole 10 mg, amoxicillin 1000 mg, clarithromycin 500 mg, colloidal bismuth tartrate 220 mg, C group). The drugs were taken twice daily for 14 days. The main outcome was the H. pylori eradication rate. The secondary outcomes were symptom improvement rate, patient compliance, and incidence of adverse events. Furthermore, factors affecting the eradication rate of H. pylori were further analyzed.@*RESULTS@#A total of 300 H. pylori-infected patients were included in this study, and 263 patients completed the study. An intention-to-treat (ITT) analysis showed that the eradication rates of H. pylori in berberine triple therapy, vonoprazan quadruple therapy, and rabeprazole quadruple therapy were 70.0% (70/100), 77.0% (77/100), and 69.0% (69/100), respectively. The per-protocol (PP) analysis showed that the eradication rates of H. pylori in these three groups were 81.4% (70/86), 86.5% (77/89), and 78.4% (69/88), respectively. Both ITT analysis and PP analysis showed that the H. pylori eradication rate did not significantly differ among the three groups (P >0.05). In addition, the symptom improvement rate, overall adverse reaction rate, and patient compliance were similar among the three groups (P >0.05).@*CONCLUSIONS@#The efficacy of berberine triple therapy for H. pylori initial treatment was comparable to that of vonoprazan quadruple therapy and rabeprazole quadruple therapy, and it was well tolerated. It could be used as one choice of H. pylori initial treatment.

Informe diário de evidências COVID-19: busca realizada em 20 de maio de 2020 / COVID-19 daily evidence report: search conducted on May 20, 2020

O Informe Diário de Evidências é uma produção do Ministério da Saúde que tem como objetivo acompanhar diariamente as publicações científicas sobre tratamento farmacológico e vacinas para a COVID-19. Dessa forma, são realizadas buscas estruturadas em bases de dados biomédicas, referente ao dia anterior desse informe. Não são incluídos estudos pré-clínicos (in vitro, in vivo, in silico). A frequência dos estudos é demonstrada de acordo com a sua classificação metodológica (revisões sistemáticas, ensaios clínicos randomizados, coortes, entre outros). Para cada estudo é apresentado um resumo com avaliação da qualidade metodológica. Essa avaliação tem por finalidade identificar o grau de certeza/confiança ou o risco de viés de cada estudo. Para tal, são utilizadas ferramentas já validadas e consagradas na literatura científica, na área de saúde baseada em evidências. Cabe ressaltar que o documento tem caráter informativo e não representa uma recomendação oficial do Ministério da Saúde sobre a temática. Foram encontrados 16 artigos e 7 protocolos.

Informe diário de evidências COVID-19: busca realizada em 27 de abril de 2020 / COVID-19 daily evidence report: search conducted on April 27, 2020

Essa é uma produção do Departamento de Ciência e Tecnologia (Decit) da Secretaria de Ciência, Tecnologia, Inovação e Insumos Estratégicos em Saúde (SCTIE) do Ministério da Saúde (Decit/SCTIE/MS), que tem como missão promover a ciência e tecnologia e o uso de evidências científicas para a tomada de decisão do SUS, tendo como principal atribuição o incentivo ao desenvolvimento de pesquisas em saúde no Brasil, de modo a direcionar os investimentos realizados em pesquisa pelo Governo Federal às necessidades de saúde pública. Informar sobre as principais evidências científicas descritas na literatura internacional sobre tratamento farmacológico para a COVID-19. Além de resumir cada estudo identificado, o informe apresenta também uma avaliação da qualidade metodológica e a quantidade de artigos publicados, de acordo com a sua classificação metodológica (revisões sistemáticas, ensaios clínicos randomizados, entre outros). Foram encontrados 9 artigos.

Infección por Helicobacter pylori: Frecuencia del fracaso del tratamiento de primera línea / Helicobacter pylori infection. Frequency of first-line treatment failure

