ROLE OF HELICOBACTER PYLORI INFECTION AND LIFESTYLE HABITS IN THE DEVELOPMENT OF GASTRODUODENAL DISEASES IN A POPULATION FROM THE BRAZILIAN AMAZON

  • VINAGRE R
  • VILAR-e-SILVA A
  • FECURY A
  • et al.
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Abstract

Context Although more than half of the world's population is colonized with Helicobacter pylori, it remains unknown why this organism is able to produce severe disease in some hosts and be innocuous in others. The clinical outcome of infection is determined by several factors, including differences in the host response to bacterial stimulation, specific virulence factors of the organism and environmental influences, or a combination of these factors. Objectives This study compared the prevalence of H. pylori infection and risk factors (infection with CagA+ strains, excessive alcohol consumption, smoking, and inadequate eating habits) between patients with different gastrointestinal disorders and associated these risk factors with the histopathological findings. Methods In a prospective study, samples were collected from 442 patients and a standardized questionnaire regarding lifestyle habits (excessive alcohol consumption, smoking, and eating habits) was applied. The presence of H. pylori and of the cagA gene was investigated by polymerase chain reaction (PCR). Gastric biopsies were obtained for histological assessment. Results The frequency of alcohol consumption, smoking, inadequate diet and infection with CagA+ H. pylori was higher among patients with peptic ulcer and adenocarcinoma when compared to those with gastritis. Gastric inflammation was more pronounced in patients infected with CagA+ strains. Conclusion We conclude that infection with CagA+ H. pylori strains, excessive alcohol consumption, smoking and inadequate eating habits increase the risk of developing peptic ulcer and gastric carcinoma.Contexto Apesar de o H. pylori colonizar o estômago de aproximadamente metade da população mundial, ainda se desconhece por quê esse organismo é capaz de causar doença severa em certos hospedeiros e ser inofensivo em outros. As manifestações clínicas da infecção são determinadas por vários fatores, tais como: diferentes respostas do hospedeiro ao estímulo bacteriano, fatores de virulência específicos do organismo e influências ambientais ou a combinação desses fatores. Objetivos Esse estudo tem como objetivo comparar a prevalência e a associação dos fatores de risco, tais como: infecção por cepas H. pylori CagA+, consumo excessivo de bebidas alcoólicas, uso de tabaco e hábitos inadequados de alimentação entre pacientes com diferentes doenças gastrointestinais e a associação deles com achados histopatológicos. Métodos Em estudo prospectivo, foram cole-tadas amostras de 442 pacientes submetidos a um questionário padronizado com perguntas sobre hábitos de vida (uso excessivo de álcool, tabaco e, hábitos alimentares). A presença do H. pylori e do gene cagA foi detectada utilizando a Reação em Cadeia da Polimerase (PCR). As biópsias gástricas foram avaliadas histologicamente. Resultados O consumo de bebida alcoólica, uso de tabaco, dieta inadequada e infecção por cepas H. pylori CagA+ foram maiores entre pacientes com úlcera péptica e adenocarcinoma do que em pacientes com gastrite. Os pacientes infectados por cepas H. pylori CagA+ apresentaram inflamação gástrica de maior intensidade. Conclusão A presença de infecção por cepas H. pylori CagA+, o consumo excessivo de álcool, de tabaco e hábitos de alimentação inadequados aumentam o risco de desenvolvimento de úlcera péptica e carcinoma gástrico.

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APA

VINAGRE, R. M. D. F., VILAR-e-SILVA, A., FECURY, A. A., & MARTINS, L. C. (2013). ROLE OF HELICOBACTER PYLORI INFECTION AND LIFESTYLE HABITS IN THE DEVELOPMENT OF GASTRODUODENAL DISEASES IN A POPULATION FROM THE BRAZILIAN AMAZON. Arquivos de Gastroenterologia, 50(3), 170–174. https://doi.org/10.1590/s0004-28032013000200030

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