Recurrencia de la infección gástrica con Helicobacter pylori en adultos peruanos con distrés postprandial dos años después de la erradicación exitosa / Recurrence rate of Helicobacter pylori infection two years after successful eradication in Peruvian patients presenting with postprandial distress syndrome

Introducción: Hasta el año 2000, en Perú se habían reportado tasas de recurrencia de H. pylori muy altas que podrían hacer inefectiva la erradicación de la infección a largo plazo e incrementar la prevalencia de cáncer gástrico y otras patologías asociadas. Materiales y métodos: Estudio de cohorte única, prospectivo. Se reclutaron participantes peruanos con distrés postprandial e infección con H. pylori diagnosticada mediante el análisis histopatológico de biopsias gástricas. Aquellos con erradicación exitosa después del tratamiento fueron contactados dos años después para determinar la tasa de recurrencia mediante la prueba del aliento con urea marcada. Resultados: De 129 participantes dispépticos infectados con H. pylori elegibles, 101 tuvieron erradicación exitosa de la infección y 28 permanecieron infectados post-tratamiento. La tasa de efectividad fue de 77,2%. Dos años después, se pudieron contactar a 65 participantes con erradicación exitosa post-tratamiento, 5 de los cuales tuvieron recurrencias positivas y 60 permanecieron libres de la infección. La tasa de recurrencia fue 7,7% dos años posttratamiento (IC 1,5%-13.5%, = 0,05) y la tasa de recurrencia anual fue 3,85% por año-paciente de seguimiento. El 94% de los participantes seguidos provenían del nivel socioeconómico bajo de la ciudad, el 95,4% contaba con agua potable domiciliaria y el 90,8% consumía agua hervida diariamente. Conclusiones: La tasa de recurrencia del H. pylori en algunas poblaciones del Perú es baja y comparable a la de los países desarrollados. En estas poblaciones, la erradicación del H. pylori podría constituir una medida de salud pública para el control de la infección.

Introduction: The general reported recurrence rate of H. pylori infection in Peru is high, implying that the long term effectiveness of anti H. pylori therapy is lower than expected. This would lead to an increase in the prevalence of gastric cancer and other associated pathologies. Materials and Methods: This is a prospective cohort study including Peruvian patients with postprandial distress and H. pylori infection confirmed by gastric biopsy who recieved treatment and achieved bacterial eradication. Two years after the initial diagnosis, patients were contacted to determine the recurrence rate of H. pylori infection through the Urea breath test. Results: 101 /129 of the patients that were infected with H. pylori had a successful eradication of the infection and 28/129 failed to eradicate the bacteria. The effectiveness rate of treatment was 77.2%. Two years after successful eradication we were able to contact 65/101 participants, 5 of them presented positive urea breath tests (recurrence rate of infection of 7.7%) (IC 1.5%-13.5%, α= 0.05). The annual recurrence rate was 3.85% per year/ patient. 94% of the patients in the cohort came from poor city areas, 95.4% had drinking water at home and 90.8% drank boiled drinking water on a daily basis. Conclusions: The recurrence rate of H. pylori in some populations of Peru is lower than expected and comparable with developed countries.

Seleção e uso de antibióticos em infecções intra-abdominais / Selection and use of anti-infective agents for intra-abdominal infections

RACIONAL: Infecções intra-abdominais são comuns e apresentam elevada morbidade e mortalidade e os agentes infecciosos responsáveis por tais afecções são geralmente os da flora gastrointestinal, em especial a E. coli e Bacteroides fragilis. OBJETIVO: Apresentar uma revisão da seleção e uso de antibióticos em infecções intra-abdominais. CONCLUSÕES: O uso adequado de antibióticos é fundamental para o controle mais rápido da infecção e reduzir a possibilidade de falha no tratamento. A terapia antimicrobiana é iniciada na suspeita de infecção intra-abdominal e os agentes antibióticos selecionados são utilizados de acordo com os germes mais prováveis de serem encontrados no local da infecção. Além disso, eficácia, custo, segurança e comodidade posológica são considerados para uma seleção mais apropriada. Diferentes esquemas são utilizados em infecções intra-abdominais comunitárias e hospitalares devido à flora mais resistente destas últimas.

BACKGROUND: Intra-abdominal infections are common and are associated with elevated morbidity and mortality. The microorganisms that cause intra-abdominal infections are usually from the gastrointestinal flora, mainly E. coli and Bacteroides fragilis. AIM: To present a review of the selection and use of antibiotics in intra-abdominal infections. CONCLUSIONS: Appropriate use of antibiotics is essential to control infection and to reduce treatment failure. Antibiotics are initiated whenever intra-abdominal infection is suspected and the antimicrobial agents are selected based on the most common microorganisms involved. In addition, efficacy, cost, safety, and posologic regimen are considered for an appropriated selection. Antibiotic regimen is different whether the infection is acquired in the community or at hospital due to the more resistant flora in the latter.