La resistencia bacteriana a ciertos antibióticos condiciona el éxito del tratamiento erradicador de la infección gástrica por Helicobacter pylori y es motivo de creciente preocupación a nivel mundial. Dada la escasa evidencia publicada en Argentina sobre este tema, nuestro objetivo fue investigar factores asociados a la persistencia de H. pylori post-tratamiento antibiótico. Se determinó la frecuencia de fracaso terapéutico en 81 pacientes con gastritis por H. pylori tratados en nuestro Servicio y sometidos al estudio de urea en aire espirado para confirmar la erradicación de la infección. La edad promedio fue 58±12 y 43.2% eran hombres. La frecuencia de fracaso terapéutico fue 17.3%. De los dos esquemas más utilizados, la frecuencia de fracaso fue mayor con claritromicina + amoxicilina que con levofloxacina + amoxicilina (25% vs. 6.6%, p=0.04). Como factores de riesgo investigamos las siguientes variables: edad, género, síntomas, tabaquismo, consumo de anti-inflamatorios, diabetes, obesidad, tipo y duración de tratamiento. En el análisis univariado, el uso de esquemas con claritromicina y el género masculino se asociaron significativamente a persistencia de la infección [OR 4.2 (1.1-15.6) y 5.2 (1.1-26.4)]. En el análisis multivariado, el uso de esquema con claritromicina permaneció asociado al fracaso terapéutico [OR 5.38 (1.1-29.5)]. Concluimos que la inclusión de claritromicina en el esquema terapéutico para la gastritis por H. pylori se asoció a mayor fracaso terapéutico. Este fracaso es atribuible a alta prevalencia de resistencia de H. pylori a ese antibiótico en la población atendida en nuestro hospital y cuestiona las prácticas habituales de tratamiento en nuestro medio.

Antibiotic resistance may hinder the efficacy of eradication therapy against Helicobacter pylori infection and it has become a major concern worldwide. Due to the relatively scarce evidence published in Argentina on this topic, our aim was to describe factors associated with H. pylori persistence after antibiotic treatment. The therapeutic failure rate was described among 81 patients with H. pylori gastritis treated in our Hospital with a post-treatment urea breath test to determine successful eradication. Mean age was 58 ± 12 and 43.2% were male subjects. H. pylori persistence was observed in 17.3% of subjects. Therapeutic failure was more common among patients receiving clarithromycin + amoxicillin therapy that among those receiving levofloxacin + amoxicillin (25% vs. 6.6%, p = 0.04). The following variables were assessed: age, gender, referral symptoms, smoking, anti-inflammatory use, diabetes, obesity, treatment type and duration. Clarithromycin-based therapy and male gender were associated with infection persistence on univariate analysis [OR 4.2 (1.1-15.6) and 5.2 (1.1-26.4)]. On multivariate analysis, clarithromycin-based was associated with infection persistence [5.38 (1.1-29.5)]. We conclude that clarithromycin-based therapy is significantly associated with treatment failure. This failure may be due to an elevated prevalence of H. pylori resistance to clarithromycin in the population under study and raises the question on the utility of such therapeutic alternative.

Helicobacter pylori: resistencia múltiple en pacientes de Bogotá, Colombia / Helicobacter pylori: Multiple resistance in patients from Bogotá, Colombia

Resumen Introducción. La resistencia a los antibióticos es la principal causa del fracaso del tratamiento contra Helicobacter pylori; la claritromicina y el metronidazol son los antibióticos que generan mayor resistencia. En Colombia, la resistencia primaria a estos dos antibióticos y el uso excesivo de levofloxacina han alcanzado los límites aceptados (13,6, 83 y 16 %, respectivamente). A pesar de ello, se usa el tratamiento empírico combinando estos antibióticos en pacientes en los que ha fallado anteriormente. Objetivo. Determinar la resistencia a los antibióticos en pacientes previamente tratados para H. pylori en Bogotá, Colombia. Materiales y métodos. Se llevó a cabo un estudio descriptivo en el que se evaluó mediante dilución en agar la resistencia a la amoxicilina, la claritromicina, la levofloxacina y el metronidazol en 10 aislamientos provenientes de 5 pacientes con tres o cuatro tratamientos fallidos para H. pylori. La resistencia a los antibióticos se confirmó mediante secuenciación de ADN (Magrogen, Korea). Resultados. Ocho de los aislamientos presentaron resistencia a dos o más antibióticos y todos fueron resistentes a la levofloxacina. Los patrones de sensibilidad de los aislamientos provenientes del antro pilórico y del cuerpo del estómago, fueron diferentes en tres de los pacientes. Conclusión. Hasta donde se sabe, esta es la primera evidencia de resistencia múltiple de H. pylori en Colombia en pacientes previamente tratados. Los resultados evidenciaron las consecuencias del uso de un esquema ineficaz de tratamiento antibiótico y la necesidad de evaluar la sensibilidad a los antibióticos en diferentes sitios anatómicos del estómago. La resistencia múltiple limita el número de antibióticos útiles para erradicar H. pylori.

