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Updated: Jan 5, 2026
Gastric Mucosa Quantitative Polymerase Chain Reaction Analysis for Detecting Helicobacter pylori and Antibiotic Resistance
Published on: March 7, 2025
Pathogenesis and clinical management of Helicobacter pylori gastric infection
Breno Bittencourt de Brito1, Filipe Antônio França da Silva1, Aline Silva Soares1
1Instituto Multidisciplinar em Saúde, Universidade Federal da Bahia, Vitória da Conquista 45029-094, Bahia, Brazil.
Abstract:
Helicobacter pylori (H. pylori) is a gram-negative bacterium that infects approximately 4.4 billion individuals worldwide. However, its prevalence varies among different geographic areas, and is influenced by several factors. The infection can be acquired by means of oral-oral or fecal-oral transmission, and the pathogen possesses various mechanisms that improve its capacity of mobility, adherence and manipulation of the gastric microenvironment, making possible the colonization of an organ with a highly acidic lumen. In addition, H. pylori presents a large variety of virulence factors that improve its pathogenicity, of which we highlight cytotoxin associated antigen A, vacuolating cytotoxin, duodenal ulcer promoting gene A protein, outer inflammatory protein and gamma-glutamyl transpeptidase. The host immune system, mainly by means of a Th1-polarized response, also plays a crucial role in the infection course. Although most H. pylori-positive individuals remain asymptomatic, the infection predisposes the development of various clinical conditions as peptic ulcers, gastric adenocarcinomas and mucosa-associated lymphoid tissue lymphomas. Invasive and non-invasive diagnostic methods, each of them with their related advantages and limitations, have been applied in H. pylori detection. Moreover, bacterial resistance to antimicrobial therapy is a major challenge in the treatment of this infection, and new therapy alternatives are being tested to improve H. pylori eradication. Last but not least, the development of effective vaccines against H. pylori infection have been the aim of several research studies.
Insights
Helicobacter pylori (H. pylori) infects billions globally, causing various diseases. Research focuses on diagnosis, treatment resistance, and vaccine development for this common bacterial infection.
Area of Science:
- Microbiology
- Infectious Diseases
- Gastroenterology
Background:
- Helicobacter pylori is a widespread gram-negative bacterium infecting billions worldwide.
- Infection transmission occurs via oral-oral or fecal-oral routes, with H. pylori employing mechanisms for gastric colonization.
- H. pylori possesses numerous virulence factors contributing to pathogenicity and host immune response modulation.
Purpose of the Study:
- To provide a comprehensive overview of Helicobacter pylori infection.
- To discuss diagnostic methods, treatment challenges, and potential therapeutic strategies.
- To highlight ongoing research in H. pylori vaccine development.
Main Methods:
- Review of existing literature on H. pylori epidemiology, pathogenesis, diagnosis, and treatment.
- Analysis of H. pylori virulence factors and host immune responses.
- Examination of current challenges in H. pylori eradication and vaccine research.
Main Results:
- H. pylori infection is linked to peptic ulcers, gastric cancer, and MALT lymphomas.
- Antimicrobial resistance poses a significant challenge to H. pylori eradication.
- Development of effective H. pylori vaccines remains an active area of research.
Conclusions:
- H. pylori infection presents a substantial global health burden with diverse clinical outcomes.
- Effective diagnosis and treatment strategies are crucial, alongside addressing antimicrobial resistance.
- Vaccine development holds promise for long-term prevention and control of H. pylori infections.
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