What is Helicobacter pylori and why is it dangerous?
The bacterium Helicobacter pylori (H. pylori) is one of the most common pathogens affecting the human gastrointestinal tract. It is recognized as a major risk factor for the development of peptic ulcer disease (PUD) [1]. Additionally, H. pylori infection is closely associated with chronic gastritis and increases the risk of gastric cancer [7].
This bacterium possesses unique mechanisms for survival in the acidic environment of the stomach. One of its key virulence factors is outer membrane vesicles (OMVs), which can influence the expression of inflammatory markers and are associated with the development of extra-gastric diseases [5]. Understanding these mechanisms is critically important for developing effective treatment and prevention strategies.
Symptoms of Helicobacter pylori Infection
Symptoms of H. pylori infection can range from mild to severe and often resemble other gastrointestinal disorders. The most common manifestations include:
- Epigastric pain: felt in the upper abdomen and is the most frequent symptom, reported in 83% of patients [7].
- Nausea and vomiting: occur in 58% of infected individuals [7].
- Less frequent symptoms: weight loss (24%) and pallor (18%) [7].
- Dyspeptic symptoms: abdominal bloating, belching, feeling of fullness after eating.
H. pylori infection can also cause extra-gastric manifestations. For example, it is associated with laryngopharyngeal reflux disease (LPRD). Patients with LPRD infected with H. pylori showed significant differences in dysphagia symptoms (difficulty swallowing) and signs of vocal cord edema compared to patients without H. pylori [4]. This highlights the need for a comprehensive approach to diagnosis and treatment.
Diagnosis of Helicobacter pylori: Modern Methods
Accurate diagnosis of H. pylori infection is crucial for choosing the correct treatment strategy. Several effective methods exist:
- Urea Breath Test (UBT): is a non-invasive and highly sensitive method. It is based on the ability of H. pylori to produce the enzyme urease, which hydrolyzes urea. The test is effective even in patients with ulcer bleeding who are taking proton pump inhibitors (PPIs), showing an acceptable level of positive results (66.2% in one study) [8].
- H. pylori Stool Antigen Test: also a non-invasive method used for initial diagnosis and monitoring treatment efficacy [7].
- Endoscopy with Biopsy: allows obtaining gastric mucosa samples for histological examination and a rapid urease test [3]. This method also provides an opportunity to assess the state of the mucosa and identify ulcers or other pathologies.
- Culture with Antibiotic Susceptibility Testing: is particularly important when antibiotic resistance is suspected, which is becoming an increasingly serious problem [7].
Modern technologies, such as deep learning algorithms, can help endoscopists quickly assess H. pylori infection status based on endoscopic features, classifying patients into current, past, or negative infection groups [6].
Treatment of Helicobacter pylori: Strategies and Challenges
The main goal of H. pylori treatment is the complete eradication (elimination) of the bacterium, which prevents ulcer recurrence and reduces the risk of gastric cancer. However, growing antibiotic resistance complicates this process [1, 7].
Standard Treatment Regimens:
Traditionally, regimens including a combination of antibiotics and proton pump inhibitors (PPIs) are used. These regimens are known as triple or quadruple therapy. For example, one study used a 14-day levofloxacin-based triple therapy [7]. For patients with H. pylori-associated LPRD, anti-HP quadruple therapy proved effective [4].
The Role of Probiotics:
Studies show that adding probiotics to standard triple therapy can significantly improve treatment outcomes. In one study, H. pylori-infected peptic ulcer patients who received probiotics combined with triple therapy showed a higher eradication rate (95.15% vs. 83.33% in the control group) and better improvement in digestive tract symptoms [2]. Probiotics can reduce antibiotic side effects and increase eradication efficacy.
Optimization and Monitoring:
To improve treatment and testing efficiency for H. pylori in hospitals, educational programs for patients and physicians are being implemented, and bioinformatics tools in electronic health records, such as SmartSet order sets, are used to facilitate optimal antibiotic prescribing and eradication monitoring [1].
When to Initiate Eradication Therapy?
The question of the timing for initiating eradication therapy (ET) is particularly relevant for patients with peptic ulcer bleeding (PUB). Studies show that ET can be initiated both during hospitalization and in an outpatient setting [3]. In one study, 53.7% of PUB patients had confirmed H. pylori infection prior to hospital discharge [3]. The duration of hospitalization influenced infection confirmation before discharge [3].
It is important to note that the urea breath test can be performed after active bleeding has stopped, even while taking high doses of proton pump inhibitors, allowing for timely diagnosis of the infection and initiation of treatment [8].
Sources
- 1. A Quality Improvement Initiative to Increase Helicobacter pylori Testing and Eradication Among Patients Diagnosed With Peptic Ulcer Disease in a U.S. Safety-Net Hospital. PubMed
- 2. Probiotics in the treatment of peptic ulcer infected by helicobacter pylory and its safety. PubMed
- 3. Optimal initiation of Helicobacter pylori eradication in patients with peptic ulcer bleeding. PubMed
- 4. Preliminary study on symptoms and signs of patients with laryngopharyngeal reflux disease infected with Helicobacter pylori. PubMed
- 5. Evaluation of Helicobacter pylori-derived outer membrane vesicles on the expression of inflammatory cytokines. PubMed
- 6. Rapid diagnosis of Helicobacter pylori infection status based on endoscopic features and deep learning algorithms. PubMed
- 7. Antimicrobial resistance, bacterial density, and eradication outcomes of Helicobacter pylori infection in Egyptian patients: A prospective cohort study. PubMed
- 8. Urea Breath Testing to Detect Helicobacter pylori in Patients with Peptic Ulcer Bleeding During Proton Pump Inhibitor Treatment. PubMed
Disclaimer
The information provided in this article is for reference purposes only and cannot replace professional medical advice, diagnosis, or treatment. Always consult a qualified physician for individual recommendations and therapy prescription.