Abstract Introduction: The main cause for Helicobacter pylori infection treatment failure is antibiotic resistance, where clarithromycin and metronidazole play the main role. In Colombia, primary resistance as a consequence of the use of these two antibiotics and excessive levofloxacin use is above the accepted limit (13.6%, 83%, and 16%, respectively). Despite this fact, empirical therapies that include the combination of these antibiotics are used in patients with previous therapeutic failure. Objective: To determine antibiotic resistance in patients previously treated for H. pylori in Bogotá, Colombia. Materials and methods: We conducted a descriptive study that included ten isolates obtained from five patients with three or four previous failed treatments for H. pylori. Antibiotic resistance to amoxicillin, clarithromycin, levofloxacin, and metronidazole was investigated by agar dilution and confirmed by DNA sequencing (Magrogen, Korea). Results: Eight isolates were resistant to two or more antibiotics. All isolates were resistant to levofloxacin. Susceptibility patterns in isolates from the gastric antrum and the body of the stomach were different in three patients. Conclusion: As far as we know, this is the first evidence of multiple H. pylori resistance in Colombia in previously treated patients. Results demonstrated the consequences of using an ineffective antibiotic scheme and the need to assess antibiotic susceptibility in different anatomical sites of the stomach. The consequences of multiple resistance decrease possible antibiotic effectiveness to eradicate H. pylori in the future.

Post-surgical atypical mycobacteriosis in 125 patients in Rio de Janeiro

Abstract INTRODUCTION: The growing incidence of post-surgical atypical mycobacteriosis (PSAM) may be related to the increased use of low- and medium-complexity video-assisted surgery. METHODS: Between April 2007 and June 2009, 125 patients were referred from the State Health Department of Rio de Janeiro for the treatment of confirmed, probable, or suspected PSAM. RESULTS: Laparoscopic cholecystectomy was the most frequent surgical procedure (48.8%) among patients. Clarithromycin, ethambutol, and terizidone were used to treat 113 patients for a mean duration of 226 days. CONCLUSIONS: Despite the need for multidrug therapy and long treatment duration, most included patients adhered to treatment and experienced cure without relapse.

Erradicación de Helicobacter pylori, consideraciones clínicas según la edad / Helicobacter pylori eradication, clinical considerations related to age

Helicobacter pylori (H. pylori) is a gram negative bacteria that survives in the gastric acid environment. The infection is acquired mainly during childhood. Fifty to 70% of adult population has the infection. However, in the last 10 year, a decrease in the prevalence of this infection has been observed in all age groups, in particular in pediatric population and elderly patients over 60 years old. The evolution of the infection depends on bacterial factors (virulence and toxins) and host immune response. People infected mainly develop gastrointestinal diseases such as gastritis, peptic ulcer and MALT lymphoma. H. pylori infection is the main risk factor of gastric cancer and for that reason, the eradication is recommended if H. pylori has been detected through invasive or non-invasive tests. Among children, eradication is not recommended unless there is a clinical manifestation that merits. H. pylori eradication is recommended in symptomatic adults and there is a controversy about massive eradication in asymptomatic population due to the risk of development of antibiotic resistance. Treatment is based on the use of proton pump inhibitors (PPI) associated to antibiotics, that should be chosen taking into account the increasing antibiotic resistance, and local availability. Clarithromycin (CLA) and levofloxacin resistance is increasingly high, and CLA-free quadruple therapy schemes are currently recommended for first-line therapy. H. pylori eradication must be confirmed with invasive or non-invasive tests. Second-line therapy based on antibiotics not previously used, PPI high doses and bismuth is recommended.

