Helicobacter Pylori — Symptoms, Diagnosis and Home Antigen Test

What is Helicobacter pylori?

Helicobacter pylori is a gram-negative, spiral-shaped bacterium that colonizes the gastric mucosa — the protective lining of the stomach. It is one of the most prevalent chronic infections in humans: roughly 50% of the world's population is infected, with prevalence rates reaching 60–80% in Poland depending on age group.

H. pylori has co-evolved with humans for thousands of years, employing a remarkable survival strategy. The bacterium produces urease, an enzyme that breaks down urea into ammonia and carbon dioxide. The ammonia neutralizes hydrochloric acid in the bacterium's immediate environment, creating a microenvironment with a pH compatible with its survival in the otherwise extremely acidic stomach.

Approximately 80% of infected individuals remain asymptomatic and may carry the bacterium for decades without knowing it. However, 10–20% of carriers eventually develop gastritis or peptic ulcer disease (stomach and/or duodenal ulcers), and 1–3% face an elevated risk of gastric cancer — making H. pylori a WHO Class I carcinogen.

Symptoms of H. pylori infection

When H. pylori infection becomes symptomatic, the most commonly reported complaints fall into three categories:

Dyspeptic symptoms: Epigastric pain or burning (especially on an empty stomach or at night), postprandial fullness, bloating, belching, and nausea. These symptoms are often grouped under the term "functional dyspepsia" and can persist for weeks or months.

Alarm symptoms (requiring urgent medical evaluation): Unintentional weight loss, vomiting blood or "coffee-ground" emesis, black tarry stools (melena) indicating gastrointestinal bleeding, iron-deficiency anemia of unknown origin, and difficulty swallowing (dysphagia).

Extra-gastric manifestations: A growing body of research links H. pylori to conditions outside the digestive tract, including iron-deficiency anemia (even without visible bleeding), immune thrombocytopenic purpura (ITP), and chronic urticaria (hives).

If you experience persistent stomach pain or recurring digestive problems, testing for H. pylori is one of the first diagnostic steps recommended by gastroenterologists.

How does the home H. pylori test work?

The iLabU H. pylori test (model IHP-602H) is an immunochromatographic stool antigen test that detects H. pylori antigens directly in a fecal sample. Unlike serological (blood-based) tests that detect antibodies and cannot distinguish between a current and a past infection, a stool antigen test confirms an active, ongoing infection.

The procedure is straightforward: 1. Collect a small stool sample using the provided applicator by piercing the stool in at least three different spots (do not scoop — just puncture). 2. Insert the applicator into the buffer tube and shake vigorously to mix. 3. Apply 2 drops of the extracted solution to the sample well on the test cassette. 4. Read the result at 10 minutes.

Two lines (C and T) indicate a positive result — H. pylori antigens have been detected. Any shade of color on the T line, even faint, constitutes a positive. A single C line means the test is negative. No C line means the test is invalid and must be repeated.

Test reliability vs laboratory methods

The IHP-602H carries CE0123 certification (TÜV SÜD) and demonstrates the following performance characteristics: • Sensitivity: >96% (correctly identifies infected individuals) • Specificity: >96% (correctly identifies non-infected individuals)

For comparison, here is how other H. pylori diagnostic methods perform: • Urea breath test (UBT): 95–100% sensitivity and specificity — considered the gold standard for non-invasive testing • Laboratory ELISA stool antigen test: 94–97% sensitivity • Gastric biopsy during endoscopy: the most accurate method overall, but invasive and more costly

The home cassette test is a reliable first-line screening tool. A positive result should be confirmed by a physician, who will typically prescribe triple therapy — a proton pump inhibitor (PPI) combined with two antibiotics — for 10–14 days. Eradication rates with standard triple therapy reach 80–90%.

Treatment and prevention

H. pylori eradication is the standard of care for patients with peptic ulcer disease, MALT lymphoma, a family history of gastric cancer (first-degree relatives), iron-deficiency anemia of unexplained origin, and chronic dyspepsia. Current international guidelines strongly recommend treating all confirmed infections.

The standard OCA regimen consists of omeprazole 20 mg twice daily, clarithromycin 500 mg twice daily, and amoxicillin 1000 mg twice daily for 14 days. This protocol achieves eradication in 80–90% of cases. In regions with high clarithromycin resistance, bismuth-based quadruple therapy may be preferred.

Prevention centers on good hygiene: thorough handwashing, avoiding sharing utensils and drinking vessels, and safe food preparation. Transmission occurs via the fecal-oral and oral-oral routes, and most infections are acquired during childhood.

After completing treatment, a control test should be performed 4–6 weeks later to confirm successful eradication. Do not test earlier, as residual antigens may yield false positives.

Related product

• Helicobacter Pylori Test 20.00 PLN

Frequently asked questions

Can I take the test during antibiotic treatment?

No. Antibiotics can suppress H. pylori antigen levels and produce a false-negative result. Wait at least 4 weeks after completing any antibiotic course and at least 2 weeks after stopping proton pump inhibitors (omeprazole, pantoprazole, etc.) before testing.

Can I get reinfected after successful treatment?

Yes, but the risk is low — approximately 1–2% per year in developed countries. In Poland, where the carrier rate is higher, reinfection risk may be slightly elevated. Maintaining good hygiene practices significantly reduces the chance of reinfection.

Can children be infected with H. pylori?

Yes. Most H. pylori infections are actually acquired during childhood, often through close contact within the family. In children, symptoms may include recurrent abdominal pain, nausea, and poor appetite. The stool antigen test is safe and appropriate for pediatric use.