Helicobacter pylori (H. pylori) es una bacteria gramnegativa que sobrevive en el medio ácido gástrico. La infección se adquiere principalmente en la niñez. Un 50 a 70% de la población adulta es portadora, pero en los últimos 10 años, se ha observado una disminución en la prevalencia de infección en todos los grupos etarios, en particular en población pediátrica y mayores de 60 años. La evolución de la infección depende de factores propios de la bacteria (virulencia, toxinas) y de la respuesta inmune del huésped. Los individuos infectados desarrollan principalmente patologías gastrointestinales como gastritis, úlcera péptica y linfoma MALT. La infección por H. pylori es el principal factor de riesgo del cáncer gástrico por lo que se recomienda su erradicación en caso de haberse detectado mediante test invasivo o no invasivo. En niños, no es recomendable la erradicación a menos que exista una manifestación clínica que lo amerite. Se recomienda su erradicación en adultos sintomáticos y existe controversia respecto a la erradicación masiva en población asintomática debido al riesgo de desarrollar resistencia antibiótica. El tratamiento se basa en el uso de inhibidores de la bomba de protones asociado a antibióticos, los cuales deben ser escogidos teniendo en cuenta la tasa de resistencia antimicrobiana y disponibilidad local. La resistencia a claritromicina (CLA) y levofloxacino es creciente, por lo que se recomienda el uso de esquemas de cuadriterapia libre de CLA en esquemas de primera línea. Se recomienda confirmar su erradicación con test no invasivos y retratar con esquema de segunda línea con antibióticos no utilizados previamente, asociado a dosis altas de inhibidores de bomba de protones y sales de bismuto.

Helicobacter pylori eradication: influence of interleukin-1beta -31 C/T polymorphism

ABSTRACT Aim To analyze the influence of the -31 C/T polymorphism of the interleukin-1β gene on Helicobacter pylori eradication therapy success in patients with functional dyspepsia. Methods Functional dyspepsia was diagnosed according to the Rome III criteria. All patients underwent upper gastrointestinal endoscopy, and gastric biopsies were obtained at screening and 12 months after randomization (last follow-up visit). Urease test and histological examination were performed to define the H. pylori status. Patients received twice-daily amoxicillin, clarithromycin and omeprazole for 10 days. Genotyping of the interleukin-1beta -31 C/T polymorphism (rs1143627) was performed using polymerase chain reaction-restriction fragment length polymorphism. Results One hundred forty-nine patients received treatment with triple therapy for H. pylori eradication. Only one patient was lost to follow-up, and adherence to study medication was 94.6%. A total of 148 patients (mean age 46.08 ± 12.24 years; 81.8% women) were evaluated for the influence of the interleukin-1beta -31 C/T polymorphism on the outcome of H. pylori eradication therapy. After treatment, bacteria were eradicated in 87% of patients (129/148). Genotype frequencies of the polymorphism were as follows: CC, 38/148 (25.7%); CT, 71/148 (47.9%); and TT, 39/148 (26.4%). Successful eradication rate was 78.9%, 94.4% and 82.1% for the CC, CT and TT genotypes, respectively. The CT genotype was significantly associated with successful H. pylori eradication (p= 0.039). Conclusion This study suggests that the CT genotype of the interleukin-1beta -31 C/T polymorphism plays a role in the successful eradication of H. pylori among patients with functional dyspepsia.

Effect of sequential therapy on treatment of Helicobacter pylori infection in children / Efecto de la terapia secuencial en el tratamiento de la infección por Helicobacter pylori en niños

Background: Helicobacter pylori infection which plays a major role in the etiology of chronic gastritis and duodenal ulcers in children and adults is one of the commonest chronic infection worldwide. Cure of the infection leads to healing of gastric inflammation and prevention of peptic ulcer. Objective: The aim of this study was to evaluate the efficacy of the sequential therapy for treatment of Helicobacter pylori infection. Materials and methods: In this study, 40 children with symptoms of H. Pylori that the infection was proved by endoscopy and biopsy and rapid urease test (UBT) were enrolled, and received sequential therapy (Lansoprazol, Amoxicillin) for 5 days and (Lansoprazol, Metronidazole and Clarithromycin) for next 5 days. The eradication rate of therapy was evaluated by stool antigen test 6 weeks after completion of therapy. This study was carried out in Pediatric Gastroenterology Clinic of Shiraz University of Medical Sciences, Shiraz, Iran. This study was approved by ethic committee of Shiraz University of Medical Sciences. Results: Forty children with mean age of (10.8±4 years) were evaluated. The most common symptom on first admission was epigastric pain (82.5%), with mean duration of symptoms (16±14.5 month). The most common endoscopic findings was redness and erosion of the antrum (55%) and the most pathologic findings was chronic gastritis (77.5%). The most drug adverse effect was nausea (22.5%). The eradication rate of sequential therapy was 82.5%. Conclusion: Eradication rate of sequential therapy was 82.5% among our cases.

Antecedentes: La infección por Helicobacter pylori, que juega un rol principal en la etiología de la gastritis crónica y las úlceras duodenales en niños y adultos, es una de las infecciones crónicas más comunes en el mundo. La cura de esta infección lleva a la cura de la inflamación gástrica y a la prevención de la úlcera péptica. Objetivo: Evaluar la eficacia de la terapia secuencial en el tratamiento de la infección por Helicobacter pylori. Material y métodos: En este estudio, se enrolaron 40 niños con síntomas en los que la infección por H. pylori se demostró por endocopía con biopsia y prueba rápida de ureasa (UBT) y recibieron terapia secuencial (Lansoprazol, Amoxicilina) por 5 días y (lansoprazol, metronidazol y clarotromicina) por otros 5 días. La tasa de erradicación de la terapia se evaluó por prueba de antígeno en heces 6 semanas después de terminar la terapia. Este estudio se llevó a cabo en la Clínica de Gastroenterología Pediátrica de la Universidad de Ciencias Médicas de Shiraz, Irán. El estudio fue aprobado por el comité de ética de la Universidad de Ciencias Médicas de Shiraz. Resultados: Se evaluaron cuarenta niños con una edad media de (10,8±4 años). El síntoma más común al ingreso fue dolor epigástrico (82,5%) con una duración media de síntomas de (16±14,5 meses). El hallazgo endoscópico más común fue enrojecimiento y erosión del antro (55%) y el hallazgo patológico más común fue gastritis crónica (77,5%). El evento adverso más común fue náusea (22,5%). La tasa de erradicación de la terapia secuencial fue 82,5%. Conclusión: La tasa de erradicación de la terapia secuencial fue de 82,5% en nuestros casos.

efficacy of levofloxacin-based triple therapy for helicobacter pylori eradication after failure with clarithromycin-containing regimens

Background: Clinical trials and meta-analyses have reported about 20% failure rates in first-line Helicobacter pylori [H. pylori] eradication. This reflects the need for effective second-line eradication regimens

Materials and Methods: 61 patients with H. pylori infection who had failed previous non-bismuth clarithromycin-containing first line therapies entered the study. They were given a 14-day levofloxacin-containing triple regimen consisted of pantoprazole 40 mg, amoxicillin 1gr, and levofloxacin 500mg, each given twice daily. Eight weeks after the treatment, H. pylori eradication was assessed by 14C-urea breath test

Results: All patients completed the study. The eradication rate was 91.8% [95% confidence interval = 84.9% - 98.6%] by both intention to treat and per-protocol analyses. Side effects of therapy were reported by eight patients [13.1%], but they were severe in only two patients [3.2%]

Conclusion: According to the high H. pylori eradication rate and the very low rate of severe adverse effects, levofloxacin-containing triple therapy seems to be a suitable second-line option in case of previous failure by clarithromycin-containing therapies. We suggest further studies with shorter duration of treatment or lower dose of levofloxacin

Erradicación de Helicobacter pylori con terapia triple estándar de primera línea / Helicobacter pylori eradication with standard first-line triple therapy

La infección por Helicobacter pylori es una de las infecciones crónicas más comunes a nivel mundial y causa importante de enfermedad péptica y cáncer gástrico. Infecta al 50% de la población adulta con mayor prevalencia en América Central/Sur y Asia y al menos dos veces mayor en poblaciones con alta incidencia de cáncer gástrico. Los objetivos de esta investigación fueron identificar la tasa de erradicación de H. pylori con terapia triple estándar y las posibles características asociadas a su erradicación. Se estudió a 119 pacientes con diagnóstico de infección por H. pylori, seleccionados en forma consecutiva de la consulta externa de Gastroenterología del Hospital General San Juan de Dios. Se realizó endoscopia diagnóstica y toma de biopsia gástrica. Se dio terapia triple estándar con lansoprazol, amoxicilina y claritromicina durante 10 días, seguido de 30 días con lansoprazol. Seis semanas después de completado el tratamiento se evaluó el antígeno de H. pylori en heces para determinar si hubo erradicación. La edad promedio de los participantes fue 49.0 años, 81.5% mujeres, 85.7% de área urbana, el síntoma más común fue dispepsia en 86.6%. En el examen post tratamiento el 89.9%, IC 95% [83.0, 94.7] presentó antígeno en heces negativo. No se encontró asociación entre las características de los pacientes con la respuesta al tratamiento. En conclusión, la respuesta a la terapia triple de primera línea se encuentra dentro del rango aceptable para continuar con ese esquema, pero debe mantenerse una evaluación constante por la presencia de posible resistencia.

Infection by Helicobacter pylori is one of the most common chronic infections worldwide and an important cause of peptic disease and gastric cancer. It infects 50% of the adult population with the highest prevalence in Central / South America and Asia and at least twice as high in populations with a high incidence of gastric cancer. The objectives of this research were to identify the eradication rate of H. pylori after first line standard triple therapy and the possible characteristics associated with its eradication. It was studied 119 patients with a diagnosis of H. pylori infection, selected consecutively from the outpatient department of Gastroenterology of the San Juan de Dios General Hospital. Diagnostic endoscopy and gastric biopsy was performed. Standard triple therapy was given with lansoprazole, amoxicillin and clarithromycin for 10 days, followed by 30 days with lansoprazole. Six weeks after the treatment was completed, the H. pylori antigen in feces was evaluated to determine if there was eradication. The average age of the participants was 49.0 years, 81.5% women, 85.7% of urban area, the most common symptom was dyspepsia in 86.6%. In the post-treatment examination 89.9%, 95% CI [83.0, 94.7] presented negative antigen in feces. No association was found between the characteristics of the patients with the response to treatment. In conclusion, the response to first line triple therapy is within the acceptable range to continue with this scheme, but a constant evaluation must be maintained due to the presence of possible resistance.

Píloro doble: de lo cotidiano a lo extraordinario: reporte de caso y revisión de la literatura / Double pylorus: from the everything to the extraordinary: case report and literature review

Antecedentes: El píloro doble constituye un hallazgo endoscópico extremadamente raro, siendo más frecuente en pacientes que padecen enfermedad ulcerosa péptica. Corresponde a una comunicación anormal entre el antro gástrico y el bulbo duodenal, que puede llegar a requerir tratamiento quirúrgico. Caso clínico: Mujer de 86 años de edad con antecedentes de diabetes mellitus tipo 2, hipertensión arterial, así como ingesta crónica de AINE, portadora de enfermedad ácido-péptica de larga evolución con poca respuesta al manejo médico con bloqueadores H2, la cual presenta sangrado de tubo digestivo durante 5 días caracterizado por hematemesis y melena, así como pirosis, náuseas, sin pérdida ponderal; por este motivo se realiza endoscopia digestiva alta la cual reporta como hallazgos: gastritis erosiva crónica activa secundaria a AINE y asociada a Helicobacter pylori, así como píloro doble adquirido secundario a enfermedad ácido-péptica, sin evidencia de tumores u otras lesiones asociadas. Se inicia esquema de erradicación para H. pylori con amoxicilina y claritromicina durante 14 días, asociados a inhibidor de bomba de protones durante 6-8 semanas con buena respuesta al manejo médico. Discusión: El píloro doble adquirido es una rara complicación de úlcera péptica que puede ser asociada a otras enfermedades, AINE y a la colonización por H. pylori, por lo tanto el adecuado tratamiento consistirá en la corrección de esos factores.

Background: The double pylorus is an extremely rare endoscopic finding, being more frequent in patients suffering from peptic ulcer disease. It corresponds to an abnormal communication between the gastric antrum and the duodenal bulb, which may require surgical treatment. Clinical case: A 86-year-old woman with a history of type 2 diabetes mellitus, hypertension and chronic NSAID intake, a carrier of long-term peptic acid disease with poor response to medical management with H2 blockers. This presents digestive tube bleeding for 5 days characterized by hematemesis and melena, as well as heartburn, nausea, without weight loss, reason why high digestive endoscopy is performed, which reports as findings: active chronic erosive gastritis secondary to NSAIDs and associated with Helicobacter pylori, as well as acquired double pylorus secondary to peptic acid disease, without evidence of tumors or other associated lesions. Eradication scheme begins for H. pylori with amoxicillin and clarithromycin for 14 days, associated with a proton pump inhibitor for 6-8 weeks with good response to medical management. Discussion: The acquired double pylorus is a rare complication of peptic ulcer disease that can be associated with other diseases, NSAIDs and colonization by H. pylori, therefore the appropriate treatment will consist in the correction of these factors.

Efectividad de un nuevo régimen simplificado en la erradicación de Helicobacter pylori. Estudio prospectivo realizado en una clínica privada de Lima Metropolitana / New simplified regimen for Helicobacter pylori eradication achieves high effectiveness. Prospective study in a private clinic in Lima, Peru

RESUMEN Objetivo: Determinar la efectividad de dos nuevos esquemas para el tratamiento de Helicobacter pylori frente al esquema triple convencional de amoxilina, claritromicina y un inhibidor de bomba de protones. Materiales y métodos: Estudio prospectivo, no aleatorio, realizado en una clínica privada de Lima, Perú. Los pacientes con infección por Helicobacter demostrada por endoscopia con biopsia y/o test de la ureasa, recibieron uno de tres tratamientos en estudio y fueron examinados mediante el test del aliento con urea C14, entre 1 y 6 meses después. Resultados: El tratamiento triple convencional solo logró la erradicación en 49/68 casos (71,2%) y el cuádruple con doxiciclina, metronidazol, bismuto y esomeprazol lo hizo en 52/62 casos (83,9%) siendo esta diferencia no significativa (p>0,1). El esquema simplificado de doxiciclina, furazolidona y bismuto logró curar a 79/83 pacientes (95,2%) superando a los dos anteriores con valor significativo (p<0,005 y p<0,05 respectivamente). Conclusiones: El tratamiento triple convencional para Helicobacter no está alcanzando niveles aceptables de efectividad en nuestra institución. Esto enfatiza la necesidad de buscar nuevas alternativas; por lo que sería útil validar con nuevos estudios los buenos resultados logrados por el régimen Simplificado de doxiciclina, furazolidona y bismuto que aquí presentamos

ABSTRACT Objective: To determine the effectiveness of two new therapeutic regimes for Helicobacter pylori versus triple therapy that includes a proton pump inhibitor, amoxicillin and clarithromycin. Materials and methods: prospective study, non-randomized, in a private Hospital in Lima, Peru. Patients with biopsy and/or rapid ureasa test proven Helicobacter pylori infection received one of the three therapeutic regimens and were followed with a urea breath test 1 to 6 months upon completion of therapy. Results: Triple therapy achieved eradication in 49/68 of cases (71.2%); quadruple therapy (doxycycline + metronidazole + bismuth + esomeprazole) in 52/62 (83.9%), and the simplified regimen with doxycycline + furazolidone + bismuth, obtained success in 79/83 of cases (95.2%). Statistically significant difference with p<0.005 and p<0.05 respectively. Conclusion: Triple therapy against Hp does not achieve acceptable effectiveness in our institution. This highlights the need to look for new therapeutic options, being the simplified regime (doxycycline, furazolidone and bismuth) used in the current study a good option, requiring further studies for validation.

Therapeutic success with bismuth-containing sequential and quadruple regimens in Helicobacter pylori eradication

Background and study aims: The success rate of Helicobacter pylori [H. pylori] eradication with the classical triple therapy is gradually declining. In this study, we aimed to compare and assess the efficacies of six different eradication regimens including sequential protocols

Patients and methods: Endoscopically confirmed nonulcer dyspepsia patients were enrolled. H. pylori presence was determined either histologically or by a rapid urease test. Treatment-naive patients were randomly assigned to an either one of three 10-day [OAC, OTMB, and OACB] or one of three sequential protocols [OA + OCM, OA + OCMB, and OA + OMDB] [O = omeprazole, A = amoxicillin, C = clarithromycin, T = tetracycline, M = metronidazole, B = bismuth, D = doxycycline]. The eradication was assessed 6-8 weeks after the completion of the treatment by a 14C-urea breath test

Results: In total, 301 patients were included. Fifty-two percent of the participants [n = 157] were female, and the mean age was 44.9 years [range = 18-70]. The intention to treat [ITT] and per protocol [PP] eradication rate for each regimen is as follows: OAC [ITT = 61.2%, PP = 75%], OTMB [83.3%, 87%], OACB [76.5%, 79.6%], OA + OCM [72.3%, 73.9%], OA + OCMB [82.7%, 89.6%], and OA + OMDB [59.3%, 65.3%]. Smoking significantly affected the eradication rate [P = 0.04]

Conclusion: In this study, OTMB and OA + OCMB were significantly superior to the triple therapy and succeeded to reach the eradication rate proposed by the Maastricht consensus [over 80%]. These two bismuth-containing regimens could be considered for first-line therapy in the regions with high clarithromycin resistance

Eficacia de terapia concomitante sin bismuto en la erradicación de Helicobacter pylori en Chile: estudio prospectivo / Efficacy of non-bismuth concomitant therapy for Helicobacter pylori eradication in Chile: a prospective study

Standard triple therapy (TT), used massively as first-line empirical therapy for Helicobacter pylori (H. pylori) eradication, has shown a progressive decrease in its effectiveness, probably due to increasing resistance to clarithromycin. Recent studies in Chile show eradication under 90%, a limit suggested as adequate efficacy. The so-called concomitant therapy (CT) comprising a proton pump inhibitor, amoxicillin, clarithromycin and metronidazole is the non-bismuth first-line therapy most recommended in current guidelines. However, we have no local data to assess the effectiveness of this regimen. The aim of this study was to prospectively evaluate the effectiveness of CT in a group of patients controlled at a private health center in Santiago, Chile. Patients received 40 mg esomeprazole, 1 g amoxicillin, 500 mg clarithromycin and 500 mg metronidazole, every 12 hours, for 14 days. Sixty-six patients were included, of these patients, 36 returned to control. CT was successful in 33/36 patients, corresponding to 92% (95% CI: 82.5-100%, per protocol analysis). The frequency of significant side effects was 25% (mainly diarrhea and abdominal pain) and only one patient discontinued the treatment. In conclusion, 14-days CT therapy is effective to eradicate H. pylori and could be recommended as first-line empirical regimen, at least in the studied population segment and geographical area. Additional studies are necessary to confirm its efficacy in other socioeconomic and/or geographical settings.

La terapia triple estándar (TT), utilizada masivamente como terapia de primera línea empírica para erradicación de Helicobacter pylori (H. pylori) ha mostrado una progresiva disminución de su efectividad, probablemente por resistencia creciente a claritromicina. Los últimos estudios en Chile muestran erradicación bajo 90%, límite sugerido como eficacia adecuada. Esto ha motivado la búsqueda de esquemas alternativos más eficaces, siendo la así llamada terapia concomitante (TC), que consiste en un inhibidor de la bomba de protones, amoxicilina, claritromicina y metronidazol, el esquema sin bismuto más recomendado en guías clínicas recientes. Sin embargo, no contamos con datos locales que evalúen su efectividad. El objetivo del presente estudio fue evaluar prospectivamente la efectividad de TC en un grupo de pacientes controlados en un centro de salud privado de Santiago de Chile. Los pacientes recibieron esomeprazol 40 mg, amoxicilina 1 g, claritromicina 500 mg y metronidazol 500 mg cada 12 h, por 14 días. Se incluyeron 66 pacientes, de los cuales 36 volvieron a control. La TC fue exitosa en 33/36 pacientes, correspondientes al 92% (IC 95%: 82,5-100%; análisis por protocolo). La frecuencia de efectos colaterales significativos fue 25% (principalmente diarrea y dolor abdominal) y sólo un paciente suspendió el tratamiento por esta causa. En conclusión, la TC por 14 días es efectiva para erradicar H. pylori, al menos en el segmento poblacional y área geográfica estudiados y es un esquema empírico que pudiera recomendarse como primera línea en nuestro medio, aunque se requiere confirmar su eficacia en otros grupos poblacionales.

To evaluate of the effect of adding licorice to the standard treatment regimen of Helicobacter pylori

ABSTRACT Objective: The aim of this study was to evaluate the effect of licorice in H. pylori eradication in patients suffering from dyspepsia either with peptic ulcer disease (PUD) or non-ulcer dyspepsia (NUD) in comparison to the clarithromycin-based standard triple regimen. Methods: In this randomized controlled clinical trial, 120 patients who had positive rapid urease test were included and assigned to two treatment groups: control group that received a clarithromycin-based triple regimen, and study group that received licorice in addition to the clarithromycin-based regimen for two weeks. H. pylori eradication was assessed six weeks after therapy. Data was analyzed by chi-square and t-test with SPSS 16 software. Results: Mean ages and SD were 38.8 ± 10.9 and 40.1 ± 10.4 for the study and control groups, respectively, statistically similar. Peptic ulcer was found in 30% of both groups. Response to treatment was 83.3% and 62.5% in the study and control groups, respectively. This difference was statistically significant. Conclusion: Addition of licorice to the triple clarithromycin-based regimen increases H. pylori eradication, especially in the presence of peptic ulcer disease.